Carrier aggregation with variable transmission duration

Abstract

A method for a user equipment (UE) for constructing a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook. The method includes: receiving a physical downlink control channel (PDCCH) conveying corresponding downlink control information (DCI) formats, wherein each DCI format includes a counter field and a slot offset field; receiving a physical downlink data channel (PDSCH) conveying a data transmission block; detecting the DCI format configuring the received PDSCH; determining a position of a HARQ-ACK bit in the HARQ-ACK codebook based on a value of the slot offset field and a value of the counter field in each detected DCI format; determining a time unit for transmitting the HARQ-ACK codebook based on the value of the slot offset field in each detected DCI format; and transmitting the HARQ-ACK codebook.

Description

Technical Field

[0001] The present application relates generally to wireless communication systems and more particularly to supporting transmissions with variable durations across different cells. Background Art

[0002] User equipment (UE), often referred to as a terminal or mobile station, can be fixed or mobile and can be a mobile phone, personal computer, or automated device. A gNB is typically a fixed station and can also be referred to as a base station, access point, or other equivalent terms. A communication system includes a downlink (DL), which refers to transmissions from a base station or one or more transmission points to a UE, and an uplink (UL), which refers to transmissions from a UE to a base station or to one or more reception points. Summary of the Invention

[0003] Technical issues

[0004] In order to support the next generation communication system, it is necessary to improve the carrier aggregation operation according to the LTE / LTE-A communication system. In order to enhance the carrier aggregation process, the carrier aggregation of the next generation communication system should support the aggregation of different carrier types.

[0005] Solution

[0006] The present disclosure relates to a quasi-5th generation (5G) or 5G communication system to be provided for supporting higher data rates than 4th generation (4G) communication systems, such as Long Term Evolution (LTE). The present disclosure relates to implementing multiplexing of physical downlink control channel (PDCCH) transmissions over a system bandwidth (BW) to UEs with different BW reception capabilities; implementing carrier aggregation (CA) operations between carriers supporting physical downlink shared channel (PDSCH) transmissions of different durations; determining a hybrid automatic repeat request acknowledgment (HARQ-ACK) codebook for CA operations between cells (having different durations for corresponding PDSCH transmissions); supporting simultaneous transmissions from a UE on one or more first cells using a first duration and on one or more second cells using a second duration; designing a transmission power control process for overlapping transmissions from the UE on one or more first cells using the first duration and on one or more second cells using the second duration; defining a prioritization mechanism for power allocation from the UE to various signaling types using overlapping transmissions on one or more first cells using the first duration and on one or more second cells using the second duration; and a power allocation method defined for a UE when the UE needs to simultaneously support multiple traffic services with different reception reliability requirements.

[0007] In one embodiment, a UE is provided. The UE includes a transceiver configured to: receive a PDCCH that conveys a corresponding downlink control information (DCI) format, wherein each DCI format includes a counter field and a slot offset field; and receive a PDSCH that conveys a data transmission block. The UE also includes: a decoder configured to detect the DCI format that configures PDSCH reception; and a controller configured to determine the position of the HARQ-ACK bit in the HARQ-ACK codebook based on the value of the slot offset field and the value of the counter field in each detected DCI format, and determine the time unit for sending the HARQ-ACK codebook based on the value of the slot offset field in each detected DCI format. The UE also includes a transceiver further configured to send the HARQ-ACK codebook.

[0008] In another embodiment, a base station is provided. The base station includes a transceiver configured to: transmit a PDCCH that conveys a corresponding downlink control information (DCI) format, wherein each DCI format includes a counter field and a slot offset field; and transmit a PDSCH configured by the DCI format and conveying a data transmission block. The base station also includes a controller configured to determine a position of a HARQ-ACK bit in a HARQ-ACK codebook based on a value of the slot offset field and a value of the counter field in each transmitted DCI format, and to determine a time unit for receiving the HARQ-ACK codebook based on a value of the slot offset field in each transmitted DCI format, wherein the transceiver is further configured to receive the HARQ-ACK codebook.

[0009] In another embodiment, a method for a UE to construct a HARQ-ACK codebook is provided. The method includes: receiving a PDCCH conveying a corresponding DCI format, wherein each DCI format includes a counter field and a slot offset field; receiving a PDSCH conveying a data transmission block; detecting a DCI format configuring PDSCH reception; determining a position of a HARQ-ACK bit in the HARQ-ACK codebook based on a value of the slot offset field and a value of the counter field in each detected DCI format, and determining a time unit for transmitting the HARQ-ACK codebook based on a value of the slot offset field in each detected DCI format; and transmitting the HARQ-ACK codebook.

[0010] Those skilled in the art can easily understand other technical features from the following drawings, descriptions and appended claims.

[0011] Before proceeding to the following detailed description, it may be helpful to provide definitions of certain words and phrases used throughout this patent document. The term "coupled" and its derivatives refer to any direct or indirect communication between two or more elements, regardless of whether those elements are in physical contact with each other. The terms "transmit / send," "receive," and "communicate," and their derivatives, encompass both direct and indirect communication. The terms "include," "comprise," and their derivatives, mean to include, but are not limited to. The term "or" is inclusive, meaning and / or. The phrase "associated with," and its derivatives, means to include, be included within, be interconnected with, contain, be contained within, be connected to or connected with, be connected to or connected with, be communicable with, collaborate with, be interleaved, be juxtaposed, be close to, be bound to or bound with, have, have the property of, have a relationship with, or have a relationship with, etc. The term "controller" means any device, system, or portion thereof that controls at least one operation. Such a controller may be implemented using hardware, a combination of hardware and software, and / or firmware. The functionality associated with any particular controller may be centralized or distributed, whether local or remote. The phrase "at least one of" when used with a list of items means that different combinations of one or more of the listed items may be used, and that only one item from the list may be required. For example, "at least one of A, B, and C" includes any of the following combinations: A; B; C; A and B; A and C; B and C; and A, B, and C.

[0012] In addition, the various functions described below can be implemented or supported by one or more computer programs, each of which is formed by a computer-readable program code and embodied in a computer-readable medium. The terms "application" and "program" refer to one or more computer programs, software components, instruction sets, programs, functions, objects, categories, instances, related data, or parts thereof that are suitable for implementation with appropriate computer-readable program code. The phrase "computer-readable program code" includes any type of computer code, including source code, object code, and executable code. The phrase "computer-readable medium" includes any type of medium that can be accessed by a computer, such as a read-only memory (ROM), a random access memory (RAM), a hard drive, a compact disc (CD), a digital video disc (DVD), or any other type of memory. "Non-transient" computer-readable media excludes wired, wireless, optical, or other communication links that transmit temporary electrical signals or other signals. Non-transient computer-readable media include media that can permanently store data and media that can store and subsequently rewrite data, such as rewritable optical discs or erasable memory devices.

[0013] Definitions for certain other words and phrases are provided throughout this patent document. Those of ordinary skill in the art should understand that in many, if not most, instances, such definitions apply to prior as well as future uses of such defined words and phrases.

[0014] The aspects, features and advantages of the present disclosure will be readily understood from the following detailed description simply by describing a number of specific embodiments and implementations (including the best mode contemplated for carrying out the present disclosure). The present disclosure is also capable of other and different embodiments, and several of its details may be modified in various obvious respects without departing from the spirit and scope of the present disclosure. Therefore, the drawings and description should be regarded as illustrative in nature and not restrictive. The present disclosure is shown by way of example and not by way of limitation in the figures of the accompanying drawings.

[0015] Hereinafter, both frequency division duplex (FDD) and time division duplex (TDD) are considered as duplexing methods for DL ​​and UL signaling.

[0016] Although the following exemplary descriptions and embodiments employ orthogonal frequency division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA), the present disclosure may be extended to other OFDM-based transmission waveforms or multiple access schemes, such as filtered OFDM (F-OFDM) or OFDM with a zero cyclic prefix.

[0017] The present disclosure encompasses several components that may be used in conjunction or combination with each other or that may operate as standalone solutions.

[0018] Beneficial effects

[0019] According to an embodiment of the present invention, resource sharing based on a control resource set (CORESET) and individual configuration of control channel monitoring periodicity for each CORESET can be implemented.

[0020] According to an embodiment of the present invention, the power sharing mechanism can also be implemented in the case of different TTIs and HARQ-ACK feedback of carriers with different parameter sets. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, wherein like reference numerals represent like parts:

[0022] Figure 1 An exemplary wireless network according to an embodiment of the present disclosure is shown;

[0023] Figure 2 An exemplary gNB according to an embodiment of the present disclosure is shown;

[0024] Figure 3An exemplary UE according to an embodiment of the present disclosure is shown;

[0025] Figure 4A shows a high-level diagram of an orthogonal frequency division multiple access transmission path according to an embodiment of the present disclosure;

[0026] Figure 4B shows a high-level diagram of an orthogonal frequency division multiple access receive path according to an embodiment of the present disclosure;

[0027] Figure 5 An exemplary DL slot structure for PDSCH transmission or PDCCH transmission according to an embodiment of the present disclosure is shown;

[0028] Figure 6 An exemplary UL slot structure for PUSCH transmission or PUCCH transmission according to an embodiment of the present disclosure is shown;

[0029] Figure 7 An exemplary encoding process for a DCI format according to an embodiment of the present disclosure is shown;

[0030] Figure 8 An exemplary decoding process of a DCI format for use with a UE according to an embodiment of the present disclosure is shown;

[0031] Figure 9 An exemplary division of a first BW into a first BW portion for PDCCH transmission to a first UE of a first UE category and a second BW portion for PDCCH transmission to a second UE of a second UE category according to an embodiment of the present disclosure is shown;

[0032] Figure 10 An exemplary process for allocating multiple PDCCH candidates (PDCCHcandidate) from a gNB to a UE in a first BW portion of a system BW over a first number of symbols and in a second BW portion over a second number of symbols according to an embodiment of the present disclosure is shown;

[0033] Figure 11 An exemplary process of the operation of the counter DAI field, the total DAI field, and the HARQ-ACK transmission slot offset field in the DCI format for scheduling PDSCH transmissions with the same duration of one slot on corresponding cells according to an embodiment of the present disclosure is shown;

[0034] Figure 12 An exemplary operation of a counter DAI field, a total DAI field, and a HARQ-ACK transmission slot offset field in a DL DCI format for scheduling in different cells, conveyed at different time instances via PDCCH transmission, according to an embodiment of the present disclosure is shown;

[0035] Figure 13 An exemplary determination of a HARQ-ACK codebook using a HARQ-ACK mapping field by a UE configured for DL ​​CA operation according to an embodiment of the present disclosure is shown;

[0036] Figure 14 An exemplary process for a UE configured with DL CA operation on three cells to transmit HARQ-ACK information for multiple DL HARQ processes per cell according to an embodiment of the present disclosure is shown;

[0037] Figure 15 It shows that when the first time slot i1 and the second time slot i2 start at the same time and i1=P·i2 according to an embodiment of the present disclosure, the UE determines that cells and in the second time slot i2+j,0≤j≤P-1 An exemplary method for determining the PUSCH transmission power on a cell;

[0038] Figure 16 The PUSCH transmission power in the first time slot i1 according to the embodiment of the present disclosure is shown when the time slot i1 and the time slot i2 start at the same time and i1=P·i2. Example total PUSCH transmission power on cells and in the second time slots i2 and i2+1 Total PUSCH transmission power on the cell;

[0039] Figure 17 It shows that when the first time slot i1 and the second time slot i2 start at the same time and i1=P·i2 according to an embodiment of the present disclosure, the UE determines that cells and in the second time slot i2+j,0≤j≤P-1 Another exemplary method for PUSCH transmission power on a cell;

[0040] Figure 18 It shows that when the time slot i1 and the time slot i2 start at the same time and i1=P·i2, in the first time slot i1, according to an embodiment of the present disclosure, Example total PUSCH transmission power on cells and in the second time slots i2 and i2+1 Total PUSCH transmission power on the cell;

[0041] Figure 19 It shows that when the first time slot i1 and the second time slot i2 start at the same time and i1=P·i2 according to an embodiment of the present disclosure, the UE determines that cells and in the second time slot i2+j,0≤j≤P-1 Another exemplary method for determining the PUSCH transmission power on a cell;

[0042] Figure 20 It shows that when the time slot i1 and the time slot i2 start at the same time and i1=P·i2, in the first time slot i1, according to an embodiment of the present disclosure, Example total PUSCH transmission power on cells and in the second time slots i2 and i2+1 Total PUSCH transmission power on the cell;

[0043] Figure 21 shows an exemplary power allocation from a UE to different traffic types according to an embodiment of the present disclosure;

[0044] Figure 22 shows an exemplary determination by a UE of available transmission power at time T when the UE determines the total power of all previous transmissions before the power of a later transmission according to an exemplary embodiment of the present disclosure; and

[0045] Figure 23 An exemplary determination of available transmission power at time T by a UE is shown when the UE does not determine the total power of all previous transmissions before the power of a later transmission according to exemplary embodiments of the present disclosure. DETAILED DESCRIPTION

[0046] Discussed below Figures 1 to 23 The various embodiments used to describe the principles of the present disclosure in this patent document are only for illustration and should not be interpreted in any way as limiting the scope of the present disclosure. Those skilled in the art will understand that the principles of the present disclosure can be implemented in any appropriately arranged system or device.

[0047] The following documents and standard descriptions are hereby incorporated by reference into the present disclosure as if fully set forth herein: 3GPP TS 36.211 v13.2.0, "E-UTRA, Physical channels and modulation" (REF1); 3GPP TS 36.212 v13.2.0, "E-UTRA, Multiplexing and Channel coding" (REF2); 3GPP TS 36.213 v13.2.0, "E-UTRA, Physical Layer Procedures" (REF3); 3GPP TS 36.321 v13.2.0, "E-UTRA, Medium Access Control (MAC) protocol specification" (REF4); and 3GPP TS 36.331 v13.2.0, “E-UTRA, Radio Resource Control (RRC) Protocol Specification” (REF5).

[0048] To meet the increasing demand for wireless data traffic since the deployment of 4G communication systems, efforts have been made to develop an improved 5G or quasi-5G communication system. Therefore, 5G or quasi-5G communication systems are also called "beyond 4G networks" or "post-LTE systems."

[0049] 5G communication systems are expected to be implemented in higher-frequency (millimeter wave) bands (e.g., the 60 GHz band) to achieve higher data rates. To reduce radio wave propagation losses and expand transmission coverage, 5G communication systems are exploring technologies such as beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and large antennas.

[0050] In addition, in 5G communication systems, development is being carried out for system network improvements based on advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communications, wireless backhaul communications, mobile networks, collaborative communications, coordinated multi-point (CoMP) transmission and reception, interference suppression and cancellation, etc.

[0051] In 5G systems, hybrid frequency shift keying with quadrature amplitude modulation (FQAM) and sliding window superposition coding (SWSC) have been developed as adaptive modulation and coding (AMC) technologies, as well as filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA) and sparse code multiple access (SCMA) as advanced access technologies.

[0052] the following Figures 1 to 4B Various embodiments are described that are implemented in a wireless communication system and using OFDM or OFDMA communication techniques. Figures 1 to 3 The description is not intended to imply physical or architectural limitations to the manner in which different embodiments may be implemented. Different embodiments of the disclosure may be implemented in any suitably arranged communications system.

[0053] Figure 1 An exemplary wireless network 100 is shown in accordance with an embodiment of the present disclosure. Figure 1 The embodiment of the wireless network 100 shown is for illustration purposes only. Other embodiments of the wireless network 100 may be used without departing from the scope of the present disclosure.

[0054] like Figure 1 As shown, wireless network 100 includes gNB 101, gNB 102, and gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one network 130, such as the Internet, a proprietary Internet Protocol (IP) network, or other data network.

[0055] gNB 102 provides wireless broadband access to network 130 for a plurality of first user equipment (UEs) located within gNB 102's coverage area 120. The plurality of first UEs include: UE 111, which may be located in a small business (SB); UE 112, which may be located in an enterprise (E); UE 113, which may be located in a WiFi hotspot (HS); UE 114, which may be located in a first residence (R); UE 115, which may be located in a second residence (R); and UE 116, which may be a mobile device (M) such as a cellular phone, wireless laptop, wireless PDA, etc. gNB 103 provides wireless broadband access to network 130 for a plurality of second UEs located within gNB 103's coverage area 125. The plurality of second UEs include UE 115 and UE 116. In some embodiments, one or more of gNBs 101 to 103 may communicate with each other and with UEs 111 to 116 using 5G, LTE, LTE-A, WiMAX, WiFi, or other wireless communication technologies.

[0056] Depending on the network type, the term "base station" or "BS" can refer to any component (or collection of components) configured to provide wireless access to a network, such as a transmission point (TP), a transmit-receive point (TRP), an enhanced base station (eNodeB or gNB), a gNB, a macrocell, a femtocell, a WiFi access point (AP), or other wirelessly enabled device. A base station can provide wireless access according to one or more wireless communication protocols, such as 5G 3GPP New Radio Interface / Access (NR), Long Term Evolution (LTE), LTE-Advanced (LTE-A), High Speed ​​Packet Access (HSPA), Wi-Fi 802.11a / b / g / n / ac, etc. For convenience, the terms "eNodeB" and "gNB" are used in this patent document to refer to network infrastructure components that provide wireless access to remote terminals. In addition, depending on the network type, other well-known terms may be used instead of "user equipment" or "UE," such as "mobile station," "subscriber station," "remote terminal," "wireless terminal," or "user device." For convenience, the terms "user equipment" and "UE" are used in this patent document to refer to a remote wireless device that wirelessly accesses a gNB, regardless of whether the UE is a mobile device (such as a mobile phone or smartphone) or what is generally considered a fixed device (such as a desktop computer or vending machine).

