Method and apparatus for scheduling multiple cells by using a single downlink control information

Abstract

The present disclosure describes methods, systems, and devices for scheduling at least one cell for a user equipment (UE) via downlink control information (DCI). One method includes receiving, by the UE, DCI from a network base station via a physical downlink control channel (PDCCH), the DCI being for scheduling at least one physical downlink shared channel (PDSCH) on at least one cell. Another method includes sending, by the network base station, DCI to the UE via the PDCCH, the DCI being for scheduling at least one PDSCH on at least one cell.

Description

Technical Field

[0001] The present disclosure generally relates to wireless communication. Specifically, the present disclosure relates to methods and apparatuses for scheduling multiple cells via a single downlink control information (DCI). Background Art

[0002] Wireless communication technologies are pushing the world towards an increasingly connected and networked society. High-speed and low-latency wireless communications rely on effective network resource management and allocation between user equipment and wireless access network nodes (including but not limited to wireless base stations). The new generation of networks is expected to provide high-speed, low-latency, and ultra-reliable communication capabilities and meet the needs of different industries and users. There are some problems and / or challenges associated with scheduling one or more cells using a single downlink control information (DCI). The present disclosure can solve at least some of the problems related to existing systems to improve the performance of wireless communications. Summary of the Invention

[0003] This document relates to methods, systems, and apparatuses for wireless communication, and more particularly, to methods, systems, and apparatuses for scheduling multiple cells via a single downlink control information (DCI).

[0004] In one embodiment, the present disclosure describes a method for wireless communication. The method includes scheduling, for a user equipment (UE), at least one cell using downlink control information (DCI) by: receiving, by the user equipment (UE), via a physical downlink control channel (PDCCH), the downlink control information (DCI) for scheduling a physical downlink shared channel (PDSCH) on the at least one cell.

[0005] In another embodiment, the present disclosure describes a method for wireless communication. The method includes scheduling, by a network base station, at least one cell using downlink control information (DCI) by: transmitting, by the network base station, via a physical downlink control channel (PDCCH), the downlink control information (DCI) for scheduling a physical downlink shared channel (PDSCH) on the at least one cell.

[0006] In some other embodiments, the present disclosure describes an apparatus for wireless communication, which may include a memory storing instructions and a processing circuit communicating with the memory. When the processing circuit executes the instructions, the processing circuit is configured to perform the above methods.

[0007] In some other embodiments, the present disclosure describes an apparatus for wireless communication, which may include a memory storing instructions and a processing circuit communicatively coupled to the memory. When the processing circuit executes the instructions, the processing circuit is configured to perform the above-described method.

[0008] In some other embodiments, the present disclosure describes a computer-readable medium including instructions that, when executed by a computer, cause the computer to perform the above-described method.

[0009] The above aspects and other aspects and their implementations are described in more detail in the drawings, the description, and the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 An example of a wireless communication system including a wireless network node and one or more user equipments is shown.

[0011] Figure 2 An example of a network node is shown.

[0012] Figure 3 An example of a user equipment is shown.

[0013] Figure 4 A flowchart of a method for wireless communication is shown.

[0014] Figure 5 A flowchart of another method for wireless communication is shown.

[0015] Figure 6 An exemplary embodiment of a table including a Carrier Indication Field (CIF) and a list of corresponding cells is shown.

[0016] Figure 7A Another exemplary embodiment of a table including a CIF and a list of corresponding cells is shown.

[0017] Figure 7B Another exemplary embodiment of a table including a CIF and a list of corresponding cells is shown.

[0018] Figure 7C Another exemplary embodiment of a table including a CIF and a list of corresponding cells is shown.

[0019] Figure 7D Another exemplary embodiment of a table including a CIF and a list of corresponding cells is shown.

[0020] Figure 8 Another exemplary embodiment of a table including a CIF and a list of corresponding cells is shown.

[0021] Figure 9AAnother exemplary embodiment of a table is shown, which includes a list of CIFs and corresponding cells.

[0022] Figure 9B Another exemplary embodiment of a table is shown, which includes a list of CIFs and corresponding cells. Detailed Description of the Invention

[0023] The present disclosure will now be described in detail below with reference to the accompanying drawings, which form a part of the present disclosure and illustrate specific examples of some embodiments by way of illustration. However, it should be noted that the present invention can be implemented in various different forms, and thus, the subject matter covered or claimed is intended to be construed as not limited to any of the embodiments set forth below.

[0024] Throughout the specification and claims, terms may have nuanced meanings suggested or implied in contexts beyond the explicitly stated meanings. Similarly, the phrases "in one embodiment" or "in some embodiments" used herein do not necessarily refer to the same embodiment, and the phrases "in another embodiment" or "in other embodiments" used herein do not necessarily refer to different embodiments. As used herein, the phrase "in one implementation" or "in some implementations" does not necessarily refer to the same implementation, and the phrases "in another implementation" or "in other implementations" used herein do not necessarily refer to different implementations. For example, the claimed subject matter is intended to include combinations of whole or parts of exemplary embodiments or implementations.

[0025] Generally, terms can be understood at least in part from their use in context. For example, as used herein, terms such as "and", "or", or "and / or" can have various meanings, which can depend at least in part on the context in which such terms are used. Generally, "or" if used to associate a list, such as A, B, or C, is intended to mean A, B, and C, used herein in an inclusive sense, as well as A, B, or C, used herein in an exclusive sense. Additionally, at least in part depending on the context, the term "one or more" or "at least one" as used herein can be used to describe any feature, structure, or property in a singular sense, or can be used to describe a combination of features, structures, or properties in a plural sense. Similarly, terms such as "a", "an", or "the" can also be understood to convey singular use or convey plural use, at least in part depending on the context. Furthermore, the terms "based on" or "determined by" can be understood as not necessarily intending to convey an exclusive set of factors, and can alternatively allow for the existence of additional factors that are not necessarily explicitly described, which also depends at least in part on the context.

[0026] The present disclosure describes methods and apparatuses for scheduling one or more cells using a single Downlink Control Information (DCI).

[0027] The new generation (NG) mobile communication systems are pushing the world towards an increasingly connected and networked society. High-speed and low-latency wireless communications rely on effective network resource management and allocation between user equipment and wireless access network nodes (including but not limited to wireless base stations). The new generation of networks is expected to provide high-speed, low-latency, and ultra-reliable communication capabilities and meet the needs of different industries and users.

[0028] The 4th generation mobile communication technology (4G) Long-Term Evolution (LTE) or LTE-Advance (LTE-A) and the 5th generation mobile communication technology (5G) face increasing demands. Based on the development trend, 4G and 5G systems can be developed to support the characteristics of enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC), and massive machine-type communication (mMTC). According to dynamic spectrum sharing (DSS), some of the spectrum used for 4G can be reused for 5G.

[0029] In a 5G communication system, a secondary serving cell (SCell) can be only a scheduling cell or a scheduled cell, while a primary cell (PCell) or a primary and secondary cell (PSCell) can be a scheduling cell and can not be a scheduled cell. Some problems and / or challenges are related to the current system. One of the problems / challenges can include that the physical downlink control channel (PDCCH) of the PCell / PSCell can schedule the physical downlink shared channel (PDSCH) or the physical uplink shared channel (PUSCH) on the SCell, but the PDSCH or PUSCH on the PCell / PSCell may not be scheduled by the PDCCH of the SCell. Considering DSS in the NR communication system, the resources of the PDCCH of the PCell / PSCell may be limited. In the case where the PDCCH of the PCell / PSCell / SCell uses a single DCI to schedule the PDSCH on one or two cells, the problems and / or challenges may include: how to schedule two cells, how to fall back to schedule one of the two cells, and how to achieve that the maximum number of PDCCH blind decoding times does not increase.

