Method and device in communication system

Abstract

A method and apparatus in a communication system are provided. The method comprises the following steps: monitoring a first physical channel; determining, based on the first physical channel, whether to be triggered to receive a second physical channel, the second physical channel carrying first information related to authorization of uplink transmission or downlink reception of at least one UE, the at least one UE including a UE; and transmitting an uplink signal or receiving a downlink signal based on at least one of the first physical channel or the second physical channel.

Description

TECHNICAL FIELD

[0001] The disclosure relates to a communication technology, and more particularly, to a method and apparatus in a communication system. BACKGROUND

[0002] Considering the development of wireless communication generation after generation, these technologies have been mainly developed targeting services for humans, such as voice calls, multimedia services, and data services. As the commercialization of 5th-generation (5G) communication systems advances, it is expected that the number of connected devices will grow exponentially. These will be increasingly connected to communication networks. Examples of the Internet of Things can include vehicles, robots, drones, home appliances, displays, smart sensors connected to various infrastructures, construction machinery, and factory equipment. Mobile devices are expected to evolve in various forms, such as augmented reality glasses, virtual reality headsets, and hologram devices. There are ongoing efforts to develop improved 6G communication systems in order to provide various services by connecting hundreds of billions of devices and things in the 6th-generation (6G) era. For these reasons, 6G communication systems are referred to as beyond 5G systems.

[0003] It is expected that 6G communication systems, which will be commercialized around 2030, will have a peak data rate of tera (1,000 giga) bps and a radio latency of less than 100 μsec, and thus will be 50 times the data rate of 5G communication systems and have 1 / 10 the radio latency thereof.

[0004] To achieve such a high data rate and an ultra-low latency, implementation of 6G communication systems in terahertz bands (e.g., 95GHz to 3THz bands) has been considered. It is expected that, due to the path loss and atmospheric absorption in the terahertz bands greater than those in the millimeter wave (mmWave) bands introduced in 5G, the technologies capable of securing the signal transmission distance (i.e., coverage) will become more crucial. As major technologies to secure coverage, there is a need for developing radio frequency (RF) elements, antennas, new waveforms having better coverage than orthogonal frequency division multiplexing (OFDM), beamforming, and massive multiple input multiple output (MIMO), full dimensional MIMO (FD-MIMO), array antennas, and multi-antenna transmission technologies such as large-scale antennas. In addition, there are ongoing discussions on new technologies to improve signal coverage in terahertz bands, such as lenses and antennas based on metamaterials, orbital angular momentum (OAM), and reconfigurable intelligent surface (RIS).

[0005] In addition, in order to improve the spectral efficiency and overall network performance, the following technologies have been developed for 6G communication systems: a full duplex technology for enabling uplink transmission and downlink transmission to use the same frequency resource at the same time; a network technology that comprehensively uses satellites, high-altitude platform stations (HAPS), etc.; an improved network structure for supporting mobile base stations, etc., and enabling network operation optimization and automation, etc.; a dynamic spectrum sharing technology via collision avoidance based on spectrum usage prediction; the use of artificial intelligence (AI) in wireless communications by utilizing AI from the design stage of developing 6G and internalizing end-to-end AI support functions to improve overall network operations; and next-generation distributed computing technology that overcomes the limitations of user equipment (UE) computing capabilities through ultra-high-performance communication and computing resources available on the network, such as mobile edge computing (MEC), the cloud, etc. In addition, attempts are continuing to strengthen connectivity between devices, optimize networks, promote the softwareization of network entities, and increase the openness of wireless communications by designing new protocols to be used in 6G communication systems, developing mechanisms for implementing a hardware-based secure environment and secure use of data, and developing technologies for maintaining privacy.

[0006] It is expected that research and development of 6G communication systems including hyper-connectivity of person to machine (P2M) and machine to machine (M2M) will bring the next hyper-connected experience. In particular, it is expected that services such as truly immersive extended reality (XR), high-fidelity mobile holograms, and digital replicas will be provided through 6G communication systems. In addition, services such as remote surgery for security and reliability enhancement, industrial automation, and emergency response will be provided through 6G communication systems, so that the technology can be applied to various fields such as industry, healthcare, automobiles, and home appliances. SUMMARY

[0007] According to some aspects of the disclosure, a method performed by a UE in a communication system is provided. The method includes monitoring a first physical channel; determining whether to receive a second physical channel based on the first physical channel, the second physical channel carrying first information related to a grant for uplink transmission or downlink reception of at least one UE, the at least one UE including the UE; and transmitting an uplink signal or receiving a downlink signal based on at least one of the first physical channel or the second physical channel.

[0008] According to some aspects of the present disclosure, a method performed by a base station in a communication system is provided. The method comprises: transmitting, to a user equipment (UE), a first physical channel; and receiving, from the UE, or transmitting, to the UE, an uplink or downlink signal based on at least one of the first physical channel or a second physical channel, wherein whether the UE is triggered to receive the second physical channel is determined based on the first physical channel, the second physical channel carries first information related to a grant of uplink transmission or downlink reception of at least one UE, the at least one UE includes the UE.

[0009] In connection with one or more aspects of the above-described method performed by a terminal or method performed by a base station, for example, the first physical channel comprises at least one of: a physical downlink control channel (PDCCH); a sequence-based physical channel.

[0010] In connection with one or more aspects of the above-described method performed by a terminal or method performed by a base station, for example, the sequence-based physical channel only carries the sequence and is monitored by the at least one UE on the same physical resource.

[0011] In connection with one or more aspects of the above-described method performed by a terminal or method performed by a base station, for example, the sequence is a common sequence configured for the at least one UE, wherein whether the second physical channel is triggered to be received is determined based on a detection result of the common sequence.

[0012] In connection with one or more aspects of the above-described method performed by a terminal or method performed by a base station, for example, the sequence is a dedicated sequence configured for one or more of the at least one UE, the one or more of the at least one UE includes the UE, wherein whether the second physical channel is triggered to be received is determined based on a detection result of the dedicated sequence.

[0013] In connection with one or more aspects of the above-described method performed by a terminal or method performed by a base station, for example, monitoring the first physical channel comprises: monitoring the first physical channel based on a first radio network temporary identifier (RNTI) associated with the first physical channel to determine whether the second physical channel is triggered to be received.

[0014] In connection with one or more aspects of the above-described method performed by a terminal or method performed by a base station, for example, the RNTI associated with the first physical channel is a RNTI specific to a UE group or a RNTI specific to a cell for transmission of the first physical channel.

[0015] In conjunction with one or more aspects of the method described above as being performed by a terminal or the method described above as being performed by a base station, for example, the downlink control information carried by the first physical channel includes indication information, the indication information being used to indicate whether the second physical channel is triggered to be received.

[0016] In conjunction with one or more aspects of the method described above as being performed by a terminal or the method described above as being performed by a base station, for example, the indication information is used to indicate whether one or more UEs are triggered to receive the second physical channel, wherein the one or more UEs are associated with the same indication of whether the second physical channel is triggered to be received.

[0017] In conjunction with one or more aspects of the method described above as being performed by a terminal or the method described above as being performed by a base station, for example, the indication information is used to indicate whether one or more UE subgroups are triggered to receive the second physical channel, each UE subgroup including at least one UE that is associated with the same indication of whether the second physical channel is triggered to be received.

[0018] In conjunction with one or more aspects of the method described above as being performed by a terminal or the method described above as being performed by a base station, for example, UE identification information is included in the downlink control information carried by the first physical channel, wherein whether the second physical channel is triggered to be received is determined based on whether the UE identification information included in the downlink control information matches UE identification information of the UE.

[0019] In conjunction with one or more aspects of the method described above as being performed by a terminal or the method described above as being performed by a base station, for example, the first physical channel carries information related to time domain resource allocation and / or frequency domain resource allocation of the second physical channel, wherein the allocated physical resources of the second physical channel are determined based on the information related to time domain resource allocation and / or frequency domain resource allocation of the second physical channel.

[0020] In conjunction with one or more aspects of the method described above as being performed by a terminal or the method described above as being performed by a base station, for example, the determination of being triggered to receive the second physical channel on the allocated physical resources is based on at least one of: the allocated physical resources meeting minimum physical resource requirements for the second physical channel transmission; the allocated physical resources not being used by a transmission with a higher priority than the second physical channel transmission; or the allocated physical resources being available for downlink transmission or fixed wireless access (FWA) downlink transmission.

[0021] In conjunction with one or more aspects of the method described above as being performed by a terminal, for example, the method further includes, in a case where the UE is triggered to receive the second physical channel, receiving the second physical channel.

[0022] In conjunction with one or more aspects of the method described above performed by a base station, for example, the method further includes transmitting the second physical channel in a case that the UE is triggered to receive the second physical channel.

[0023] In conjunction with one or more aspects of the method described above performed by a terminal or the method described above performed by a base station, for example, in a case that a plurality of UEs are triggered by the first physical channel to receive the second physical channel, each of the plurality of UEs respectively receives the second physical channel scrambled by UE identification information of the UE.