[0057] Dashed lines represent the approximate extents of coverage areas 120 and 125, which are shown as generally circular for purposes of illustration and explanation only. It should be clearly understood that coverage areas associated with a gNB, such as coverage areas 120 and 125, may have other shapes, including irregular shapes, depending on the configuration of the gNB and variations in the radio environment associated with natural and man-made obstacles.

[0058] As described in more detail below, one or more of UEs 111-116 include circuitry, programming, or a combination thereof for efficient CSI reporting on uplink channels in an advanced wireless communication system. In certain embodiments, one or more of gNBs 101-103 include circuitry, programming, or a combination thereof for receiving efficient CSI reporting on uplink channels in an advanced wireless communication system.

[0059] Although Figure 1 One example of a wireless network 100 is shown, but may be Figure 1Various changes may be made. For example, wireless network 100 may include any number of gNBs and any number of UEs in any suitable arrangement. In addition, gNB 101 may communicate directly with any number of UEs and provide those UEs with wireless broadband access to network 130. Similarly, each gNB 102-103 may communicate directly with network 130 and provide the UEs with direct wireless broadband access to network 130. Furthermore, gNBs 101, 102, and / or 103 may provide access to other or additional external networks, such as an external telephone network or other type of data network.

[0060] Figure 2 An exemplary gNB 102 according to an embodiment of the present disclosure is shown. Figure 2 The embodiment of the gNB 102 shown is for illustration purposes only and Figure 1 gNBs 101 and 103 may have the same or similar configurations. However, gNBs have a wide variety of configurations, and Figure 2 The scope of this disclosure is not limited to any particular implementation of the gNB.

[0061] like Figure 2 As shown, gNB 102 includes multiple antennas 205a through 205n, multiple RF transceivers 210a through 210n, transmit (TX) processing circuitry 215, and receive (RX) processing circuitry 220. gNB 102 also includes a controller / processor 225, memory 230, and a backhaul or network interface 235.

[0062] RF transceivers 210a to 210n receive input RF signals from antennas 205a to 205n, such as signals transmitted by UEs in network 100. RF transceivers 210a to 210n downconvert the input RF signals to generate IF or baseband signals. The IF or baseband signals are sent to RX processing circuitry 220, which generates processed baseband signals by filtering, decoding, and / or digitizing the baseband or IF signals. RX processing circuitry 220 sends the processed baseband signals to controller / processor 225 for further processing.

[0063] In some embodiments, the RF transceivers 210 a to 210 n are capable of transmitting a PDCCH conveying a corresponding DCI format (where each DCI format includes a counter field and a slot offset field), and are capable of transmitting a PDSCH configured by the DCI format and conveying a data transmission block, and receiving a HARQ-ACK codebook based on the value of the slot offset field and the value of the counter field in each transmitted DCI format at a time unit determined based on the value of the slot offset field in each transmitted DCI format.

[0064] In some embodiments, the RF transceivers 210a to 210n are capable of transmitting a first PDCCH in a first time instance and a second PDCCH in a second time instance, and wherein the value of the slot offset field represents the same time unit in both the first DCI format conveyed by the first PDCCH and the second DCI format conveyed by the second PDCCH.

[0065] In some embodiments, the RF transceivers 210a to 210n are capable of transmitting a first PDCCH in a first time instance and transmitting a second PDCCH in a second time instance, and wherein the value of the counter field in the DCI format conveyed by the first PDCCH or the second PDCCH indicates a single counter that is updated in both the first DCI format conveyed by the first PDCCH and the second DCI format conveyed by the second PDCCH.

[0066] In such embodiments, the DCI format configures the transmission of multiple PDSCHs, and the value of the counter field is increased according to the number of PDSCHs.

[0067] In some embodiments, the RF transceivers 210a to 210n are capable of sending first configuration information for a first number of HARQ processes for data transmission blocks conveyed by PDSCH transmission in a first cell, and sending second configuration information for a second number of HARQ processes for data transmission blocks conveyed by PDSCH transmission in a second cell.

[0068] In some embodiments, the RF transceivers 210a to 210n are capable of sending a first PDCCH in a first time-frequency resource and a second PDCCH in a second time-frequency resource, wherein the second time resource is different from the first time resource, and wherein the first time resource used for PDSCH transmission is adjacent to the last time resource of the first time-frequency resource in a subset of the first time-frequency resource and adjacent to the last time resource of the second time-frequency resource in a subset of the second time-frequency resource.

[0069] In some embodiments, RF transceivers 210a to 210n can transmit a first PDCCH in a first time-frequency resource at a first time instance and a second PDCCH in a second time-frequency resource at a second time instance.

[0070] The TX processing circuit 215 receives analog or digital data (such as voice data, network data, email, or interactive video game data) from the controller / processor 225. The TX processing circuit 215 encodes, multiplexes, and / or digitizes the output baseband data to generate processed baseband or IF signals. The RF transceivers 210a to 210n receive the output processed baseband or IF signals from the TX processing circuit 215 and up-convert the baseband or IF signals into RF signals that are transmitted via the antennas 205a to 205n.

[0071] The controller / processor 225 may include one or more processors or other processing devices that control the overall operation of the gNB 102. For example, the controller / processor 225 may control the reception of forward channel signals and the transmission of reverse channel signals by the RF transceivers 210a to 210n, the RX processing circuitry 220, and the TX processing circuitry 215 in accordance with well-known principles. The controller / processor 225 may also support additional functionality, such as more advanced wireless communication functionality. For example, the controller / processor 225 may support beamforming or directional routing operations, in which the output signals from the multiple antennas 205a to 205n are weighted differently to effectively steer the output signals in a desired direction. The controller / processor 225 may support any of a wide variety of other functions within the gNB 102.

[0072] In some embodiments, controller / processor 225 includes at least one microprocessor or microcontroller. As described in more detail below, gNB 102 may include circuitry, programming, or a combination thereof for processing uplink and / or downlink channels. For example, controller / processor 225 may be configured to execute one or more instructions stored in memory 230, which may cause the controller / processor to process signals.

[0073] The controller / processor 225 is also capable of executing programs and other processes, such as the OS, that reside in the memory 230. The controller / processor 225 can move data into or out of the memory 230 as required by the executing process.

[0074] The controller / processor 225 is also coupled to a backhaul or network interface 235. The backhaul or network interface 235 allows the gNB 102 to communicate with other devices or systems via a backhaul connection or via a network. The interface 235 may support communication via any suitable wired or wireless connection. For example, when the gNB 102 is implemented as part of a cellular communication system (such as one that supports 5G, LTE, or LTE-A), the interface 235 may allow the gNB 102 to communicate with other gNBs via a wired or wireless backhaul connection. When the gNB 102 is implemented as an access point, the interface 235 may allow the gNB 102 to communicate via a wired or wireless local area network or via a wired or wireless connection to a larger network (such as the Internet). The interface 235 includes any suitable structure that supports communication via a wired or wireless connection, such as an Ethernet or RF transceiver.

[0075] In some embodiments, the controller / processor 225 can determine the position of a hybrid automatic repeat request acknowledgement (HARQ-ACK) bit in a HARQ-ACK codebook based on the value of the slot offset field and the value of the counter field in each transmitted DCI format, and determine the time unit for receiving the HARQ-ACK codebook based on the value of the slot offset field in each transmitted DCI format.

[0076] In such embodiments, the DCI format configures the transmission of multiple PDSCHs, and the value of the counter field is increased according to the number of PDSCHs.

[0077] Memory 230 is coupled to controller / processor 225. A portion of memory 230 may include RAM, and another portion of memory 230 may include flash memory or other ROM.

[0078] Although Figure 2 An example of a gNB 102 is shown, but may be Figure 2 For example, gNB 102 may include any number of Figure 2 As a specific example, the access point may include multiple interfaces 235, and the controller / processor 225 may support routing functionality for routing data between different network addresses. As another specific example, although shown as including a single instance of the TX processing circuitry 215 and a single instance of the RX processing circuitry 220, the gNB 102 can include multiple instances of each (such as one instance per RF transceiver). Additionally, Figure 2 Various components in the diagram may be combined, further subdivided, or omitted, and additional components may be added according to specific needs.

[0079] Figure 3An exemplary UE 116 is shown in accordance with an embodiment of the present disclosure. Figure 3 The embodiment of UE 116 shown is for illustration purposes only and Figure 1 UEs 111 to 115 may have the same or similar configurations. However, UEs have a wide variety of configurations, and Figure 3 The scope of this disclosure is not limited to any particular implementation of the UE.

[0080] like Figure 3 As shown, UE 116 includes an antenna 305, a radio frequency (RF) transceiver 310, a TX processing circuit 315, a microphone 320, and a receive (RX) processing circuit 325. UE 116 also includes a speaker 330, a processor 340, an input / output (I / O) interface (IF) 345, a touch screen 350, a display 355, and a memory 360. The memory 360 includes an operating system (OS) 361 and one or more applications 362.

[0081] RF transceiver 310 receives an incoming RF signal from antenna 305, transmitted by a gNB of network 100. RF transceiver 310 downconverts the incoming RF signal to generate an intermediate frequency (IF) or baseband signal. The IF or baseband signal is sent to RX processing circuitry 325, which generates a processed baseband signal by filtering, decoding, and / or digitizing the baseband or IF signal. RX processing circuitry 325 sends the processed baseband signal to speaker 330 (e.g., for voice data) or to processor 340 for further processing (e.g., for web browsing data).

[0082] In some embodiments, the RF transceiver 310 is capable of receiving a PDCCH conveying a corresponding DCI format (wherein each DCI format includes a counter field and a slot offset field), and receiving a PDSCH conveying a data transmission block, determining a position of a HARQ-ACK bit in the HARQ-ACK codebook based on a value of the slot offset field and a value of the counter field in each detected DCI format, determining a time unit for sending the HARQ-ACK codebook based on a value of the slot offset field in each detected DCI format, and sending the HARQ-ACK codebook based on the value of the slot offset field.

[0083] In some embodiments, the RF transceiver 310 is capable of receiving a first PDCCH in a first time instance and a second PDCCH in a second time instance, and wherein the value of the slot offset field represents the same time unit in both the first DCI format conveyed by the first PDCCH and the second DCI format conveyed by the second PDCCH.

[0084] In some embodiments, the RF transceiver 310 is capable of receiving a first PDCCH in a first time instance and receiving a second PDCCH in a second time instance, and wherein the value of the counter field in the DCI format conveyed by the first PDCCH or the second PDCCH indicates a single counter that is updated in both the first DCI format conveyed by the first PDCCH and the second DCI format conveyed by the second PDCCH.

[0085] In such embodiments, the DCI format configures reception of multiple PDSCHs, and the value of the counter field is increased according to the number of PDSCHs.

[0086] In some embodiments, the RF transceiver 310 is capable of receiving first configuration information for a first number of HARQ processes for data transmission blocks delivered by PDSCH reception in a first cell, and receiving second configuration information for a second number of HARQ processes for data transmission blocks delivered by PDSCH reception in a second cell.

[0087] In some embodiments, the RF transceiver 310 is capable of receiving a first PDCCH in a first time-frequency resource and a second PDCCH in a second time-frequency resource, wherein the second time resource is different from the first time resource, and wherein the first time resource for PDSCH reception is adjacent to the last time resource of the first time resource in a subset of the first time-frequency resources and adjacent to the last time resource of the second time resource in a subset of the second time-frequency resources.

[0088] In some embodiments, RF transceiver 310 is capable of receiving a first PDCCH in a first time-frequency resource at a first time instance and a second PDCCH in a second time-frequency resource at a second time instance.

[0089] The TX processing circuit 315 receives analog or digital voice data from the microphone 320 or other output baseband data (such as network data, email, or interactive video game data) from the processor 340. The TX processing circuit 315 encodes, multiplexes, and / or digitizes the output baseband data to generate a processed baseband or IF signal. The RF transceiver 310 receives the output processed baseband or IF signal from the TX processing circuit 315 and up-converts the baseband or IF signal into an RF signal that is transmitted via the antenna 305.

[0090] The processor 340 may include one or more processors or other processing devices and execute an OS 361 stored in the memory 360 to control the overall operation of the UE 116. For example, the processor 340 may control the reception of forward channel signals and the transmission of reverse channel signals by the RF transceiver 310, the RX processing circuit 325, and the TX processing circuit 315 according to well-known principles. In some embodiments, the processor 340 includes at least one microprocessor or microcontroller.

[0091] Processor 340 is also capable of executing other processes and programs resident in memory 360, such as processes for reference signals on downlink channels. Processor 340 can move data into or out of memory 360 as needed for the executed processes. In some embodiments, processor 340 is configured to execute application 362 based on OS 361 or in response to signals received from the gNB or operator. Processor 340 is also coupled to I / O interface 345, which provides UE 116 with the ability to connect to other devices, such as laptops and handheld computers. I / O interface 345 is the communication path between these accessories and processor 340.

[0092] Processor 340 is also coupled to touch screen 350 and display 355. An operator of UE 116 may use touch screen 350 to enter data into UE 116. Display 355 may be a liquid crystal display, a light emitting diode display, or other display capable of rendering text and / or at least limited graphics (such as from a website).

[0093] In some embodiments, the processor 340 is capable of detecting the DCI format that schedules the received PDSCH, and determining the position of the HARQ-ACK bit in the HARQ-ACK codebook based on the value of the time slot offset field and the value of the counter field in each detected DCI format, and determining the time unit for sending the HARQ-ACK codebook based on the value of the time slot offset field in each detected DCI format.

[0094] In such embodiments, the DCI format configures reception of multiple PDSCHs, and the value of the counter field is increased according to the number of PDSCHs.

[0095] Memory 360 is coupled to processor 340. A portion of memory 360 may include random access memory (RAM), and another portion of memory 360 may include flash memory or other read-only memory (ROM).

[0096] Although Figure 3 An example of a UE 116 is shown, but may be Figure 3 Make various changes. For example, Figure 3Various components in the can be combined, further subdivided, or omitted, and additional components can be added as needed. As a specific example, processor 340 can be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). In addition, although Figure 3 The UE 116 is shown configured as a mobile phone or smartphone, but the UE may be configured to operate as other types of mobile or stationary devices.

[0097] Figure 4A is a high-level diagram of transmit path circuitry 400. For example, transmit path circuitry 400 may be used for orthogonal frequency division multiple access (OFDMA) communications. Figure 4B is a high-level diagram of receive path circuitry 450. For example, receive path circuitry 450 may be used for OFDMA communications. Figure 4A and Figure 4B For downlink communications, the transmit path circuit 400 may be implemented in a base station (e.g., gNB) 102 or a relay station, and the receive path circuit 450 may be implemented in a user equipment (e.g., Figure 1 In other examples, for uplink communications, the receive path circuit 450 may be implemented in a base station (e.g., Figure 1 102) or a relay station, and the transmit path circuit 400 may be implemented in a user equipment (e.g., Figure 1 is implemented in the user equipment 116).

[0098] The transmit path circuitry 400 includes a channel coding and modulation block 405, a serial-to-parallel (S-to-P) block 410, an inverse fast Fourier transform (IFFT) of size N, a parallel-to-serial (P-to-S) block 420, an add cyclic prefix block 425, and an upconverter (UC) 430. The receive path circuitry 450 includes a downconverter (DC) 455, a remove cyclic prefix block 460, a serial-to-parallel (S-to-P) block 465, a fast Fourier transform (FFT) of size N, a parallel-to-serial (P-to-S) block 475, and a channel decoding and demodulation block 480.

[0099] Figure 4A and Figure 4B At least some components of the algorithm may be implemented in software, while other components may be implemented in configurable hardware or a mixture of software and configurable hardware. In particular, it should be noted that the FFT block and IFFT block described in this disclosure may be implemented as configurable software algorithms, where the value of size N may be modified depending on the implementation.

[0100] In addition, although the present disclosure relates to embodiments implementing fast Fourier transform and inverse fast Fourier transform, this is for illustrative purposes only and should not be construed as limiting the scope of the present disclosure. It will be understood that in alternative embodiments of the present disclosure, the fast Fourier transform function and the inverse fast Fourier transform function can be easily replaced by discrete Fourier transform (DFT) function and inverse discrete Fourier transform (IDFT) function, respectively. It will be understood that for DFT and IDFT functions, the value of the N variable can be any integer (i.e., 1, 4, 3, 4, etc.), while for FFT and IFFT functions, the value of the N variable can be any integer that is a power of 2 (i.e., 1, 2, 4, 8, 16, etc.).

