Uplink Power Control in Dual Connectivity

Abstract

The present disclosure relates to a communication method and system for aggregating a fifth generation (5G) communication system and an Internet of Things (IoT) technology that supports a higher data rate than a fourth generation (4G) system. The present disclosure can be applied to smart services based on 5G communication technology and IoT-related technology, such as smart homes, smart buildings, smart cities, smart cars, connected cars, healthcare, digital education, smart retail, security and safety services. A method and apparatus for managing dual connections. A method for operating a UE includes: receiving a configuration for dynamic power sharing (DPS) between a transmission on a primary cell group (MCG) and a transmission on a secondary cell group (SCG), and determining a time offset as a function of a subcarrier spacing (SCS) configuration and a configuration for PUSCH processing capabilities on the MCG and the SCG. The method also includes: when each transmission on the MCG is scheduled by a downlink control information (DCI) format in a PDCCH reception, at the beginning of a PUSCH transmission on the SCG, determining a maximum power of a PUSCH transmission on the SCG, and the PDCCH reception ends at at least a time offset before the start of the PUSCH transmission on the SCG. The method also includes sending a transmission on the MCG and sending a PUSCH transmission on the SCG.

Description

Technical Field

[0001] The present disclosure relates to wireless communication systems and more particularly to a timeline required for a user equipment (UE) to determine transmission power for dual connectivity operation. Background Art

[0002] In order to meet the demand for increased wireless data services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or pre-5G communication systems. Therefore, 5G or pre-5G communication systems are also referred to as "post-4G networks" or "post-LTE systems". 5G communication systems are considered to be implemented in higher frequency (mmWave) bands, such as the 60GHz band, in order to achieve higher data rates. In order to reduce the propagation loss of radio waves and increase the transmission distance, in 5G communication systems, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive antenna technology are discussed. In addition, in 5G communication systems, development of system network improvements based on advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communications, wireless backhaul, mobile networks, collaborative communications, coordinated multi-point (CoMP), receiving-end interference elimination, etc. is underway. In 5G systems, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC) as advanced coding modulation (ACM), and filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA) and sparse code multiple access (SCMA) as advanced access technologies have been developed.

[0003] The Internet is a human-centered connectivity network where humans generate and consume information, and is now developing into the Internet of Things (IoT), where distributed entities such as things exchange and process information without human intervention. The Internet of Everything (IoE), which is a combination of IoT technology and big data processing technology through connection with cloud servers, has emerged. Technology elements such as "sensing technology", "wired / wireless communication and network infrastructure", "service interface technology" and "security technology" have recently been studied for IoT implementation, sensor networks, machine-to-machine (M2M) communication, machine type communication (MTC), etc. This IoT environment can provide smart Internet technology services that create new value for human life by collecting and analyzing data generated between connected things. Through the integration and combination between existing information technology (IT) and various industrial applications, IT can be applied to various fields including smart homes, smart buildings, smart cities, smart cars or connected cars, smart grids, health care, smart devices and advanced medical services.

[0004] In line with this, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as sensor networks, machine type communications (MTC), and machine-to-machine (M2M) communications can be implemented through beamforming, MIMO, and array antennas. The application of cloud radio access networks (RANs) as the above-mentioned big data processing technology can also be considered as an example of the fusion between 5G technology and IoT technology.

[0005] An improved 5G communication system is needed. The 5G communication system can be implemented in higher frequency (mmWave) bands (e.g., 30 GHz bands) to achieve higher data rates and / or in lower frequency bands (e.g., below 6 GHz) to support large coverage and enhanced mobility. A user equipment (UE) can communicate with multiple network nodes and operate with carrier aggregation when the backhaul latency between the multiple network nodes is negligible, otherwise operate with dual connectivity. When the UE operates with dual connectivity with a primary node and a secondary node, one of the main design goals is to divide the UE capabilities between the two nodes, because the scheduling of the two nodes of the transmission from the UE or the reception of the UE by the UE may not be coordinated. One of the capabilities is the maximum UE transmit power, where conservative partitioning may result in a loss of coverage and spectral efficiency, while aggressive partitioning may result in transmissions being dropped, reducing the quality of service on the secondary node, and may also reduce spectral efficiency. Summary of the invention

[0006] [Technical issues]

[0007] The UE may be configured to operate with carrier aggregation (CA) or dual connectivity (DC). For operation with CA or DC, the UE may be configured with a first cell group including a primary cell group (MCG) and a second cell group including a secondary cell group (SCG). For operation with DC, the UE may be configured with a first maximum power and a second maximum power, respectively, for transmission to the MCG and the SCG. In the case where operation is performed using MCG and SCG and the total transmission power does not exceed the maximum UE transmission power, the maximum UE transmission power for operation using the MCG and SCG may be semi-statically divided between the primary node (MN) of the MCG and the secondary node (SN) of the SCG through high-layer signaling, or under certain conditions where the transmission on the SCG can use the remaining power from the transmission on the MCG, dynamic power sharing is possible, and vice versa. The terms MCG and MN and the terms SCG and SN are used interchangeably in the present disclosure. The power control mechanism may depend on whether the transmissions on different cells have the same duration and whether the transmissions on the different cells are synchronized with respect to the time slot boundaries. In addition, for the coexistence of LTE and NR at the UE, LTE provides MCG and NR provides SCG.

[0008] A fixed division of the maximum UE transmit power between the MCG and the SCG is suboptimal as it reduces the maximum UE transmit power of each CG below the maximum UE transmit power. Such a division results in reduced coverage because, for example, the UE has less available power to transmit on the MCG, and in reduced spectral efficiency. A dynamic power sharing (DPS) mechanism that enables the UE to use the available power for transmissions on the MCG or the SCG based on the actual transmissions at a given time circumvents the disadvantages of a fixed division of the maximum UE transmit power between the MCG and the SCG, but introduces a new challenge to the UE in determining the available power at a given time since this requires the UE to know the actual transmissions at a given time and their content. The power allocation for transmissions on the MCGs can be prioritized, and then after allocating power for transmissions on the MCGs, the problem reduces to determining the available power that the UE can use for transmissions on the SCG at a given time.

[0009] [Solution to the problem]

[0010] In one embodiment, a method performed by a user equipment (UE), the method comprising: receiving subcarrier spacing SCS configuration information and information for physical uplink shared channel PUSCH processing capability on a master cell group (MCG) and a secondary cell group (SCG) for dynamic power sharing (DPS); determining a time offset T based on the SCS configuration information and the information for PUSCH processing capability. offset ; determining the maximum power of PUSCH transmission on SCG when the power of transmission on MCG is scheduled by downlink control information DCI format; and sending transmission on MCG and sending PUSCH transmission on SCG, wherein the power of PUSCH transmission on SCG is not greater than the maximum power.

[0011] In another embodiment, a user equipment (UE) includes: a processor configured to: determine a time offset T based on subcarrier spacing SCS configuration information on a primary cell group MCG and a secondary cell group SCG and information for a physical uplink shared channel PUSCH processing capability in a case where the power of transmission on the MCG is scheduled by a downlink control information DCI format. offset ; and determining a maximum power of a PUSCH transmission on the SCG; and a transceiver, operably connected to the processor, the transceiver being configured to: receive SCS configuration information and information for PUSCH processing capabilities, and send a transmission on the MCG and send the PUSCH transmission on the SCG, wherein the power of the PUSCH transmission on the SCG is not greater than the maximum power.