[0024] In conjunction with one or more aspects of the method described above performed by a terminal or the method described above performed by a base station, for example, in a case that a plurality of UEs are triggered by the first physical channel to receive the second physical channel, the plurality of UEs detect a same second physical channel carrying first information, wherein the second physical channel is scrambled by identification information common to the plurality of UEs, wherein the first information includes UE identification information of a specific UE among the plurality of UEs, and wherein it is determined that the UE is scheduled to transmit an uplink signal or receive a downlink signal based on the UE identification information of the specific UE included in the first information matching the UE identification information of the UE.

[0025] In conjunction with one or more aspects of the method described above performed by a terminal or the method described above performed by a base station, for example, in a case that a plurality of UEs are triggered by the first physical channel to receive the second physical channel, the plurality of UEs detect a same second physical channel carrying first information, wherein the second physical channel is scrambled by UE identification information of a single UE among the plurality of UEs.

[0026] In conjunction with one or more aspects of the method described above performed by a terminal or the method described above performed by a base station, for example, the second physical channel includes at least one of a downlink shared channel or a downlink control channel.

[0027] In conjunction with one or more aspects of the method described above performed by a terminal or the method described above performed by a base station, for example, the physical resource of the second physical channel is determined based on at least one of the first physical channel or higher layer signaling.

[0028] In conjunction with one or more aspects of the method described above performed by a terminal or the method described above performed by a base station, for example, the physical resource of the second physical channel is determined based on an association between the physical resource of the first physical channel and the physical resource of the second physical channel.

[0029] In conjunction with one or more aspects of the method described above performed by a terminal or the method performed by a base station, for example, the association includes at least one of: a time domain resource location of the first physical channel is same as or has a predetermined time domain offset from a time domain resource location of the second physical channel; or a frequency domain resource location of the first physical channel is same as or has a predetermined frequency domain offset from a frequency domain resource location of the second physical channel.

[0030] In conjunction with one or more aspects of the method described above performed by a terminal or the method performed by a base station, for example, the first physical channel carries second information related to a grant of the second physical channel, wherein the second information includes at least one of: an indication of a downlink control information format of the second physical channel; an indication of a modulation and / or coding scheme of the second physical channel; an indication of a number of payload bits of the second physical channel; an indication of a time offset between a time domain resource of the second physical channel and a time domain resource of an uplink transmission and / or a downlink reception scheduled by the second physical channel.

[0031] In conjunction with one or more aspects of the method described above performed by a terminal or the method performed by a base station, for example, the first physical channel carries third information related to a grant of an uplink transmission or a downlink reception of the at least one UE.

[0032] In conjunction with one or more aspects of the method described above performed by a terminal or the method performed by a base station, for example: the first information is included in the third information; and / or the first information is different from the third information; and / or the first information includes information related to the grant of the uplink transmission or the downlink reception of the at least one UE other than the third information.

[0033] In conjunction with one or more aspects of the method described above performed by a terminal, for example, transmitting or receiving the uplink signal or the downlink signal based on at least one of the first physical channel or the second physical channel includes: transmitting or receiving the uplink signal or the downlink signal based on the third information carried by the first physical channel and / or the first information carried by the second physical channel.

[0034] In conjunction with one or more aspects of the method performed by a base station, for example, receiving or transmitting the uplink signal or the downlink signal based on at least one of the first physical channel or the second physical channel includes: receiving or transmitting the uplink signal or the downlink signal based on the third information carried by the first physical channel and / or the first information carried by the second physical channel.

[0035] In conjunction with one or more aspects of the method described above as being performed by a terminal or the method described above as being performed by a base station, for example, the third information carried by the first physical channel and / or the first information carried by the second physical channel comprises at least one of: an uplink / downlink identifier, a frequency domain resource allocation, a time domain resource allocation, a modulation and coding scheme, a frequency hopping identifier, a redundancy version, a hybrid automatic repeat request (HARQ) process number, a new data indication, a power control command, a downlink assignment index, or an uplink control channel related parameter.

[0036] In conjunction with one or more aspects of the method described above as being performed by a terminal or the method described above as being performed by a base station, for example, the third information carried by the first physical channel and / or the first information carried by the second physical channel comprises at least one of: an uplink / downlink identifier, a frequency domain resource allocation, a time domain resource allocation, a modulation and coding scheme, a frequency hopping identifier, a redundancy version, a hybrid automatic repeat request (HARQ) process number, a new data indication, a power control command, a downlink assignment index, or an uplink control channel related parameter.

[0037] In conjunction with one or more aspects of the method described above as being performed by a terminal or the method described above as being performed by a base station, for example, the first information carried by the second physical channel further comprises at least one of: a bandwidth part (BWP) indication, a carrier indication, an antenna port indication, a code block group related indication, a precoding related indication, a phase tracking reference signal related indication, an update or offset of an uplink resource allocation and / or a downlink resource allocation indicated by the third information.

[0038] According to some aspects of the present disclosure, a UE in a communication system is also provided. The UE includes a transceiver; and one or more processors coupled with the transceiver and configured to perform one or more aspects of the above-described methods performed by a UE.

[0039] According to some aspects of the present disclosure, a base station in a communication system is also provided. The base station includes a transceiver; and one or more processors coupled with the transceiver and configured to perform one or more aspects of the above-described methods performed by a base station.

[0040] According to some aspects of the present disclosure, a computer-readable storage medium having stored thereon one or more computer programs is also provided, wherein the one or more computer programs, when executed by one or more processors, can implement one or more aspects of the above-described methods performed by a UE.

[0041] According to some aspects of the present disclosure, there is also provided a computer- readable storage medium having stored thereon one or more computer programs which, when executed by one or more processors, can implement one or more aspects of the methods described above as performed by a base station. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments of the present disclosure will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present disclosure, rather than limit the present disclosure, and the drawings of the present disclosure include:

[0043] Figure 1 A schematic diagram of an example wireless network is shown in accordance with some embodiments of the present disclosure;

[0044] Figure 2 An example base station is shown in accordance with some embodiments of the present disclosure;

[0045] Figure 3 An example user equipment (UE) is shown in accordance with some embodiments of the present disclosure;

[0046] Figure 4 A schematic diagram of a configuration of a fixed wireless access (FWA) is shown in accordance with some embodiments of the present disclosure;

[0047] Figure 5 A flowchart of a method performed by a UE in accordance with some example embodiments of the present disclosure is shown;

[0048] Figure 6 A flowchart of a method performed by a UE in accordance with some example embodiments of the present disclosure is shown;

[0049] Figure 7 A flowchart of a method performed by a UE in accordance with some example embodiments of the present disclosure is shown;

[0050] Figure 8 A flowchart of a method performed by a base station in accordance with some example embodiments of the present disclosure is shown. DETAILED DESCRIPTION

[0051] Before undertaking the detailed description below, it can be advantageous to set forth definitions of certain words and phrases used throughout this patent document: The term "connect" 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 one another. The terms "transmit," "receive," and "communicate / transfer," as well as derivatives thereof, encompass both direct and indirect communication. The terms "include," "comprise," and "comprising," and derivatives thereof, mean inclusion without limitation. The term "or" is composable, meaning and / or. The phrase "associated with," as well as derivatives thereof, means to include, be included within, interconnect with, contain, be contained within, connect to or with, couple to or with, be communicable with, cooperate with, interleave, be proximate to, be bound to or with, have a property of, have relations with, or have relations to, and the like. The term "controller" means any device, system or part thereof that controls at least one operation. Such a controller can be implemented in hardware or as combinations of hardware and software and / or firmware. The functionality associated with any particular controller, whether local or remote, can be centralized or distributed, whether locally or remotely. 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 can be used and only one item from the list can be needed. 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 only A, only B, or only C. Likewise, the term "set" means one or more. Thus, a set of items can be a single item, or a collection of two or more items.

[0052] Moreover, various functions described below can be implemented or supported by one or more computer programs, each of which is formed from 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, sets of instructions, procedures, functions, objects, classes, instances, related data, or a portion thereof. The phrase "computer readable medium" includes any medium that can be accessed by a computer including volatile and nonvolatile media, removable and non-removable media. By way of example, and not limitation, computer readable media can comprise memory (RAM, ROM, PROM, EPROM, EEPROM, or Flash memory), magnetic or optical disks, or other storage media. The term computer readable program code includes any expression of instructions in any language capable of being executed by a computer including assemblies, instructions, scripts, object code, machine code, or either source or object code combinations thereof. The phrase "computer readable medium" excludes signals per se.

[0053] Definitions for other certain words and phrases are provided throughout this patent document. Those of ordinary skill in the art will understand that such

[0054] The drawings included in the present disclosure and the description thereof are solely for the purpose of illustration and should not be deemed to limit the scope of the present disclosure in any way. Furthermore, those skilled in the art will recognize that the principles of the present disclosure can be practiced with any wireless communication system, and in any appropriate arrangement.

[0055] The following Figures 1 to 3 Various embodiments of the present disclosure implemented in a wireless communication system are described. Figures 1 to 3 The description of the various embodiments of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Numerous modifications, adaptations, and variations are possible within the scope of the various embodiments of the present disclosure.