[0101] In the transmit path circuitry 400, the channel coding and modulation block 405 receives a set of information bits, applies coding (e.g., LDPC coding), and modulates the input bits (e.g., quadrature phase shift keying (QPSK) or quadrature amplitude modulation (QAM)) to produce a series of frequency-domain modulation symbols. The serial-to-parallel block 410 converts (i.e., demultiplexes) the serial modulation symbols into parallel data to produce N parallel symbol streams, where N is the IFFT / FFT size used in the BS 102 and the UE 116. The size-N IFFT block 415 then performs an IFFT operation on the N parallel symbol streams to produce a time-domain output signal. The parallel-to-serial block 420 converts (i.e., multiplexes) the parallel time-domain output symbols from the size-N IFFT block 415 to produce a serial time-domain signal. The add cyclic prefix block 425 then inserts a cyclic prefix into the time-domain signal. Finally, upconverter 430 modulates (ie, upconverts) the output of add cyclic prefix block 425 to RF frequency for transmission via a wireless channel. The signal may also be filtered at baseband before conversion to RF frequency.

[0102] After traversing the wireless channel, the transmitted RF signal reaches UE 116, where operations are performed that are the inverse of those at gNB 102. Downconverter 455 downconverts the received signal to baseband frequency, and cyclic prefix removal block 460 removes the cyclic prefix to produce a serial time-domain baseband signal. Serial-to-parallel block 465 converts the time-domain baseband signal into parallel time-domain signals. Size-N FFT block 470 then performs an FFT algorithm to produce N parallel frequency-domain signals. Parallel-to-serial block 475 converts the parallel frequency-domain signals into a series of modulated data symbols. Channel decoding and demodulation block 480 demodulates and then decodes the modulated symbols to recover the original input data stream.

[0103] Each of gNBs 101 to 103 may implement a transmit path similar to that for transmitting in the downlink to user equipments 111 to 116 and may implement a receive path similar to that for receiving in the uplink from user equipments 111 to 116. Similarly, each of user equipments 111 to 116 may implement a transmit path corresponding to the architecture for transmitting in the uplink to gNBs 101 to 103 and may implement a receive path corresponding to the architecture for receiving in the downlink from gNBs 101 to 103.

[0104] Either the DL transmission or the UL transmission may be based on an OFDM waveform, including the use of a variant of DFT precoding known as DFT-spread-OFDM, which is commonly applied to UL transmissions.

[0105] The reference time unit for DL ​​signaling or for UL signaling on a cell is called a time slot and may include one or more time slot symbols. A bandwidth (BW) unit is called a resource block (RB). One RB includes many subcarriers (SCs). For example, a time slot may have a duration of half a millisecond or one millisecond, including 7 symbols or 14 symbols, respectively, and an RB may have a BW of 180 kHz and include 12 SCs, where the spacing between SCs is 15 kHz. The BW reception capacity or BW transmission of a UE may be less than the DL system BW or the UL system BW, respectively, and different UEs may be configured for DL ​​reception or UL transmission in different parts of the DL system BW or the UL system BW, respectively, per time slot.

[0106] DL signals include data signals that convey information content, control signals that convey DL control information (DCI), and reference signals (RS), also known as pilot signals. The gNB transmits data information or DCI via the corresponding physical DL shared channel (PDSCH) or physical DL control channel (PDCCH). The gNB transmits one or more of several types of RS, including channel state information RS (CSI-RS) and demodulation RS (DMRS). CSI-RS is intended for UEs to measure channel state information (CSI). DMRS is typically transmitted only within the bandwidth of the corresponding PDCCH or PDSCH and can be used by UEs to demodulate DCI or data information. DL DMRS or CSI-RS can be constructed using a Zadoff-Chu (ZC) sequence or a pseudo-noise (PN) sequence.

[0107] For channel measurement, non-zero power CSI-RS (NZP CSI-RS) resources are used. For interference measurement reporting (IMR), CSI interference measurement (CSI-IM) resources associated with a zero power CSI-RS (ZP CSI-RS) configuration are used. A CSI process consists of NZP CSI-RS and CSI-IM resources. The UE can determine CSI-RS transmission parameters through higher layer signaling, such as radio resource control (RRC) signaling from the gNB. The CSI-RS transmission instance and resources can be indicated by DL control signaling or configured by higher layer signaling. DMRS is transmitted only within the bandwidth of the corresponding PDCCH or PDSCH, and the UE can use DMRS to demodulate data or control information.

[0108] Figure 5 An exemplary DL slot structure 500 for PDSCH transmission or PDCCH transmission according to an embodiment of the present disclosure is shown. Figure 5 The illustrated embodiment of the DL slot structure 500 for PDSCH transmission or PDCCH transmission is for illustration purposes only. Other embodiments may be used without departing from the scope of the present disclosure.

[0109] Time slot 510 includes Symbols 520, where the gNB sends data information, DCI or DMRS. The DL system BW includes RBs. Each RB includes SC. For example, UE is assigned M PDSCH RBs, a total of SC 530 is used for PDSCH transmission BW. The first slot symbol 540 can be used by the gNB to send DCI and DMRS. The second slot symbol 550 can be used by the gNB to send DCI, DMRS, or data information. The remaining slot symbols 560 can be used by the gNB to send data information, DMRS, and possibly CSI-RS. In some slots, the gNB may also transmit synchronization signals and system information.

[0110] UL signals also include data signals conveying information content, control signals conveying UL control signals (UCI), DMRS associated with data or UCI demodulation, sounding RS (SRS) that enables the gNB to perform UL channel measurements, and random access (RA) preambles that enable UEs to perform random access. The UE transmits data information or UCI via the corresponding physical UL shared channel (PUSCH) or physical UL control channel (PUCCH). When a UE transmits data information and UCI simultaneously, it may multiplex both on the PUSCH. UCI includes hybrid automatic repeat request acknowledgement (HARQ-ACK) information indicating correct or incorrect detection of a data transport block (TB) in the PDSCH, a scheduling request (SR) indicating whether the UE has data in its buffer, and a CSI report that enables the gNB to select appropriate parameters for PDSCH or PDCCH transmission to the UE.

[0111] The CSI report from the UE may include a channel quality indicator (CQI), which informs the gNB of the maximum modulation and coding scheme (MCS) for the UE to detect data TBs with a predetermined block error rate (BLER; such as a 10% BLER); a precoding matrix indicator (PMI), which informs the gNB how to combine signals from multiple transmitter antennas according to MIMO transmission principles; and a rank indicator (RI), which indicates the transmission rank of the PDSCH. UL RSs include DMRS and SRSs. DMRSs are transmitted only within the bandwidth of the corresponding PUSCH or PUCCH transmission. The gNB can use DMRSs to demodulate the information in the corresponding PUSCH or PUCCH. SRSs are transmitted by the UE to provide the gNB with UL CSI and, for TDD systems, may also provide PMIs for DL ​​transmissions. Furthermore, to establish synchronization or an initial RRC connection with the gNB, the UE may transmit a physical random access channel.

[0112] Figure 6 An exemplary UL slot structure 600 for PUSCH transmission or PUCCH transmission according to an embodiment of the disclosure is shown. Figure 6 The illustrated embodiment of the UL slot structure 600 for PUSCH transmission or PUCCH transmission is for illustration purposes only. Other embodiments may be used without departing from the scope of the present disclosure.

[0113] Time slot 610 includes Symbols 620 in which the UE transmits data information, UCI, or RS including at least one symbol in which the UE transmits DMRS 630. UL system BW includes RBs. Each RB includes SCs. UE is assigned M PUXCH RBs, a total of SCs 640 are used for PUSCH transmission BW ("X" = "S") or for PUCCH transmission BW ("X" = "C"). One or more last slot symbols can be used to multiplex SRS transmissions 650 (or PUCCH transmissions) from one or more UEs. The number of UL slot symbols available for data / UCI / DMRS transmission is When N SRS When the last slot symbol is used for SRS transmission (or PUCCH transmission) from the UE in a BW that at least partially overlaps with the PUXCH transmission BW, N SRS >0; otherwise, N SRS = 0. Therefore, the total number of SCs used for PUXCH transmission is PUCCH transmission and PUSCH transmission also occur in the same time slot; for example, the UE may send PUSCH in an earlier time slot symbol and PUCCH in a later time slot symbol.

[0114] A hybrid slot consists of a DL transmission region, a guard period region, and a UL transmission region, similar to a special subframe in LTE. For example, the DL transmission region may contain PDCCH and PDSCH transmissions, and the UL transmission region may contain PUCCH transmissions. For example, the DL transmission region may contain PDCCH transmissions, and the UL transmission region may contain PUSCH and PUCCH transmissions.

[0115] PDCCH transmission can be performed using multiple control channel elements (CCEs). The UE typically performs multiple PDCCH decoding operations to detect the DCI format in a TTI. The UE determines the location of the CCEs used for PDCCH reception (candidate PDCCHs) based on a search space function corresponding to the CCE aggregation level. The DCI format includes cyclic redundancy check (CRC) bits to allow the UE to confirm correct detection of the DCI format. The DCI format type is identified by the radio network temporary identifier (RNTI) that scrambles the CRC.

[0116] Hereinafter, a DCI format that schedules PDSCH transmission to a UE is referred to as a DL DCI format or DL ​​assignment, and a DCI format that schedules PUSCH transmission from a UE is referred to as a UL DCI format or UL grant.

[0117] Figure 7 An exemplary encoding process 700 for a DCI format according to an embodiment of the present disclosure is shown. Figure 7 The embodiment of the encoding process 700 for the DCI format shown is for illustration purposes only. Other embodiments may be used without departing from the scope of the present disclosure.

[0118] The gNB encodes each DCI format separately, for example using a polar code or a tail-biting convolutional code (TBCC), and transmits each DCI format in the corresponding PDCCH. Where applicable, the CRC of the DCI format codeword is masked with the RNTI of the UE for which the DCI format is intended, to enable the UE to identify the DCI format. For example, the CRC and RNTI may comprise 16 bits. Otherwise, when the RNTI is not included in the DCI format, a DCI format type indicator field may be included in the DCI format. A CRC calculation unit 720 is used to determine the CRC of the (uncoded) DCI format bits 710, and an exclusive-OR (XOR) operation unit 730 is used to mask the CRC 740 between the CRC bits and the RNTI bits. The XOR operation is defined as XOR(0,0)=0, XOR(0,1)=1, XOR(1,0)=1, XOR(1,1)=0. The masked CRC bits are appended to the DCI format information bits using a CRC append unit 750. The encoder 760 performs channel coding (such as tail-biting convolutional coding or polar coding) followed by rate matching to the allocated resources by the rate matcher 770. The interleaving and modulation unit 780 applies interleaving and modulation, such as QPSK, and transmits an output control signal 790.

[0119] Figure 8 An exemplary decoding process 800 of a DCI format for use with a UE according to an embodiment of the present disclosure is shown. Figure 8 The embodiment of the decoding process 800 for a DCI format for use with a UE is shown for illustration purposes only. Other embodiments may be used without departing from the scope of the present disclosure.

[0120] The received control signal 810 is demodulated and deinterleaved by the demodulator and deinterleaver 820. Rate matching applied at the gNB transmitter is recovered by the rate matcher 830, and the resulting bits are decoded by the decoder 840. After decoding, the CRC extractor 850 extracts the CRC bits and provides DCI format information bits 860. The DCI format information bits are demasked 870 using an XOR operation with the RNTI 880 (if applicable), and a CRC check is performed on each bit 890. When the CRC check succeeds (checksum is zero), the DCI format information bits are considered valid. When the CRC check fails, the DCI format information bits are considered invalid.

[0121] When a UE transmits UCI and data in the PUSCH, the UE may multiplex the UCI and data. A PUSCH transmission may also convey only UCI without any data transmission. The CSI request field in the UL DCI format that triggers A-CSI transmission in the PUSCH may include a predefined number of bits, such as 2 or 3 bits. The mapping of the 2 bits may be as shown in Table 1.

[0122] [Table 1]

[0123]

[0124] The UCI transmission in the PUCCH may substantially span a slot or several symbols of a slot, such as the last one or two symbols of a slot. UCI coding methods may include repetition coding, Reed-Muller coding, polar coding, or TBCC. The UE may semi-statically determine the HARQ-ACK codebook size based on a number of configured cells and the configured transmission mode for PDSCH transmission on each cell, or dynamically determine the HARQ-ACK codebook size based on a counter DL allocation index (DAI) or the total DAI that may be included in the DL DCI format that schedules the PDSCH transmission.

[0125] For example, the counter DAI field or the total DAI field may include 2 bits and the corresponding value may be interpreted using an offset (if any) of the 4 previous values ​​considered. For example, the counter DAI or total DAI binary values ​​00, 01, 10, 11 may be mapped to numerical values ​​1, 2, 3, 4 and modulo 4 arithmetic to indicate the corresponding number of transmitted DCI formats, as in LTE. For FDD systems, the value of the counter DAI field in the DL DCI format for PDSCH transmission in a time slot on a scheduled cell indicates the number of DL DCI formats for PDSCH transmission in a time slot on all cells having a scheduling index less than or equal to the cell index. The value of the total DAI field in the DL DCI format for PDSCH transmission in a time slot on a scheduled cell indicates the number of DL DCI formats for PDSCH transmission on all configured cells in the scheduled time slot. For a TDD system, the value of the Counter DAI field in the DL DCI format for scheduling PDSCH transmission in a time slot on a cell indicates the number of DL DCI formats that schedule PDSCH transmission on all configured cells in the previous time slot (if any) associated with the same time slot as the above-mentioned time slot for HARQ-ACK transmission and on all cells with indexes less than or equal to the cell index in the time slot. The value of the Total DAI field in the DL DCI format for scheduling PDSCH transmission in a time slot on a cell indicates the number of DL DCI formats that schedule PDSCH transmission on all configured cells and in all time slots associated with the same time slot for HARQ-ACK transmission up to the time slot.

[0126] One mechanism that helps meet the demand for increased network capacity and data rates is network densification. This is achieved by deploying small cells in order to increase the number of network nodes and their proximity to the UE and provide cell separation gain. As the number of small cells increases and the deployment of small cells becomes denser, the handover frequency and handover failure rate may also increase significantly. By maintaining an RRC connection with the macro cell, communication with the small cell can be optimized for control place (C-place) functions such as mobility management, paging, and system information updates can be provided only by the macro cell, while the small cell can be dedicated to user data plane (U-plane) communications. If the latency of the backhaul link between network nodes (cells) is effectively zero, then carrier aggregation (CA) can be used and scheduling decisions can be made by a central entity and passed to each network node. In addition, UCI from the UE can be received at any network node, possibly with the exception of nodes using unlicensed spectrum, and passed to the central entity to facilitate appropriate scheduling decisions for the UE.

[0127] CA operation can be achieved by supporting multiple cells, each with a maximum bandwidth of 20 MHz. In many applications of interest, a maximum bandwidth of 20 MHz for a carrier is too small and involves several disadvantages. For example, for unlicensed spectrum in the 5.8 GHz band, there is more than 200 MHz of available contiguous bandwidth, for the 3.5 GHz C-band, there is more than 400 MHz of contiguous spectrum available, and for the millimeter wave band, there are several GHz of contiguous spectrum available. Separate carriers with 20 MHz bandwidth each require corresponding separate guard segments over several hundred MHz of available contiguous bandwidth, each with a size of approximately 10% of the carrier's bandwidth, resulting in a significant (10%) waste of resources.

[0128] Therefore, the so-called 5G system preferably operates with a single carrier of larger size (such as 80MHz or 160MHz) rather than several carriers of smaller size (such as 20MHz). The limit on the size of the carrier BW is mainly determined by the sampling rate of the digital processing, because the larger the carrier BW, the higher the sampling rate required. In order to enable different UEs with different receive BW capabilities to be scheduled for PDSCH transmission during the same time slot, the design should support multiplexing on the system BW of PDCCH transmissions for UEs with different BW receive capabilities.

[0129] Another characteristic of so-called 5G systems is that transmission duration can depend on the type of service. For example, for services that benefit from low latency, the transmission duration can be 0.5 msec or less, while for latency-tolerant services, the overhead associated with packet headers can be minimized by transmitting larger TBs of data over longer transmission durations (e.g., 1 msec or longer). Furthermore, the transmission duration can vary, from just one symbol in a slot to all symbols in a slot to multiple slots.

[0130] Different services may also require different reliability requirements; for example, an ultra-reliable service may require a block error rate (BLER) of 0.001%, while a typical mobile broadband service may require a BLER of 1%.

[0131] The PUSCH transmission power from the UE is set with the goal of achieving the associated data reliability target by achieving the corresponding target receive SINR at the gNB's serving cell while controlling interference to neighboring cells. UL power control (PC) includes open-loop PC (OLPC) with cell-specific and UE-specific parameters, and closed-loop PC (CLPC) corrections provided by the gNB to the UE via transmit PC (TPC) commands. When PUSCH transmissions are scheduled by PDCCH, the TPC commands are included in the corresponding UL DCI format.