[0012] In another embodiment, a network node includes: a processor, configured to determine a time offset as a maximum value of a first time offset and a second time offset, wherein the first time offset is applicable to the network node and the second time offset is applicable to a second network node; and a transceiver, operably connected to the processor, the transceiver configured to: send a configuration of dynamic power sharing (DPS) between transmissions to the network node and transmissions to the second network node; send a first physical downlink control channel (PDCCH) providing a first downlink control information (DCI) format, wherein the first DCI format schedules transmission of a first physical uplink shared channel (PUSCH), and transmission of the first PUSCH transmission starts at at least the time offset after transmission of the first PDCCH ends; and receive a first PUSCH.

[0013] [Beneficial Effects of the Invention]

[0014] The present disclosure provides enhancements to dynamic power sharing for a UE to determine transmit power for operating with dual connectivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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:

[0016] Figure 1 An example wireless network according to an embodiment of the present disclosure is shown;

[0017] Figure 2 An example gNB according to an embodiment of the present disclosure is shown;

[0018] Figure 3 An example UE according to an embodiment of the present disclosure is shown;

[0019] Figure 4a A high-level schematic diagram of an orthogonal frequency division multiple access transmission path according to an embodiment of the present disclosure is shown;

[0020] Figure 4b A high-level schematic diagram of an orthogonal frequency division multiple access receive path according to an embodiment of the present disclosure is shown;

[0021] Figure 5 An example transmitter structure using OFDM according to an embodiment of the present disclosure is shown;

[0022] Figure 6 An example receiver structure using OFDM according to an embodiment of the present disclosure is shown;

[0023] Figure 7 A method for a UE to determine transmission power on an SCG by considering scheduled transmissions on an MCG according to an embodiment of the present disclosure is shown;

[0024] Figure 8 A method for a MN to determine a maximum processing time for a transmission from a UE on a SN according to an embodiment of the present disclosure is shown; and

[0025] Fig. 9 A method for a UE to determine a minimum time offset between the end of PDCCH reception and the start of a scheduled transmission according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0026] Discussed below Figures 1 to 9 The various embodiments used to describe the principles of the present disclosure are merely exemplary and should not be construed in any way to limit the scope of the present disclosure. Those skilled in the art will appreciate that the principles of the present invention may be implemented in any suitably arranged wireless communication system.

[0027] Depending on the network type, the term "network node" or "base station" may refer to any component or set of components configured to provide wireless access to a network, such as a transmission point (TP), a TRP, a gNB, a macro cell, a femto cell, a WiFi access point (AP), or other wirelessly enabled devices. A base station may provide wireless access according to one or more wireless communication protocols, such as 5G3GPP 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. The terms "gNB" and "network node" are used interchangeably in this disclosure to refer to network infrastructure components that provide wireless access to remote terminals. In addition, depending on the network type, the term UE may refer to any component, such as a mobile station, a user station, a remote terminal, a wireless terminal, a receiving point, or a user device. A UE may be a mobile device or a fixed device.

[0028] In order to meet the demand for increased wireless data services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or pre-5G communication systems. Therefore, 5G or pre-5G communication systems are also referred to as "post-4G networks" or "post-LTE systems."

[0029] 5G communication systems can be implemented in higher frequency (mmWave) bands, such as 28 GHz or 60 GHz bands, or bands above 6 GHz in general, to achieve higher data rates, or in lower frequency bands such as below 6 GHz to achieve robust coverage and mobility support. In order to reduce the propagation loss of radio waves and increase the transmission distance, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive antenna technology are considered in 5G communication systems. In addition, in 5G communication systems, system network improvements are being developed based on advanced small cells, cloud radio access networks (RANs), ultra-dense networks, device-to-device (D2D) communications on side links, wireless backhaul, mobile networks, collaborative communications, such as coordinated multi-point (CoMP) transmission / reception from multiple TRPs, receiving-end interference elimination, etc.

[0030] The discussion of 5G systems and frequency bands associated therewith is for reference, as certain embodiments of the present disclosure may be implemented in 5G systems. However, the present invention is not limited to 5G systems or frequency bands associated therewith, and embodiments of the present invention may be used in conjunction with any frequency band.

[0031] The present disclosure relates to monitoring a downlink control channel to communicate with multiple TRPs.

[0032] In one embodiment, a method for a user equipment (UE) is provided. The method includes receiving a configuration of dynamic power sharing (DPS) between transmissions on a primary cell group (MCG) and transmissions on a secondary cell group (SCG), and setting a time offset T offset The method further comprises: determining the maximum power of a PUSCH transmission on the SCG at the beginning of the PUSCH transmission on the SCG when each transmission on the MCG is scheduled in a downlink control information (DCI) format in a physical downlink control channel (PDCCH) reception, the PDCCH being received at least T before the start of the PUSCH transmission on the SCG. offset The method further includes transmitting on the MCG and transmitting on the SCG a PUSCH, wherein the power of the PUSCH transmission on the SCG is not greater than the maximum power.

[0033] In another embodiment, a UE is provided. The UE includes a processor configured to: when at least T before the start of PUSCH transmission on the SCG offset When the DCI format in the PDCCH reception that ends at the end schedules each transmission on the MCG, (i) the time offset Toffset The processor is configured to determine a function of the SCS configuration and the configuration of the PUSCH processing capabilities on the MCG and the SCG, and (ii) determine a maximum power for the PUSCH transmission on the SCG at the beginning of the PUSCH transmission on the SCG. The UE also includes a transceiver operably connected to the processor. The transceiver is configured to receive a configuration for a DPS between a transmission on the MCG and a transmission on the SCG, and transmit the transmission on the MCG and the PUSCH transmission on the SCG. The power used for the PUSCH transmission on the SCG is not greater than the maximum power.

[0034] In yet another embodiment, a network node is provided. The network node includes a processor configured to determine a time offset as a maximum value of a first time offset and a second time offset. The first time offset is applicable to the network node. The second time offset is applicable to a second network node. The network node also includes a transceiver operably connected to the processor. The transceiver is configured to send a configuration for a DPS between a transmission to the network node and a transmission to the second network node, and to send a first PDCCH providing a first DCI format. The first DCI format schedules the transmission of a first PUSCH, and the transmission of the first PUSCH transmission begins at least the time offset after the first PDCCH transmission ends. The transceiver is further configured to receive the first PUSCH.

[0035] Other technical features will be apparent to those skilled in the art from the following drawings, description and claims.

[0036] It may be advantageous to clarify the definitions of certain words and phrases used in this disclosure. The term "connection" and its derivatives refer to any direct or indirect communication between two or more elements, whether or not these elements are in physical contact with each other. The terms "send", "receive" and "communication" and their derivatives include direct and indirect communication. The terms "include" and "comprise" and their derivatives are intended to include without limitation. The term "or" is inclusive, meaning and / or. The phrase "associated with..." and its derivatives mean to include, be included in, interconnected with, include, be included in, be connected to or connected with, be connected to or connected with, communicate with, collaborate with, interweave, parallel, approach, be bound to or bound with, have, have the characteristics of, have a relationship with, etc. The term "controller" refers to any device, system or part thereof that controls at least one operation. Such a controller can be implemented with hardware or a combination of hardware and software and / or firmware. The functions associated with any particular controller can 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 only one of the items in 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 and B and C.

[0037] 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 is contained in a computer-readable medium. The terms "application" and "program" refer to one or more computer programs, software components, instruction sets, processes, functions, objects, classes, instances, related data, or parts thereof suitable for implementation in appropriate computer-readable program codes. 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-transitory" computer-readable medium excludes wired, wireless, optical, or other communication links that transmit temporary electrical or other signals. A non-transitory computer-readable medium includes a medium that can permanently store data, and a medium that can store data and then rewrite data, such as a rewritable optical disc or an erasable storage device.

[0038] Definitions for certain other words and phrases are provided throughout this disclosure. 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.