[0056] Figure 1 An example wireless network according to an embodiment of the present disclosure is illustrated. Figure 1 The embodiment of the wireless network shown in FIG. 1 is for illustration only. Other embodiments of the wireless network 100 could be used without departing from the scope of the present disclosure.

[0057] As Figure 1As shown, the wireless network includes a base station (next generation nodeB, gNB or gNodeB) 101, a gNB 102, and a gNB 103. The gNB 101 communicates with the gNB 102 and the gNB 103. The gNB 101 also communicates with at least one network 130, such as the Internet, a proprietary Internet Protocol (IP) network, or other data network.

[0058] The gNB 102 provides wireless broadband access to the network 130 for a first plurality of user equipment devices (UEs) within a coverage area 120 of the gNB 102. The first plurality of UEs includes a UE 111, which can be located in a small business (SB); a UE 112, which can be located in an enterprise (E); a UE 113, which can be located in a WiFi hot spot (HS); a UE 114, which can be located in a first residence (Rl); a UE 115, which can be located in a second residence (R2); and a UE 116, which can be a mobile device (M), such as a cell phone, a wireless laptop, a wireless personal digital assistant (PDA), and so on. The gNB 103 provides wireless broadband access to the network 130 for a second plurality of UEs within a coverage area 125 of the gNB 103. The second plurality of UEs includes the UE 115 and the UE 116, as well as subscriber stations (SSs), e.g., UEs 117, 118, and 119. In some embodiments, one or more of the gNBs 101-103 can communicate with each other and with the UEs 111-116 using existing wireless communication techniques, and one or more of the UEs 111-119 can communicate directly with each other (e.g., UEs 117-119) using other existing or proposed wireless communication techniques.

[0059] 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 transmit point, transmit-receive point, base station, eNodeB or eNB, 5G base station (gNB), macrocell, femtocell, wireless fidelity (Wi-Fi) access point, or other wirelessly enabled devices. A base station can provide wireless access to a plurality of UEs 115 using one or more wireless communication protocols, such as 3GPP 5G New Radio (NR), Long Term Evolution (LTE), LTE-Advanced (LTE-A), High Speed Packet Access (HSPA), Wi-Fi 802.11a / b / g / n / ac, etc. For the sake of convenience, the various terms for apparatuses and functions of a base station can be used interchangeably in this patent document to refer to a network infrastructure component providing wireless access to remote terminals. Also, depending on the network type, the term "user equipment" (UE) can refer to any component such as mobile station, subscriber station, remote terminal, wireless terminal, receive point, or user device. For the sake of convenience, the various terms for apparatuses and functions of a UE can be used interchangeably in this patent document to refer to a remote wireless equipment wirelessly accessing a BS whether the UE is a mobile device such as a mobile telephone or smartphone or is normally considered a stationary device such as a desktop computer or vending machine.

[0060] Dotted lines show the approximation of the overall coverage area 120 and 125 as represented by mapping or other cartographic techniques. It should be clear that the coverage areas associated with gNBs such as coverage areas 120 and 125 can have other shapes, including irregular shapes, depending on the configuration of gNBs and variations in the wireless environment associated with natural and man-made obstructions.

[0061] As described in more detail below, one or more of UEs 111-119 include circuitry, programming or a combination thereof. In certain embodiments, one or more of gNBs 101-103 include circuitry, programming or a combination thereof.

[0062] Although Figure 1 One example of a wireless network is illustrated, but Figure 1Various changes can be made. For example, wireless network 100 could include any number of gNBs and any number of UEs in any suitable arrangement. Also, gNB 101 could communicate directly with any number of UEs and provide those UEs access to network 130 by providing wireless broadband access to the network 130. Similarly, each gNB 102-103 could communicate directly with network 130 and provide UEs access to network 130 by providing wireless broadband access to the network 130. In addition, gNBs 101, 102, and / or 103 could provide access to other or additional external networks, such as external telephone networks or other types of data networks.

[0063] Figure 2 An example base station is shown in accordance with example embodiments of the present disclosure. Figure 2 The embodiment of gNB 102 shown in FIG. 1 is merely one example. Indeed, gNBs having different embodiments Figure 1 The gNBs 101 and 103 of FIG. 1 can have the same or similar configuration. However, gNBs come in a wide variety of configurations, and Figure 2 The scope of the present disclosure is not limited to any particular implementation of a gNB.

[0064] As Figure 2 As shown in FIG. 1, gNB 102 includes multiple antennas 200a-200n, multiple radio frequency (RF) transceivers 201a-201n, transmit (TX) processing circuitry 203, and receive (RX) processing circuitry 204. gNB 102 also includes controller / processor 205, memory 206, and backhaul or network interface (IF) 207.

[0065] The RF transceivers 201a-201n receive, from the antennas 200a-200n, incoming RF signals such as signals transmitted by UEs in the network 100. The RF transceivers 201a-201n down-convert the incoming RF signals to generate intermediate frequency (IF) or baseband signals. The IF or baseband signals are sent to the RX processing circuitry 204, which generates processed baseband signals by filtering, decoding, and / or digitizing the baseband or IF signals. The RX processing circuitry 204 transmits the processed baseband signals to the controller / processor 205 for further processing.

[0066] The TX processing circuitry 203 receives analog or digital data (such as voice data, web data, e-mail, or interactive video game data) from the controller / processor 205. The TX processing circuitry 203 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate processed baseband or IF signals. The RF transceivers 201a-201 n receive the outgoing processed baseband or IF signals from the TX processing circuitry 203 and up-convert the signals to RF signals that are transmitted via the antennas 201a-201 n.

[0067] The controller / processor 205 can include one or more processors or other processing devices to manage the overall operation of the gNB 102. For example, the controller / processor 205 can control the reception of forward channel signals and the transmission of reverse channel signals by the RF transceivers 201a-201 n, the RX processing circuitry 204, and the TX processing circuitry 203 in accordance with well-known principles. The controller / processor 205 can support additional functions as well, such as more advanced wireless communication functions.

[0068] For instance, the controller / processor 205 can support beamforming or directional routing operations in which outgoing signals from multiple antennas 200a-200n are weighted differently to effectively "steer" the outgoing signals in a desired direction. Any of a plurality of other functions can be supported in the gNB 102 by the controller / processor 205 as well.

[0069] The controller / processor 205 is also capable of executing programs and other processes located in the memory 206, such as an operating system (OS). The controller / processor 205 can move data into or out of memory 206 as

[0070] The controller / processor 205 is also connected to the backhaul or network interface 207. The backhaul or network interface 207 allows the gNB 102 to communicate with other devices or systems over a backhaul connection or over a network. It will be appreciated that the interface 207 can support communications over any suitable wired or wireless connection. For example, when the gNB 102 is implemented as part of a cellular communication system such as a 5G, LTE, or LTE-A cellular communication system, the interface 207 can allow the gNB 102 to communicate with other gNBs over a wired or wireless backhaul connection. When the gNB 102 is implemented as an access point, the interface 207 can allow the gNB 102 to communicate with other devices, such as other access points, over a wired or wireless local area network or over a wired or wireless connection to a larger network such as the Internet. The interface 207 includes any suitable structures for enabling communications over, for example, an Ethernet or RF transceiver.

[0071] Memory 206 is connected to controller / processor 205. A portion of memory 206 may include random access memory (RAM), and another portion of memory 206 may include flash memory or other read-only memory (ROM).

[0072] although Figure 2 An example of gNB 102 is shown, but it is possible to see more. Figure 2 Various changes can be made. For example, gNB 102 can include any number of Figure 2 Each component is shown in the diagram. As a specific example, an access point may include multiple interfaces 207, and the controller / processor 205 may support routing functionality to route data between different network addresses. As another specific example, although shown as a single instance of TX processing circuitry 203 and a single instance of RX processing circuitry 204, gNB102 may include multiple instances of each (such as one per RF transceiver). For example, Figure 2 The various components can be combined, further subdivided, or omitted, and additional components can be added as needed.

[0073] Figure 3 An example user equipment according to an embodiment of the present disclosure is shown. Figure 3 The embodiment of UE 116 shown is for illustrative purposes only, and Figure 1 UEs 111-115 and 117-119 can have the same or similar configurations. However, UEs appear in multiple configurations, and Figure 3 This disclosure is not intended to limit the scope to any particular implementation of the UE.

[0074] like Figure 3 As shown, UE 116 includes an antenna 301, a radio frequency (RF) transceiver 302, a TX processing circuit 303, a microphone 304, and a receive (RX) processing circuit 305. UE 116 also includes a speaker 306, a controller or processor 307, an input / output (I / O) interface (IF) 308, an input device 309, a touchscreen display 310, and memory 311. Memory 311 includes an OS 312 and one or more applications 313.

[0075] The RF transceiver 302 receives, from the antenna 301, incoming RF signals transmitted by gNBs of the network 100. The RF transceiver 302 down-converts the incoming RF signals to generate IF or baseband signals. The IF or baseband signals are sent to the RX processing circuitry 305, which generates processed baseband signals by filtering, decoding, and / or digitizing the baseband or IF signals. The RX processing circuitry 305 transmits the processed baseband signals to the speaker 306, for example, for voice data, or to the processor 307 for further processing, for example, for web browsing data.