[0030] The present disclosure describes multiple embodiments for scheduling multiple cells using a single downlink control information (DCI), which at least solves some of the above problems / challenges. Some embodiments include how to improve the NR PDCCH cross-carrier scheduling including the PDCCH of the PCell / PSCell / SCell for offloading the PCell / PSCell PDCCH, so as to schedule the PDSCH on one or more cells using a single DCI.

[0031] Figure 1FIG. 100 shows a wireless communication system including a wireless network node 118 and one or more user equipments (UEs) 110. The wireless network node may include a network base station, which may be a Node B (NB, e.g., gNB) in a mobile telecommunications context. Each of the UEs may communicate wirelessly with the wireless network node via one or more wireless channels 115. For example, the first UE 110 may communicate wirelessly with the wireless network node 118 via a channel including a plurality of wireless channels during a specific time period. The network base station 118 may send high-layer signaling to the UE 110. The high-layer signaling may include configuration information for communication between the UE and the base station. In one embodiment, the high-layer signaling may include radio resource control (RRC) messages.

[0032] Figure 2 FIG. 200 shows an example of an electronic device 200 implementing a network base station. The example electronic device 200 may include radio transmit / receive (Tx / Rx) circuitry 208 to transmit / receive communications with UEs and / or other base stations. The electronic device 200 may also include a network interface circuitry 209 to enable the base station to communicate with other base stations and / or a core network, e.g., via an optical interconnect or a wired interconnect, Ethernet, and / or other data transmission media / protocols. The electronic device 200 may optionally include an input / output (I / O) interface 206 to communicate with an operator, etc.

[0033] The electronic device 200 may also include a system circuitry 204. The system circuitry 204 may include one or more processors 221 and / or a memory 222. The memory 222 may include an operating system 224, instructions 226, and parameters 228. The instructions 226 may be configured to cause one or more processors 124 to perform functions of the network node. The parameters 228 may include parameters supporting the execution of the instructions 226. For example, the parameters may include network protocol settings, bandwidth parameters, radio frequency mapping assignments, and / or other parameters.

[0034] Figure 3An example of an electronic device implementing a terminal device 300 (e.g., a user equipment (UE)) is shown. The UE 300 can be a mobile device, e.g., a smart phone or a mobile communication module installed in a vehicle. The UE 300 can include a communication interface 302, a system circuit 304, an input / output interface (I / O) 306, a display circuit 308, and a storage device 309. The display circuit can include a user interface 310. The system circuit 304 can include any combination of hardware, software, firmware, or other logic / circuits. The system circuit 304 can be implemented, for example, by one or more systems on a chip (SoCs), application specific integrated circuits (ASICs), discrete analog and digital circuits, and other circuits. The system circuit 304 can be part of the implementation of any desired function in the UE 300. In this regard, the system circuit 304 can include, for example, logic for facilitating the decoding and playing of music and videos, such as the decoding and playback of MP3, MP4, MPEG, AVI, FLAC, AC3, or WAV; running applications; accepting user input; saving and retrieving application data; establishing, maintaining, and terminating cellular phone calls or data connections, as an example, for an Internet connection; establishing, maintaining, and terminating wireless network connections, Bluetooth connections, or other connections; and displaying relevant information on the user interface 310. The user interface 310 and the input / output (I / O) interface 306 can include a graphical user interface, a touch-sensitive display, haptic feedback or other haptic outputs, voice or face recognition inputs, buttons, switches, speakers, and other user interface elements. Other examples of the I / O interface 306 can include a microphone, video and still image cameras, temperature sensors, vibration sensors, rotation and orientation sensors, headphone and microphone input / output jacks, universal serial bus (USB) connectors, storage card slots, radiation sensors (e.g., IR sensors), and other types of inputs.

[0035] Reference Figure 3, the communication interface 302 may include radio frequency (RF) transmit (Tx) and receive (Rx) circuitry 316 that processes the transmission and reception of signals via one or more antennas 314. The communication interface 302 may include one or more transceivers. A transceiver may be a wireless transceiver that includes modulation / demodulation circuitry, a digital to analog converter (DAC), a shaping table, an analog to digital converter (ADC), filters, a waveform shaper, filters, a preamplifier, a power amplifier, and / or other logic for transmitting and receiving via one or more antennas or (for some devices) via a physical (e.g., wireline) medium. The signals transmitted and received may conform to any of a variety of formats, protocols, modulation schemes (e.g., QPSK, 16-QAM, 64-QAM, or 256-QAM), frequency channels, bit rates, and encodings. As a specific example, the communication interface 302 may include transceivers that support transmission and reception under 2G, 3G, BT (Bluetooth), WiFi, Universal Mobile Telecommunications System (UMTS), High Speed Packet Access (HSPA)+, 4G / Long Term Evolution (LTE), and 5G standards. However, the techniques described below are applicable to other wireless communication technologies, whether produced by the 3rd Generation Partnership Project (3GPP), GSM Association, 3GPP2, IEEE, or other partners or standards bodies.

[0036] Reference Figure 3 , the system circuitry 304 may include one or more processors 321 and a memory 322. The memory 322 stores, for example, an operating system 324, instructions 326, and parameters 328. The processor 321 is configured to execute the instructions 326 to perform the desired functions of the UE 300. The parameters 328 may provide and specify configuration and operation options for the instructions 326. The memory 322 may also store any BT, WiFi, 3G, 4G, 5G, or other data that the UE 300 will transmit via the communication interface 302 or has received. In various embodiments, the system power of the UE 300 may be provided by a power storage device, such as a battery or transformer.

[0037] This disclosure describes several embodiments below, which may be implemented, in whole or in part, on Figures 2-3 the network base stations and / or user equipment described.

[0038] Reference Figure 4, this disclosure describes embodiments of a method 400 for scheduling at least one cell, and the scheduling of the cell is achieved by downlink control information (DCI) for a user equipment (UE). The method 400 may include step 410: receiving, by the UE via a physical downlink control channel (PDCCH), the DCI for scheduling at least one physical downlink shared channel (PDSCH) on the at least one cell.

[0039] Reference Figure 5 , this disclosure describes embodiments of a method 500 for scheduling at least one cell, and the scheduling of the cell is achieved by downlink control information (DCI) for a user equipment (UE). The method 500 may include step 510: sending, by a network base station via a physical downlink control channel (PDCCH), the DCI for scheduling at least one physical downlink shared channel (PDSCH) on the at least one cell. The at least one cell may include one cell, two cells, three cells or more than three cells. In this disclosure, multiple embodiments and implementations are described by taking one or two cells as examples. However, this does not limit the scope of this disclosure. The methods, devices and systems in the described embodiments / implementations may also be applicable when at least one cell includes more than two cells.

[0040] In one implementation of various embodiments, the at least one cell includes a first cell and a second cell. The DCI is used to schedule the first cell and the second cell according to one of the following methods. Method 1 includes scheduling the first cell and the second cell in a semi-static mode, where the combination of the first cell and the second cell is semi-statically configured by higher layer signaling. Method 2 includes scheduling the first cell and the second cell in a dynamic mode, where the combination of the first cell and the second cell is dynamically indicated by the DCI. Method 3 includes scheduling the first cell and the second cell in a semi-dynamic mode, where the DCI schedules the first cell and the second cell as one of the combinations semi-statically configured by higher layer signaling. Method 4 includes scheduling the first cell and the second cell in a predefined mode, where the first cell is indicated by the DCI, and the second cell is preset according to the first cell.

[0041] Optionally, in another implementation of various embodiments, the DCI includes a carrier indicator field (CIF). The first cell is indicated by the DCI, and the second cell is preset according to the first cell, including one of the following methods. Method 1 includes scheduling the first cell according to the CIF and scheduling the second cell according to another CIF that is CIF + 1. Method 2 includes scheduling the first cell according to the CIF and scheduling the second cell according to another CIF that is zero. Method 3 includes scheduling the first cell according to the CIF and scheduling the second cell according to another CIF configured by higher layer signaling.