[0039] Figure 1 An example wireless network 100 is shown in accordance with various embodiments of the present disclosure. Figure 1 The embodiment of the wireless network 100 shown is for illustration only. Other embodiments of the wireless network 100 may be used without departing from the scope of the present disclosure.

[0040] Wireless network 100 includes BS 101, BS 102, and BS 103. BS 101 communicates with BS 102 and BS 103. BS 101 also communicates with at least one Internet Protocol (IP) network 130, such as the Internet, a private IP network, or other data network.

[0041] The gNB 102 provides wireless broadband access to a network 130 for a plurality of first UEs within a coverage area 120 of the gNB 102. The plurality of first UEs include: a UE 111, which may be located in a small business; a UE 112, which may be located in an enterprise (E); a UE 113, which may be located in a WiFi hotspot HS; a UE 114, which may be located in a first residence (R); a UE 115, which may be located in a second residence (R); and a UE 116, which may be a mobile device (M) such as a cellular phone, a wireless laptop, a wireless PDA, etc. The gNB 103 provides wireless broadband access to the network 130 for a plurality of second UEs within a coverage area 125 of the gNB 103. The plurality of second UEs include UE 115 and UE 116. In some embodiments, one or more of the gNBs 101-103 may communicate with each other and with the UEs 111-116 using 5G, LTE, LTE-A, WiMAX, or other advanced wireless communication technologies.

[0042] The dashed lines illustrate the approximate extents of coverage areas 120 and 125, which are shown as approximately circular for purposes of illustration and explanation only. For example, coverage areas associated with gNBs, 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.

[0043] 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. 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 UEs with direct wireless broadband access to network 130. In addition, gNBs 101, 102, and / or 103 may provide access to other or additional external networks (e.g., other types of data networks).

[0044] Figure 2 An example gNB 102 is shown according to an embodiment of the present disclosure. Figure 2 The embodiment of gNB 102 shown is for illustration only, and Figure 1 gNBs 101 and 103 may have the same or similar configurations. However, gNBs have various configurations, and Figure 2 The scope of this disclosure is not limited to any particular implementation of gNB.

[0045] like Figure 2 As shown, gNB 102 includes multiple antennas 205a-205n, multiple RF transceivers 210a-210n, transmit (TX) processing circuitry 215, and receive (RX) processing circuitry 220. gNB 102 also includes a controller / processor 225, a memory 230, and a backhaul or network interface 235.

[0046] RF transceivers 210a-210n receive incoming RF signals from antennas 205a-205n, such as signals sent by UEs in network 100. RF transceivers 210a-210n downconvert the incoming RF signals to produce 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.

[0047] The TX processing circuit 215 receives analog or digital data (e.g., voice data, web 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 produce a processed baseband or IF signal. The RF transceivers 210a-210n receive the processed baseband or IF signal from the output of the TX processing circuit 215 and up-convert the baseband or IF signal to an RF signal that is transmitted via the antennas 205a-205n.

[0048] 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-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 transmits a downlink control channel for communicating with multiple TRPs. The controller / processor 225 may support any of a variety of other functionality in the gNB 102.

[0049] 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 may move data into or out of the memory 230 as required by the executing process.

[0050] The controller / processor 225 is also connected 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 can support communication over any appropriate wired or wireless connection. For example, when the gNB 102 is implemented as part of a cellular communication system (e.g., a system supporting 5G, LTE, or LTE-A), the interface 235 can 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 can allow the gNB 102 to communicate with a larger network (e.g., the Internet) via a wired or wireless local area network or via a wired or wireless connection. The interface 235 includes any suitable structure that supports communication over a wired or wireless connection, such as an Ethernet or RF transceiver.

[0051] Memory 230 is connected to controller / processor 225. A portion of memory 230 may include RAM, while another portion of memory 230 may include flash memory or other ROM.

[0052] although Figure 2 An example of a gNB 102 is shown, but the Figure 2 For example, gNB 102 may include 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 may include multiple instances of each (e.g., one instance per RF transceiver). In addition, Figure 2 The various components in may be combined, further subdivided, or omitted, and additional components may be added according to specific needs.

[0053] Figure 3 An example UE 116 is shown in accordance with an embodiment of the present disclosure. Figure 3 The embodiment of UE 116 shown is for illustration only. Figure 1 UEs 111-115 may have the same or similar configurations. However, UEs may have a variety of configurations, and Figure 3 The scope of the present disclosure is not limited to any particular implementation of a UE.

[0054] like Figure 3 As shown, UE 116 includes antenna 305, radio frequency (RF) transceiver 310, TX processing circuit 315, microphone 320 and receive (RX) processing circuit 325. UE 116 also includes speaker 330, processor 340, input / output (I / O) interface (IF) 345, touch screen 350, display 355 and memory 360. Memory 360 includes operating system (OS) 361 and one or more applications 362.

[0055] 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 produce 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 transmits the processed baseband signal to speaker 330 (e.g., for voice data) or processor 340 for further processing (e.g., for web browsing data).

[0056] The TX processing circuit 315 receives analog or digital voice data from the microphone 320 or other outgoing baseband data (e.g., web data, email, or interactive video game data) from the processor 340. The TX processing circuit 315 encodes, multiplexes, and / or digitizes the outgoing baseband data to produce a processed baseband or IF signal. The RF transceiver 310 receives the outgoing processed baseband or IF signal from the TX processing circuit 315 and up-converts the baseband or IF signal to an RF signal that is transmitted via the antenna 305.

[0057] The processor 340 may include one or more processors or other processing devices and execute the 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.

[0058] The processor 340 is also capable of executing other processes and programs resident in the memory 360, such as processes for sending to or receiving from the primary and secondary nodes. The processor 340 can move data into or out of the memory 360 as required by the execution process. In some embodiments, the processor 340 is configured to execute the application 362 based on the OS 361 or in response to a signal received from the gNB or operator. The processor 340 is also connected to the I / O interface 345, which provides the UE 116 with the ability to connect to other devices such as laptops and handheld computers. The I / O interface 345 is the communication path between these accessories and the processor 340.

[0059] Processor 340 is also connected to touch screen 350 and display 355. An operator of UE 116 may input data into UE 116 using touch screen 350. Display 355 may be a liquid crystal display, light emitting diode display, or other display capable of presenting text and / or at least limited graphics, such as from a website.

[0060] The memory 360 is connected to the processor 340. A portion of the memory 360 may include a random access memory (RAM), and another portion of the memory 360 may include a flash memory or other read-only memory (ROM).

[0061] although Figure 3 An example of UE 116 is shown, but the Figure 3 Make various changes. For example, Figure 3 The various components in may be combined, further subdivided, or omitted, and additional components may be added as required. As a specific example, processor 340 may 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 smart phone, but the UE may be configured to operate as other types of mobile or stationary devices.

[0062] Figure 4ais a high-level block diagram of transmit path circuit 400. For example, transmit path circuit 400 may be used for orthogonal frequency division multiple access (OFDMA) communications. Figure 4b 4 is a high-level block diagram of receive path circuitry 450. For example, receive path circuitry 450 may be used for orthogonal frequency division multiple access (OFDMA) communications. Figure 4a and 4b For downlink communications, the transmit path circuit 400 may be implemented in a base station (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 The transmit path circuit 400 may be implemented in a user equipment (e.g., a gNB 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 device 116).

[0063] The transmit path circuit 400 includes a channel coding and modulation block 405, a serial to parallel (S to P) block 410, an inverse fast Fourier transform (IFFT) block of size N 415, a parallel to serial (P to S) block 420, an add cyclic prefix block 425, and an upconverter (UC) 430. The receive path circuit 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) block of size N 470, a parallel to serial (P to S) block 475, and a channel decoding and demodulation block 480.