[0076] The TX processing circuitry 303 receives analog or digital voice data from the microphone 304 or other outgoing baseband data (such as web data, e-mail, or interactive video game data) from the processor 307. The TX processing circuitry 303 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate processed baseband or IF signals. The RF transceiver 302 receives the outgoing processed baseband or IF signals from the TX processing circuitry 303 and up-converts the baseband or IF signals to RF signals that are transmitted via the antenna 301.

[0077] The processor 307 can include one or more processors or other processing devices and execute the OS 312 stored in the memory 311 in order to control the overall operation of the UE 116. For example, the processor 307 can control the reception of forward channel signals and the transmission of reverse channel signals by the RF transceiver 302, the RX processing circuitry 305, and the TX processing circuitry 303 in accordance with well-known principles. In some embodiments, the processor 307 includes at least one microprocessor or microcontroller.

[0078] The processor 307 is also capable of executing other processes and programs stored in memory 311, such as a process for CSI reporting on uplink channels. The processor 307 can move data into or out of memory 311 as required by the processes executing on the processor 307. In some embodiments, the processor 307 is configured to execute the applications 313 based on the OS 312 or in response to signals received from gNBs or an operator. The processor 307 is also coupled to the I / O interface 308, which provides the UE 116 with the ability to connect to other devices such as laptop computers and portable computers. The I / O interface 308 is the communication path between these accessories and the processor 307.

[0079] The processor 307 is also connected to the touch screen display 310. The user of the UE 116 can use the touch screen display 310 to enter data into the UE 116. The touch screen display 310 can 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 web sites.

[0080] The memory 311 is connected to the processor 307. A portion of the memory 311 can include a volatile RAM, and another portion, a non-volatile memory, for example, flash memory or other ROM.

[0081] Although Figure 3 One example of a UE 116 is shown, but various changes can be made Figure 3 For example, Figure 3 Various components in the UE 116 can be combined, further subdivided, or omitted and additional components can be added according to particular needs. As a particular example, the processor 307 can be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). Also, while Figure 3 Although the UE 116 is shown as a mobile telephone or smartphone, a UE can be configured to function as other types of mobile or stationary devices.

[0082] Note that the plurality of methods described in the exemplary embodiments of the present disclosure can be combined in any order. In one combination, a method can be performed once or more.

[0083] Note that the plurality of steps in the methods described in the exemplary embodiments of the present disclosure can be implemented in any order.

[0084] In the description of the exemplary embodiments of the present disclosure, “ / ” represents “and / or”. For example, “A / B” can mean A and / or B.

[0085] In the description of the exemplary embodiments of the present disclosure, “performing a predefined method (or step) if a predefined condition is satisfied” and “not performing a predefined method (or step) if a predefined condition is not satisfied” can be used interchangeably. “Not performing a predefined method (or step) if a predefined condition is satisfied” and “performing a predefined method (or step) if a predefined condition is not satisfied” can be used interchangeably.

[0086] In the description of the example embodiments of the present disclosure, "first", "second", and similar words do not indicate any order, quantity, or importance, but are only used to distinguish different components. Unless the context clearly indicates otherwise, the singular forms "a", "an", or "the" and the like do not indicate quantity restrictions, but indicate the existence of at least one. For example, a reference to "a component surface" includes a reference to one or more such surfaces.

[0087] As used herein, any reference to "one example" or "an example", "one embodiment" or "an embodiment" means that a particular element, feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. The appearances of the phrases "in one embodiment" or "in one example" in various places in the specification are not necessarily all referring to the same embodiment.

[0088] As used herein, "a part of something" means "at least some of the something", and thus can mean less than all of the something or all of the something. Therefore, "a part of something" includes the entire thing as a special case, i.e., the entire thing is an example of a part of the thing.

[0089] In the description of the example embodiments of the present disclosure, in order to determine whether a particular condition is met, expressions such as "greater than" or "less than" are used as examples, and expressions such as "greater than or equal to" or "less than or equal to" are also applicable and are not excluded. For example, a condition defined with "greater than or equal to" can be replaced with "greater than" (or vice versa), a condition defined with "less than or equal to" can be replaced with "less than" (or vice versa), and so on.

[0090] In the description of the example embodiments of the present disclosure, the term "comprise" or "include" and the like similar words mean that the elements or objects appearing before the word are encompassed by the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The words "connected" or "connected" and the like are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right", and the like are only used to indicate relative positional relationships, which can change accordingly when the absolute position of the described object changes.

[0091] In the description of the example embodiments of the present disclosure, the terms "identify", "identifier", and "identification information" can be used interchangeably.

[0092] In the description of the example embodiments of the present disclosure, a resource (which can also be referred to as a physical resource) can include a time domain resource (or time resource) and / or a frequency domain resource (or frequency resource).

[0093] In the description of the example embodiments of the disclosure, “time domain resource” or “time resource” can refer to or be used interchangeably with at least one of the following: symbol(s) (for example, OFDM symbol), time slot(s), sub-time slot(s), micro-time slot(s), or subframe(s).

[0094] In the description of the example embodiments of the disclosure, “frequency domain resource” or “frequency resource” can refer to or be used interchangeably with at least one of the following: channel(s), sub-channel(s), carrier(s), sub-carrier(s), resource block(s) (RB), resource element(s) (RE), physical resource block(s) (PRB), or resource block group(s) (RBG).

[0095] With the rapid development of mobile communication technology, higher requirements are put forward for the transmission rate of the network. In the process of deployment and development of communication (for example, 5G / 6G) technology, the large bandwidth and high rate advantages of high frequency communication are obvious, but also expose the problems of short transmission distance, high power consumption, high cost, etc., which are particularly prominent in millimeter wave, THz and other high frequency bands. To some extent, this limits large-scale application.

[0096] The transmission distance of a signal is inversely proportional to the working frequency. For the same base station transmission power and the same transmission distance, the higher the frequency of the transmitted signal, the greater the transmission path loss, and the weaker the signal strength received by the terminal. In order to meet the complete coverage of the cell of the high frequency signal, the base station transmission power can be increased or the base station construction density can be increased, but the sharp rise of the equipment cost and the base station energy consumption caused thereby becomes a major obstacle to the large-scale commercialization of high frequency communication.

[0097] Fixed wireless access (FWA) is a technology that uses customer premises equipment (CPE) to achieve broadband connection of a relatively fixed location site through the infrastructure (for example, wireless base station) of a mobile operator. FWA that can support 5G technology provides the potential of ultra-high speed, low latency and large capacity for next-generation wireless connection. In addition to home users, FWA can provide economic and convenient broadband access for small and micro enterprises, shops and temporary sites, and gradually begin to enter the industry Internet field of factory, park, mine, port and other scenes, and provide high-speed and low-latency 5G connection for Internet of Things terminals within a certain range.

[0098] In some areas where wired cables such as optical fibers cannot be laid (for reasons of cost, road right, building protection, etc.), FWA can provide network access for users. It avoids road right acquisition, pipeline excavation, cable laying, wall perforation and other construction work, greatly simplifies the network construction process, shortens the construction period, and saves costs. Therefore, for many operators, FWA is a means to rapidly develop user scale, and also a very cost-effective business model. From the perspective of social significance, FWA can help families in economically underdeveloped areas quickly have network connection, enjoy information dividends, and improve the quality of life. In addition, in the rural areas which are the main market of FWA, there is usually additional spectrum capacity due to low population density.

[0099] The existing CPE includes two parts, a communication module 401 that communicates with the base station and a forwarding module 402 that communicates with other terminal(s), as shown in Figure 4 The communication module 401 can operate as a UE (for example, an NR (here, NR can be replaced by an existing wireless communication network such as LTE, TD-SCDMA, GSM, or a future communication network, and the following embodiments are described by taking NR as an example) UE) to communicate with a base station (for example, an NR base station), receive data from the base station (for example, an NR base station), or send data to the base station (for example, an NR base station). The function of the forwarding module 402 can be similar to that of a network hotspot, providing services for one or more terminals in a specified area, sending data obtained from the signal receiving module 401 to different terminals, or receiving information sent by different terminals and forwarding it to the base station through the signal receiving module 401. The forwarding module 402 is connected to the communication module 401. The forwarding module 402 can pass uplink data to the communication module 401 for transmission to the base station, or can receive downlink data from the base station from the communication module. The communication module 401 and the forwarding module 402 can be two modules of the CPE, or two functions of one module. The connection form of the base station and the communication module 401 can include wireless connection (for example, via WiFi communication, Bluetooth communication, infrared data association (IrDA) communication, near field communication (NFC), Zigbee communication, mobile communication (such as 3G, 4G, 5G, etc.), etc.). The connection form of the forwarding module 402 and the terminal can include wired connection (for example, via coaxial cable, optical fiber cable, etc.) or wireless connection (for example, via WiFi communication, Bluetooth communication, IrDA communication, NFC, Zigbee communication, mobile communication (such as 3G, 4G, 5G, etc.), etc.). The functional entity corresponding to the communication module 401 of the CPE can be referred to as a CPE-type UE.