[0042] Optionally, in another implementation of various embodiments, each of the first cell and the second cell is configured to correspond to at least one CIF according to the CIF configuration. The CIF configuration includes one of the following methods. Method 1 includes configuring each of the first cell and the second cell through the CIF and configuring different cells with different CIFs. Method 2 includes configuring each of the first cell and the second cell through the CIF and allowing different cells to have the same CIF. Method 3 includes configuring each of the first cell and the second cell through a first CIF and a second CIF, where the first CIF is used for single cell scheduling and the second CIF is used for two cell scheduling.

[0043] Optionally, in another implementation, in response to the first cell and the second cell having the same CIF, a physical uplink shared channel (PUSCH) on one of the cells is scheduled according to one of the following methods. Method 1 includes configuring one of the first cell and the second cell for the PUSCH according to the configuration of higher layer signaling. Method 2, configuring one of the first cell and the second cell not for the uplink according to the configuration of higher layer signaling. Method 3, configuring both the first cell and the second cell not for the uplink according to the configuration of higher layer signaling.

[0044] Optionally, in another implementation, the DCI is used to schedule a single cell in a fallback scheduling mode according to one of the following methods. Method 1 includes a DCI that includes a first CIF and a second CIF, where the value of the first CIF is the same as the value of the second CIF. Method 2 includes a DCI that includes a first CIF and a second CIF, where one of the first CIF and the second CIF includes a special value. Method 3 includes a DCI that includes at least one independent indication field, where all the independent indication fields have special values. For example but not limited to, the special value may include at least one of the following values: non-numerical value, all "0", all "1", or a value configured by higher layer signaling.

[0045] Optionally, in another embodiment, the size of the DCI is determined as follows: for one or more shared indication fields in the DCI for the first cell and the second cell, the size of the one or more shared indication fields is determined based on the maximum size among the at least one cell; for one or more independent indication fields in the DCI for the first cell and the second cell, the size of the one or more independent indication fields is determined based on at least one of the following methods. Method 1 includes the size of the first cell plus the maximum size among at least one cell other than the first cell. Method 2 includes the size of the first cell plus the maximum size of each independent indication field among one or more independent indication fields in at least one cell other than the first cell.

[0046] Optionally, in another embodiment, the DCI size alignment is determined by at least one of the following methods. Method 1 includes aligning DCI format 0_1 and format 1_1 when the DCI schedules two cells and does not maintain the DCI size budget. Method 2 includes performing at least one of the following alignments when DCI format 1_2 and format 0_2 are configured: DCI format 0_1, format 1_1, format 1_2, and format 0_2;; or DCI format 0_1, format 1_1, and the DCI that schedules two cells.

[0047] Optionally, in another embodiment, the UE-specific search space (USS) for detecting the DCI (carried by the PDCCH) is determined by at least one of the following methods. Method 1 includes determining the USS based on one of the first cell and the second cell, and performing PDCCH blind decoding in the determined USS. Method 2 includes determining the USS based on both the first cell and the second cell, and performing PDCCH blind decoding in the determined USS. Method 3 includes, when the first cell and the second cell have the same CIF, determining the USS based on the aggregation level (AL) and the union of candidates corresponding to the first cell and the second cell, and performing PDCCH blind decoding in the determined USS. Method 4 includes, when one of the first cell and the second cell has more than one CIF, determining the USS based on (n CI mod N CI ), where N CIis a predefined or configured value. Method 5 includes determining the USS based on the single-cell scheduling corresponding CIFs that schedule at least one of the first cell and the second cell when one of the first cell and the second cell has more than one CIF.

[0048] The present disclosure describes the following multiple exemplary embodiments, which are only used as examples and do not limit the scope of the present disclosure.

[0049] In one embodiment, the present disclosure describes a method of using a single DCI including two CIFs as an independent indication for two cells. This embodiment can solve at least some of the problems / difficulties discussed above regarding the existing system and bring some beneficial effects. For example, by dynamically indicating the downlink shared channel scheduling two cells, flexible combination of two cells is achieved. When the DCI size is determined, it can be ensured that the types of DCI sizes and the blind detection complexity do not exceed the thresholds specified by the prior art and no additional complexity is introduced. The present invention can support the downlink traffic channel function of scheduling two cells by one DCI with maximum flexibility and improve system efficiency.

[0050] In a carrier aggregation (CA) scenario, a single DCI for two scheduled cells can be sent on the primary scheduling cell, which can be any one of the PCell, PSCell, or SCell, and the DCI can be carried by the PDCCH. The DCI can include two independent CIF indications, which respectively indicate the two scheduled cells.

[0051] In one implementation, the combination of two cells can be arbitrary, that is, the DCI can schedule the PDSCH on any two CIF-corresponding carriers. For example, referring to Figure 6 , there are four cells 614 and four CIF values 612. Each of the four cells 614 corresponds to a uniquely configured CIF index 612. For example, the CIF with a value of "0" can indicate cell A, the CIF with a value of "1" can indicate cell B, the CIF with a value of "2" can indicate cell C, and the CIF with a value of "3" can indicate cell D. The DCI can include any possible combination of valid CIF values, which indicates any possible combination of two of the four cells, such as but not limited to, {CIF = 0, CIF = 1}, {CIF = 1, CIF = 2}, etc.

[0052] Optionally, in another implementation, the combination of two cells can be a limited combination with semi-static configuration. For example, there are four carriers, and the configured CIF indexes are as Figure 6As shown. In one embodiment, the candidate combinations of two cells in the semi-static configuration may include: {Cell A, Cell B}, {Cell A, Cell C}, {Cell A, Cell D}, {Cell B, Cell C}, {Cell C, Cell D}, and the combination of two cells may be dynamically indicated in the candidate combinations of the semi-static configuration, such as {CIF = 0, CIF = 1}, {CIF = 2, CIF = 3}. In this specific example, it may not be possible to indicate {CIF = 1, CIF = 3} because {Cell B, Cell D} is not one of the candidate combinations in the semi-static configuration.

[0053] Optionally, in another embodiment, the method may include using DCI to schedule one of the two cells. This embodiment may include various methods that can be used to implement DCI scheduling for one cell. One method may include that the two CIFs indicate the same value, which indicates the same cell. Another method may include that one of the two CIFs is valid and the other CIF takes a special value, for example but not limited to, the special value includes non-numeric, all "1", or all "0". Another method may include that all independent indication fields for the second cell in the DCI are set to special values, for example but not limited to, the special value may be the same value for different independent indication fields, such as non-numeric, all 0, all 1, or a value configured by higher layer signaling. Optionally, the special values of different independent indication fields can be set independently.

[0054] Optionally, in another embodiment, the method may include determining the DCI size. For one or more shared indication fields, the cell with the largest size can be used to determine the DCI size. For example, the cell with the largest size among the valid cells in the dynamic combination can be used to determine the size of the field. One or more least significant bits (LSBs) of other single-cell fields may be valid, and the indication of one or more most significant bits (MSBs) can be ignored. For one or more independent indication fields, one embodiment may include various methods. One method includes: determining the DCI size of one DCI for scheduling two cells through the size of the combination of one cell and other cells with the largest size. In some cases, when the carrier combination of two cells is dynamic, the DCI size of one DCI for scheduling two cells can be determined by adding the largest size of other cells and the size of this cell. Another method includes: determining the DCI size of one DCI for scheduling two cells through the combination of the largest size of each bit field in other cells and this cell. The latter method may result in a larger DCI size because each bit field is determined by the largest size of other cells.

[0055] Optionally, in another embodiment, the method may include performing DCI size alignment after determining the DCI size. When no new DCI format is introduced for scheduling the two cells as described above, there is no need to modify the existing method. In the case of introducing a new DCI format, a new DCI size alignment method corresponding to the introduced new DCI format may be introduced, as described in the following embodiments.