[0064] Figure 4a and 4b At least some components in can be implemented in software, while other components can be implemented by 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 the present disclosure can be implemented as a configurable software algorithm, in which the value of size N can be modified according to the implementation.

[0065] In addition, although the present disclosure relates to embodiments that implement fast Fourier transform and inverse fast Fourier transform, this is merely exemplary and should not be construed as limiting the scope of the present disclosure. It is 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 is understood that for DFT and IDFT functions, the value of the N variable can be any integer (i.e., 1, 4, 3, 4, etc.), and for FFT and IFFT functions, the value of the N variable can be any integer as a power of 2 (i.e., 1, 2, 4, 8, 16, etc.).

[0066] In the transmit path circuit 400, the channel coding and modulation block 405 receives a set of information bits, applies coding (e.g., LDPC coding) and modulates (e.g., quadrature phase shift keying (QPSK) or quadrature amplitude modulation (QAM)) the input bits to produce a frequency domain modulation symbol sequence. 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. Then, the add cyclic prefix block 425 inserts a cyclic prefix into the time domain signal. Finally, the up-converter 430 modulates (i.e., up-converts) the output of the add cyclic prefix block 425 to an RF frequency for transmission via a wireless channel. The signal may also be filtered at baseband before conversion to RF frequency.

[0067] The transmitted RF signal arrives at UE 116 after passing through the wireless channel, and the reverse operation of that at gNB 102 is performed. Downconverter 455 downconverts the received signal to baseband frequency, and remove cyclic prefix 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 to parallel time-domain signals. FFT block 470 of size N then performs an FFT algorithm to produce N parallel frequency-domain signals. Parallel to serial block 475 converts the parallel frequency-domain signals to a sequence of modulated data symbols. Channel decoding and demodulation block 480 demodulates and decodes the modulated symbols to recover the original input data stream.

[0068] Each of gNBs 101-103 may implement a transmit path similar to that for transmitting in the downlink to user equipment 111-116 and may implement a receive path similar to that for receiving in the uplink from user equipment 111-116. Similarly, each of user equipment 111-116 may implement a transmit path corresponding to the architecture for transmitting in the uplink to gNB 101-103 and may implement a receive path corresponding to the architecture for receiving in the downlink from gNB 101-103.

[0069] The time unit for DL ​​signaling or UL signaling on a cell is one symbol. A symbol belongs to a time slot that includes multiple symbols, for example 14 symbols, and is called a DL symbol if used for DL ​​signaling, a UL symbol if used for UL signaling, or a flexible symbol if it can be used for DL ​​signaling or UL signaling. A time slot can also be a time unit for DL ​​or UL signaling on a cell.

[0070] The bandwidth (BW) unit is called a resource block (RB). One RB includes multiple subcarriers (SC), for example, 12 subcarriers. The RB in one symbol of a time slot is called a physical RB (PRB) and includes multiple resource elements (REs). For example, a time slot may have a duration of 1 millisecond, and the RB may have a BW of 180kHz and include 12SCs with an SC spacing of 15kHz. As another example, a time slot may have a duration of 0.25 milliseconds, and the RB may have a BW of 720kHz and include 12SCs with an SC spacing of 60kHz.

[0071] DL signals include data signals that transmit information content, control signals that transmit DL control information (DCI), and reference signals (RS) also known as pilot signals. The gNB transmits data information or DCI through the corresponding physical DL shared channel (PDSCH) or physical DL control channel (PDCCH). PDSCH or PDCCH transmission can be performed on a variable number of time slot symbols including one time slot symbol. The gNB sends one or more of multiple types of RS including channel state information RS (CSI-RS) and demodulation RS (DM-RS). CSI-RS is mainly used for UE to perform measurements and provide channel state information (CSI) to the gNB. 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 zero power CSI-RS (ZP CSI-RS) configuration are used. The CSI process consists of NZP CSI-RS and CSI-IM resources. The UE can determine the CSI-RS transmission parameters through DL control signaling or higher layer signaling (such as radio resource control (RRC) signaling from the gNB). The transmission instance of CSI-RS can be indicated by DL control signaling or configured by higher layer signaling. DM-RS is usually transmitted only in the BW of the corresponding PDCCH or PDSCH, and the UE can use DM-RS to demodulate data or control information.

[0072] The UL signal also includes a data signal that transmits information content, a control signal that transmits UL control information (UCI), a DM-RS associated with data or UCI demodulation, a sounding RS (SRS) that enables the gNB to perform UL channel measurement, and a random access (RA) preamble that enables the UE to perform random access. The UE transmits data information or UCI through the respective physical UL shared channel (PUSCH) or physical UL control channel (PUCCH). The PUSCH or PUCCH can be transmitted on a variable number of time slot symbols including one time slot symbol. When the UE transmits data information and UCI at the same time, the UE can multiplex them in the PUSCH.

[0073] The 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. The HARQ-ACK information can be configured with a smaller granularity than each TB and can be per data code block (CB) or per data CB group, where a data TB includes multiple data CBs. The CSI report from the UE can include a Channel Quality Indicator (CQI) that informs the gNB of the maximum modulation and coding scheme (MCS) for the UE to detect the data TB at a predetermined block error rate (BLER) of the precoding matrix indicator (PMI), such as 10% BLER, and a rank indicator (RI) that indicates the transmission rank of the PDSCH. UL RS includes DMRS and SRS. DMRS is transmitted only in the BW of the corresponding PUSCH or PUCCH transmission. The gNB can use DMRS to demodulate the information in the corresponding PUSCH or PUCCH. SRS is sent by the UE to provide UL CSI to the gNB, and for TDD systems, SRS transmission can also provide PMI for DL ​​transmission. In addition, in order to establish synchronization or initial higher layer connection with the gNB, the UE can send a physical random access channel (PRACH).

[0074] Figure 5 An example transmitter structure 500 using OFDM according to an embodiment of the present disclosure is shown. Figure 5 The illustrated embodiment of transmitter architecture 500 is for illustration only. Figure 5 One or more of the components shown may be implemented in dedicated circuits configured to perform the functions described, or one or more components may be implemented by one or more processors executing instructions to perform the functions described.Other embodiments may be used without departing from the scope of the present disclosure.

[0075] The information bits such as DCI bits or data bits 510 are encoded by an encoder 520, rate matched to the allocated time / frequency resources by a rate matcher 530, and modulated by a modulator 540. Subsequently, the modulated coded symbols and DMRS or CSI-RS 550 are mapped to SCS 560 by an SC mapping unit 575, an inverse fast Fourier transform (IFFT) is performed by a filter 570, a cyclic prefix (CP) is added by a CP insertion unit 580, and the resulting signal is filtered by a filter 590 and transmitted by a radio frequency (RF) unit 595.

[0076] Figure 6 An example receiver structure 600 using OFDM is shown according to an embodiment of the present disclosure. Figure 6 The embodiment of receiver structure 600 shown in FIG. 6 is for illustration only. Figure 6 One or more of the components shown may be implemented in dedicated circuits configured to perform the functions described, or one or more components may be implemented by one or more processors executing instructions to perform the functions described.Other embodiments may be used without departing from the scope of the present disclosure.

[0077] The received signal 610 is filtered by a filter 620, a CP removal unit removes the CP 630, a filter 640 applies a fast Fourier transform (FFT), an SC demapping unit 650 demaps the SC selected by a BW selector unit 675, the received symbols are demodulated by a channel estimator and demodulator unit 660, a rate dematcher 670 restores rate matching, and a decoder 680 decodes the resulting bits to provide information bits 690.