[0100] It is worth noting that the number of terminals connected with the forwarding module 401 of the CPE can be huge, and the traffic models of different terminals can also be different. For example, some terminals (such as digital televisions, etc.) are mainly for downlink traffic; some other terminals (such as Internet of Things sensor terminals, etc.) are mainly for uplink traffic. When the number of terminals connected with the CPE is huge and the types of terminals are rich (such as serving unmanned factories or enterprise parks, etc.), the CPE can have continuous and heavy uplink and / or downlink traffic requirements. In order to meet these traffic requirements, the CPE needs to be frequently scheduled for uplink transmission or downlink transmission, that is, the base station needs to frequently send a physical downlink control channel (PDCCH) carrying uplink or downlink scheduling grant information to the CPE.

[0101] Considering that the number of CPEs in the communication network can be large, in order to meet the potential scheduling requirements of multiple CPEs, the network side needs to reserve sufficient physical resources for PDCCH transmission of multiple CPEs. Generally, the reserved PDCCH resources are periodic (for example, the PDCCH search space in NR defines the time slot period in which the UE monitors the PDCCH, etc.), and the UE (which can be a CPE type UE and / or other types of UE, etc.) should monitor the PDCCH (for example, receive PDCCH candidates) on each time-frequency resource on which the PDCCH can be sent. Note that the network side configures the PDCCH search space for the UE according to the potential scheduling requirements of the UE, so not every PDCCH candidate actually has a PDCCH sent: only when actual scheduling occurs for the UE, the base station sends the PDCCH to the UE on the reserved PDCCH resource. However, even so, the reserved PDCCH physical resources are generally not used for data transmission again, so there is a great resource overhead. At the same time, due to the limitation of system bandwidth, the system frequency domain resources are limited, so the number of PDCCHs that can be supported at the same time is limited, and when the number of UEs in the network is large (including CPE type UEs or other types of UEs, etc.), PDCCH congestion can also occur, causing the scheduling delay of some UEs or CPEs to increase. It can be seen that how to guarantee the scheduling delay (such as the CPE scheduling delay) under the premise of limited PDCCH resource overhead, and / or further reduce the resource overhead required for scheduling grant information transmission, and improve the spectrum efficiency, is a problem that needs to be solved urgently for communication systems (such as FWA).

[0102] The present disclosure proposes a scheduling grant method, which relates to scheduling grant information of a UE (e.g., a CPE type UE / a UE with CPE capability, or other types of UEs, such as a normal UE), a sending method, and a related physical process of data transmission according to the scheduling grant information. The CPE type UE can be a functional entity of a communication module (e.g., the communication module 401) corresponding to a CPE. Based on the method proposed by the present disclosure, the resource overhead required for sending the scheduling grant information can be reduced, and the spectral efficiency of the system can be improved.

[0103] The scheduling grant method according to the example embodiments of the present disclosure can include the following operations: a UE receives (e.g., monitors) a first physical channel (e.g., which can be a common physical channel) for determining first grant information; based on the first grant information, the UE determines whether to be triggered (e.g., on an allocated physical resource) to receive a second physical channel carrying second grant information; and based on at least one of the first grant information or the second grant information, the UE transmits an uplink signal or receives a downlink signal. The first grant information can be at least used to determine whether to trigger the UE (e.g., on an allocated physical resource) to receive the second grant information (or a downlink physical channel carrying the second grant information, which can be referred to as a second physical channel in the example embodiments of the present disclosure). The second grant information can at least contain scheduling grant information of an uplink signal or a downlink signal transmission of at least one UE (e.g., including the UE). For example, the uplink signal can include but is not limited to a physical uplink shared channel (PUSCH), a sounding reference signal (SRS), a physical random access channel (PRACH), etc. The downlink signal can include but is not limited to a physical downlink shared channel (PDSCH), a channel state information reference signal (CSI-RS), etc. The first physical channel (e.g., the common physical channel) for transmitting the first grant information can include a PDCCH and / or a sequence-based physical channel. In some example embodiments, the first physical channel can be received by at least one UE. For example, the at least one UE can be configured / indicated to receive the first physical channel. The sequence-based physical channel can mean that the physical channel is associated with the sequence, e.g., is generated based on the sequence, or carries the sequence or a signal generated based on the sequence. In the description of the example embodiments of the present disclosure, if not otherwise indicated, “first grant information” and “first physical channel” can be used interchangeably, and “second grant information” and “second physical channel” can be used interchangeably. In the description of the example embodiments of the present disclosure, the naming of “first grant information” is only an example, and any suitable naming can be adopted, e.g., “first grant information” can be replaced by “information / indication related to the grant (e.g., indication) and / or scheduling of the second physical channel (reception)”. Similarly, the naming of “second grant information” is only an example, and any suitable naming can be adopted, e.g., “second grant information” can be replaced by “information / indication related to the grant and / or scheduling of uplink transmission and / or downlink reception”. According to some example embodiments of the present disclosure, the first grant information can be information carried by the first physical channel to indicate that one or more UEs are triggered (or whether to be triggered) to receive the second physical channel (e.g., to receive the second physical channel on a physical resource).Additionally or alternatively, the first grant information can be an indication for indicating one or more UEs are triggered (or not triggered) to receive the second physical channel, based on the first physical channel (e.g., based on a detection (e.g., a successful detection) of the first physical channel scrambled with a certain RNTI (e.g., a RNTI used for indicating / notifying whether the second physical channel is triggered to be received; or a RNTI associated with the indication / notification; or a RNTI associated with the first grant information)); and / or, based on certain information (e.g., a UE identity) carried by the first physical channel. Furthermore, in the description of the example embodiments of the present disclosure, “whether the second physical channel is triggered to be received” or similar expressions can be replaced by “whether the second physical channel is triggered to be received on (e.g., allocated) physical resources” or similar expressions.

[0104] By this method, the second grant information for a UE can be indicated whether it is transmitted or not by the first grant information with a lower payload, and all or most of the scheduling grant information for the UE can be indicated by the second grant information. In this way, the second grant information can not be transmitted by a search space based PDCCH, i.e., no periodic search space physical resources need to be reserved. Meanwhile, since the first grant information has a smaller payload, its physical resource overhead can be greatly reduced. Therefore, this scheme can effectively reduce the resource overhead required for transmitting the scheduling grant information.

[0105] In some embodiments, the first physical channel can be a sequence based physical channel configured for reception by the at least one UE. In this case, the physical channel can be a physical channel that transmits only a sequence which is listened to (e.g., blindly detected) by the at least one UE based on the same physical resources configured. In some examples, the sequence can be a sequence (e.g., a pseudo-random (PN) sequence, a Zadoff-Chu (ZC) sequence, etc.) generated (e.g., calculated) according to a predefined method (e.g., a predefined formula), or the sequence can be a sequence including at least one complex value signal (e.g., looked up in a predefined table). In some examples, the physical resources can be configured by user-specific / user group-specific / cell-specific higher layer signaling (e.g., RRC signaling, etc.) or MAC CE, etc. configured to the at least one UE. For example, the at least one UE can be configured with a physical resource configuration. The physical resource configuration can include periodic time domain resources (e.g., a time domain period configured to be listened to) for the at least one UE to listen to the same sequence based physical channel at a certain period to obtain the first grant information. The physical resource configuration can also include information related to the sequence, such as one or more of the following: a parameter of a base sequence from which the sequence is generated; or a sequence index in a predefined table indicating the sequence; or an orthogonal cover code of the base sequence; or a cyclic shift of the base sequence, etc.

[0106] In some examples, the first grant information contained in the sequence-based physical channel can be indication information triggering the at least one UE to receive the second grant information. For example, the at least one UE can be configured with a common sequence (the common sequence can mean that the sequence is common to the at least one UE, i.e., the sequence received by the at least one UE is the same), and the UE can determine whether to be triggered to receive the second grant information according to the detection result of the common sequence. Only when the UE detects the common sequence (e.g., the received signal energy is higher than a threshold when performing sequence blind detection), the UE is triggered to receive the second grant information. In this way, the physical resources required are the smallest, and the time-frequency resources required for sending the first grant information can be reduced to the greatest extent. In other examples, the first grant information contained in the sequence-based physical channel can be indication information triggering part of the at least one UE to receive the second grant information. For example, the at least one UE can be configured with a UE-specific sequence (the specific sequence can mean that the sequence is specific to one or more of the at least one UE, e.g., at least two of the at least one UE are configured to receive different sequences), and the UE can determine whether to be triggered to receive the second grant information according to the detection result of the specific sequence. For example, the configuration method of the UE-specific sequence can be that at least two of the at least one UE are configured with different sequences or different sequence parameters, such as being configured with different (indexed) cyclic shift values based on the same base sequence, or being configured with different (indexed) time domain and / or frequency domain orthogonal cover codes based on the same base sequence. Further, the UE can determine the related parameters of the UE-specific sequence according to its own identity information (also known as UE identity or UE identity information) (in the example embodiments of the present disclosure, unless otherwise indicated, the UE identity can include at least one of the following: cell RNTI (C-RNTI), modulation and coding scheme-cell RNTI (MCS-C-RNTI), configured scheduling RNTI (CS-RNTI), configured grant-small data transmission-configured scheduling RNTI (CG-SDT-CS-RNTI), and other RNTIs used for unicast or multicast transmission of the UE, etc.). For example, the UE can determine the UE-specific sequence-related parameters according to the UE identity information; for example, different UEs can determine different cyclic shifts based on the same base sequence according to their own identity information. For example, the UE can determine the UE-specific sequence-related parameters through the following equation, i = mod(N ID ,C), where i is the cyclic shift index, N IDUE identity information, and C is a maximum cyclic shift number fixed by a protocol or configured. In this way, the indication content of the first grant information can be increased, only part of the UEs are triggered to receive the second grant information according to needs, the first grant information is improved in pertinence, the UEs which are not actually scheduled to transmit are avoided to receive the second grant information, and the energy consumption of the UEs is saved.