[0132] The UE can obtain the PUSCH transmission power P in cell c and time slot i PUSCH,c (i), in decibels per milliwatt (dBm), as shown in equation (1). For simplicity, it is assumed that the UE does not send both PUSCH and PUCCH in the same time slot. Equation (1) is given as follows:

[0133] [Equation 1]

[0134]

[0135] Among them, P CMAX,c (i) is the maximum UE transmission power in cell c and time slot i; M PUSCH,c (i) is the PUSCH transmission BW in RBs in cell c and time slot i; P O_PUSCH，c (j) The average received SINR at the gNB in ​​the control cell c and is the cell-specific component P O_NOMINAL_PUSCH,c (j) and the UE-specific component P provided to the UE by the gNB via higher layer signaling O_UE_PUSCH,c For PUSCH (re)transmissions with semi-persistent scheduling (SPS), j = 0. For PUSCH (re)transmissions with dynamic scheduling, j = 1. cis the path loss (PL) estimate calculated by the UE for cell c; for j = 0 or j = 1, α is set by the gNB through higher layer signaling c (j)∈{0,0.4,0.5,0.6,0.7,0.8,0.9,1} is configured to the UE. c (j) < 1 obtains partial ULPC because PC is not fully compensated; Δ TF,c (i) is equal to 0 or the spectral efficiency of PUSCH transmission is determined as where K S Configured by higher layer signaling to UE as K S =0 or K S =1.25, and for A-CSI sent via PUSCH but without UL-SCH data, BPRE=0 CQI / N RE , while for other cases, Where C is the number of code blocks, K r is the size of the code block r, O CQI is the number of CQI / PMI bits including CRC bits and N RE is the number of REs, determined as Among them, C, K r 、 as well as And for A-CSI sent via PUSCH but without UL-SCH data, For other cases, it is 1; and if cumulative CLPC is used, then f c (i) = f c (i-1)+δ PUSCH,c (iK PUSCH ), and if absolute CLPC is used, then f c (i) = δ PUSCH,c (iK PUSCH ), where δ PUSCH,c (iK PUSCH ) is a TPC command included in the UL DCI format for scheduling PUSCH or included in DCI format 3 / 3A. PUSCH It is derived from the time line between the time slot of the PDCCH transmission scheduling the PUSCH and the time slot of the corresponding PUSCH transmission.

[0136] PUCCH transmission power P from UE in cell c and time slot i PUCCH,c (i) is given by Equation 2:

[0137] [Equation 2]

[0138]

[0139] Among them, P CMAX,c (i) is the maximum UE transmission power in cell c and time slot i; P O_PUCCH,c is a cell-specific parameter P provided to the UE via higher layer signaling O_NOMINAL_PUCCH,c and UE-specific parameters P O_UE_PUCCH,c ;PL c The path loss (PL) estimate calculated by the UE for cell c; h(·) is a function whose value depends on the format used for PUCCH transmission and whether HARQ-ACK, SR or CSI is transmitted; Δ F_PUCCH (F) is provided by higher layers to the UE and its value depends on the corresponding PUCCH format (F); if PUCCH format F' is transmitted from two antenna ports, then Δ TxD (F') is non-zero; and g(i) = g(i-1) + δ PUCCH (i) is the accumulated TPC command δ in DCI format 3 / 3A or DL ​​DCI format PUCCH (i), and g(0) is the value after the accumulation is reset.

[0140] The SRS transmission power can be determined jointly with the PUSCH transmission power, while the PRACH transmission power can be determined by a combination of path loss measurements from the UE and a power increase procedure, for example, for content-based transmissions, or based on the use of TPC commands when PRACH transmission is triggered by a PDCCH command. For the sake of brevity, the description is omitted.

[0141] The present disclosure contemplates that, for CA operation, a UE may be configured to transmit or receive on one or more first cells using a first parameter set (numerology) or a first transmission duration and on one or more second cells using a second parameter set or a second transmission duration. Additionally, the one or more first cells may use a first radio access technology, such as LTE, and the one or more second cells may use a second radio access technology, such as 5G.

[0142] Therefore, it is necessary to enable multiplexing of PDCCH transmissions to UEs with different BW reception capabilities across the system BW. In addition, it is necessary to implement CA operation between carriers supporting control or data transmission of different durations. In addition, it is necessary to determine the HARQ-ACK codebook for CA operation between cells with different durations for corresponding PDSCH transmissions. In addition, it is necessary to support simultaneous transmissions from the UE on one or more first cells using a first duration and on one or more second cells using a second duration. In addition, it is necessary to design a transmission power control process for overlapping transmissions from the UE on one or more first cells using the first duration and on one or more second cells using the second duration. In addition, it is necessary to define a prioritization mechanism for power allocation from the UE to various signaling types using overlapping transmissions on one or more first cells using the first duration and on one or more second cells using the second duration. Finally, when the UE needs to simultaneously support multiple traffic services with different reception reliability requirements, it is necessary to define a power allocation method for the UE.

[0143] In some embodiments, configurations are provided for PDCCH transmissions on carriers for UEs with different bandwidth reception capabilities. While two UE categories are considered for simplicity, the embodiments can be directly extended to a larger number of UE categories. Transmissions to UEs from each of the two UE categories are treated as using the same set of parameters, such as the same SC spacing, the same OFDM symbol duration, etc.

[0144] A first UE belongs to a first UE category and is capable of receiving at a first BW, such as 80 MHz or 160 MHz, while a second UE belongs to a second UE category and is capable of receiving at a second BW, such as 20 MHz, which is smaller than the first BW. For simplicity, the carrier's BW is considered to be the same as the first BW. For PDCCH transmissions, the first BW is divided into two parts: a first BW part corresponding to the first BW excluding the second BW, and a second BW part corresponding to the second BW. The first UE can be informed of the BW split via UE-general or UE-specific higher layer signaling from the gNB. UE-general signaling informing of the BW split can also be provided via PDCCH transmission using a UE-general RNTI. When UEs in the second category are not served by the gNB, the gNB can avoid configuring the BW split.

[0145] In one example, a PDCCH transmission to a first UE is in a first BW portion, while a PDCCH transmission to a second UE is in a second BW portion. Although the first UE may be scheduled to receive a PDSCH transmission over the first BW or to receive other signaling such as CSI-RS over the first BW, the first UE may be configured to receive the PDCCH only over the first BW portion of the first BW (i.e., only over the first BW excluding the second BW). In such an example, the first BW portion constitutes a virtual system BW for PDCCH transmission, which is smaller than the first BW available for PDSCH transmission to the first UE. Generally, the second BW portion may be in any portion of the first BW. To avoid duplication of transmission of some signaling (such as broadcast control signaling or synchronization signaling), the second BW may include the BW for the aforementioned signaling. The second UE may receive both PDCCH and PDSCH transmissions in the second BW portion, or may realign and receive either PDCCH or PDSCH transmissions in another BW portion of the first BW that is equal to the second BW portion.

[0146] Figure 9 An exemplary partitioning 900 of a first BW into a first BW portion for PDCCH transmission to a first UE of a first UE category and a second BW portion for PDCCH transmission to a second UE of a second UE category according to an embodiment of the present disclosure is shown. Figure 9 The embodiment of partitioning 900 of dividing the first BW into a first BW portion for PDCCH transmission to a first UE of a first UE category and a second BW portion for PDCCH transmission to a second UE of a second UE category is for illustration purposes only. Other embodiments may be used without departing from the scope of this disclosure.

[0147] The time slot for PDCCH transmission and for PDSCH transmission includes 7 OFDM symbols (7 time slot symbols) 910. The system BW 920 is divided into a first BW part 930, 935 and a second BW part 940. PDCCH transmission to a first UE of a first UE category can be configured to be only on the first BW part of the carrier BW and on a first number of OFDM symbols (2 OFDM symbols), while PDSCH transmission can be on the carrier BW. Both PDCCH transmission and PDSCH transmission to a second UE of a second UE category can be only on the second BW part of the carrier BW and on a second number of OFDM symbols (1 OFDM symbol). The number of symbols in the time slot used for PDCCH transmission to the first UE can be different from the number of symbols in the time slot used for PDCCH transmission to the second UE. Each of the two symbol numbers can be indicated by a corresponding DCI format, which is decoded by the first UE and the second UE, respectively, to determine the first symbol of the PDSCH transmission or PUSCH transmission.

[0148] In another example, the carrier BW is not explicitly divided for PDCCH transmission (considered to be the same as the first BW). Instead, to achieve multiplexing of PDCCH transmissions to the first UE via the first BW and to the second UE via the second BW, the CCEs used for PDCCH transmission to the first UE are positioned in the second BW (the second BW portion) or in the first BW portion (the first BW excluding the second BW), depending on the corresponding search space considering PDCCH transmissions on a BW equal to the first BW portion or the second BW portion. Thus, the first UE can be configured with the first BW portion and a first number of symbols for first PDCCH reception and the second BW portion and a second number of symbols for second PDCCH reception.

[0149] The first UE may have a first number of candidate PDCCHs and a first number of symbols for a CCE aggregation level for PDCCH transmission in a first BW portion of a carrier (or cell), and a second number of candidate PDCCHs and a second number of symbols for a CCE aggregation level for PDCCH transmission in a second BW portion of a carrier (or cell). Each number of candidates may be configured by the gNB to the first UE via higher layer signaling. Thus, the first UE may attempt PDCCH decoding based on two search spaces (a first search space on the first BW excluding the second BW and a second search space on the second BW). When no candidate PDCCH is configured for PDCCH transmission in the second BW portion of the carrier, the PDCCH transmission to the first UE is performed as in Figure 9 That way, the system BW is implicitly divided for PDCCH transmission.

[0150] Figure 10 An exemplary process 1000 is shown for allocating multiple candidate PDCCHs from a gNB to a UE in a first BW portion of a system BW over a first number of symbols and in a second BW portion over a second number of symbols according to an embodiment of the present disclosure. Figure 10 The illustrated embodiment of process 1000 for allocating multiple candidate PDCCHs from a gNB to a UE in a first BW portion of the system BW over a first number of symbols and in a second BW portion over a second number of symbols is for illustration purposes only. Other embodiments may be used without departing from the scope of this disclosure.

[0151] In step 1010, a transmission point (such as a gNB) configures a first BW portion of a system BW on a carrier spanning a first number of symbols to a UE, and configures a first set of candidate PDCCHs for a corresponding first set of CCE aggregation levels for PDCCH transmission in the first BW portion spanning the first number of symbols. Based on the system BW and the first BW portion, the UE determines a second BW portion as the system BW in addition to the first BW portion. Based on a predetermined total number of candidate PDCCHs for the corresponding set of CCE aggregation levels and the configured first set of candidate PDCCHs for the corresponding first set of CCE aggregation levels, in step 1020, the UE determines a second set of candidates for the corresponding second set of CCE aggregation levels for PDCCH transmission in a second BW portion on the carrier spanning the second number of symbols.

[0152] It is also possible that step 1010 is with respect to the second BW part and step 1020 is with respect to the first BW part. It is also possible that the gNB configures the first BW part and the first number of symbols and both the second BW part and the second number of symbols to the UE, for example to enable the presence of additional BW parts that do not need to be notified to the UE, and the number of candidate PDCCHs for each CCE aggregation level for each BW part. The first set of CCE aggregation levels may be the same as the second set of CCE aggregation levels and is predetermined in system operation. In step 1030, the UE decodes the candidate PDCCHs according to the first set of number of candidates for the corresponding first set of CCE aggregation levels in the first BW part on the first number of symbols, and decodes the candidate PDCCHs according to the first set of number of candidates for the corresponding first set of CCE aggregation levels as in Figure 9 The candidate PDCCHs are decoded based on a second set of candidates for a corresponding second set of CCE aggregation levels in a second BW part on a second number of symbols in the .

[0153] The configuration of the first BW portion and the first number of symbols for the first category of UEs can also vary over time and depend on the slot number within the slot set. For example, in a slot from the first subset of the slot set, a PDCCH transmission to the first UE can be in the first BW portion of the carrier BW and in the first number of symbols, while in a slot from the second subset of the slot set, the PDCCH transmission to the first UE can be in the first BW (same as the carrier BW) and in the first BW portion and in the first number of symbols, or in the second BW portion and in the second number of symbols. The first and second slot subsets can be configured by the gNB to the UE via higher layer signaling (such as a bitmap). For example, this can allow different sets of parameters to be multiplexed in a time-division multiplexing (TDM) fashion, and the UE can have all candidate PDCCHs on the first BW excluding the second BW during a slot, where the second BW portion is indicated as unavailable for PDCCH transmission to the UE. As previously described, whether BW partitioning applies to a slot can alternatively be indicated by a PDCCH scrambled using the UE-generic RNTI to scramble the CRC of the associated DCI format. Thus, the UE may receive PDCCH transmissions in a first BW portion on a first number of symbols in a first subset of time slots from the time slot set, and receive PDCCH transmissions in a first BW portion on a first number of symbols and in a second BW portion on a second number of symbols in a second subset of time slots from the time slot set.

[0154] Configuring a BW portion of a carrier's BW to exclude PDCCH transmissions or configuring a BW portion where PDCCH transmissions occur (and a regional portion of a carrier to exclude PDCCH transmissions) can also benefit frequency-domain inter-cell interference coordination (ICIC). For example, a gNB can transmit a PDCCH in a first cell using a first set of BW portions of a carrier's BW over a corresponding first number of symbols, and transmit a PDCCH in a second cell using a second set of BW portions of a carrier's BW over a corresponding second number of symbols, where the first and second sets can have non-common elements in order to suppress or completely avoid interference between PDCCH transmissions on the two cells. Thus, the configuration of a BW portion of a carrier's BW for PDCCH transmission purposes can also be applied when a single class of UEs communicates with the gNB.

[0155] In some embodiments, HARQ-ACK transmissions from a UE configured for DL ​​CA operation are provided when the PDSCH transmission duration is the same for all cells, and when at least two groups of one or more cells use different PDSCH transmission durations. In one example, the UE is configured for DL ​​CA operation, where PDSCH transmissions in all cells have the same transmission duration. The first scenario also includes a case where there is no CA operation (the number of configured cells is one). In another example, the UE is configured for DL ​​CA operation, where PDSCH transmissions in a first group of cells have a first duration and PDSCH transmissions in a second group of cells have a second duration, and the first duration is an integer multiple of the second duration.

[0156] The DL DCI format that schedules PDSCH transmission to a UE includes a field indicating the slot offset relative to the slot of the PDSCH transmission so that the UE transmits HARQ-ACK information in response to receiving the data TB conveyed by the PDSCH. The DL DCI format may also include a field indicating the resources of the PUCCH that conveys the HARQ-ACK information. The exact PUCCH structure is not important to this disclosure and may be the same as one of the PUCCH formats used for DL ​​CA operation, or a different structure with transmission over a few symbols at the end of the slot may be applied.

[0157] The DL DCI format for scheduling PDSCH transmission to UEs on a cell may include a counter DAI field, a total DAI field, and a slot offset field to transmit HARQ-ACK information in response to correct or incorrect detection of a data TB conveyed by the corresponding PDSCH. For a PDSCH sent to a UE in slot n, the slot offset k1 indicates to the UE that the corresponding HARQ-ACK information is transmitted in slot n+k1 (when k1 is defined relative to n) or in slot n+k1+k0 (when k1 is defined relative to k0), where k0 is a predetermined value based on, for example, the UE category or is configured to and equal to the number of slots between the slot when the UE receives the PDSCH and the earliest next slot when the UE can transmit the associated HARQ-ACK information. The UE may receive the PDSCH in the entire slot n or in a portion of the slot n, or the UE may receive multiple PDSCHs in slot n.

[0158] For example, when a UE requires at least two slots to transmit HARQ-ACK information in response to PDSCH reception, k0 = 2. The UE can inform the serving gNB of the k0 value relative to the reference slot duration, either explicitly through higher layer signaling or implicitly through UE-specific signaling. Consequently, the counter DAI value and the total DAI value increment for a number of slots depending on the value of k1, which defines the set of slots in which the UE transmits associated HARQ-ACK information, such as in the PUCCH, in symbols of the same slot. This applies to both FDD and TDD operation.

[0159] When the k1 value of the slot offset field does not match other k1 values ​​in the DL DCI format detected by the UE in the previous time slot belonging to the same time slot set, the UE may discard the DL DCI format of the PDSCH transmission on the cell scheduled in the time slot. For example, when the UE detects a first DL DCI format with a first k1 value greater than zero for the corresponding first PDSCH transmission on the cell scheduled in the time slot, and the UE detects a second DL DCI format with a second k1 value for the corresponding second PDSCH transmission on the cell scheduled in the next time slot (wherein in one of the second DL DCI formats, the second k1 value is less than the first k1 value and the difference between the two is greater than 1), the UE may discard one of the second DL DCI formats.

[0160] When DL DCI formats associated with the same set of time slots indicate PUCCH resources for HARQ-ACK transmission in the time slot, the same validation may apply and the UE may discard DL DCI formats that indicate different PUCCH resources than the PUCCH resources indicated in the remaining DL DCI formats. For example, when the UE is configured for CA operation and the UE detects DL DCI formats that schedule corresponding PDSCH transmissions on different cells in the same time slot and one of the DL DCI formats indicates different PUCCH resources for transmission of associated HARQ-ACK information, the UE may discard one of the DL DCI formats. The counter DAI and total DAI operations may be as for TDD systems in LTE, regardless of whether the communication system operates in FDD mode or TDD mode.