[0078] The UE may be configured to operate with carrier aggregation (CA) or dual connectivity (DC). For operation with CA or DC, the UE may be configured with a first cell group including a primary cell group (MCG) and a second cell group including a secondary cell group (SCG). For operation with DC, the UE may be configured with a first maximum power and a second maximum power, respectively, for transmission to the MCG and the SCG. In the case where operation is performed using MCG and SCG and the total transmission power does not exceed the maximum UE transmission power, the maximum UE transmission power for operation using the MCG and SCG may be semi-statically divided between the primary node (MN) of the MCG and the secondary node (SN) of the SCG through high-layer signaling, or under certain conditions where the transmission on the SCG can use the remaining power from the transmission on the MCG, dynamic power sharing is possible, and vice versa. The terms MCG and MN and the terms SCG and SN are used interchangeably in the present disclosure. The power control mechanism may depend on whether the transmissions on different cells have the same duration and whether the transmissions on the different cells are synchronized with respect to the time slot boundaries. In addition, for the coexistence of LTE and NR at the UE, where LTE provides MCG and NR provides SCG.

[0079] A fixed division of the maximum UE transmit power between the MCG and the SCG is suboptimal as it reduces the maximum UE transmit power of each CG below the maximum UE transmit power. Such a division results in reduced coverage because, for example, the UE has less available power to transmit on the MCG, and in reduced spectral efficiency. A dynamic power sharing (DPS) mechanism that enables the UE to use the available power for transmissions on the MCG or the SCG based on the actual transmissions at a given time circumvents the disadvantages of a fixed division of the maximum UE transmit power between the MCG and the SCG, but introduces a new challenge to the UE in determining the available power at a given time since this requires the UE to know the actual transmissions at a given time and their content. The power allocation for transmissions on the MCGs can be prioritized, and then after allocating power for transmissions on the MCGs, the problem reduces to determining the available power that the UE can use for transmissions on the SCG at a given time.

[0080] In order to determine the transmit power at a given time, it is necessary to determine the channel / signal being transmitted and its content. In addition, if the UE has time-overlapping transmissions on a cell (or a portion of the bandwidth of a cell) at a given time, the UE may need to resolve this overlap by multiplexing the information content in one channel and sending only that channel. For example, if the UE will send PUCCH and PUSCH that will overlap in time on a cell, the UE may multiplex the UCI of the PUCCH in the PUSCH and send only the PUSCH. For example, if the UE will send a first PUCCH and a second PUCCH that overlap in time on a cell, the UE may multiplex all UCI in one PUCCH and send the one PUCCH. In the case of transmissions scheduled by a DCI format, this resolution of time-overlapping transmissions on the same cell requires a specific processing time determined by the processing time of the corresponding PDCCH reception, as well as the preparation time for the transmission after resolving the overlap of the transmissions.

[0081] If the UE is to transmit multiple overlapping PUCCHs or overlapping PUCCHs and PUSCHs in a timeslot, and the UE is configured to multiplex different UCI types in one PUCCH, and at least one of the multiple overlapping PUCCHs or PUSCHs is responsive to the UE's DCI format detection, then the UE multiplexes all corresponding UCI types if the following conditions are met: If one of the PUCCH transmissions or PUSCH transmissions is responsive to the UE's DCI format detection, then the UE expects the first symbol S of the earliest PUCCH or PUSCH in the group of overlapping PUCCHs and PUSCHs in the timeslot 0 The following timeline conditions are met:

[0082] -S 0 Not after the last symbol of any corresponding PDSCH Before the symbol with cyclic prefix (CP) starting at Depend on The maximum value of is given by, where for the i-th PDSCH with corresponding HARQ-ACK transmission on PUCCH in a group of overlapping PUCCH and PUSCH, d 1，1 is selected for the subsequent i-th PDSCH, N 1 is selected based on the UE PDSCH processing capability of the ith PDSCH and SCS configuration μ, where μ corresponds to the SCS configuration in the minimum subcarrier spacing (SCS) configuration of the PDCCH used to schedule the ith PDSCH (if any), the ith PDSCH, the PUCCH with the corresponding HARQ-ACK transmission for the ith PDSCH, and the PDCCH for all PUSCHs in the group of overlapping PUCCHs and PUSCHs.

[0083] -S 0 Not after the last symbol of any corresponding semi-persistent scheduling (SPS) PDSCH release Before the symbol with CP starting at . Is The maximum value of is given by, where for the i-th PDCCH providing SPS PDSCH release with corresponding HARQ-ACK transmission on PUCCH in the group of overlapping PUCCH and PUSCH, N is selected based on the UE PDSCH processing capability and the SCS configuration μ for the i-th SPS PDSCH release, where μ corresponds to the SCS configuration in the minimum subcarrier spacing (SCS) configuration for the PDCCH providing the i-th SPS PDSCH release, the PUCCH with the corresponding HARQ-ACK transmission for the i-th SPS PDSCH release, and all PUSCHs in the group of overlapping PUCCHs and PUSCHs.

[0084] - If there is no aperiodic CSI report multiplexed in the PUSCH in the group of overlapping PUCCH and PUSCH, then S 0 Not after the last symbol in the following situations Before the symbol with CP starting at:

[0085] - Any PDCCH with a DCI format scheduling overlapping PUSCH

[0086] - Any PDCCH that schedules PDSCH or SPS PDSCH release with corresponding HARQ-ACK information in the overlapping PUCCH in the slot

[0087] If there is at least one PUSCH in the group of overlapping PUCCH and PUSCH, then Depend on The maximum value of is given by, where for the i-th PUSCH in a group of overlapping PUCCH and PUSCH, d 2，1 and d 2，2 is selected for the i-th PUSCH, N 2 It is selected based on the UE PUSCH processing capability and the SCS configuration μ for the i-th PUSCH, where μ corresponds to the PDSCH used to schedule the i-th PUSCH (if any), the PDCCH scheduling the PDSCH for the corresponding HARQ-ACK transmission on the PUCCH in the group with overlapping PUCCH / PUSCH, and the SCS configuration in the minimum subcarrier spacing (SCS) configuration of all PUSCHs in the group of overlapping PUCCH and PUSCH.

[0088] If there is no PUSCH in the group of overlapping PUCCH and PUSCH, then Depend on The maximum value of is given by, where for the i-th PUSCH in the group of overlapping PUCCH and PUSCH d 2，1 and d 2，2 is selected for the i-th PUSCH, N 2 It is selected based on the UE PUSCH processing capability and the SCS configuration μ for the i-th PUSCH, where μ corresponds to the PDSCH used to schedule the i-th PUSCH (if any), the PDCCH scheduling the PDSCH for the corresponding HARQ-ACK transmission on the PUCCH in the group with overlapping PUCCH / PUSCH, and the SCS configuration in the minimum subcarrier spacing (SCS) configuration of all PUSCHs in the group of overlapping PUCCH and PUSCH.

[0089] - If there is an aperiodic CSI report multiplexed in the PUSCH in the group of overlapping PUCCH and PUSCH, then S 0 Not after the last symbol in the following situations Before the symbol with CP starting at:

[0090] - Any PDCCH with a DCI format scheduling overlapping PUSCH

[0091] - Any PDCCH that schedules PDSCH or SPS PDSCH release with corresponding HARQ-ACK information in the overlapping PUCCH in the slot

[0092] Wherein μ corresponds to the minimum SCS configuration in the SCS configuration of PDCCH, the minimum SCS configuration of the group of overlapping PUSCHs, and the minimum SCS configuration of the CSI-RS associated with the DCI format scheduling PUSCH with multiplexed non-periodic CSI reports, and when μ=0, 1, d=2, when μ=2, d=3, and when μ=3, d=4.

[0093] - Defined in TS 38.214v16.0.0 1 、N 2 ,d 1，1 ,d 2，1 ,d 2，2 and Z, and κ and T are defined in TS 38.211 V16.0.0 C .