[0107] In some embodiments, the first physical channel can be a PDCCH configured for reception by at least one UE. In this case, based on the configured at least one common search space and / or a specific RNTI (e.g., an RNTI associated with the first grant information / first physical channel; for example, the RNTI is used to indicate / inform whether the UE is triggered to receive the second physical channel or is associated with the indication / information), the UE (e.g., each of the at least one UE) can monitor PDCCH candidates to obtain information indicating whether the UE is triggered to receive the second physical channel. A downlink control information format (e.g., the downlink control information format can include the first grant information). For example, when the UE detects a PDCCH scrambled with the specific RNTI (e.g., an RNTI associated with the first grant information / first physical channel), the UE can determine that it is triggered to receive the second physical channel. Additionally or alternatively, when the UE successfully detects a PDCCH scrambled with the specific RNTI (e.g., an RNTI associated with the first grant information / first physical channel), the UE can further determine whether it is triggered to receive the second physical channel based on information carried by the PDCCH. In some examples, the specific RNTI (e.g., an RNTI associated with the first grant information / first physical channel) can be a set of UE-specific or cell-specific RNTIs configured for the first grant information / first physical channel transmission (i.e., multiple UEs are configured with the same RNTI), which is used to monitor PDCCH on the common search space. The downlink control information format can be used to indicate the first grant information to a set of UEs. In this way, multiple UEs can be configured with the same search space for receiving the first grant information, thereby reducing the physical resources that need to be reserved by the network side for the PDCCH search space. In addition, the specific RNTI (e.g., an RNTI associated with the first grant information / first physical channel) can be a newly defined RNTI or an existing RNTI can be reused as the specific RNTI.

[0108] In some embodiments, the first physical channel can carry the first grant information, and the first physical channel is a PDCCH configured for reception by at least one UE. In this case, the first grant information included in the downlink control information format carried by the PDCCH includes indication information for determining whether the UE is triggered to receive the second grant information. Examples of the downlink control information format including indication information of whether the UE is triggered to receive the second grant information are described below.

[0109] In some examples, the indication information can be used to trigger at least one UE whether to receive the second grant information. For example, N bits (N > 1 and N is a positive integer) of indication information can be used to indicate whether at least one of the UEs associated with the same first grant information is triggered to receive the second grant information (the UEs associated with the same first grant information can refer to at least one UE configured to receive the same common search space for receiving the PDCCH carrying the first grant information (such as configured with the same RNTI associated with the first grant information, and the same common search space)). N can be 1, i.e. 1 bit of indication information is used to indicate whether all the UEs associated with the first grant information are triggered to receive the second grant information; or N > 1, then the indication information containing a sequence (e.g. bitmap) of N bits can be denoted as x0, x1, x2,..., xN-1, where the i-th bit x N-1 , i = 0, 1, 2,..., N-1, where the i-th bit x i-1 is used to indicate whether at least one UE in the i-th UE subgroup associated with the first grant information is triggered to receive the second grant information. For example, the UE subgroup can represent a set of UEs indicated by the same information bit in the first grant information whether to be triggered to receive the second grant information. Each UE associated with the first grant information can determine its belonging UE subgroup as at least one of the N UE subgroups. For example, the UE can determine the index / number of its UE subgroup through high layer signaling (such as RRC signaling, MAC CE, etc.), or according to its identity information. As a specific example, the index of the subgroup to which the UE belongs can be determined by the following formula i = mod(N ID , N)-1, where N ID is the UE identity information of the UE, and N is the number of UE subgroups fixed by the protocol or configured.

[0110] In some examples, the first grant information contained in the downlink control information format can contain the identity information of the UE triggered to receive the second grant information or the association information associated with the identity information. The identity information of the UE or the association information associated with the identity information can be regarded as indication information indicating whether the UE is triggered to receive the second grant information, for example, used to implicitly indicate whether the UE is triggered to receive the second grant information. For example, the association information associated with the UE identity can be calculated by the following formula mod(N ID , Δ), where N IDFor the RNTI used for the UE unicast or multicast transmission, Δ is a protocol fixed value or a configured value, and the value of Δ can determine the upper limit of the number of UEs that can be authorized by the first grant information obtained based on the common search space. The UE can determine whether the identity information (or its associated information) indicated in the first grant information is consistent (e.g., matches or is the same) with the identity information (or its associated information) of the UE itself. When the identity information (or its associated information) indicated in the first grant information is consistent with the identity information (or its associated information) of the UE itself, the UE is triggered to receive the second grant information. Additionally or alternatively, when the identity information (or its associated information) indicated in the first grant information is inconsistent with the identity information (or its associated information) of the UE itself, the UE does not receive the second grant information.

[0111] In some embodiments, when the first physical channel used to determine the first grant information (e.g., carrying the first grant information) is a PDCCH (e.g., the “PDCCH configured for reception by at least one UE” described in the above embodiments), the first grant information carried by the PDCCH can also include time domain resource allocation information and / or frequency domain resource allocation information of a downlink physical channel (which can be referred to as a second physical channel in embodiments of the present disclosure) carrying the second grant information. The UE can determine whether to be triggered to receive the second grant information according to at least one of the time domain resource allocation information and the frequency domain resource allocation information, for example, when the physical resource determined by the UE according to the time domain resource allocation information and / or the frequency domain resource allocation information (i.e., the allocated physical resource, including the allocated time domain resource and / or the frequency domain resource) is a valid physical resource (e.g., the allocated time domain resource and the frequency domain resource meet the minimum physical resource requirement for transmission of the second grant information; and / or the allocated time domain resource and / or the frequency domain resource is not used by a higher priority transmission; and / or the allocated time domain resource and / or the frequency domain resource can be used for downlink transmission / FWA downlink transmission), the UE is triggered to receive the second grant information. Additionally or alternatively, when the physical resource determined by the UE according to the time domain resource allocation information and / or the frequency domain resource allocation information is not a valid physical resource, the UE does not receive the second grant information.

[0112] In some embodiments, when the UE is triggered to receive the second grant information based on the first grant information, the UE can receive a downlink physical channel carrying the second grant information. For example, the downlink physical channel can be at least one of: a downlink shared channel (e.g., PDSCH), a grant-based downlink control channel (e.g., PDCCH). The downlink shared channel can be a same downlink shared channel received by at least one UE (e.g., when the first grant information triggers the at least one UE to receive a same second grant information, and the same second grant information is carried by one downlink shared channel, which can be scrambled by an RNTI associated with the first grant information). The grant-based downlink control channel can refer to that the UE receives downlink control information on an indicated time domain and frequency domain resource, where the downlink control information contains at least the second grant information. Specifically, the UE can obtain the time domain and / or frequency domain resource of the downlink physical channel carrying the second grant information according to the first grant information and / or higher layer signaling (e.g., RRC signaling, MAC CE, etc.). For example, the first grant information and / or higher layer signaling can include indication information related to the time domain and / or frequency domain resource of the downlink physical channel, which can include at least one of: an index of a time domain resource location (e.g., index of a slot / subframe / time domain symbol, etc.) used by the downlink physical channel for transmission; an index of a frequency domain resource location (e.g., index of a bandwidth part (BWP) / FWA frequency subband / physical resource block group (RBG) / physical resource block (PRB), etc.) used by the downlink physical channel for transmission. When the downlink physical channel is a grant-based downlink control channel, the time domain and / or frequency domain resource of the downlink physical channel can be time domain aperiodic, and / or can not be limited to a control channel resource set (CORESET) configuration. Or, there is an association between a first physical resource (including time domain and / or frequency domain resource) of a first physical channel carrying the first grant information and a second physical resource (including time domain and / or frequency domain resource) of a downlink physical channel carrying the second grant information. The UE can determine the time domain and / or frequency domain resource of the downlink physical channel carrying the second grant information according to the association. For example, the association includes at least one of: the time domain resource location (e.g., index of a slot / subframe / time domain symbol, etc.) of the first physical resource is the same as or has a determined time domain offset Δ T (Δ T from the time domain resource location of the second physical resource, which can be a protocol fixed value or configured to the UE by signaling; the frequency domain resource location (e.g., index of a BWP / FWA frequency subband / RBG / PRB, etc.) of the first physical resource is the same as or has a determined frequency domain offset Δ F (Δ F from the frequency domain resource location of the second physical resource, which can be a protocol fixed value or configured to the UE by signaling.