[0056] Optionally, in another embodiment, the method may include determining, in a primary scheduling cell, a UE user-specific search space (USS) for detecting a DCI carried by a PDCCH. This embodiment may include various methods for determining the USS. One method includes determining the USS based on one of the first CIF or the second CIF in the DCI and performing PDCCH blind decoding in the determined USS. As an example, the USS may be determined based on the first CIF. As another example, the USS may be determined based on a CIF configured by higher layer signaling. Another method includes determining the USS based on both the first CIF and the second CIF in the DCI and performing PDCCH blind decoding in the determined USS. The blind detection complexity in the former method 1 is relatively low, while the scheduling flexibility in the latter method is relatively high. The DCI size in each USS may be determined by the cell corresponding to the CIF that determines the USS.

[0057] Optionally, in another embodiment, the method may include, in a carrier aggregation (CA) scenario, when the number of configured carriers is greater than the number of carriers supported by the UE report, determining the number of carriers with a certain subcarrier spacing (SCS) for determining Or This embodiment may include various methods for determining the number of SCSs. One method includes: scheduling two cells for 1 DCI, and when blind decoding the PDCCH is performed in the USSs determined by the first CIF and the second CIF, these two cells may count the number of SCSs corresponding to the primary scheduled cell as 2. Another method includes: scheduling two cells for 1, and when blind decoding the PDCCH is performed in the USS determined by one of the first CIF or the second CIF, these two cells count the number of SCSs corresponding to the primary scheduled cell as 1 or 2. For example, when counted as 1, blind decoding of the PDCCH is not performed in the USS determined by the other CIF; when counted as 2, blind decoding of the PDCCH with the DCI size determined by the cell corresponding to this CIF is performed in the USS determined by the other CIF. When counted as 2 cells, the blind decoding (BD) complexity remains unchanged, which may be equivalent to blind decoding of the USSs of both cells, and may be equivalent to counting the number of cells of the SCS corresponding to the primary scheduled cell when determining the scheduled cells during CA scaling.

[0058] In another embodiment, the present disclosure describes another method for using a single DCI including a single CIF as an indication for two cells based on a predefined configuration. This embodiment may solve at least some of the problems / difficulties discussed above regarding the existing system, and bring some beneficial effects. For example, according to the predefined configuration, the downlink shared channels of two cells are scheduled by a single CIF in the DCI, enabling flexible combination of the two cells. When the DCI size is determined, it can be ensured that the types of DCI sizes and the blind detection complexity do not exceed the thresholds specified in the prior art, and no additional complexity is introduced. The present invention can support the downlink traffic channel function of scheduling two cells by one DCI with maximum flexibility, improving system efficiency.

[0059] In a carrier aggregation (CA) scenario, a single DCI for two scheduled cells may be transmitted on the primary scheduled cell, which may be any one of the PCell, PSCell, or SCell, and the DCI may be carried by the PDCCH. The DCI may include a CIF indication that indicates one of the two scheduled cells. The other cell among the two scheduled cells may be indicated based on the CIF indication in the DCI through a predefined rule.

[0060] In one embodiment, the first cell is indicated by the DCI, and the second cell is determined according to the first cell by a predefined rule, including at least one of the following methods.

[0061] Reference Figure 7A, Method 1 may include scheduling a first cell according to the CIF value and scheduling a second cell according to another CIF with a value of CIF + 1. Figure 7A One or more CIF values 714 are shown, where each CIF value corresponds to one cell for single-cell scheduling 714 and two cells for two-cell scheduling 716. For example, CIF = 2 (717) corresponds to cell C for single-cell scheduling. In the case of two-cell scheduling, CIF = 2 corresponds to cell C indicated by CIF = 2 itself and cell D indicated by (CIF + 1) = 3. In one embodiment, when CIF + 1 is greater than the maximum allowable CIF value, modulo operation may be applied. For example, referring to Figure 7A in 718, when CIF = 7 and the maximum allowable CIF value is 7, the value 0 obtained by (CIF + 1) mod 8 corresponds to cell A.

[0062] Referring to Figure 7B , Method 2 may include scheduling a first cell according to the CIF and scheduling a second cell according to another CIF with a value of zero. Figure 7B One or more CIF values 724 are shown, where each value corresponds to one cell for single-cell scheduling 724 and two cells for two-cell scheduling 726. For example, CIF = 4 (728) corresponds to cell E for single-cell scheduling. In the case of two-cell scheduling, CIF = 4 corresponds to cell E indicated by CIF = 4 itself and cell A indicated by the CIF with a value of 0. In one embodiment, referring to Figure 7B in 727, when CIF = 0, only single-cell scheduling is allowed. In another embodiment, referring to Figure 7C in 737, when CIF = 0, two-cell scheduling may include cell A and another cell (e.g., cell F) configured by higher-layer signaling.

[0063] Referring to Figure 7D , Method 3 may include scheduling a first cell according to the CIF and scheduling a second cell according to another CIF configured by higher-layer signaling. Figure 7D One or more CIF values 744 are shown, where each value corresponds to one cell for single-cell scheduling 744 and two cells for two-cell scheduling 746. For example, CIF = 4 (748) corresponds to cell E for single-cell scheduling. In the case of two-cell scheduling, CIF = 4 corresponds to cell E indicated by CIF = 4 itself and cell B corresponding to CIF = 4 configured by higher-layer signaling.

[0064] Optionally, in another embodiment, higher-layer signaling may configure whether to schedule a single cell or two cells for a given DCI.

[0065] Optionally, in another embodiment, the method may include scheduling one of two cells via DCI. This embodiment may include various ways to implement that one DCI can be used to schedule one cell. One way may include making the CIF have a special value, for example but not limited to, the special value including non - numerical values, all "1", or all "0". Another way may include that all the independent indication fields of the second cell in the DCI can be all set to special values, for example but not limited to, the special value can be the same value for different independent indication fields, such as non - numerical values, all 0, all 1, or a value configured by higher - layer signaling. Optionally, the special values of different independent indication fields can be set independently.

[0066] Optionally, in another embodiment, the method may include determining the DCI size. For one or more shared indication fields, the cell with the largest size can be used to determine the DCI size. For example, the cell with the largest size among the valid cells in the dynamic combination can be used to determine the size of the field. One or more of the least significant bits (LSBs) of the fields of other cells can be valid, and the indication of one or more of the most significant bits (MSBs) can be ignored. For one or more independent indication fields, the method includes determining the DCI size of one DCI for scheduling two cells based on the combined size of one cell and other cells.

[0067] Optionally, in another embodiment, the method may include, after determining the DCI size, performing DCI size alignment. When no new DCI format is introduced for the above - mentioned scheduling of two cells, there is no need to modify the existing method. In the case of introducing a new DCI format, a new DCI size alignment method corresponding to the introduced new DCI format can be introduced, as described in the following embodiments.

[0068] Optionally, in another embodiment, the method may include determining the UE - specific search space (USS) for detecting the DCI carried by the PDCCH in the primary scheduling cell. This embodiment may include various methods for determining the USS. One method includes determining the USS based on the CIF in the DCI and performing PDCCH blind decoding in the determined USS. Another method includes determining the USS based on both the first cell indicated by the CIF in the DCI and the second cell predefined according to the first cell, and performing PDCCH blind decoding in the determined USS. The blind detection complexity in the first method above is relatively low, while the scheduling flexibility of the second method is relatively high. The second method has higher flexibility compared to the first method. The DCI size in each USS can be determined by the cell corresponding to the CIF that determines the USS.

[0069] Optionally, in another embodiment, the method may include, in a carrier aggregation (CA) scenario, when the number of configured carriers is greater than the number of carriers supported by the UE report, determining the number of carriers with a certain subcarrier spacing (SCS) for determining Or This embodiment may include various methods for determining the number of SCSs.