[0094] Table 1: PUSCH timing / PUSCH preparation time for processing capability 1

[0095] μ PUSCH preparation time N2 [symbol] 0 10 1 12 2 23 3 36

[0096] Table 2: PUSCH timing / PUSCH preparation time for processing capability 2

[0097] μ PUSCH preparation time N2 [symbol] 0 5 1 5.5 2 11 for frequency range 1

[0098] If UE

[0099] - configured for DPS between the MCG and SCG, e.g., by setting the value of the higher layer parameter NR-DC-PC-mode to dynamic, and

[0100] - Indicates the ability to determine the total transmit power on the SCG at the first symbol of a transmission opportunity on the SCG by determining the transmission on the MCG

[0101] - Scheduled by the DCI format in PDCCH reception, the last symbol in PDCCH reception is earlier than the first symbol of the transmission opportunity on SCG by more than T offset Time

[0102] - Overlap with transmission timing on SCG

[0103] At the beginning of the transmission opportunity on the SCG, the UE determines the maximum transmission power on the SCG as

[0104] - If the UE determines that the transmission on the MCG has a total power (in the linear domain), then

[0105] - If the UE does not confirm any transmission on the MCG, then

[0106] in is the linear value of the maximum transmit power on the SCG, and is the linear value of the configured maximum transmit power for NR-DC operation in the same frequency range.

[0107] The UE does not expect to have such transmissions on the MCG:

[0108] - Scheduled by the DCI format in PDCCH reception, the last symbol in PDCCH reception is less than or equal to T before the first symbol of the transmission opportunity on SCG offset Time

[0109] - Overlap with transmission timing on SCG

[0110] To maximize the gain from DPS when the UE indicates the capability to determine the transmit power on the SCG as described above, T offsetThe value of is important because too small a value does not meet the UE processing requirements, while too large a value reduces the gain from DPS operation in dual connectivity. The UE processing requirements depend on the UE PUSCH processing capabilities and the SCS configuration. Since the UE prioritizes power allocation on the MCGs and determines the available power on the SCGs after allocating power on the MCGs, at a given time the UE needs to know the transmissions on the MCGs and their content in order to determine the corresponding total transmit power on the MCGs, and this needs to be done before the time the UE needs to transmit on the SCGs. Therefore, T offset The need depends on the UE PUSCH processing capability for PUSCH preparation on MCG and SCG and the corresponding SCS configuration.

[0111] In the first embodiment, once the UE knows the information content and the channel / signal to be transmitted at a given time, it can determine the transmit power based on the symbol. offset The information content and the time required for the channel / signal can be determined based on the given time that the UE will be on the MCG / SCG in the future. offset The larger the value, the easier it is for UE to implement, but the smaller the gain from DPS. offset It should not be unnecessarily longer than the time required for the UE to determine the transmit power after preparing to transmit content.

[0112] Similar to determining the UE processing time required to resolve overlap, T offset Can have multiple values. Single T offset A value of 1 can provide simplicity without substantially reducing the performance gain from DPS in dual connectivity. For example, the maximum processing time for resolving overlaps (across all cells in both MCG and SCG) can be used For example, based on the DPS capability indicated by the UE to the network, it can be assumed that the UE's processing time is the maximum value across all cells of the MCG and SCG. Rather than the maximum value As in the case of PUCCH and PUSCH overlap. Use Rather than can result in significantly smaller T offset value, and accordingly, the operational gain from DPS can be significantly increased.

[0113] MCG Community And SCG community Depends on the UE PUSCH processing capability used on the cell of the MCG and the cell of the SCG, such as UE PUSCH capability 1 or UE PUSCH capability 2 defined in TS 38.214v16.0.0, and also depends on the SCS configuration on the cell of the MCG and the cell of the SCG. For example, for a UE operating with PUSCH processing capability 1 and μ=2 on the MCG cell and with PUSCH processing capability 1 and μ=0 on the SCG cell, Tables 6.4-1 and 6.4-2 from TS38.214v16.0.0 can be used to determine On MCG, when μ = 2, symbols, or equivalently, when μ = 0, symbols, and on SCG, symbols (for simplicity, for all cells on the MCG and all cells on the SCG, the same corresponding UE PUSCH processing capabilities and SCS are assumed; otherwise, the maximum value of all cells of the MCG is and the maximum value of all cells of SCG is applicable). Therefore, approximately 4 additional symbols will be required on the SCG in this case. For example, for a UE operating with PUSCH capability 2 and μ=2 on the MCG and a UE operating with PUSCH capability 1 and μ=0 on the SCG, it can be determined that on the MCG, when μ=2, symbols, or equivalently, 3 symbols when μ = 0, and on SCG, symbols. Therefore, approximately 7 additional symbols will be required on the SCG in this case. For example, if the previous settings of the MCG and SCG are reversed, then 0 additional symbols will be required

[0114] Usually, T offset It can be expressed as where δ depends on the PUSCH processing capability and SCS used on the MCG and SCG.

[0115] In the first approach, a “worst case” scenario is considered, where a single T offset The value is defined as corresponding to the UE processing time and the allowed configuration of SCS (across all cells of MCG) and SCG (across all cells of SCG) on MCG. offset The maximum possible value of T offset is the maximum value of all cells corresponding to MCG and SCG That one, because it is T proc，2 , and This is simple but inefficient and is detrimental to the DPS operation of the DC because (and T proc，CSI ) is usually much larger than T proc，2 , and And thus will lead to T offset A value of is too large to be beneficial for practical DPS because it requires significant delay in MCG scheduling.

[0116] In the second method, T offset It can be determined according to the MCG / SCG UE configuration according to the corresponding UE PUSCH processing capability (PUSCH timing capability) and SCS configuration. Based on DPS UE capability, and T proc，CSI From T offset is excluded from the determination of to avoid large values ​​(instead, the values ​​of all cells of the MCG and all cells of the SCG are used In addition, since not all combinations are relevant, a subset of combinations may be selected for the UE to operate for DPS in dual connectivity. For example, such combinations may be based on the combinations provided in Table 3.

[0117] Table 3: PUSCH timing / processing capabilities and SCS combinations for MCG and SCG

[0118]

[0119] In addition, the power of the transmission configured (by higher layers) on the MCG may depend on the detection of a DCI format providing a transmit power control (TPC) command in the PDCCH reception, such as DCI format 2_2. For example, when the UE has overlapping transmissions on the MCG and SCG, the time between the end of the PDCCH reception on the MCG providing DCI format 2_2 and the start of the transmission on the SCG is less than T offset , the UE may not apply the TPC command of DCI format 2_2 for transmissions on the MCG. For example, applying a positive TPC command value may result in power scaling for transmissions on the SCG. However, It can be considered as an upper limit and includes the timeline required to determine other transmission powers. The same applies to SRS transmissions triggered by DCI format 2_3 and PRACH transmissions triggered by PDCCH orders.

[0120] Figure 7 A method 700 for a UE to determine transmission power on an SCG by considering scheduled transmissions on an MCG according to the present disclosure is shown. For example, the method 700 may be performed by a UE 116. Figure 7 The embodiment of method 700 in FIG. 7 is for illustration only; other embodiments may be implemented according to the principles of the present disclosure.

[0121] The UE indicates a first or second capability for dynamic power sharing for operation with dual connectivity (step 710). The UE determines whether the UE indicates a first DPS capability or a second DPS capability (step 720). The UE does not expect to have a transmission scheduled by a DCI format on the MCG in a PDCCH reception having a first symbol earlier than or equal to the first symbol of a transmission opportunity on the SCG. The last symbol of time and overlaps with the transmission opportunity on the SCG, where the UE indicates the first DPS capability (step 730) And when the UE indicates the second DPS capability (step 740) in and The UE is in all cells of MCG and SCG and The maximum value of the corresponding values.