[0161] Figure 11 An exemplary process 1100 is shown for the operation of the counter DAI field, the total DAI field, and the HARQ-ACK transmission slot offset field in a DL DCI format for scheduling PDSCH transmissions with the same duration of one slot on corresponding cells according to an embodiment of the present disclosure. Figure 11The embodiment of the process 1100 for scheduling the operation of the counter DAI field, the total DAI field, and the HARQ-ACK transmission slot offset field in the DL DCI format for PDSCH transmissions of the same duration of one slot on the corresponding cell is shown for illustration purposes only. Other embodiments may be used without departing from the scope of the present disclosure.

[0162] The DL DCI format for scheduling PDSCH transmission in a timeslot on cell c includes a value The counter DAI field has a value of The total DAI field of , and a slot offset with a value of k1. In the first slot 1110, there are three scheduled PDSCH transmissions to the UE, and the triplet value ( k1) starting from the cell with the lowest index among the cells with PDSCH transmission in the first time slot are (1, 3, 2), (2, 3, 2) and (3, 3, 2). In the second time slot 1120, there are two scheduled PDSCH transmissions for the UE and the triplet value ( k1) are (4, 1, 1) and (1, 1, 1). In the third time slot 1130, there are two scheduled PDSCH transmissions to the UE, and the triplet value ( k1) is (2, 3, 0) and (3, 3, 0). Based on the k1 value in any of the DL DCI formats, the UE determines that the third time slot is the last time slot of the three time slots defining the first time slot set 1135, in which the UE sends HARQ-ACK information in the same time slot. The triplet value ( k1) is reset in the DL DCI format that schedules the PDSCH on the cell with the lowest index in the fourth slot 1140, and similar operations in the first slot set apply to the second slot set. Based on the k1 value in any of the DL DCI formats detected by the UE in slots n+3 or n+4 or n+5 or n+6, the UE determines that slots 1140, 1150, 1160 and 1170 constitute the second slot set 1175 and assumes the triplet value ( k1) is reset after time slot n+6.

[0163] Figure 11 The description in

[0045] considers a "time slot" as the minimum time unit for a PDSCH transmission. However, the same description applies to any other duration of the minimum time unit, such as a time slot symbol or a plurality of time slot symbols. In addition, different PDSCH transmissions may have different durations.

[0164] Typically, the minimum time interval for updating the total DAI value to the UE (when the DL DCI format is conveyed by the PDCCH transmission to the UE) is the number of slot symbols (or slots) between consecutive PDCCH receptions in the same or different BW parts and multiple symbols. For example, when the UE is configured to update the total DAI value every When receiving PDCCH transmission in the BW part over multiple symbols (time-frequency resources for PDCCH reception) for a period of 1 symbol (PDCCH monitoring period), symbols (per PDCCH monitoring period) to update the total DAI value. For example, when the UE is configured to update the total DAI value every symbols to receive a PDCCH transmission in a first BW portion over a first number of symbols ( is the first PDCCH monitoring period in the first time-frequency resource) and is also configured to symbols to receive a PDCCH transmission in a second BW portion over a second number of symbols ( is the second PDCCH monitoring period in the second time-frequency resource), it can be symbols or Generally, the UE may be configured to receive a PDCCH in a first time-frequency resource at a first time instance and a PDCCH in a second time-frequency resource at a second time instance.

[0165] For the simultaneous occurrence of first time-frequency resources and second time-frequency resources for PDCCH reception of the UE, the total DAI value can be updated to the same value for the UE in the first DL DCI format conveyed by the first PDCCH transmission in the first time-frequency resources and in the second DL DCI format conveyed by the second PDCCH transmission in the second time-frequency resources, unless the first time-frequency resources and the second time-frequency resources are respectively associated with PDCCH transmissions that schedule corresponding PDSCH transmissions for different data service types for transmission of corresponding HARQ-ACK information in different HARQ-ACK codebooks; in such case, the total DAI value as well as the counter DAI value and the time slot offset value are independent in the DCI formats conveyed by the PDCCH transmission in the first set of time-frequency resources and by the PDCCH transmission in the second set of time-frequency resources.

[0166] exist Figure 11 The counter DAI value for a UE is updated in each DL DCI format conveyed by a corresponding PDCCH transmission to the UE in any time-frequency resource configured to the UE for PDCCH reception.

[0167] The total DAI value can also be indicated as Figure 11The total DAI value is the same across all DL DCI formats conveyed by PDCCH transmissions in all slots of the same time slot, rather than just across DL DCI formats conveyed by PDCCH transmissions in the same slot. This approach enables the gNB to generate DL DCI formats in a continuous manner in each slot, eliminating the need to know in advance the total number of DL DCI formats to be conveyed by PDCCH transmissions in the slot in order to set the same corresponding total DAI value in each of the DL DCI formats. When the total DAI value is set based on multiple DL DCI formats conveyed by PDCCH transmissions over multiple slots (or PDCCH monitoring periods), rather than being updated in each slot (or PDCCH monitoring period), the gNB scheduler is limited to the number of DL DCI formats that can be conveyed by PDCCH transmissions over the multiple slots (or PDCCH monitoring periods), rather than being limited to the number of DL DCI formats that can be conveyed by PDCCH transmissions in each slot from the multiple slots.

[0168] For HARQ-ACK transmissions from a UE in response to the UE receiving DL DCI formats and data TBs corresponding to different service types, the UE may be configured to transmit a separate HARQ-ACK codebook for each service type. The service type identifier may be provided in the DL DCI format explicitly through a corresponding field in the DL DCI format or implicitly, for example, through a corresponding DL DCI format size, which may be different for different service types. The presence of a counter DAI field, a total DAI field, or a slot offset field may be configured separately for DL ​​DCI formats, such as DCI formats associated with different services. The PDCCH transmission conveying the DL DCI format may be in a UE-specific search space. For example, a DL DCI format scheduling MBB may include these fields, while a DL DCI format scheduling a low-latency service or a machine type communication service with high reliability may not include these fields, for example because HARQ-ACK information is transmitted separately for each data TB. When HARQ-ACK information of different service types is transmitted in different HARQ-ACK codebooks and the counter DAI field or the total DAI field is present in the corresponding DL DCI format, the corresponding value is set separately for each HARQ-ACK codebook. That is, the function of the counter DAI field or the total DAI field is parallelized for the corresponding HARQ-ACK codebook.

[0169] In some embodiments, the time slot duration used for PDSCH transmission may be different between cells. For simplicity, it is assumed that the cells are arranged into two groups: a first group for PDSCH transmission within a first time slot duration cells, and a second group for PDSCH transmission in the second slot duration However, the following description can be extended in a straightforward manner in the case of an additional time slot duration. The first time slot duration is an integer P times greater than the second time slot duration.

[0170] For example, a first slot duration may correspond to a cell using LTE as a radio access technology, and a second slot duration may correspond to a cell using 5G radio access technology. For example, a first slot duration may correspond to a cell using 5G as a radio access technology with a first parameter set, and a second slot duration may correspond to a cell using 5G radio access technology with a second parameter set. The slot used for HARQ-ACK transmission may have the same duration as the first slot duration, the second slot duration, or a third duration that is different from the first slot duration or the second slot duration.

[0171] When the UE sends a signal in the same PUCCH for a signal from the first group cells and cells from the second group When the HARQ-ACK information of the cell of the second group is scheduled The slot offset value in the DL DCI format for PDSCH transmissions on cells of the same cell remains the same for P consecutive second slots, where the first of the P second slots is aligned with the beginning of the first slot. Thus, the time reference for PUCCH transmissions with a shorter slot duration is the longer slot duration.

[0172] In the first method, for the first group cells and cells from the second group For the purpose of the counter DAI function, the second group cells can be considered as coming from the first group of cells In the second method, for the first group The PDSCH transmission in the second group The counter DAI value can be increased individually for each PDSCH transmission in each cell. The counter DAI operation of the second method for each group of cells can be the same as that of a single group of cells, such as Figure 11 shown.

[0173] In the first method, when the first slot and the second slot of the corresponding DL DCI format used to convey the scheduling of the corresponding PDSCH transmission have the same starting position, the total DAI value in each DL DCI format can be set to include the values ​​from the first group cells and cells from the second group When the starting position of the second time slot of the PDCCH transmission used to convey the DL DCI format scheduling the second PDSCH transmission is after the starting position of the first PDCCH transmission conveying the DL DCI format scheduling the first PDSCH transmission, the total DAI value may only include the data from the second group. PDCCH / PDSCH transmission on a cell.

[0174] When the scheduler can make a decision to schedule on P consecutive second time slots at the beginning of P consecutive second time slots, the total DAI value in each DL DCI format can be set to include the values ​​from the first group cells and cells from the second group The scheduler knows the total DAI value in advance regardless of the starting position of the second PDCCH transmission relative to the first PDCCH transmission.

[0175] Figure 12 Example operations 1200 are shown for conveying a counter DAI field, a total DAI field, and a HARQ-ACK transmission slot offset field in a DL DCI format for scheduling in different cells at different time instances via PDCCH transmission in accordance with an embodiment of the present disclosure. Figure 12 The illustrated embodiment of the operation 1200 of transmitting the counter DAI field, the total DAI field, and the HARQ-ACK transmission slot offset field in the DL DCI format for scheduling in different cells at different time instances via PDCCH transmission is for illustration purposes only. Other embodiments may be used without departing from the scope of the present disclosure.

[0176] The DL DCI format for scheduling PDSCH transmission in cell c in time slot includes The counter DAI field has a value of The total DAI field is a 1210 DL CDI format, and a slot offset having a value of k1. There are two groups of cells, wherein the first group includes one cell with a first PDCCH transmission periodicity (such as a slot of a first duration) and the second group includes three cells with a second PDCCH transmission periodicity (such as a slot of a second duration). The first slot duration is twice the second slot duration. In a first PDCCH transmission in a slot of a second duration that is aligned (starting at the same symbol) with a first PDCCH transmission in slot 1210 of the first slot duration, there are three DL CDI formats conveyed by the respective PDCCH transmissions and scheduling respective PDSCH transmissions to the UE, and the triplet value ( k1) is (1, 3, 1), (2, 3, 1), and (3, 3, 1) starting from the cell with the lowest index among cells with PDCCH / PDSCH transmission in the first two slots.

[0177] A cell having a PDCCH transmission periodicity of the first slot duration may be assigned a lower index (or vice versa). In a second slot 1220 having a PDCCH transmission periodicity of the second slot duration, there is one PDCCH transmission scheduling a corresponding PDSCH transmission to the UE, and the triplet value ( k1) is (4, 4, 1). In the third time slot 1230 of the PDCCH transmission periodicity having the second time slot duration, there are two PDCCH transmissions scheduling corresponding PDSCH transmissions to the UE, and the triplet value ( k1) are (1, 2, 0) and (2, 2, 0). In the fourth time slot 1240 of the PDCCH transmission with the second time slot duration, there are three PDCCH transmissions scheduling corresponding PDSCH transmissions to the UE, and the triplet value ( k1) are (3, 1, 0), (4, 1, 0) and (1, 1, 0).

[0178] Based on the k1 value in any one of the DL DCI formats, the UE determines that the fourth slot of the PDCCH transmission with the second duration is the last slot, or the second slot of the PDCCH transmission with the first slot duration is the last slot in the first set 1245 of corresponding slots, in which the UE sends HARQ-ACK information in the same codebook. The triplet value ( k1) is reset in the DL DCI format that schedules the PDSCH on the cell with the lowest index in the fifth slot of the PDCCH transmission with the second duration or in the first slot 1250 of the PDCCH transmission with the first duration, and similar operation as in the first set of slots applies. Based on the k1 value in any of the DL DCI formats detected by the UE in slots n+4 1250 to n+9 1290, the UE determines that the last slot in the second set of slots 1295 is slot n+9 and assumes the triplet value ( k1) Reset after slot n+9 for PDCCH transmission with second slot duration.

[0179] It is also possible that the DL DCI format in only one of the two groups of cells includes a counter DL DCI field or a total DL DCI field. When the cells include a small number of cells such as 1 or 2 cells, the HARQ-ACK codebook can always be fixed to 1 bit or 2 bits per time slot, respectively, for example when the PDSCH transmission mode conveys one data TB or when HARQ-ACK bundling in the spatial domain is applicable, and the counter DAI or total DAI does not need to be included in the DL DCI format.

[0180] Responding to The cells of the cells and the cells from PDSCH reception on a cell of the cell, configured with a first group of first PDCCH transmission periodicity such as a first slot duration cells and a second group having a second PDCCH transmission periodicity such as a second slot duration It is also possible that a UE of multiple cells may also be configured with separate first and second cells for corresponding HARQ-ACK transmissions. In this case, the HARQ-ACK transmissions per cell group (CG) are the same as for a single group of cells.

[0181] When the slot offset field is not included in the DL DCI format for scheduling PDSCH transmissions, and for one PDSCH transmission per slot, there may be a fixed time relationship between the slot of the PDSCH transmission and the slot of the corresponding HARQ-ACK transmission. cells and a second group having a second time slot duration For a UE operating in FDD in a cell, where the first time slot duration is an integer P times greater than the second time slot duration, the UE may The HARQ-ACK transmission of the cells operates as in FDD mode and for the second group The HARQ-ACK transmission for each cell operates as in TDD mode, where the UE sends HARQ-ACK information in the same codebook for one slot of the first duration and for P slots of the second duration.

[0182] gNB and UE handle scheduling from the first group The counter DAI field and the total DAI field (if any) in the DL DCI format for PDSCH transmissions on cells of the second group are processed by the gNB and UE as for FDD operation. The counter DAI field and the total DAI field (if any) in the DL DCI format for the PDSCH transmission of the UE on the cell of the cell, as for TDD operation with an associated slot set size of P slots, are first responded to from The HARQ-ACK information bits are placed in the codebook in response to the PDSCH reception in the cell of the cell (including the case where there is no PDSCH reception in the cell when the UE fails to detect the corresponding DL DCI format), and then respond to the The UE can construct and the gNB can deconstruct the HARQ-ACK codebook for PDSCH reception in the first group of cells. The reverse case is also applicable because, in the first slot duration, for the HARQ-ACK information bits from the first group of cells, the UE can construct and the gNB can deconstruct the HARQ-ACK codebook. For each single first time slot of a PDSCH transmission on a cell of the second group, there is a P>1 second time slot for PDSCH transmission on a cell of a cell.

[0183] When a UE configured for FDD operation can receive PDSCH transmissions on a first slot duration and on a second slot duration and can transmit HARQ-ACK on a third slot duration, the third slot duration being an integer P1 times greater than the first slot duration and an integer P2 times greater than the second slot duration, the UE can receive PDSCH transmissions on a first group of Cell and group The HARQ-ACK transmissions for both cells operate as in TDD mode. In response to PDSCH receptions up to P1 slots with a first duration and up to P2 slots with a second duration, the UE sends HARQ-ACK information in the same codebook. The gNB and the UE process the counter DAI field and the total DAI field in the DL DCI format that schedules PDSCH transmissions to the UE, as for the DL DCI format from the first group. The associated time slot set size P1 of the cell or the cell from the second group The associated time slot set size P2 of each cell is the same as that for TDD operation.

[0184] Generally, regardless of whether the system operation is based on FDD or TDD, when the first time slot k in which the UE receives the PDSCH transmission from the gNB and the second time slot n in which the UE transmits the corresponding HARQ-ACK information to the gNB do not have a fixed time relationship (such as n=k+4), the counter DAI field and the total DAI field in the DL DCI format can operate as for a TDD system. This may also be because the gNB can send multiple PDSCHs to the UE on multiple time slots and the UE needs to send the corresponding HARQ-ACK information in the same time slot, and the multiple time slots essentially form a related time slot set.

[0185] When a single DL DCI format schedules multiple PDSCH transmissions that convey multiple corresponding data TBs, the counter DAI value in the DL DCI format is increased according to the number of PDSCH transmissions. Similarly, the total DAI value in the DL DCI format is increased according to the number of PDSCH transmissions. The position of the HARQ-ACK bit in the HARQ-ACK codebook sent by the UE can be determined based on the time (such as the symbol or time slot in the time slot) when the UE detects the DCI format, rather than the time when the corresponding data TB is received.

[0186] Instead of including a counter DAI field or a total DAI field in the DL DCI format for scheduled PDSCH transmissions, the gNB can configure the UE with a fixed HARQ-ACK codebook size. The same HARQ-ACK codebook size can apply to all cells, or the HARQ-ACK codebook size can be configured per cell or per group of cells. In this case, the total DAI field can be omitted from the DL DCI format, and only the counter DAI field can be included. Alternatively, the HARQ-ACK map field, as described next, can be included in the DL DCI format.

[0187] When the UE is configured with the first group A cell (first CG) is used for PDCCH transmission with a first periodicity such as a first slot duration and a second group When a cell (second CG) is used for PDCCH transmission with a second periodicity such as a second time slot duration, where the first time slot duration is an integer P times larger than the second time slot duration, one of the following three methods can be applied to determine the size of the HARQ-ACK codebook sent by the UE for the first CG and the second CG in the same channel.