[0113] In some embodiments, when the first grant information triggers multiple UEs to receive the second grant information, the physical resources (e.g., at least one of time domain resource and frequency domain resource) configured for the multiple UEs to receive the second grant information are different from each other. In this case, the multiple UEs respectively receive the downlink physical channels scrambled by respective UE-specific identification information (e.g., C-RNTI, etc.) on different physical resources, where each of the downlink physical channels carries the second grant information for a single UE. In this case, the UE does not need to further confirm whether it is actually scheduled, i.e., the UE determines that it is triggered to receive the second grant information according to the indication of the first grant information, which means that it is scheduled to transmit an uplink signal or a downlink signal. This method can simplify the procedure after the UE receives the second grant information, and avoid the UE receiving the second grant information that is not for itself.

[0114] In some embodiments, when the first grant information triggers multiple UEs to receive the second grant information, the multiple UEs are configured with the same physical resources (e.g., time domain resources and frequency domain resources) for receiving the second grant information. In this case, the multiple UEs receive the same downlink physical channel carrying the second grant information, wherein the second grant information can contain scheduling grant information for a unique UE among the multiple UEs. In some examples, the downlink physical channel carrying the second grant information can be scrambled by identity information of the unique UE, i.e., only the unique UE among the multiple UEs can correctly detect the downlink physical channel and obtain the second grant information. The UE that can detect the downlink physical channel can determine that it is scheduled. In other examples, the downlink physical channel carrying the second grant information is scrambled by identity information common to the multiple UEs (e.g., RNTI associated with the first grant information, etc.), and the second grant information contains identity information of a specific UE (which can be one or more of the multiple UEs). Upon receiving the downlink physical channel, a UE (e.g., each of the multiple UEs) can determine whether the second grant information is valid, i.e., whether the UE is scheduled, based on the identity information contained in the second grant information. When the identity information contained in the second grant information received by the UE matches (e.g., matches or is identical to) the identity of the UE, it is determined that the second grant information is valid for the UE. Additionally or alternatively, when the identity information contained in the second grant information received by the UE does not match the identity of the UE, it can be determined that the second grant information is not valid for the UE. In some scenarios, the probability of concurrent traffic of multiple UEs is small, and the UE that is actually scheduled at the same time can be only one of the multiple UEs. In this case, the first grant information and the second grant information are both designed as common information received by the multiple UEs, thereby significantly reducing the resource overhead of scheduling grant information, while supporting scheduling grant for multiple UEs. In the description of the exemplary embodiments of the present disclosure, “scheduling grant information” can refer to information related to the authorization / scheduling of transmission and / or reception of a signal (e.g., uplink signal and / or downlink signal), and the two can be used interchangeably. For example, a UE can perform uplink transmission or downlink reception based on the obtained scheduling grant information. In some examples, the scheduling grant information can include at least one of: information related to downlink allocation, information related to uplink scheduling grant, information related to physical uplink shared channel configuration grant (e.g., activation, deactivation, downlink feedback information indication, etc.), information related to physical downlink shared channel semi-persistent transmission (e.g., activation, deactivation, etc.), information related to transmission power control configuration parameters (e.g., transmission power control command for physical uplink shared channel and / or physical uplink control channel transmission), etc.

[0115] Figure 5A flow chart of a method performed by a UE according to some example embodiments of the present disclosure is shown. For example, the method includes the procedure of performing uplink or downlink transmission based on the first grant information and / or the second grant information, in combination with the example method of the first grant information transmission in the foregoing embodiments. Specifically, the UE can receive a common physical channel (e.g., a “sequence-based physical channel” or PDCCH) to obtain the first grant information, can receive the second grant information according to the first grant information, and then perform uplink or downlink transmission according to the second grant information. In combination with the foregoing embodiments, the method can include the procedure of receiving the second grant information according to the first grant information, and then performing uplink or downlink transmission according to the second grant information, in combination with the example method of the second grant information transmission in the foregoing embodiments. Figure 5 The described methods are merely examples. One or more of the operations shown in the flow charts of FIGS. 10-12 can be omitted, and / or additional operations that are not depicted can be included. Figure 5 The described methods are merely examples. One or more of the operations shown in the flow charts of FIGS. 10-12 can be omitted, and / or additional operations that are not depicted can be included.

[0116] Reference is made to FIG. 10, which shows a flow chart of a method performed by a UE according to some example embodiments of the present disclosure. For example, the method includes the procedure of receiving a first physical channel (e.g., a common physical channel) to obtain first grant information, in combination with the example method of the first grant information transmission in the foregoing embodiments. Figure 5 At operation S510, the UE receives a first physical channel (e.g., a common physical channel) to obtain first grant information. For example, the first physical channel can be a sequence-based physical channel, or a PDCCH.

[0117] Next, at operation S520, based on the first grant information, the UE determines whether to be triggered to receive the second grant information. If the first grant information does not trigger the UE to receive the second grant information, the UE returns to operation S510, and the UE continues to monitor the first physical channel.

[0118] Then, if the first grant information triggers the UE to receive the second grant information, at operation S540, the UE transmits an uplink signal or receives a downlink signal according to scheduling information related to the uplink or downlink signal transmission in the second grant information. Alternatively, if the first grant information triggers the UE to receive the second grant information, the UE can further determine whether to be scheduled at operation S530 according to the indication in the second grant information (the specific method can refer to the corresponding examples described above for “the first grant information triggers multiple UEs to receive the second grant information”). If the UE determines to be scheduled, at operation S540, the UE transmits an uplink signal or receives a downlink signal according to scheduling information related to the uplink or downlink signal transmission in the second grant information. If the UE determines not to be scheduled, the UE returns to operation S510 to continue to monitor the first physical channel carrying the first grant information.

[0119] In some embodiments, the first grant information can contain other indication information related to the second grant information or the second physical channel carrying the second grant information, in addition to the relevant information for determining whether to be triggered to receive the second grant information. For example, the indication information related to the second grant information or the second physical channel carrying the second grant information can include at least one of the following: a downlink control information format of the second grant information (when the downlink physical channel is a grant-based PDCCH), a modulation and / or coding scheme of the second physical channel, a payload bit number of the second grant information, a time offset between a time domain resource of the second grant information and a time domain resource of an uplink transmission and / or a downlink transmission scheduled by the second grant information. In some other examples, when one or more of the above-mentioned other indication information related to the second grant information or the second physical channel carrying the second grant information is not indicated in the first grant information, it can be configured to the UE by higher layer signaling or fixed by protocol.

[0120] In some embodiments, when the first physical channel used for determining the first grant information (e.g., carrying the first grant information) is a PDCCH (e.g., the “PDCCH configured for reception by at least one UE” in the above embodiments), the first grant information can further include scheduling grant information related to “UE transmitting uplink signals or receiving downlink signals” in addition to the information used for determining whether to be triggered to receive the second grant information. To reduce the resource overhead of the first grant information transmission, when the first grant information includes scheduling grant information (in embodiments of the present disclosure, it can also be referred to as transmission scheduling information) of the uplink signals or the downlink signals, the included transmission scheduling information can be scheduling information that only supports basic data transmission (e.g., lightweight, small data volume, etc.). For example, the transmission scheduling information can include at least one of the following: uplink / downlink identifier, frequency domain resource allocation, time domain resource allocation, modulation and coding scheme, frequency hopping identifier, redundancy version, HARQ process number, new data indication, power control command, downlink assignment index, uplink control channel related parameters, etc. In other examples, when the UE is triggered to receive the second grant information, and both the first grant information and the second grant information include scheduling grant information related to “UE transmitting uplink signals or receiving downlink signals” (the first grant information includes first transmission scheduling information and the second grant information includes second transmission scheduling information), the first transmission scheduling information is different from the second transmission scheduling information. The UE can transmit uplink signals or receive downlink signals according to the first transmission scheduling information and the second transmission scheduling information. In this case, the second transmission scheduling information can be a supplement to the first transmission scheduling information, and the first transmission scheduling information and the second transmission scheduling information are both used as scheduling / grant for uplink transmission or downlink reception. As a specific example, the content of the first transmission scheduling information can be as shown in the previous example; the second transmission scheduling information can further include, for example, BWP indication (e.g., for BWP switching), carrier indication (e.g., for carrier aggregation), antenna port indication (e.g., for multi-port transmission), code block group related indication (e.g., for code block group based retransmission), precoding related indication (e.g., for uplink digital precoding), phase tracking reference signal related indication, update / offset of the uplink resource allocation and / or downlink resource allocation indicated in the first transmission scheduling information (e.g., for supporting more diversified physical resource allocation, etc.), etc. This design can support fallback transmission of uplink signals and downlink signals, i.e., without transmitting the second grant information, the UE can be scheduled for basic uplink or downlink transmission based on the first grant information only. Or, this process can also be understood as that the uplink physical channel or the downlink physical channel indicated by the first grant information only carries data information, and does not carry scheduling grant information related to subsequent physical channel transmission. This design can provide flexibility for network scheduling, when the UE only needs basic data transmission, it does not need to receive the second grant information, which can reduce the scheduling delay at this time.Figure 6 A flowchart of a method performed by a UE according to an example embodiment of the present disclosure is shown. The method is described in conjunction with Figure 6 The described method is merely an example. One or more of the operations shown in the method can be omitted, or additional operations described according to various embodiments of the present disclosure can be added. Figure 6 The described method is merely an example. One or more of the operations shown in the method can be omitted, or additional operations described according to various embodiments of the present disclosure can be added.