[0122] In the following, For example, based on the configuration on MCG and SCG, and Can be corresponding Then when the UE indicates the first value of the DPS capability (DPS capability 1) or the corresponding hour, When the UE indicates a second value of the DPS capability (DPS capability 2),

[0123] The DPS for DC operation relies on the MCG scheduler, which ensures that the time delay T of UE transmission on the MCG from the end of the associated PDCCH reception is offset , thereby ensuring that the UE does not need to adjust the transmission power on the MCG or SCG due to overlapping transmissions on the MCG. In addition, the power allocation for transmissions on the MCG is prioritized. As mentioned earlier, in order to maximize the throughput / spectral efficiency and coverage gain from DPS, T offset The value of is important because too small a value may not meet the UE processing requirements, while too large a value reduces the gain from DPS operation in DC. offset depending on and Depending on the configuration of several parameters that the UE has on the SCG, in particular the configuration of the UE PUSCH processing / timing capabilities, and the configuration of CSI reporting on PUSCH transmissions for DPS capability 1, SCS of active UL BWP, etc., the MN / MCG needs to be aware of the configuration of these parameters on the SCG. This awareness is not always possible, as some of these parameters can be changed by physical layer signaling (e.g. active BWP) and the SCG can also modify those parameters without involving the MCG. In this case, the MN can negotiate with the SN (Also known as ) value, and T offset Calculated as The SN may also reject the negotiation with the MN to avoid any restriction on the UE's configuration of permitted parameters.

[0124] In the second embodiment, when the SN refuses to negotiate with the MN MN must determine the value of The value of SCG The actual value will always be less than or equal to

[0125] For the configuration of the UE on the SN, the MN will need to assume the following:

[0126] a) Configure PUSCH processing / timing capability 1

[0127] b) If at least one cell of the SCG has a carrier frequency in a first frequency range (FR1) below frequencies of 6 GHz, the UEs of the cell are configured with an SCS configuration μ=0 (15 kHz SCS).

[0128] c) For SCS configuration μ=0 (15kHz SCS), A-CSI multiplexing in PUSCH results in a maximum possible Z value equal to 40 symbols.

[0129] Then,

[0130] a) When the UE declares DPS capability 1,

[0131] b) When the UE declares DPS capability 2,

[0132] a. If the UE indicates the capability of BWP change, then milliseconds (for SCS configuration μ=0)

[0133] b. If the UE does not have the capability to indicate a BWP change, then milliseconds (for SCS configuration μ=0)

[0134] When the MN knows that all cells of the SN operate in a carrier frequency in the second frequency range (FR2) above 6 GHz, the MN knows that the UE operates with PUSCH processing / timing capability 1 and SCS configuration μ=3 (120 kHz SCS) and Z=152 symbols.

[0135] a) When the UE declares DPS capability 1,

[0136] b) When the UE declares DPS capability 2,

[0137] a. If the UE indicates the capability of BWP change, then millisecond

[0138] b. If the UE does not have the capability to indicate a BWP change, then millisecond

[0139] Figure 8 A method 800 for a MN to determine a maximum processing time of a transmission from a UE on a SN according to the present disclosure is shown. For example, the method 800 may be performed by any one of the BSs 101-103. Figure 8 The embodiment of method 800 in FIG. 8 is for illustration only; other embodiments may be implemented according to the principles of the present disclosure.

[0140] The MN assumes that the UE configured for DC operation is also configured with PUSCH processing / timing capability 1 and SCS configuration μ=0 on at least one cell of the SN (step 810). The MN also considers whether the UE indicates a first DPS capability or a second DPS capability for DC operation (step 820). When the UE indicates the first DPS capability, the MN considers PUSCH transmissions, where the UE multiplexes CSI reports based on corresponding requests in the DCI format that schedules PUSCH transmissions (A-CSI reports) to determine the maximum processing time for transmissions from the UE on the SN (step 830). When the UE indicates the second DPS capability, the MN considers PUSCH transmissions, where the UE multiplexes the UCI that the UE will transmit in the PUCCH (i.e., UCI in addition to the A-CSI report) to determine the maximum processing time for transmissions from the UE on the SN (840). In addition, the MN may consider whether the UE indicates a DPS capability for active BWP changes.

[0141] The third embodiment considers establishing a T between MN, SN and UE. offset The UE needs to know T offset , because T offset Several UE functions are identified, including scheduling of PUSCH / PUCCH / SRS transmissions and processing of TPC commands.

[0142] When the MN knows the UE configuration on the SN, the MN does not need to provide any additional information to the UE. Since the MN knows its own configuration for the UE, and since the UE knows the configuration from both the MN and the SN, the UE can determine T offset for

[0143] When the MN does not know the UE configuration on the SN, the MN needs to provide the UE with The value of T offset for Regardless of whether SN accepts MN's suggestion value.

[0144] Therefore, the UE may be configured to perform the following operations depending on whether the UE is provided with a higher layer parameter maxTprocSCG To determine T offset If the UE is not provided with maxTprocSCG, the UE determines If the UE is provided with the value maxTprocSCG, the UE determines

[0145] Fig. 9 A method 900 for a UE to determine a minimum time offset between the end of PDCCH reception and the start of a transmission for scheduling a transmission according to the present disclosure is shown. For example, the method 900 may be performed by a UE 116. Fig. 9 The embodiment of method 900 in FIG. 9 is for illustration only; other embodiments may be implemented according to the principles of the present disclosure.

[0146] The UE determines whether the UE is provided with a higher layer parameter maxTprocSCG through the MN (step 910). When the MN provides maxTprocSCG to the UE, the UE determines the time offset as in is the value of maxTprocSCG (step 920). When the MN does not provide the UE with maxTprocSCG, the UE determines the time offset to be (Step 930), wherein the UE determines based on the configuration of the transmission parameters (e.g., UE processing / timing capabilities) on the cell of the SN and based on whether the UE indicates the first DPS capability or the second DPS capability The UE determines based on the configuration of the transmission parameters on the cell of the MN and whether the UE indicates the first DPS capability or the second DPS capability. When the UE indicates the first DPS capability, Including the processing time for multiplexing A-CSI reports in PUSCH. When the UE indicates the second DPS capability, The processing time for multiplexing A-CSI reports in PUSCH is not included.

[0147] It is also possible to avoid using higher layer signaling to the UE to determine and T offset In this case, the UE may assume It is not determined based on the actual configuration at a given time on the SCG, such as SCS or UE PUSCH processing capabilities, but rather on all possible configurations on the SCG. for Then, when MN and SN determine T through a negotiation process, for example offset Maximum T greater than DPS capacity 2 offset The MN may configure the UE to operate with DPS capability 1 when the value is 0. The UE may then assume, for example, that milliseconds, or usually, the maximum T of DPS capability 1 offset When MN and SN determine T offset Maximum T not greater than DPS capacity 2 offset , the MN may configure the UE to operate with DPS capability 2. The UE may then assume, for example, that milliseconds (equal to SCS configuration μ = 0 ), or in general, if SCS configuration μ=0 is not configured (cannot be used) because any BWP on the SCG and SCS configuration μ=1 is configured (can be used), then the maximum T of DPS capability 2 offset , for example 0.50 milliseconds (equal to SCS configuration μ = 1 ). The BWP can be the active BWP or any configured BWP on the SCG.

[0148] Therefore, if no to the UE, then when the UE is configured for DPS capability 1, the UE assumes that T offset = 3 milliseconds, and when the UE is configured for DPS capability 2, the UE assumes T offset = 0.86 milliseconds. As an enhancement, the T of the corresponding DPS capability may be reduced based on the minimum possible SCS configuration μ that the UE may determine that the UE can operate on the active BWP of the MN or SN. offset The maximum value of .