[0188] In the first approach, a single HARQ-ACK codebook size of H bits is configured to the UE relative to the first CG, and the UE determines a HARQ-ACK codebook size of H×P bits for the second CG. In the second approach, the HARQ-ACK codebook size is configured per CG, where the configuration of the second CG can be explicit or implicit by a scaling factor relative to the configured HARQ-ACK codebook size for the first CG. In the third approach, the gNB configures the HARQ-ACK codebook size to the UE separately for each cell in the first CG and each cell in the second CG. These three approaches offer trade-offs in terms of configuration granularity of the per-cell HARQ-ACK codebook size and the higher-layer signaling overhead required for the configuration.

[0189] In the following, for simplicity, it is assumed that the UE generates one HARQ-ACK information bit in response to a PDSCH reception. When the UE generates two HARQ-ACK information bits in response to a PDSCH reception, such as when the PDSCH transmission mode is associated with the transmission of two data TBs and the UE does not apply HARQ-ACK spatial domain bundling, the description can be extended in a straightforward manner. For each PDSCH reception, the UE generates an ACK or a NACK, depending on whether the UE correctly or incorrectly detects the associated data TB.

[0190] The UE may determine the position of the HARQ-ACK information bits in the HARQ-ACK codebook based on the value of the HARQ-ACK MAP field included in the associated DL DCI format. For example, for a HARQ-ACK codebook size of H bits, the HARQ-ACK MAP field may include ceil(log2(H)) bits, where ceil() is a ceiling function that rounds a number to its next higher integer.

[0191] Figure 13 An exemplary determination 1300 of a HARQ-ACK codebook using a HARQ-ACK mapping field by a UE configured for DL ​​CA operation according to an embodiment of the present disclosure is shown. Figure 13 The illustrated embodiment of determining 1300 a HARQ-ACK codebook using the HARQ-ACK MAP field by a UE configured for DL ​​CA operation is for illustration purposes only. Other embodiments may be used without departing from the scope of the present disclosure.

[0192] The gNB configures the UE for DL ​​CA operation, where the first cell 1310 uses a first slot duration for PDSCH transmission, and where the second cell 1320 and the third cell 1330 use a second slot duration for PDSCH transmission. The first slot duration is twice as long as the second slot duration. The gNB also configures the UE with a first HARQ-ACK codebook size of H1 bits for the first cell and a second HARQ-ACK codebook size of H2 bits commonly used for the second and third cells. Thus, the configured HARQ-ACK codebook size may differ for cells with different PDSCH transmission durations. The DL DCI format transmitted to the UE includes a HARQ-ACK MAP field, which may have H1 valid values ​​when scheduling PDSCH transmission in the first cell and H2 valid values ​​when scheduling PDSCH transmission in the second or third cell. For example, the HARQ-ACK MAP field may include ceil(log2(H1)) bits when scheduling PDSCH transmission in the first cell and ceil(log2(H2)) bits when scheduling PDSCH in the second cell. For example, H2=2H1 and H1=2.

[0193] For a slot set 1340 in which the UE indicates in the detected DL DCI format to transmit a HARQ-ACK codebook in the slot and for the first cell, the UE detects a first DL DCI format in the second slot of the associated slot set and a second DL DCI format for scheduling a PDSCH in the fourth slot of the associated slot set, and generates an ACK or NACK value for corresponding HARQ-ACK information depending on a corresponding correct or incorrect detection of the associated TB. The first and second DL DCI formats include HARQ-ACK MAP fields having respective values ​​of 1 and 2.

[0194] For the second cell, the UE detects first, second, and third DL DCI formats that schedule corresponding PDSCH transmissions in first, fifth, and seventh time slots of the associated time slot set. The first, second, and third DL DCI formats include HARQ-ACK map fields with corresponding values ​​of 1, 3, and 4. The UE may determine that the UE fails to detect a DL DCI format that schedules PDSCH transmissions in a time slot between the first time slot and the fifth time slot.

[0195] For the third cell, the UE detects the first, second, and third DL DCI formats that schedule corresponding PDSCH transmissions in the third, fourth, and sixth time slots of the associated time slot set. The first, second, and third DL DCI formats include HARQ-ACK mapping fields with corresponding values ​​of 1, 2, or 3. The UE cannot determine that the UE failed to detect the DL DCI format in the eighth time slot, but the UE generates a correct HARQ-ACK codebook by placing NACK as the last element because the HARQ-ACK codebook has a size of 4.

[0196] Using the HARQ-ACK MAP field, the UE may determine the position of the HARQ-ACK information in the HARQ-ACK codebook for each time slot for the second and third cells. When, for the same time slot association group, the UE detects a first DL DCI format with a first HARQ-ACK MAP field value i1 and a second DCI format with a second HARQ-ACK MAP value i2 and i2-i1>1, the UE places i2-i1-1 NACK values ​​in the HARQ-ACK codebook between the position corresponding to the first DL DCI format and the position corresponding to the second DL DCI format.

[0197] The UE also places NACK values ​​in the HARQ-ACK codebook at all positions after the position corresponding to the DL DCI format with the maximum HARQ-ACK mapping value (when this value is less than the HARQ-ACK codebook size). The UE can combine the three separate HARQ-ACK codebooks 1350 for each cell based on the cell index. Other combination orders are also possible. For example, the UE can combine the HARQ-ACK codebooks for the three cells based on the slot index starting from the cell with the lowest index (the first cell), where the HARQ-ACK information for two slots of the second or third cell is combined with the HARQ-ACK information for one slot of the first cell.

[0198] Instead of including the counter DAI field and the total DAI field or instead of including the HARQ-ACK map field, the DL DCI format for scheduling PDSCH transmission may include a HARQ process set field indicating the number of HARQ processes for the UE to report HARQ-ACK information. The UL DCI format for scheduling PUSCH transmission may also include this field. The function of the HARQ process set field may be cell-specific or cell-universal. For the cell-specific function, the HARQ process set field indicates to the UE the HARQ process for the UE to report the corresponding HARQ-ACK information associated with the PDSCH transmission on the cell, and the value of the HARQ process set field may be different in the DCI formats scheduling PDSCH transmission on different cells.

[0199] For cell-wide functionality, the HARQ process set field indicates to the UE the HARQ process used to report the corresponding HARQ-ACK information associated with PDSCH transmissions on all configured cells, and the UE expects the value of the HARQ process set field to be the same in DL DCI formats scheduling PDSCH transmissions on different cells. For example, the cell-wide functionality may be for CGs with the same slot duration for PDSCH transmissions. For example, the functionality of the HARQ process set field may be cell-specific when the field is in a DL DCI format and cell-wide when the field is in a UL DCI format.

[0200] When the UE is configured to support a total of M for cell c by UE capacity or gNB configuration c When there are multiple DL HARQ processes, the field in the DL DCI format for scheduling PDSCH transmission on cell c can indicate M c A subset of DL HARQ processes, possibly including all M c DL HARQ process, for UE to report corresponding HARQ-ACK information. c = 16 DL HARQ processes, a 3-bit field can be indicated to the UE to report M c = 8 combinations of HARQ-ACK for 16 HARQ processes. The 8 combinations can be configured from the gNB to the UE via higher layer signaling.

[0201] For example, one combination may correspond to reporting HARQ-ACK information for all DL HARQ processes. c When HARQ-ACK is sent to multiple DL HARQ processes, the field indicating the number of HARQ processes can be omitted from the DCI format. c Each of the DL HARQ processes initializes a HARQ-ACK codebook with a NACK value, and for the HARQ process with erroneous data TB detection, the UE changes the corresponding NACK value to an ACK value. In order to improve the scheduler flexibility of allocating PDSCH transmission using consecutive HARQ processes, the UE can separately transmit the HARQ-ACK information corresponding to the retransmission of the data TB in the HARQ-ACK information corresponding to the initial transmission of the data TB, as indicated by the value of the redundancy version (RV) field in the corresponding DL DCI format.

[0202] Figure 14 An exemplary process 1400 is shown for a UE configured with DL CA operation on three cells to send HARQ-ACK information for multiple DL HARQ processes per cell according to an embodiment of the present disclosure. Figure 14 The illustrated embodiment of process 1400 for a UE configured with DL CA operation on three cells to transmit HARQ-ACK information for multiple DL HARQ processes per cell is for illustration purposes only. Other embodiments may be used without departing from the scope of the present disclosure.

[0203] The gNB configures, to the UE through higher layer signaling, a first configuration of a HARQ process set for the first cell 1410 with a first time slot duration for PDSCH transmission and a second configuration of HARQ process sets for the first cell 1420 and the third cell 1430 with a second time slot duration for PDSCH transmission, wherein the first time slot duration is twice the second time slot duration. For example, for 16 HARQ processes, the configuration may include 8 HARQ process sets with corresponding HARQ process numbers {1, 2}, {3, 4}, {5, 6}, {7, 8}, {9, 10}, {11, 12}, {13, 14}, and {15, 16} for the first cell and {1, 2, 3, 4}, {3, 4, 5, 6}, {5, 6, 7, 8}, {7, 8, 9, 10}, {9, 10, 11, 12}, {11, 12, 13, 14}, {13, 14, 15, 16}, and {15, 16, 1, 2} for the second and third cells. Different DL DCI formats may indicate different HARQ process sets. For example, the HARQ-ACK information in the HARQ-ACK codebook may be arranged first according to the cell number and then according to the HARQ process number.

[0204] In the first cell 1410, the UE detects first and third DL DCI formats that schedule corresponding PDSCH transmissions in the second and fourth time slots of the associated time slot set, and the UE fails to detect a third DL DCI format that schedules PDSCH transmissions in the third time slot of the time slot set 1440 (in which the UE sends an associated HARQ-ACK codebook in the same time slot). The first DL DCI format may include a HARQ process set field indicating a first HARQ process set {1, 2}, and the second and third DL DCI formats may include a HARQ process set field indicating a fourth HARQ process set {7, 8}.

[0205] The UE generates an HARQ-ACK codebook with HARQ-ACK information for HARQ process numbers {1, 2, 7, 8} and places a NACK value for each HARQ process number (1 and 7) for which the UE fails to detect a DL DCI format for receiving a PDSCH. In the second cell 1420, the UE detects the first, third, fourth, fifth, and sixth DL DCI formats for corresponding PDSCH transmissions scheduled in the first, third, fifth, seventh, and eighth time slots of the associated time slot set, and fails to detect the second DL DCI format for PDSCH transmission scheduled in the second time slot of the time slot set in which the UE sends the associated HARQ-ACK codebook in the same time slot.

[0206] The first, second, and sixth DL DCI formats may include an HARQ process set field indicating the fifth HARQ process set {9, 10, 11, 12}, and the third, fourth, and fifth DL DCI formats may include an HARQ process set field indicating the seventh HARQ process set {13, 14, 15, 16}. The UE generates an HARQ-ACK codebook having HARQ-ACK information for HARQ process numbers {9, 10, 11, 12, 13, 14, 15, 16} and places a NACK value for each HARQ process number (10, 12, and 15) for which the UE does not receive a PDSCH. In the third cell 1430, the UE detects the first, second, third, fourth, and fifth DL DCI formats for corresponding PDSCH transmissions scheduled in the second, third, fourth, fifth, and sixth time slots of the associated time slot set, and the UE fails to detect the second DCI format for PDSCH transmission scheduled in the seventh time slot of the time slot set (wherein the UE sends the associated HARQ-ACK codebook in the same time slot).

[0207] The first, second, and fifth DL DCI formats may include an HARQ process set field indicating a third HARQ process set {5, 6, 7, 8}, and the third, fourth, and sixth DL DCI formats may include an HARQ process set field indicating a sixth HARQ process set {11, 12, 13, 14}. The UE generates a HARQ-ACK codebook having HARQ-ACK information for HARQ process numbers {5, 6, 7, 8, 11, 12, 13, 14} and places a NACK value for each HARQ process number (5, 12, and 13) for which the UE does not receive a PDSCH. The combined HARQ-ACK codebook includes HARQ process numbers {1, 2, 7, 8} for the first cell, {9, 10, 11, 12, 13, 14, 15, 16} for the second cell, and {5, 6, 7, 8, 11, 12, 13, 14} for the third cell 1450.

[0208] In some embodiments, the transmission power of a UE configured for UL CA operation is determined, where the DL transmission duration (referred to as slot duration) or the UL transmission duration (slot duration) may be different among cells (or carriers). For simplicity of description, it is assumed that the cells are arranged into two groups; DL transmission or UL transmission in the corresponding first group DL cells or UL cells have a first duration and in a corresponding second group DL cells or The DL transmission of the DL cell does not need to have the same duration as the UL transmission time slot of the associated UL cell. Extension to more than two cell groups (CGs) can follow a similar principle. The first time slot duration T1 is an integer P>1 times longer than the second time slot duration T2, that is, T1=P·T2. When P=1, the power allocation method can be the same as the CA operation between cells with the same time slot duration. In the following, Denotes a linear value of the maximum configured transmission power between a time slot pair (i1, i2) or, in general, two overlapping transmissions with respective durations i1 and i2.

[0209] In some embodiments, a first time slot having a duration i1 and a second time slot having a duration i2 have the same starting point, and all UL transmissions convey data in the corresponding PUSCH without any UCI transmission or SRS transmission. In the following, it is assumed that when the UE does not have an UL transmission on the cell during the time slot, the corresponding transmission power is zero.

[0210] In one embodiment of power allocation from the UE, whether from The first CG (CG1) of the cell is still on the cell from On a cell of the second CG (CG2) of a cell, each PUSCH transmission power can be scaled by the same factor in the first time slot i1 and in the second time slot i2, so that where w c (i1)=w c (i2), unless for some cells the resulting transmission power is too low and the UE may then set w c (i1)=0 or w c (i2)=0.

[0211] For the second time slot i2+j,0<j≤P-1 PUSCH transmission on cell c, each PUSCH transmission power on cell c exist When the power is determined according to the corresponding power control process or By factoring w c (i2+j) scales each such PUSCH transmission power so that To determine. When c (i1)=1. It is possible that for all values ​​of i2+j, 0<j≤P-1, this is the same.

[0212] Figure 15 It shows that according to an embodiment of the present disclosure, when the first time slot i1 and the second time slot i2 start at the same time and i1=P·i2, the UE determines that the first time slot i1 is cells and in the second time slot i2+j,0≤j≤P-1 Example method 1500 for determining PUSCH transmission power on a cell. Figure 15 As shown, when the first time slot i1 and the second time slot i2 start at the same time and i1=P·i2, the UE determines that cells and in the second time slot i2+j,0≤j≤P-1 The embodiment of the method 1500 for determining the PUSCH transmission power on each cell is for illustration purposes only. Other embodiments may be used without departing from the scope of the present disclosure.

[0213] In step 1510, the UE determines the power from the first time slot i1 according to the corresponding power control process. The power of each PUSCH transmission on each cell c of the cell (CG1) and in the second time slot i2 from The power of each PUSCH transmission on each cell c of the cell (CG2) The second time slot i2 starts at the same time as the first time slot i1. The duration of the first time slot is an integer P times longer than the duration of the second time slot. In step 1520, the UE c (i2)≤1 to scale each determined power so that And the corresponding PUSCH is sent with scaled power. c The value of (i2) can be the maximum value that achieves the previous conditions, including w c (i2)=1, which means no scaling, and for some cells, the UE may set w c (i2) = 0, for example, when the generated scaling power is too small. In the subsequent time slot i2+j, 0 < j ≤ P-1, in step 1530, the UE determines the power from the corresponding power control process. The power of each PUSCH transmission on each cell And in step 1540, the UE uses power In from The PUSCH is sent on cell c of the cell, so that

[0214] Figure 16 The PUSCH transmission power in the first time slot i1 is shown according to an embodiment of the present disclosure when time slot i1 and time slot i2 start at the same time and i1=P·i2. Example total PUSCH transmission power 1600 on the cell and in the second time slots i2 and i2+1 The total PUSCH transmission power on the cell. Figure 16 The PUSCH transmission power in the first time slot i1 is shown based on the fact that time slot i1 and time slot i2 start at the same time and i1=P·i2. Example total PUSCH transmission power 1600 on the cell and in the second time slots i2 and i2+1 The embodiment of the total PUSCH transmission power on the cells is for illustration purposes only. Other embodiments may be used without departing from the scope of the present disclosure.

[0215] The UE determines the power from the individual The power of each PUSCH transmission on each cell c of the cell and in the second time slot i2 from The power of each PUSCH transmission on each cell c of the cells The second time slot i2 starts at the same time as the first time slot i1. The duration of the first time slot is twice the duration of the second time slot. 1610. The UE transmits PUSCH on the corresponding cell according to w c (i2) to scale each and each Make 1620. In the next second time slot i2+1, the UE determines the power from The power of each PUSCH transmission on each cell And the UE uses power In from PUSCH is sent on cell c of the cell, because 1630. Although in the first time slot i1 from PUSCH transmission on cell c of cells has reduced power Because w c (i2) < 1, and the total transmission power in the second time slot i2+1 is less than the maximum available power However, in the portion of the first time slot i1 that overlaps with i2+1, the UE does not increase the The PUSCH transmission power on any cell c of the cells.

[0216] The above power distribution embodiment (also Figure 16 The disadvantage of the method shown in FIG5 is that the PUSCH transmission power is reduced in the first time slot i1 even when there is still available transmission power after the initial second time slot i2, for example when in the second time slot i2+1, The total transmission power on the cell Make hour.