[0070] One method includes, for 1 DCI scheduling two cells, and when performing blind decoding of PDCCH in the USS determined by these two cells, these two cells may count the number of SCSs corresponding to the primary scheduling cell as 2 or 4. In one embodiment, when these two cells count the number of SCSs as 2, blind decoding of PDCCH may be performed in the USS determined by the second cell using the DCI size determined by the second cell. In another embodiment, when these two cells count the number of SCSs as 4, blind decoding of PDCCH may be performed in the USS determined by the second cell using the DCI size determined by these two cells.

[0071] Another method includes: for 1 DCI scheduling two cells, and performing PDCCH blind decoding in the USS determined by the CIF in this DCI, these two cells count the number of SCSs corresponding to the primary scheduling cell as 1 or 2. For example, when counted as 1, blind decoding of PDCCH is not performed in the USS determined by the second cell; when counted as 2, blind decoding of PDCCH is performed in the USS determined by the second cell using the DCI size determined by the corresponding cell of the second cell. When counted as 2 cells, the blind decoding (BD) complexity remains unchanged, which may be equivalent to blind decoding of the USSs of both cells, and may be equivalent to counting the number of all scheduled cells with the SCS corresponding to the primary scheduling cell when performing CA scaling.

[0072] In another embodiment, the present disclosure describes another method for configuring two cells to have the same CIF value and using a single DCI including a single CIF as an indication for the two cells. This embodiment may solve at least some of the problems / difficulties discussed above regarding the existing system, and bring certain technical benefits. For example, a single CIF in the DCI schedules the downlink shared channels of two cells according to the combination of two cells configured by higher layer signaling, realizing scheduling of these two cells according to a fixed combination of the two cells. When the DCI size is determined, it can be ensured that both the type of DCI size and the blind detection complexity do not exceed the thresholds specified in the prior art, and no additional complexity is introduced. The present invention can support the downlink traffic channel function of scheduling two cells with a single DCI with maximum flexibility, improving system efficiency.

[0073] In a carrier aggregation (CA) scenario, a single DCI for two scheduled cells can be sent on the primary scheduled cell, which can be any one of a PCell, a PSCell, or an SCell, and the DCI can be carried by a PDCCH. The DCI can include a CIF indication that indicates that the two cells are configured with the same CIF value by higher layer signaling.

[0074] Reference Figure 8 , the method can include, based on the two cells being configured with the same CIF by higher layer signaling, scheduling the two cells with a single CIF in the DCI. Figure 8 One or more CIF values 812 are shown, each of which corresponds to one or more cells 814 for scheduling. Some of the CIF values may indicate a single cell. For example, when the DCI includes CIF = 1 (817), it indicates single cell scheduling (i.e., cell B). Some of the CIF values may indicate two cells. For example, when the DCI includes CIF = 2 (818), it indicates two cell scheduling (i.e., cell C and cell D).

[0075] In one embodiment, for example, with reference to Figure 8 , cell A is configured for CIF = 0; cell B is configured for CIF = 1; cells C and D are configured for the same CIF = 2, which can be configured by higher layer signaling, such as but not limited to an RRC message.

[0076] Optionally, in one implementation, the method can include, when two cells are configured for the same CIF, scheduling a physical uplink shared channel (PUSCH) on one of the two cells, which can be performed by one of the following methods. Method 1 includes that, according to the configuration of higher layer signaling, only one of the two cells is used for the PUSCH. Method 2 includes that, according to the configuration of higher layer signaling, one of the two cells is configured not to be used for the uplink. Method 3 includes that, according to the configuration of higher layer signaling, both of the two cells are configured not to be used for the uplink.

[0077] Optionally, in another implementation, the higher layer signaling can configure whether a single cell or two cells should be scheduled for a given DCI.

[0078] Optionally, in another implementation, the method can include determining and configuring a first cell and a second cell for two cells configured with the same CIF, and determining the specific position of the independent indication field in the DCI and the correspondence between the two cells.

[0079] Optionally, in another embodiment, the method may include using DCI to schedule one of the two cells. This embodiment may include various methods that can be used to implement that DCI can be used to schedule a cell. One method may include that all independent indication fields for the second cell in the DCI may be set to special values, such as but not limited to, the special value may be the same value for different independent indication fields, such as non - numerical values, all 0s, all 1s, or values configured by higher - layer signaling. Optionally, specific values of different independent indication fields may be set independently.

[0080] Optionally, in another embodiment, the method may include determining the DCI size. For one or more shared indication fields, the cell with the largest size may be used to determine the DCI size. For example, the cell with the largest size among the valid cells in the dynamic combination may be used to determine the size of the field. One or more least - significant bits (LSBs) of the fields of other cells may be valid, and the indication of one or more most - significant bits (MSBs) may be ignored. For one or more independent indication fields, the method includes determining the DCI size of a DCI that schedules 1 of 2 cells through the combined size of one cell and other cells.

[0081] Optionally, in another embodiment, the method may include performing DCI size alignment after determining the DCI size. In the case where no new DCI format is introduced to schedule two cells, there is no need to modify the existing method. In the case where a new DCI format is introduced, a new DCI size alignment method corresponding to the introduced new DCI format may be introduced, as described in the following embodiments.

[0082] Optionally, in another embodiment, the method may include determining the UE - specific search space (USS) for detecting the DCI carried by the PDCCH in the primary scheduling cell. This embodiment may include various methods for determining the USS.

[0083] Method 1 includes determining the USS based on one of the two cells indicated by the CIF in the DCI, where PDCCH blind decoding is performed in the USS. In this method, blind decoding may be performed based on one cell in the USS and may be similar to the existing method. The blind decoding complexity can be reduced. In one embodiment, the method includes determining the aggregation level (AL) and candidates corresponding to one of the two cells. In another embodiment, the method includes determining the configuration with more candidates.

[0084] Method 2 includes determining a USS based on two cells indicated by the CIF in the DCI, where PDCCH blind decoding is performed in the USS. The method may include: when the first cell and the second cell have the same CIF, determining the USS based on the aggregation level (AL) and the union of candidates corresponding to both cells, where PDCCH blind decoding is performed in the USS. In this method, the total number of candidates corresponding to one DCI scheduling two cells may be equal to or less than the sum of the candidates of each of the two cells; and the blind decoding complexity may be the same (or similar) or reduced.

[0085] Method 3 includes determining a USS based on two cells indicated by the CIF in the DCI, where PDCCH blind decoding is performed in the USS. The method may include: when the first cell and the second cell have the same CIF, determining the USS based on each individual cell of the two cells, where PDCCH blind decoding is performed in the USS, and performing blind decoding in the individually determined USS based on the AL and the candidates corresponding to each individual cell of the two cells.

[0086] In the above three methods, Method 1 includes determining a USS based on the CIF in the DCI, where PDCCH blind decoding is performed in the USS; Method 2 includes determining the USS based on the AL and the union of candidates corresponding to two cells, where PDCCH blind decoding is performed in the USS; and Method 3 includes independently determining the USS based on each individual cell of the two cells, where PDCCH blind decoding is performed in the independently determined USS. In one implementation, the blind detection complexity in Method 1 is relatively low, and the scheduling flexibility of Method 3 is relatively high. The size of the DCI in each USS may be determined by the cell corresponding to the CIF that determines the USS.

[0087] Optionally, in another implementation, the method may include, in a carrier aggregation (CA) scenario, when the number of configured carriers is greater than the number of carriers supported by the UE report, determining the number of carriers with a certain subcarrier spacing (SCS) for determination Or This implementation may include various methods for determining the number of SCSs.

[0088] Method 1 includes scheduling two cells for one DCI and, when performing PDCCH blind decoding in the USS determined by one of the two cells, the two cells may count the number of SCSs corresponding to the primary scheduling cell as one. In one implementation, the method may perform PDCCH blind decoding in the USS determined according to one cell, thereby reducing blind decoding (BD).