[0149] Although the present disclosure has been described with example embodiments, various changes and modifications may be proposed by those skilled in the art. The present disclosure is intended to include such changes and modifications that fall within the scope of the appended claims. Any description in this application should not be construed as implying that any particular element, step or function is an essential element that must be included within the scope of the claims.

Claims

1. A method performed by a user equipment UE in a wireless communication system supporting dual connectivity, the method include: For dynamic power sharing DPS, identify subcarrier spacing SCS configuration information and information for physical uplink shared channel PUSCH processing capabilities; Determine the time offset T based on the SCS configuration information and the information for the PUSCH processing capability offset ; Based on the time offset T offset and the transmission on the primary cell group MCG scheduled by the downlink control information DCI format, determining the maximum power of the PUSCH transmission on the secondary cell group SCG; as well as Transmission is performed on the MCG and the PUSCH transmission is performed on the SCG, wherein a power of the PUSCH transmission on the SCG is determined based on the maximum power.

2. The method according to claim 1, further comprising: include: sending capability information indicating a capability of supporting the DPS for the dual connection; as well as Based on the capability information, information related to dynamic power sharing (DPS) for the dual connectivity is received.

3. The method according to claim 2, in, Based on the capability to support the DPS, the time offset T offset is determined as one of the first maximum value or the second maximum value, wherein the first maximum value is a maximum value between a processing time for multiplexing uplink control information UCI in a PUSCH transmission on the MCG and a processing time for multiplexing UCI in a PUSCH transmission on the SCG, wherein the UCI does not include a channel state information CSI report triggered by a DCI format, and The second maximum value is a maximum value between a processing time for multiplexing a CSI report in a PUSCH transmission on the MCG and a processing time for multiplexing a CSI report in a PUSCH transmission on the SCG, wherein the CSI report is triggered by a DCI format.

4. The method according to claim 1, further comprising: include: Determine the total power of transmissions on the MCG that overlap with transmission opportunities on the SCG Maximum power for receiving transmissions on the MCG and the SCG Configuration information; as well as The maximum power P of the transmission received on the SCG SCG Configuration information, Among them, the maximum power of the PUSCH transmission on the SCG is and The minimum value between It is the P SCG The linear value of is the The linear value of Among them, the power of the PUSCH transmission on the SCG is not greater than the maximum power.

5. The method according to claim 1, further comprising: include: Determine total power to include a power for transmission on the MCG, the power for transmission on the MCG being adjusted based on a value of a transmission power control TPC command in the second DCI format only if the second DCI format is provided by a second PDCCH reception, the second PDCCH reception being at least the time offset T before the start of the PUSCH transmission on the SCG offset End of wherein the transmission on the MCG is configured by higher layer signaling, and The transmission on the MCG includes at least one of PUSCH, physical uplink control channel PUCCH, physical random access channel PRACH and sounding reference signal SRS.

6. A user equipment UE in a wireless communication system supporting dual connectivity, include: Transceiver; as well as a processor operatively connected to the transceiver and configured to: For dynamic power sharing DPS, identify subcarrier spacing SCS configuration information and information for physical uplink shared channel PUSCH processing capabilities; Determine the time offset T based on the SCS configuration information and the information for the PUSCH processing capability offset ; as well as Based on the time offset T offset and the transmission on the primary cell group MCG scheduled by the downlink control information DCI format, determining the maximum power of the PUSCH transmission on the secondary cell group SCG; as well as The transceiver is controlled to perform transmission on the MCG and to perform the PUSCH transmission on the SCG, wherein the power of the PUSCH transmission on the SCG is determined based on the maximum power.

7. The UE according to claim 6, wherein the transceiver is further configured to: sending capability information indicating a capability to support the DPS for the dual connectivity; and Based on the capability information, information related to dynamic power sharing (DPS) for the dual connectivity is received.

8. The UE according to claim 7, in, Based on the capability to support the DPS, the time offset T offset is determined as one of the first maximum value or the second maximum value, wherein the first maximum value is a maximum value between a processing time for multiplexing uplink control information UCI in a PUSCH transmission on the MCG and a processing time for multiplexing UCI in a PUSCH transmission on the SCG, wherein the UCI does not include a channel state information CSI report triggered by a DCI format, and The second maximum value is a maximum value between a processing time for multiplexing a CSI report in a PUSCH transmission on the MCG and a processing time for multiplexing a CSI report in a PUSCH transmission on the SCG, wherein the CSI report is triggered by a DCI format.

9. The UE according to claim 6, The processor is further configured to: Determine the total power of transmissions on the MCG that overlap with transmission opportunities on the SCG The transceiver is also configured to: Maximum power for receiving transmissions on the MCG and the SCG configuration information; and The maximum power P of the transmission received on the SCG SCG Configuration information, in, The maximum power of the PUSCH transmission on the SCG is and The minimum value between is the P SCG The linear value of is the The linear value of Among them, the power of the PUSCH transmission on the SCG is not greater than the maximum power.

10. The UE according to claim 6, in, The processor is further configured to: determine the total power to include a power for transmission on the MCG, the power for transmission on the MCG being adjusted based on a value of a transmission power control TPC command in the second DCI format only if the second DCI format is provided by a second PDCCH reception, the second PDCCH reception being at least the time offset T before the start of the PUSCH transmission on the SCG offset End of wherein the transmission on the MCG is configured by higher layer signaling, and The transmission on the MCG includes at least one of PUSCH, physical uplink control channel PUCCH, physical random access channel PRACH and sounding reference signal SRS.

11. A base station in a wireless communication system supporting dual connectivity, the base station include: processor; as well as a transceiver operably connected to the processor, the transceiver being configured to: Sending downlink control information DCI format for scheduling uplink transmission on the master cell group MCG, and receiving an uplink signal on the MCG and a physical uplink shared channel PUSCH on a secondary cell group SCG, The maximum power of the PUSCH on the SCG is based on the time offset T offset and the uplink transmission on the MCG determined, Wherein, the time offset T offset is determined based on the subcarrier spacing SCS configuration information and the information of the PUSCH processing capability for dynamic power sharing DPS, and Wherein, the PUSCH on the SCG is received with a power determined based on a maximum power.

12. The base station of claim 11, wherein the transceiver is further configured to: receiving capability information indicating a capability to support the DPS for the dual connectivity, and Based on the capability information, sending information related to dynamic power sharing DPS for the dual connection, in, The uplink transmission on the MCG overlaps with the transmission opportunity on the SCG.

13. The base station according to claim 12, in, The last symbol of the physical control channel PDCCH including the DCI format is earlier than the start of reception of the PUSCH on the SCG by at least the time offset T offset , Wherein, based on the capability of supporting the DPS, the time offset T offset is determined as one of the first maximum value or the second maximum value, The second maximum value is based on a first processing time for multiplexing a channel state information CSI report triggered by a DCI format in a PUSCH, The first maximum value is based on a second processing time for multiplexing uplink control information UCI in the PUSCH, wherein the UCI does not include a CSI report triggered by a DCI format.

14. The base station according to claim 12, in, The transceiver is further configured to transmit a second PDCCH providing a second DCI format, the second DCI format including a transmit power control TPC command, and Wherein, in a case where the transmission opportunity on the MCG starts at at least the time offset after the end of the second PDCCH transmission, the transmission power control TPC command is applied to the second PUSCH transmission configured by higher layer signaling.

15. The base station according to claim 11, in, The transceiver is further configured to transmit a second PDCCH providing a second DCI format, The second DCI format triggers the transmission of a physical random access channel (PRACH), or the second DCI format triggers the transmission of a sounding reference signal SRS, and The PRACH transmission starts at at least the time offset after the second PDCCH transmission ends.

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