[0217] In one embodiment of power allocation from the UE, power is first prioritized to the UE in the first time slot i1. PUSCH transmission on each cell, and the remaining power (if any) is allocated to the second time slot i2+j, 0≤j≤P-1 PUSCH transmission on the cell. The first time slot i1 comes from The power of each PUSCH transmission on each corresponding cell c of the cells It can be determined according to the corresponding power control process and can be adjusted according to w when necessary. c (i1) is further scaled so that when When c (i1) = 1. The second time slot i2+j from The power of each PUSCH transmission on each corresponding cell c of the cells It can be determined according to the corresponding power control process and can be adjusted according to the w c (i2+j) is further scaled so that

[0218] when When the second time slot i2+j The PUSCH transmission on each cell can be reduced. When there is no PUSCH transmission on a cell, the above embodiments are equivalent.

[0219] Figure 17 It shows that according to an embodiment of the present disclosure, when the first time slot i1 and the second time slot i2 start at the same time and i1=P·i2, the UE determines that the first time slot i1 is cells and in the second time slot i2+j,0≤j≤P-1 Another exemplary method 1700 for PUSCH transmission power on a cell. Figure 17As shown, when the first time slot i1 and the second time slot i2 start at the same time and i1=P·i2, the UE determines that cells and in the second time slot i2+j,0≤j≤P-1 The embodiment of the method 1700 for determining the PUSCH transmission power on each cell is for illustration purposes only. Other embodiments may be used without departing from the scope of the present disclosure.

[0220] In step 1710, the UE determines the power from the first time slot i1 according to the corresponding power control process. The power of each PUSCH transmission on each cell c of the cells And in step 1720, the corresponding actual PUSCH transmission power is determined Make

[0221] when When c (i1) = 1. In step 1730, the UE determines the power from the second time slot i2+j according to the corresponding power control process. The power of each PUSCH transmission on each cell c of the cells 0≤j≤P-1, and the corresponding actual PUSCH transmission power is determined in step 1740 Make

[0222] Figure 18 The PUSCH transmission power in the first time slot i1 is shown according to an embodiment of the present disclosure when time slot i1 and time slot i2 start at the same time and i1=P·i2. Example total PUSCH transmission power 1800 on the cell and in the second time slots i2 and i2+1 The total PUSCH transmission power on the cell. Figure 18 The PUSCH transmission power in the first time slot i1 is shown based on the fact that time slot i1 and time slot i2 start at the same time and i1=P·i2. Example total PUSCH transmission power 1800 on the cell and in the second time slots i2 and i2+1 The embodiment of the total PUSCH transmission power on the cells is for illustration purposes only. Other embodiments may be used without departing from the scope of the present disclosure.

[0223] The second time slot i2 starts at the same time as the first time slot i1. The duration of the first time slot is twice the duration of the second time slot. The UE determines the power from the first time slot i1 according to the corresponding power control process. The power of each PUSCH transmission on each cell c of the cells And determine the actual power of each PUSCH transmission Make because Therefore w c (i1) = 1. The UE determines the power from the second time slot i2 according to the corresponding power control process. The power of each PUSCH transmission on each cell c of the cells because 1810, so the UE determines the second time slot i2 from The actual power of each PUSCH transmission on each cell c Make 1820. The UE determines the power from the second time slot i2+1 according to the corresponding power control process. The power of each PUSCH transmission on each cell c of the cells

[0224] because Therefore, the UE determines the second time slot i2+1 from The actual power of each PUSCH transmission on each cell c 1830.

[0225] In the above embodiments of two opposite methods of prioritizing power, The cells of the cells are given according to the first method with the cells from or given priority according to the second method over the cells from The corresponding power allocation principles can be combined to enable the network to control the power from The cells of the cells and the cells from The network can configure the power allocation priority of the cell from the UE through higher layer signaling. The priority factor Q for transmissions on cells and for The priority factor of the transmission on the cell of the cell is 1-Q. For example, for the above embodiment, Q=0.5, while for Q=1. Then, when When the UE can determine the power scaling factor w c (i1)=w c (i2), so that

[0226] In one embodiment of power allocation by the UE, whether from The community is still coming from Each PUSCH transmission power is scaled by the same factor across the cells so that during each second slot duration, the total transmission power is less than or equal to As a result, the first time slot i1 from The actual PUSCH transmission power on each corresponding cell c of the cells varies depending on the overlapping second time slot i2+j, 0≤j≤P-1, and the power from each second time slot i2+j The actual PUSCH transmission power on each corresponding cell c of the cells does not change. As discussed later, this can be beneficial to The power allocation of PUCCH or PRACH transmission on cell c among the cells is prioritized.

[0227] In each second time slot i2+j, determine the The actual PUSCH transmission power on each corresponding cell c of the cells and from The actual PUSCH transmission power on each corresponding cell c of the cells Make When in the second time slot i2+j, w c (i2+j)=1. It is also possible to use instead of The third power allocation is intended to enable the UE to utilize all available transmission power in each second time slot i2+j. In general, in the second time slot i2+j, the above embodiment results in The total PUSCH transmission power.

[0228] However, when there is a variation in the actual PUSCH transmission power during the first time slot i1, the reception reliability of the data signal may be reduced in the case of QAM-based modulation. Such degradation can be alleviated at the reception point by demodulating the data information symbol or UCI symbol in the first time slot symbol based on the DMRS transmitted in the second time slot symbol with the same transmission power as the first time slot symbol using channel estimation. For example, when the signal from When a timeslot on a cell of a cell has a duration of 1 msec, 1 timeslot symbol with DMRS in the first 0.5 msec, and 1 timeslot symbol with DMRS in the last 0.5 msec, a PUSCH power change may occur between the first 0.5 msec and the last 0.5 msec, while the PUSCH transmit power is the same during the first 0.5 msec and the last 0.5 msec. The receiving point may then demodulate the data information symbols or UCI symbols in the first 0.5 msec using a channel estimate obtained only from the DMRS in the first 0.5 msec, and demodulate the data information symbols or UCI symbols in the last 0.5 msec using a channel estimate obtained only from the DMRS in the last 0.5 msec, and at least when the receiving point can anticipate that UE transmit power limitation may have occurred, the receiving point may avoid filtering the DMRS in the first 0.5 msec using the DMRS in the last 0.5 msec in the process of obtaining the channel estimate.

[0229] Figure 19 It shows that according to an embodiment of the present disclosure, when the first time slot i1 and the second time slot i2 start at the same time and i1=P·i2, the UE determines that cells and in the second time slot i2+j,0≤j≤P-1

[00106] Another exemplary method 1900 for controlling PUSCH transmission power on a cell. Figure 19 As shown, when the first time slot i1 and the second time slot i2 start at the same time and i1=P·i2, the UE determines that cells and in the second time slot i2+j,0≤j≤P-1 The embodiment of the method 1900 for determining the PUSCH transmission power on each cell is for illustration purposes only. Other embodiments may be used without departing from the scope of the present disclosure.

[0230] In step 1910, the UE determines the power from the first time slot i1 according to the corresponding power control process. The power of each PUSCH transmission on each cell c of the cells and in the second time slot i2+j,0≤j≤P-1 from The power of each PUSCH transmission on each cell c of the cells The duration of the first time slot is an integer P times longer than the duration of the second time slot. The second time slot i2 starts at the same time as the first time slot i1. In each second time slot i2+j, in step 1920, the UE c (i2+j)≤1 to scale each determined power so that And the corresponding PUSCH is sent with scaled power.c The value of (i2+j) may be the maximum value that achieves the previous condition, and for some cells, the UE may set w c (i2)=0, for example when the generated scaling power is too small.

[0231] Figure 20 The PUSCH transmission power in the first time slot i1 is shown according to an embodiment of the present disclosure when time slot i1 and time slot i2 start at the same time and i1=P·i2. Example total PUSCH transmission power 2000 on the cell and in the second time slots i2 and i2+1 The total PUSCH transmission power on the cell. Figure 20 The PUSCH transmission power in the first time slot i1 is shown based on the fact that time slot i1 and time slot i2 start at the same time and i1=P·i2. Example total PUSCH transmission power 2000 on the cell and in the second time slots i2 and i2+1 The embodiment of the total PUSCH transmission power on the cells is for illustration purposes only. Other embodiments may be used without departing from the scope of the present disclosure.

[0232] The UE determines the power from the individual The power of each PUSCH transmission on each cell c of the cell and in the second time slot i2+j,0≤j≤1 from The power of each PUSCH transmission on each cell c of the cells The second time slot i2 starts at the same time as the first time slot i1. The duration of the first time slot is twice the duration of the second time slot. In the second time slot i2, 2010. UE transmits PUSCH on the corresponding cell according to w c (i2) to scale each and each Make 2020. In the next second time slot i2+1, the UE determines the power from The power of each PUSCH transmission on each cell And the UE uses power In from The PUSCH is sent on cell c of the cell with a power of In from PUSCH is sent on cell c of the cell, because 2030. Therefore, the UE uses power And during the second time slot i2+1, the power In from PUSCH is sent in cell c of the cells.

[0233] In one embodiment of power allocation by the UE, in order to ensure that the minimum transmission power is always available to the UE for Transmissions on the cell (CG1) and from For transmissions on a cell (CG2), the gNB may configure the UE with a first minimum available power for transmissions in CG1 and a second minimum available power for transmissions in CG2. The configuration may be performed by increasing the first percentage of the minimum available transmission power δ CG1 Allocate to CG1 and set the second percentage of the minimum available transmission power δ CG2 Assigned to CG2, where δ CG1 +δ CG2 ≤1. When the UE transmits in CG1 in time slot i1 and transmits in CG2 in time slot i2, the UE may transmit at least The power is used for transmission on CG1 cell and at least Therefore, when the power allocation for transmission on CG1 takes precedence over the power allocation for transmission on CG2, the available power on CG1 in time slot i1 can be equal to in is the total power used for PUSCH transmission on CG2.

[0234] The applicability of the configuration of the minimum available power for CG1 and CG2 may be limited to apply only to PUSCH transmissions and SRS transmissions and may not apply to PRACH or PUCCH transmissions. For example, in the case where power allocation to PRACH transmissions takes precedence over power allocation to any other transmissions, when the UE transmits PUSCH and PRACH on CG1 in time slot i1 and transmits PUSCH and PRACH on CG2 in time slot i2, the UE may allocate up to of power is used for PUSCH transmission in CG1.

[0235] In case power allocation for PUCCH transmission or PUSCH transmission with UCI takes precedence over power allocation for any other transmission except PRACH transmission, when power allocation for PUCCH or PUSCH transmission with UCI in CG1 takes precedence over power allocation for PUCCH or PUSCH transmission with UCI in CG2, e.g. due to higher priority of UCI type in CG1, the UE may allocate up to of power is used for PUCCH or PUSCH transmission with UCI in CG1. Otherwise, in case that power allocation for PUCCH or PUSCH transmission with UCI in CG2 takes precedence over power allocation for PUCCH or PUSCH transmission with UCI in CG1, up to of power is used for PUCCH transmission in CG1.

[0236] In cases where power allocation for PUCCH or PUSCH transmission with UCI in CG1 and PUCCH or PUSCH transmission with UCI in CG2 has equal priority, for example when the same UCI type is transmitted in both CGs and one CG does not take precedence over the other, the power available for PUCCH transmission in CG1 shall be At that time exist When α c (j)<1, otherwise Make Similarly, the power available for PUCCH transmission in CG2 is At that time exist At that time , otherwise Make

[0237] The same expression is expressed by Replace the above expression Applicable to PUSCH transmission with UCI. The same expression is obtained by using Replace the above expression Also applicable to PUSCH with prioritized data services. It is also possible to prioritize UCI transmissions in one of the CGs even when UCI types with the same highest priority are sent by taking into account several criteria, such as UCI payload, presence of additional UCI types, power reduction value relative to the power value determined according to the corresponding power control formula, or CG index. For example, when a UE sends HARQ-ACK and A-CSI in PUSCH on a CG1 cell and HARQ-ACK in PUSCH or PUCCH on a CG2 cell, power allocation may be prioritized to the CG1 cell. For example, when a UE sends HARQ-ACK with 1-bit payload on one cell and with 20-bit payload on another cell, the PUCCH transmission with the smaller payload may be prioritized because it requires less power.

[0238] The following considers UCI multiplexing in a single PUSCH transmission, but the description can be extended in a straightforward manner when UCI is multiplexed in a PUCCH or when UCI is multiplexed in multiple PUSCH transmissions, or when power allocation is prioritized for PUSCH transmissions that convey configured data service types. For example, when UCI is multiplexed in a PUCCH, the PUSCH with the multiplexed UCI can be replaced by the PUCCH with the multiplexed UCI, and repetition of the corresponding description is omitted for brevity. For example, UCI associated with a PDSCH transmission using a first duration can be multiplexed in one or more PUSCH transmissions that also use the first duration, and UCI associated with a PDSCH transmission using a second duration can be multiplexed in one or more PUSCH transmissions that also use the second duration. A first time slot i1 having the first duration and a second time slot i2 having the second duration have the same starting point, and all UL transmissions convey data in the corresponding PUSCH without any SRS transmission.

[0239] When the UE is in cell c UCI When multiplexing UCI in the PUSCH transmission in the first time slot i1 on the UE, the UE prioritizes the power allocation for the PUSCH transmission and determines the corresponding transmission power according to the corresponding power control process. UE uses any one of the above embodiments Replace the corresponding The transmission power is then allocated to the remaining PUSCH transmissions.

[0240] When the UE is in cell c UCI When multiplexing UCI in the PUSCH transmission in the second time slot i2 on the UE, the UE prioritizes the power allocation for the PUSCH transmission and determines the corresponding transmission power according to the corresponding power control process. UE is used for the above embodiment replace Parameters or in the above examples replace The transmission power is then allocated to the remaining PUSCH transmissions.

[0241] When the UE is in cell c UCI When multiplexing UCI in a PUSCH transmission in the second time slot i2+j, 0<j≤P-1 on φi2+j, 0<j≤P-1, whether the UE prioritizes power allocation for PUSCH transmission depends on the PUSCH power allocation embodiment.

[0242] For the power allocation embodiment, since the power from the first time slot i1 The power of the PUSCH transmission on the cell c is set before the second time slot i2+j and remains unchanged for the duration of the first time slot i1 including the second time slot i2+j, so for cell c UCI The power allocation of the PUSCH transmission with UCI in the second time slot i2+j on the same network does not take precedence over the power allocation of the PUSCH transmission with UCI from The power allocation for PUSCH transmission without UCI in the first slot i1 on the cell i of the cell i is thus determined by represents the power determined by the UE for PUSCH transmission on cell c in time slot i2+j according to the corresponding power control process. UCI The actual transmission power on can be determined as

[0243] according to , for the second time slot i2+j from For each cell c≠c UCI The power of the remaining PUSCH transmissions on where w c (i2+j)≤1 may be the maximum scaling factor that achieves the previous condition.

[0244] For the above power allocation embodiment, for cell c UCI The PUSCH transmission with UCI in the second time slot i2+j on φ and the power allocation for the remaining PUSCHs are the same as previously described for the above power allocation embodiment.

[0245] In some embodiments of power allocation, for cell c UCI The power allocation of the PUSCH transmission with UCI in the second time slot i2+j on the same network may take precedence over the power allocation of the PUSCH transmission with UCI in the first time slot i1. The cell of the cell or the second time slot i2+j from All other PUSCH transmissions on the cell of the cell. Determine the second time slot period i2+j from The actual PUSCH transmission power on each corresponding cell c of the cells and from The actual PUSCH transmission power on each corresponding cell c of the cells Make

[0246] When the first time slot i1 There is UCI multiplexing in the first PUSCH transmission or the first PUCCH transmission on the cell of the cell, and in the second time slot i2 according to the above embodiment for power allocation or in any second time slot i2+j (0≤j≤P-1) according to the power prioritization embodiment. When UCI is also multiplexed in the second PUSCH transmission or the second PUCCH transmission on a cell of the same cell, the power prioritization between the first PUSCH transmission or the first PUCCH transmission and the second PUSCH transmission or the second PUCCH transmission may take into account the UCI type. For example, the UCI type prioritization may be HARQ-ACK / SR>RI>CSI. If the same UCI type with the highest priority is multiplexed in both the first PUSCH transmission or the first PUCCH transmission and the second PUSCH transmission or the second PUCCH transmission, the power prioritization may be predetermined for the first PUSCH transmission or the first PUCCH transmission associated with the longer time slot duration or for the second PUSCH transmission or the second PUCCH transmission associated with the shorter time slot duration. For example, power allocation may be preferentially performed for the PUSCH transmission or the PUCCH transmission with the longer time slot duration.

[0247] The UE may prioritize power allocation for PRACH transmissions over all other transmissions. When the UE receives the PRACH in the first time slot i1 of the cell c, the UE prioritizes the power allocation for the PRACH transmission and determines the corresponding transmission power according to the corresponding power control process. The UE is used according to any of the above embodiments. Replace the corresponding The transmission power is then allocated to the remaining transmissions. When the PRACH in the second time slot i2 of the cell c is transmitted, the UE prioritizes the power allocation for the PRACH transmission and determines the corresponding transmission power according to the corresponding power control process. UE is used for the above embodiment replace Parameters or in the above examples replace The transmission power is then distributed to the remaining transmissions.