[0089] Method 2 includes: when scheduling two cells with one DCI and performing blind decoding of PDCCH in the USS determined according to the union of the ALs and candidates of the two cells, the two cells count the number of SCSs corresponding to the primary scheduling cell as two. Method 2 may further include: when scheduling two cells with one DCI and performing blind decoding of PDCCH in the USS independently determined for each of the two cells, the two cells count the number of SCSs corresponding to the primary scheduling cell as two. In one implementation, the method may count the number of SCSs corresponding to the primary scheduling cell as two according to the larger BD. When the number of SCSs corresponding to the primary scheduling cell is counted as two, the BD complexity does not change, which may be similar to when performing carrier aggregation scaling and determining the scheduled cells, counting the number of cells with SCSs corresponding to the primary scheduling cell.

[0090] In another embodiment, the present disclosure describes another method that uses a single DCI including a single CIF as an indication for two cells based on configuring one cell to have more than one CIF value. This embodiment may solve at least some of the problems / difficulties discussed above regarding the existing system and bring certain technical benefits. For example, through a single CIF in the DCI, the downlink shared channels of two cells are scheduled according to the combination of two cells configured by higher layer signaling, achieving the scheduling of two cells according to a fixed combination of the two cells. Given the determined DCI size, it can be ensured that the types of DCI sizes and the blind detection complexity do not exceed the thresholds specified in the prior art and no additional complexity is introduced. The present invention can support the downlink traffic channel function of scheduling two cells with one DCI with maximum flexibility and improve system efficiency.

[0091] In the carrier aggregation (CA) scenario, a single DCI for two scheduled cells may be transmitted on the primary scheduling cell, which may be any one of the PCell, PSCell, or SCell, and the DCI may be carried by the PDCCH. The DCI may include a CIF indication that indicates that the two cells are configured by higher layer signaling to have more than one CIF value.

[0092] Optionally, in one embodiment, the method may include: configuring a cell with N CIF values and indicating single-cell scheduling or two-cell scheduling according to the CIF code point. In one embodiment, the method may support dynamic scheduling for a specific cell between single-cell scheduling and two-cell scheduling, which may increase the variety of DCI sizes. In another embodiment, for example and preferably, the first CIF value among the N CIF values of a cell may be used as the CIF value for single-cell scheduling, and the other CIF values except the first CIF value among the N CIF values may be used as the CIF values for two-cell scheduling.

[0093] Reference Figure 9A , one example includes N = 2 and one or more CIF values 912, each CIF value corresponding to one or more cells 914 for scheduling. For example but not limited to, cell A is configured with CIF = {0, 4}; cell B is configured with CIF = {1, 4}; cell C is configured with CIF = {2, 5}; and / or cell D is configured with CIF = {3, 5}. In one embodiment, when the DCI includes CIF = 4 (917), two-cell scheduling for cell A and cell B can be determined and executed.

[0094] Reference Figure 9B , another example includes N = 3 and one or more CIF values 922, each CIF value corresponding to one or more cells 924 for scheduling. For example but not limited to, cell A is configured with CIF = {0, 4, 6}; cell B is configured with CIF = {1, 4, 7}; cell C is configured with CIF = {2, 5, 6}; and / or cell D is configured with CIF = {3, 5, 7}. In one embodiment, when the DCI includes CIF = 6 (927), two-cell scheduling for cell A and cell C can be determined and executed.

[0095] Optionally, in one embodiment, the method may include, when a cell is configured with more than one CIF value, scheduling the Physical Uplink Shared Channel (PUSCH). The method includes that only the first CIF among the more than one CIF values is used to schedule the PUSCH, which may be equivalent to supporting single-cell scheduling for the uplink.

[0096] Optionally, in another embodiment, the higher layer signaling may configure whether a single cell or two cells should be scheduled for a given DCI. In one embodiment, a cell may be configured with a single CIF value, which is a unique CIF value different from all other units; then the cell can be used for single-cell scheduling. In another embodiment, single-cell scheduling and two-cell scheduling can coexist dynamically. For Figure 9AIn the example shown, the DCI can dynamically include CIF = 2 (918) to indicate single-cell scheduling (i.e., cell C); and the DCI can dynamically include CIF = 4 (917) to indicate two-cell scheduling (i.e., cells A and B). For Figure 9B In another example shown, the DCI can dynamically include CIF = 3 (928) to indicate single-cell scheduling (i.e., cell D); and the DCI can dynamically include CIF = 6 (927) to indicate two-cell scheduling (i.e., cells A and C).

[0097] Optionally, in another embodiment, the method may include determining and configuring a first cell and a second cell of two cells configured for the same CIF, and determining the specific position of the independent indication field in the DCI and the correspondence between the two cells.

[0098] Optionally, in another embodiment, the method may include scheduling one of the two cells via the DCI. This embodiment may include multiple methods that can be used to implement that the DCI can be used to schedule one cell. One method may include that all independent indication fields of the second cell in the DCI can be set to special values, for example but not limited to, the special value can be the same value for different independent indication fields, such as non-numeric, all 0s, all 1s, or a value configured by higher-layer signaling. Optionally, the special values of different independent indication fields can be set independently. Another method may include that the DCI includes a CIF value indicating single-cell scheduling.

[0099] Optionally, in another embodiment, the method may include determining the DCI size. This embodiment may include multiple methods that can be used to determine the DCI size.

[0100] Method 1 can be used for the case of N = 2. For one or more shared indication fields, the cell with the largest size can be used to determine the DCI size. For example, the cell with the largest size in the combination can be used to determine the size of the field. One or more least significant bits (LSBs) of the fields of other cells can be valid, and the indication of one or more most significant bits (MSBs) can be ignored. For one or more independent indication fields, the method includes determining the DCI size of one DCI for scheduling two cells through the combination of one cell and other cells.

[0101] Method 2 can be used for the case where N > 2. For example, when N = 3. For one or more shared indication fields, the cell with the largest size can be used to determine the DCI size. For example, the cell with the largest size among the valid cells in the configured combination can be used to determine the size of the field. One or more least significant bits (LSBs) of the fields of other cells can be valid, and the indication of one or more most significant bits (MSBs) can be ignored. For one or more independent indication fields, one implementation can include multiple methods. One method includes determining the DCI size of one DCI scheduling two cells through the combination of one cell and other cells with the largest size. In some cases, when the carrier combination of the two cells is dynamic, the DCI size of one DCI scheduling two cells can be determined by adding the largest size of the other cell and the size of this cell. Another method includes: the DCI size of one DCI scheduling two cells can be determined through the combination of the largest size of each bit field in the other cell and this cell. The latter method may result in a larger DCI size because each bit field is determined by the largest size of the other cell.

[0102] Optionally, in another embodiment, the method may include performing DCI size alignment if a DCI size threshold is exceeded after determining the DCI size. In the case where no new DCI format is introduced to schedule two cells, there is no need to modify the existing method. In the case where a new DCI format is introduced, the DL assignment of one cell may simultaneously have a DCI size for a DCI scheduling two cells and a legacy DCI size for a DCI scheduling one cell. The DCI for single-cell scheduling and two-cell scheduling may be sent dynamically, e.g., at the same time or at different times, and a new DCI format (e.g., DCI format 1_3) may be required to distinguish it from the legacy DCI format (e.g., DCI format 1_1 or DCI format 1_2). In one embodiment, the DCI size budget may be increased according to the new DCI format, or the DCI size alignment may be modified according to the new DCI format without increasing the DCI size budget. The DCI size budget may be determined by the UE's expectation to monitor PDCCH candidates for up to four DCI format sizes, where the up to four DCI format sizes include up to three DCI format sizes with a cyclic redundancy check (CRC) scrambled by the cell-radio network temporary identifier (C-RNTI) of each serving cell. In another embodiment, in the case where one DCI schedules two cells and the DCI size budget is not maintained, align DCI format 0_1 and format 1_1; in the case where DCI format 1_2 and DCI format 0_2 are configured, perform at least one of the following alignments: align DCI format 0_1, format 1_1, format 1_2, and format 0_2; or align DCI format 0_1, format 1_1, and the DCI scheduling two cells.

[0103] Optionally, in another embodiment, the method may include determining a UE user-specific search space (USS) for detecting a DCI (carried by the PDCCH) in the primary scheduling cell. This embodiment may include multiple methods for determining the USS.

[0104] Method 1 includes determining a USS based on at least one of two cells indicated by a CIF in DCI, where PDCCH blind decoding is performed in the USS. The method may also include determining an AL and a candidate for one of the two cells. In one embodiment, one of the two cells, such as the first cell or the second cell of the two cells, may be configured by higher layer signaling to determine the AL and the candidate. In another embodiment, the cell may be determined based on the larger number of candidates that this one of the two cells has. For example, referring to Figure 9A in 917, the DCI includes CIF = 4, which indicates two cells, cell A and cell B. When determining the USS for detecting DCI (carried by PDCCH) based on any of the two scheduled cells, the BD complexity may increase. In one embodiment, a new CIF value may result in adding a new USS.

[0105] Method 2 may include determining a USS for detecting DCI (carried by PDCCH) without increasing the blind decoding complexity. This embodiment may include various methods. One method includes, when one of the two cells has more than 1 CIF, determining the USS based on (n CI mod N CI ), where N CI is a predefined or configured value, and preferably an integer. For example but not limited to, N CI equals 4. Another method is, when one of the two cells has more than one CIF, determining the USS based on the CIF corresponding to single cell scheduling that schedules at least one of the first cell and the second cell. As an example, referring to Figure 9A in 917, the DCI includes CIF = 4, which indicates two cells, cell A and cell B. The corresponding CIF may be CIF = 0 corresponding to cell A, or CIF = 1 corresponding to cell B. As another example, referring to Figure 9A in 919, the DCI includes CIF = 5, which indicates two cells, cell C and cell D. The corresponding CIF may be CIF = 2 corresponding to cell C, or CIF = 3 corresponding to cell D.

[0106] Optionally, in another embodiment, the method may include, in a carrier aggregation (CA) scenario, when the number of configured carriers is greater than the number of carriers supported by the UE report, determining the number of carriers of a certain subcarrier spacing (SCS) for determining or This embodiment may include various methods for determining the number of SCSs.

[0107] Method 1 includes, for one DCI scheduling two cells, and when performing blind decoding of PDCCH in the USS determined by at least one of the two cells, the two cells can count the number of SCSs corresponding to the primary scheduled cell as two. In one embodiment, the two cells count the number of SCSs as two, which can be equivalent to performing blind decoding in the USS corresponding to one cell. In another embodiment, when counting the number of SCSs during CA scaling, the two scheduled cells are counted as two cells, and the corresponding number of SCSs is counted accordingly.

[0108] Method 2 includes, for one DCI scheduling two cells, and when performing blind decoding of PDCCH in the USS determined according to the union of the AL and the candidates of the two cells, the two cells count the number of SCSs corresponding to the primary scheduled cell as four. Method 2 may also include, for one DCI scheduling two cells, and when performing blind decoding of PDCCH in separate USSs based on the individual cells of the two cells, the two cells count the number of SCSs corresponding to the primary scheduled cell as four.

[0109] Method 3 includes, for one DCI scheduling two cells, and when performing blind decoding of PDCCH in the USS determined by the CIF in the DCI, the two cells count the number of SCSs corresponding to the valid CIF value. When counted as two cells, the blind decoding (BD) complexity remains unchanged, which can be equivalent to blind decoding of the USSs of both cells, and can be equivalent to counting the number of all primary scheduled cells of the SCSs corresponding to the primary scheduled cell when performing CA scaling.

[0110] The present disclosure describes methods, apparatuses, and computer-readable media for wireless communication. The present disclosure solves the problem of scheduling multiple cells using a single downlink control information (DCI). The methods, devices, and computer-readable media described in the present disclosure can promote the performance of wireless transmission between a user equipment and a base station, thereby improving efficiency and overall performance. The methods, devices, and computer-readable media described in the present disclosure can improve the overall efficiency of a wireless communication system.

[0111] References to features, advantages, or similar language throughout the specification do not imply that all features and advantages that can be realized by the present solution should or are included in any single implementation thereof. Instead, language referring to features and advantages is understood to mean that a particular feature, advantage, or characteristic described in connection with an embodiment is included in at least one embodiment of the present solution. Thus, throughout the specification, discussions of features and advantages and similar language may, but do not necessarily, refer to the same embodiment.

[0112] Moreover, the features, advantages, and characteristics of the present solution can be combined in one or more embodiments in any suitable manner. Based on the description herein, those of ordinary skill in the relevant art will recognize that the present solution can be implemented without one or more specific features or advantages of a particular embodiment. In other cases, additional features and advantages that may not be present in all embodiments of the present solution can be recognized in certain embodiments.

Claims

1. A method for wireless communication, comprising: scheduling at least one cell for a user equipment UE by using downlink control information DCI through the following steps: receiving, by the user equipment UE via a physical downlink control channel PDCCH, the downlink control information DCI, where the downlink control information DCI is used to schedule at least one physical downlink shared channel PDSCH on the at least one cell; wherein: the at least one cell includes a first cell and a second cell; the downlink control information DCI for scheduling the first cell and the second cell includes at least one of the following scheduling manners: scheduling the first cell and the second cell in a semi-static mode, wherein a cell combination of the first cell and the second cell is semi-statically configured through high-layer signaling; scheduling the first cell and the second cell in a dynamic mode, wherein the cell combination of the first cell and the second cell is dynamically indicated through the downlink control information DCI; scheduling the first cell and the second cell in a semi-dynamic mode, wherein the first cell and the second cell are scheduled by the downlink control information DCI such that the combination of the first cell and the second cell is one of the cell combinations semi-statically configured through high-layer signaling; scheduling the first cell and the second cell in a predefined mode, wherein the first cell is indicated by the downlink control information DCI, and the second cell is predefined based on the first cell, and the size of the DCI is determined in the following manner: for one or more independent indication fields in the DCI for the first cell and the second cell, the size of the one or more independent indication fields is determined based on the sum of the size of the first cell and the maximum size of other cells except the first cell in the at least one cell.

2. The method according to claim 1, wherein: the downlink control information DCI includes a carrier indication field CIF; and the first cell is indicated by the downlink control information DCI, and the second cell is predefined based on the first cell, including at least one of the following manners: scheduling the first cell according to the CIF value, and scheduling the second cell according to another CIF with a value of CIF + 1; scheduling the first cell according to the CIF value, and scheduling the second cell according to another CIF with a value of zero; scheduling the first cell according to the CIF value, and scheduling the second cell according to another CIF configured by the high-layer signaling.

3. The method according to claim 1, wherein: each of the first cell and the second cell is configured to correspond to at least one CIF value according to the CIF configuration; and the carrier indication field configuration includes at least one of the following configuration manners: each of the first cell and the second cell is configured with a CIF, and different cells are configured with different CIF values; Each of the first cell and the second cell is configured with a CIF, and different cells are allowed to have the same CIF value; Each of the first cell and the second cell is configured with a first CIF and a second CIF, where the first CIF is used for single-cell scheduling, and the second CIF is used for two-cell scheduling.