[0248] When the UE sends When the PRACH in the second time slot i2+j, 0<j≤P-1 of cell c is transmitted, the UE may prioritize the power allocation for the PRACH transmission over the power allocation from the second time slot i2+j in the cell c. When the UE sends PRACH, it reduces the number of When the power of continuous transmission on a cell on a cell is reduced (including reduced to zero), the UE may transmit at the power as determined according to the corresponding power control procedure. To send PRACH. When the UE does not reduce the first time slot i1 from When the continuous transmission power on the cell of the UE is By using replace To determine the second time slot i2+j from The remaining transmission power on the cell of the cell.

[0249] The power allocation for SRS transmission may have the lowest priority. According to the corresponding power control process, the UE determines the SRS transmission power on cell c. The UE can determine the SRS transmission power as in is the total power that the UE allocates to transmissions of other channels on all cells in the same symbol as the SRS transmission symbol. The SRS transmissions on the cells of the When the SRS transmissions on the cells overlap, such as in the last symbol of slot i1 and slot i2+P-1, The UE needs to prioritize power allocation among SRS transmissions. In a first example, overlapping SRS transmissions may have the same priority regardless of the corresponding cell, and the same power scaling may be applied to each SRS transmission power to obtain the actual SRS transmission power. Make The scaling factor w c For the exception of All cells except the very small cell are the same, and the UE can c Set to zero.

[0250] One or more first PUSCH transmissions from a UE on the corresponding one or more first cells may convey a first traffic type, and one or more second PUSCH transmissions from a UE on the corresponding one or more second cells may convey a second traffic type. The first and second cells may be in the same CG or in different CGs, and the first and second PUSCH transmissions may have the same duration or different durations. For example, the first traffic type may be associated with an ultra-reliable low-latency communication (URLLC) service, and the second traffic type may be associated with a mobile broadband (MBB) service.

[0251] When the UE sends a first number of PUSCHs conveying a first traffic type and a second number of PUSCHs conveying a second traffic type in the same timeslot, the gNB may configure the UE to prioritize power allocation for the first traffic type over the second traffic type, for example, in order to prioritize the service reliability requirement of the first traffic type. The prioritization of power allocation needs to apply not only to data transmission of the first traffic type, but also to UCI transmissions or RA preamble transmissions associated with the first traffic type. For example, the UE may determine the traffic type at the physical layer based on a higher layer configuration that depends on the traffic type or based on a parameter set (such as transmission duration) used to transmit the associated PUSCH (either explicitly by a field in the DL DCI format or UL DCI format as previously described or implicitly by a DL DCI format size or UL DCI format size), where, for example, a DL DCI format or UL DCI format scheduling URLLC traffic has a smaller size than a DL DCI format or DCI format scheduling MBB traffic. Subsequently, the UE may determine the transmission power for signaling associated with the first traffic type according to the corresponding power control procedure and determine the transmission power for signaling associated with the first traffic type according to the corresponding power control procedure but using instead of A transmission power for signaling associated with the second traffic type is determined as the available transmission power during the time slot.

[0252] It is also possible to prioritize power allocation for a first traffic type over UCI transmissions (in PUCCH or PUSCH) for a second traffic type, or over PRACH transmissions on at least a cell configured to serve only the second traffic type. An exception to this may be when PUCCH transmissions are orthogonally multiplexed with other PUCCH transmissions, and the power variation results in non-orthogonal multiplexing, such as for PUCCH formats 1 / 1a / 1b / 3. Power allocation for PUSCH transmissions may also be prioritized over power allocation for PUCCH transmissions associated with the same traffic type, as achieving data TB BLER may take precedence over achieving UCI BLER. For example, whether such prioritization applies may be explicitly configured to the UE by the gNB. Typically, the gNB may configure the UE (via higher layers or via a DCI format) to prioritize power allocation between UCI type and data type.

[0253] Figure 21 An exemplary power allocation 2100 of a UE to different traffic types according to an embodiment of the present disclosure is shown. Figure 21 The embodiment of UE power allocation 2100 for different traffic types shown is for illustration purposes only. Other embodiments may be used without departing from the scope of the present disclosure.

[0254] In step 2110, the UE determines power for transmission of data, UCI, or a random access preamble associated with a first traffic type and power for transmission of data associated with a second traffic type during a time slot, wherein the second traffic type has a higher priority than the first traffic type. In step 2120, the UE determines whether a total transmission power for transmissions associated with the first traffic type and the second traffic type is greater than a configured maximum transmission power during the time slot. When the maximum transmission power for transmissions associated with the first traffic type and the second traffic type is greater than the configured maximum transmission power during the time slot, in step 2130, the UE prioritizes power allocation for transmission of data of the second traffic type; otherwise, in step 2140, the UE transmits data, UCI, or a random access preamble associated with the first traffic type and data associated with the second traffic type at the corresponding determined powers.

[0255] Typically, a PDCCH, PDSCH, PUCCH or PUSCH transmission may start at any symbol. In addition, at least a PDSCH transmission or a PUSCH transmission may have a dynamically changing duration ranging from one symbol to one or more time slots. Subsequently, transmissions from the UE may partially overlap in time and the UE cannot determine the power used for all overlapping transmissions at the same time. In addition, the time between UL DCI format detection and the associated PUSCH transmission may vary, and the UE may not always be able to determine the available power at the time of the PUSCH transmission because, after UL DCI format detection, the UE may be configured to make additional transmissions when making a PUSCH transmission. Similar arguments apply to the time between DL DCI format detection, the associated PDSCH reception and the associated HARQ-ACK transmission in the PUCCH. In addition, the PDCCH transmission of the UL DCI format that conveys the scheduled PUSCH transmission may have an arbitrary periodicity ranging from one symbol to tens of symbols.

[0256] In order for the UE to determine the power of the first UL transmission at time T, the UE needs to first determine the available power for the first UL transmission at time T. Before determining the power for the first UL transmission, the UE may obtain the power at time T from Subtract N extending to time T from ongoing The power of the continuous transmission and the N determined by the UE next The UE can then determine the power of an upcoming (but not currently in progress) transmission. Or by adding all N that the UE has determined at the required time T known The transmission is combined to determine When multiple transmissions start at time T, the UE can Distributed among multiple transmissions as previously described, and power allocation prioritization according to information type can be applied.

[0257] For operation with two CGs and minimum guaranteed power per CG, the available power at the first CG needs to take into account the power used in the second CG and the guaranteed power at the second CG. For example, the UE can determine the available transmission power in the first CG as in Equation 3.

[0258] [Equation 3]

[0259]

[0260] Figure 22 An exemplary determination of available transmission power by a UE at time T is shown when the UE determines the total power of all previous transmissions before the power of a later transmission according to exemplary embodiments of the present disclosure. Figure 22 The embodiment shown for determination of available transmission power at time T is for illustration purposes only. Other embodiments may be used without departing from the scope of the present disclosure.

[0261] The UE first determines a power 2210 for a first UL transmission having a duration of 5 time units, the first UL transmission starting at time unit 2 and having a duration of 5 time units. A time unit may be one symbol, multiple symbols (such as one time slot), etc. For example, the UL transmission may be a PUSCH transmission or a PUCCH transmission. The UE next determines a power 2220 for a second UL transmission having a duration of 3 time units, the second UL transmission starting at time unit 5 and having a duration of 3 time units. The UE next determines a power 2230 for a third UL transmission having a duration of 1 time unit, the third UL transmission starting at time unit 6 and having a duration of 1 time unit. The UE next determines an available transmission power 2240 for a fourth UL transmission starting at time unit 6 (regardless of the corresponding duration) as the maximum transmission power configured by the UE at time unit 6. 2250 and the total transmission power of the known transmission at time unit 6 The difference between the third and fourth UL transmissions starts at the same time unit, but the UE may determine the power for the third UL transmission before the power for the fourth UL transmission, for example because the UE detects the DCI format configuring the third UL transmission before detecting the DCI format configuring the fourth UL transmission. The UE's detection of the DCI format configuring any of the above UL transmissions may be in any order, but typically they are in the same order as the determination of the corresponding transmission powers and durations. It is also possible that the UE first determines the power of the third UL transmission after determining the intermediate power of the fourth UL transmission, and the UE also determines that the third UL transmission has a higher priority than the fourth UL transmission, and the UE has sufficient time to adjust the power for the fourth UL transmission before time unit 6. In general, the LTE power prioritization rules can be applied when the UE has sufficient time to adjust the power of all UL transmissions starting at the same time unit.

[0262] The above operation can be generalized to multiple CGs with corresponding multiple guaranteed minimum transmission powers. Within the CG, the prioritization rules for power allocation can be similar to LTE operation, and in the case of multiple service types, the data service type can be additionally considered.

[0263] Figure 23 An exemplary determination of available transmission power by a UE at time T is shown when the UE does not determine the total power of all previous transmissions before the power of a later transmission according to exemplary embodiments of the present disclosure. Figure 23 The illustrated embodiment of determination of available transmission power at time T is for illustration purposes only. Other embodiments may be used without departing from the scope of the present disclosure.

[0264] The UE first determines a power 2310 for a first UL transmission having a duration of 5 time units, the first UL transmission starting at time unit 2 and having a duration of 5 time units. A time unit may be one symbol, multiple symbols (such as one time slot), etc. For example, the UL transmission may be a PUSCH transmission or a PUCCH transmission. The UE next determines a power 2320 for a second UL transmission having a duration of 3 time units, the second UL transmission starting at time unit 5 and having a duration of 3 time units. The UE next determines a power 2330 for a third UL transmission having a duration of 1 time unit, the third UL transmission starting at time unit 7 and having a duration of 1 time unit (or any number of time units). The UE next determines an available transmission power 2340 for a fourth UL transmission starting at time unit 6 (regardless of the corresponding duration) as the maximum transmission power configured by the UE at time unit 6. 2350 and the total transmission power of the known transmission reserved at time unit 6 Although the third UL transmission starts after the fourth UL transmission, the UE may determine the power for the third UL transmission before the power of the fourth UL transmission, for example, because the UE detects the DCI format configuring the third UL transmission before detecting the DCI format configuring the fourth UL transmission. Therefore, for the fourth UL transmission starting at time unit 6, the UE considers the actual available power to be less than 1%. 2360. When the fourth transmission has a higher priority than the third transmission and the UE does not have enough time to recalculate the power of the third transmission, the UE may terminate the fourth transmission.

[0265] Although the present disclosure has been described using exemplary embodiments, various changes and modifications may occur to those skilled in the art. The present disclosure is intended to encompass such changes and modifications as fall within the scope of the appended claims.

[0266] Nothing in the description in this application should be read as implying that any particular element, step, or function is an essential element that must be included in the scope of the claims. The scope of the patented subject matter is limited only by the claims.

Claims

1. A method performed by a user equipment (UE) in a communication system, the method comprising: receiving, from a base station, a first configuration relating to a first control channel resource in a first bandwidth part of a cell, the first configuration comprising information relating to a first number of symbols for the first control channel resource and information relating to a first number of physical downlink control channel (PDCCH) candidates for a corresponding control channel element (CCE) level, wherein the first control channel resource is associated with a first search space; receiving, from the base station, a second configuration related to second control channel resources in a second bandwidth part of the cell, the second configuration comprising information related to a second number of symbols for the second control channel resources and information related to a second number of PDCCH candidates for a corresponding CCE level, wherein the second control channel resources are associated with a second search space; Obtaining downlink control information by decoding PDCCH candidates in the first search space based on a first number of PDCCH candidates for a corresponding CCE level, or by decoding PDCCH candidates in the second search space based on a second number of PDCCH candidates for a corresponding CCE level; as well as Downlink data is received from the base station on a physical downlink shared channel (PDSCH) based on the downlink control information.

2. The method according to claim 1, wherein The PDCCH reception on the first search space is in a first time slot subset, and the PDCCH reception on the second search space is in a second time slot subset.

3. The method according to claim 1, further comprising: sending hybrid automatic repeat request acknowledgement (HARQ-ACK) information to the base station in response to the downlink data on a physical uplink control channel (PUCCH) in a time slot; The time slot is identified based on a time slot offset between the PDSCH and the HARQ-ACK feedback included in the downlink control information.

4. The method according to claim 3, wherein: The PUCCH resource is identified based on a PUCCH resource indicator included in the downlink control information.

5. A method performed by a base station in a communication system, the method comprising: sending a first configuration relating to a first control channel resource in a first bandwidth part of a cell to a user equipment (UE), the first configuration comprising information relating to a first number of symbols for the first control channel resource and information relating to a first number of physical downlink control channel (PDCCH) candidates for a corresponding control channel element (CCE) level, wherein the first control channel resource is associated with a first search space; transmitting, to the UE, a second configuration related to second control channel resources in a second bandwidth part of the cell, the second configuration comprising information related to a second number of symbols for the second control channel resources, wherein the second control channel resources are associated with a second search space; Sending downlink control information in the first search space to the UE based on a first number of PDCCH candidates for a corresponding CCE level, or sending downlink control information in the second search space to the UE based on a second number of PDCCH candidates for a corresponding CCE level; as well as Downlink data corresponding to the downlink control information is sent to the UE on a physical downlink shared channel (PDSCH).

6. The method according to claim 5, wherein: The PDCCH reception on the first search space is in a first time slot subset, and the PDCCH reception on the second search space is in a second time slot subset.

7. The method according to claim 5, further comprising: receiving, from the UE, a hybrid automatic repeat request acknowledgement (HARQ-ACK) message in response to the downlink data on a physical uplink control channel (PUCCH) in a time slot; The time slot is associated with a time slot offset between the PDSCH and the HARQ-ACK feedback included in the downlink control information.

8. The method according to claim 7, wherein: The PUCCH resource is associated with a PUCCH resource indicator included in the downlink control information.

9. A user equipment (UE) in a communication system, the UE comprising: transceiver; as well as at least one processor coupled to the transceiver and configured to: receiving, from a base station, a first configuration relating to a first control channel resource in a first bandwidth part of a cell, the first configuration comprising information relating to a first number of symbols for the first control channel resource and information relating to a first number of physical downlink control channel (PDCCH) candidates for a corresponding control channel element (CCE) level, wherein the first control channel resource is associated with a first search space; receiving, from the base station, a second configuration related to second control channel resources in a second bandwidth part of the cell, the second configuration comprising information related to a second number of symbols for the second control channel resources and information related to a second number of PDCCH candidates for a corresponding CCE level, wherein the second control channel resources are associated with a second search space; Obtaining downlink control information by decoding PDCCH candidates in the first search space based on a first number of PDCCH candidates for a corresponding CCE level, or by decoding PDCCH candidates in the second search space based on a second number of PDCCH candidates for a corresponding CCE level; as well as Downlink data is received from the base station on a physical downlink shared channel (PDSCH) based on the downlink control information.

10. The UE according to claim 9, wherein: The PDCCH reception on the first search space is in a first time slot subset, and the PDCCH reception on the second search space is in a second time slot subset.

11. The UE according to claim 9, wherein: The at least one processor is further configured to: send hybrid automatic repeat request acknowledgement (HARQ-ACK) information to the base station in response to the downlink data on a physical uplink control channel (PUCCH) in a time slot, The time slot is identified based on a time slot offset between the PDSCH and the HARQ-ACK feedback included in the downlink control information.

12. The UE according to claim 11, wherein: The PUCCH resource is identified based on a PUCCH resource indicator included in the downlink control information.

13. A base station in a communication system, the base station comprising: transceiver; as well as at least one processor coupled to the transceiver and configured to: sending a first configuration relating to a first control channel resource in a first bandwidth part of a cell to a user equipment (UE), the first configuration comprising information relating to a first number of symbols for the first control channel resource and information relating to a first number of physical downlink control channel (PDCCH) candidates for a corresponding control channel element (CCE) level, wherein the first control channel resource is associated with a first search space, sending, to the UE, a second configuration related to second control channel resources in a second bandwidth part of the cell, the second configuration comprising information related to a second number of symbols for the second control channel resources and information related to a second number of PDCCH candidates for a corresponding CCE level, wherein the second control channel resources are associated with a second search space; sending downlink control information in the first search space to the UE based on a first number of PDCCH candidates for a corresponding CCE level, or sending downlink control information in the second search space to the UE based on a second number of PDCCH candidates for a corresponding CCE level, and Downlink data corresponding to the downlink control information is sent to the UE on a physical downlink shared channel (PDSCH).

14. The base station according to claim 13, wherein: The PDCCH reception on the first search space is in a first time slot subset, and the PDCCH reception on the second search space is in a second time slot subset.

15. The base station according to claim 13, wherein: The at least one processor is further configured to: receive hybrid automatic repeat request acknowledgement (HARQ-ACK) information from the UE in response to the downlink data on a physical uplink control channel (PUCCH) in a time slot, The time slot is associated with a time slot offset between the PDSCH and the HARQ-ACK feedback included in the downlink control information. The base station according to claim 15 , wherein: The PUCCH resource is associated with a PUCCH resource indicator included in the downlink control information.

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