4. The method according to claim 3, wherein: In the case where the first cell and the second cell have the same CIF, schedule a physical uplink shared channel PUSCH on one cell according to at least one of the following methods: According to the configuration of the higher layer signaling, configure one of the first cell and the second cell for the physical uplink shared channel PUSCH; According to the configuration of the higher layer signaling, configure one of the first cell and the second cell not for the uplink; According to the configuration of the higher layer signaling, configure both the first cell and the second cell not for the uplink.

5. The method according to claim 1, wherein: The downlink control information DCI is used to schedule a single cell in the fallback scheduling mode through at least one of the following methods: In the downlink control information DCI, the first carrier indication field CIF and the second carrier indication field CIF are included, and the value of the first carrier indication field CIF is the same as the value of the second carrier indication field CIF; In the downlink control information DCI, the first carrier indication field CIF and the second carrier indication field CIF are included, and one of the first carrier indication field CIF and the second carrier indication field CIF includes a special value; The downlink control information DCI includes at least one independent indication field, and all the independent indication fields have special values.

6. The method according to claim 5, wherein: The special value includes at least one of the following values: non-numeric, all "0", all "1", and the value configured by the higher layer signaling.

7. The method according to claim 1, wherein: Execute downlink control information DCI size alignment according to at least one of the following methods: In the case where the downlink control information DCI schedules two cells and the size budget of the downlink control information DCI is not maintained, align DCI format 0_1 and DCI format 1_1; In the case where DCI format 1_2 and format 0_2 are configured, perform at least one of the following alignments: Align DCI format 0_1, format 1_1, format 1_2, and format 0_2; Align DCI format 0_1, format 1_1, and the downlink control information DCI that schedules two cells.

8. The method according to claim 1, wherein: Determine a user-specific search space USS specific to the user equipment UE for detecting the downlink control information DCI, which is carried by the physical downlink control channel PDCCH, through at least one of the following methods: Determine a user-specific search space USS based on one of the first cell and the second cell, wherein physical downlink control channel PDCCH blind decoding is performed in the USS; Determine the USS based on both the first cell and the second cell, wherein physical downlink control channel PDCCH blind decoding is performed in the USS; When the first cell and the second cell have the same CIF, determine the USS based on the aggregation level AL and the union of candidates corresponding to the first cell and the second cell, wherein physical downlink control channel PDCCH blind decoding is performed in the USS; In the case where one of the first cell and the second cell has more than one CIF, based on n CI modN CI determine USS, where N CI is a predefined value or a configured value; When one of the first cell and the second cell has more than one CIF, determine the USS based on the CIF corresponding to single-cell scheduling for scheduling at least one of the first cell and the second cell.

9. A method for wireless communication, comprising: Scheduling at least one cell for a user equipment UE by using downlink control information DCI through the following steps: The network base station sends the downlink control information DCI to the user equipment UE via a physical downlink control channel PDCCH, and the downlink control information DCI is used for scheduling at least one physical downlink shared channel PDSCH on the at least one cell; wherein: The at least one cell includes a first cell and a second cell; and The downlink control information DCI for scheduling the first cell and the second cell includes at least one of the following scheduling manners: Scheduling the first cell and the second cell in a semi-static mode, wherein the cell combination of the first cell and the second cell is semi-statically configured by high-layer signaling; Scheduling the first cell and the second cell in a dynamic mode, wherein the cell combination of the first cell and the second cell is dynamically indicated by the downlink control information DCI; Scheduling the first cell and the second cell in a semi-dynamic mode, wherein the downlink control information DCI schedules the first cell and the second cell such that the combination of the first cell and the second cell is one of the cell combinations semi-statically configured by high-layer signaling; Scheduling the first cell and the second cell in a predefined mode, wherein the first cell is indicated by the downlink control information DCI, and the second cell is predefined according to the first cell, and The size of the DCI is determined by the following method: for one or more independent indication fields in the DCI for the first cell and the second cell, determine the size of the one or more independent indication fields based on the sum of the size of the first cell and the maximum size of other cells except the first cell in the at least one cell.

10. The method according to claim 9, wherein: The downlink control information DCI includes a carrier indication field CIF; and The first cell is indicated by the downlink control information DCI, and the second cell is predefined according to the first cell, including at least one of the following manners: The first cell is selected according to the CIF value, and the second cell is scheduled according to another CIF with a value of CIF + 1; The first cell is scheduled according to the CIF value, and the second cell is scheduled according to another CIF with a value of zero; The first cell is scheduled according to the CIF value, and the second cell is scheduled according to another CIF configured by the high-layer signaling.

11. The method according to claim 9, wherein: Each of the first cell and the second cell is configured to correspond to at least one CIF value according to the CIF configuration; and The carrier indication field configuration includes at least one of the following configuration methods: Each of the first cell and the second cell is configured with a CIF, and different cells are configured with different CIF values; Each of the first cell and the second cell is configured with a CIF, and different cells are allowed to have the same CIF value; Each of the first cell and the second cell is configured with a first CIF and a second CIF, where the first CIF is used for single-cell scheduling, and the second CIF is used for two-cell scheduling.

12. The method according to claim 11, wherein: In the case where the first cell and the second cell have the same CIF, a physical uplink shared channel PUSCH on one cell is scheduled according to at least one of the following methods: According to the configuration of the high-layer signaling, one of the first cell and the second cell is configured for the physical uplink shared channel PUSCH; According to the configuration of the high-layer signaling, one of the first cell and the second cell is configured not to be used for the uplink; According to the configuration of the high-layer signaling, both the first cell and the second cell are configured not to be used for the uplink.

13. The method according to claim 9, wherein: The downlink control information DCI is used to schedule a single cell in the fallback scheduling mode by at least one of the following methods: In the downlink control information DCI, the first carrier indication field CIF and the second carrier indication field CIF are included, where the value of the first carrier indication field CIF is the same as the value of the second carrier indication field CIF; In the downlink control information DCI, the first carrier indication field CIF and the second carrier indication field CIF are included, where one of the first carrier indication field CIF and the second carrier indication field CIF includes a special value; The downlink control information DCI includes at least one independent indication field, where all the independent indication fields have special values.

14. The method according to claim 13, wherein: The special value includes at least one of the following values: non-numerical value, all "0", all "1", and a value configured by the high-layer signaling.

15. The method according to claim 9, wherein: The downlink control information DCI size alignment is performed according to at least one of the following methods: When the downlink control information DCI schedules two cells and the size budget of the downlink control information DCI is not maintained, align DCI format 0_1 and DCI format 1_1; When DCI format 1_2 and format 0_2 are configured, perform at least one of the following alignments: Align DCI format 0_1, format 1_1, format 1_2, and format 0_2; Align DCI format 0_1, format 1_1, and the downlink control information DCI that schedules two cells.

16. The method according to claim 9, wherein: Determine a user-specific search space USS specific to a user equipment UE for detecting downlink control information DCI carried by a physical downlink control channel PDCCH by at least one of the following: Based on one of the first cell and the second cell, determine a user-specific search space USS, where blind decoding of the physical downlink control channel PDCCH is performed in the USS; Based on both the first cell and the second cell, determine a USS, where blind decoding of the physical downlink control channel PDCCH is performed in the USS; When the first cell and the second cell have the same CIF, based on the aggregation level AL and the union of candidates corresponding to the first cell and the second cell, determine a USS, where blind decoding of the physical downlink control channel PDCCH is performed in the USS; In the case where one of the first cell and the second cell has more than one CIF, based on n CI modN CI determine the USS, where N CI is a predefined value or a configured value; When one of the first cell and the second cell has more than one CIF, based on the CIF corresponding to single-cell scheduling that schedules at least one of the first cell and the second cell, determine a USS.

17. A wireless communication device, comprising a processor and a memory, wherein, The processor is configured to read code from the memory and execute the method according to any one of claims 1 to 16.

18. A computer program product, comprising computer-readable program medium code stored thereon, which when executed by a processor, causes the processor to execute the method according to any one of claims 1 to 16.

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