[0121] Reference is made to Figure 6 At operation S610, the UE receives a first physical channel (e.g., a common physical channel) and obtains first grant information. For example, the first physical channel can be a PDCCH.

[0122] Next, at operation S620, based on the first grant information, the UE determines whether it is triggered to receive second grant information. If the first grant information does not trigger the UE to receive the second grant information, at operation S640, the UE transmits an uplink signal or receives a downlink signal according to scheduling information related to the uplink signal or downlink signal transmission in the first grant information.

[0123] Then, if the first grant information triggers the UE to receive the second grant information, at operation S650, the UE transmits an uplink signal or receives a downlink signal according to scheduling information related to the uplink signal or downlink signal transmission in the first grant information and the second grant information. Alternatively, if the first grant information triggers the UE to receive the second grant information, the UE can further determine whether it is scheduled at operation S630 according to an indication in the second grant information (the specific method can refer to the corresponding example for "the first grant information triggers multiple UEs to receive the second grant information"). If the UE determines that it is scheduled, it transmits an uplink signal or receives a downlink signal according to scheduling information related to the uplink signal or downlink signal transmission in the first grant information and the second grant information. If the UE determines that it is not scheduled, the UE returns to operation S610 and continues to monitor the common physical channel carrying the first grant information.

[0124] Figure 7 A flowchart of a method 700 performed by a UE according to some embodiments of the present disclosure is shown. For example, the UE can be implemented as a CPE type UE / CPE capable UE, or other types of UEs such as a normal UE.

[0125] Reference is made to Figure 7 At operation S710, the UE monitors a first physical channel.

[0126] Next, at operation S720, based on the first physical channel, the UE determines whether it is triggered to receive a second physical channel carrying first information related to a grant of uplink transmission or downlink reception of at least one UE including the UE.

[0127] Then, in operation S730, the UE transmits an uplink signal or receives a downlink signal based on at least one of the first physical channel or the second physical channel.

[0128] In some embodiments, one or more of operations S710 through S730 can be performed based on the methods described according to various embodiments of the disclosure.

[0129] In some embodiments, the method 700 can omit one or more of operations S710 through S730, or can include additional operations, e.g., operations that can be performed by a UE according to various embodiments of the disclosure.

[0130] Figure 8 A flowchart of a method 800 performed by a base station according to some embodiments of the disclosure is shown.

[0131] Reference Figure 8 In operation S810, the base station transmits a first physical channel to a UE.

[0132] Next, in operation S820, the base station receives an uplink signal from the UE or transmits a downlink signal to the UE based on at least one of the first physical channel or the second physical channel. Whether the UE is triggered to receive the second physical channel is determined based on the first physical channel, the second physical channel carrying first information related to a grant of uplink transmission or downlink reception of at least one UE including the UE.

[0133] In some embodiments, one or more of S810 through S820 can be performed based on the methods described according to various embodiments of the disclosure.

[0134] In some embodiments, the method 800 can omit one or more of operations S810 through S820, or can include additional operations, e.g., operations that can be performed by a base station according to various embodiments of the disclosure.

[0135] Those skilled in the art will understand that the illustrative embodiments described above are described herein and are not intended to be limiting. It should be understood that any two or more of the embodiments disclosed herein can be combined in any combination. Additionally, other embodiments can be utilized and other changes can be made without departing from the spirit and scope of the subject matter presented herein. It will be readily understood to those skilled in the art that the various aspects of the present disclosure, as generally described herein, and illustrated in the Figures, can be arranged, substituted, combined, separated, and designed in various different configurations, all of which are contemplated herein.

[0136] Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and steps described in connection with the disclosure can be implemented as hardware, software, or combinations thereof. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans can implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.

[0137] The various illustrative logical blocks, modules, and circuits described in connection with the disclosure can be implemented or performed with a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor can be a microprocessor, but in the alternative, the processor can be any conventional processor, controller, microcontroller, or state machine. A processor can also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0138] The steps of a method or algorithm described in connection with the disclosure can be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium can be integral to the processor. The processor and the storage medium can reside in an ASIC. The ASIC can reside in a communication device (e.g., a terminal or base station). In the alternative, the processor and the storage medium can reside as discrete components in a communication device (e.g., a terminal or base station).

[0139] In one or more exemplary designs, the functions described can be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions can be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media include both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media can be any available media that can be accessed by a general purpose or special purpose computer.

[0140] The above-described exemplary embodiments are merely illustrative for the present application and do not in any way limit the scope of the present application, which is defined by the appended claims.

Claims

1. A method performed by a user equipment (UE) in a communication system, comprising: Listen to the first physical channel; Based on the first physical channel, determine whether to trigger reception of a second physical channel, the second physical channel carrying first information related to the uplink transmission or downlink reception authorization of at least one UE, the at least one UE including the UE; and Based on at least one of the first physical channel or the second physical channel, an uplink signal is transmitted or a downlink signal is received.

2. The method according to claim 1, wherein, The first physical channel includes at least one of the following: physical downlink control channel (PDCCH); sequence-based physical channel.

3. The method according to claim 2, wherein, The sequence-based physical channel carries only the sequence and is monitored by the at least one UE on the same physical resources.

4. The method according to claim 3, in, The sequence is a common sequence configured for the at least one UE. Specifically, the determination of whether to trigger the reception of the second physical channel is based on the detection result of the public sequence.

5. The method according to claim 3, in, The sequence is a proprietary sequence configured for one or more of the at least one UE, including the UE itself. Specifically, the determination of whether to trigger the reception of the second physical channel is based on the detection result of the proprietary sequence.

6. The method according to claim 1, wherein, Monitoring the first physical channel includes: The first physical channel is monitored based on the first Radio Network Temporary Identifier (RNTI) associated with the first physical channel to determine whether to trigger the reception of the second physical channel.

7. The method according to claim 6, wherein, The RNTI associated with the first physical channel is a UE group-specific or cell-specific RNTI used for transmission on the first physical channel.

8. The method according to claim 2 or 6, wherein, The downlink control information carried by the first physical channel includes indication information, which is used to indicate whether the reception of the second physical channel has been triggered.

9. The method according to claim 8, wherein, The indication information is used to indicate whether one or more UEs are triggered to receive the second physical channel. The one or more UEs are associated with the same indication of whether they are triggered to receive a second physical channel.

10. The method according to claim 8, wherein, The indication information is used to indicate whether one or more UE subgroups are triggered to receive a second physical channel. Each UE subgroup includes at least one UE, and the at least one UE is associated with the same indication of whether it is triggered to receive a second physical channel.

11. The method according to claim 1 or 6, wherein, UE identification information is included in the downlink control information carried on the first physical channel. Specifically, the determination of whether to trigger the reception of the second physical channel is based on whether the UE identification information included in the downlink control information matches the UE identification information of the UE.

12. The method according to claim 1 or 2, in, The first physical channel carries information related to the time-domain resource allocation and / or frequency-domain resource allocation of the second physical channel. The physical resources allocated to the second physical channel are determined based on information related to the time-domain resource allocation and / or frequency-domain resource allocation of the second physical channel.

13. The method according to claim 12, wherein, A second physical channel is triggered to be received on the allocated physical resources based on at least one of the following: The allocated physical resources meet the minimum physical resource requirements for transmission through the second physical channel. The allocated physical resources were not used by transmissions with a higher priority than the second physical channel transmission; or The allocated physical resources can be used for downlink transmission or fixed wireless access (FWA) downlink transmission.

14. The method according to claim 1, further comprising receiving the second physical channel when the UE is triggered to receive the second physical channel.

15. The method according to claim 14, wherein, When multiple UEs are triggered by the first physical channel to receive the second physical channel, each of the multiple UEs receives the second physical channel scrambled with the UE's UE identification information on different physical resources.

16. The method of claim 14, wherein, When multiple UEs are triggered by the first physical channel to receive the second physical channel, the multiple UEs detect the same second physical channel carrying first information, wherein the second physical channel is scrambled with common identification information of the multiple UEs. The first information includes the UE identification information of a specific UE among the plurality of UEs. Specifically, based on the UE identification information of a specific UE included in the first information matching the UE identification information of the UE, it is determined that the UE is scheduled to send uplink signals or receive downlink signals.

17. The method of claim 14, wherein, In the event that multiple UEs are triggered by the first physical channel to receive the second physical channel, the multiple UEs detect the same second physical channel carrying the first information. The second physical channel is scrambled by the UE identification information of a single UE among the plurality of UEs.

18. A method performed by a base station in a communication system, comprising: Send the first physical channel to the user equipment (UE); as well as Based on at least one of a first physical channel or a second physical channel, receive uplink signals from the UE or send downlink signals to the UE. Whether the UE is triggered to receive the second physical channel is determined based on the first physical channel. The second physical channel carries first information related to the authorization of uplink transmission or downlink reception of at least one UE, and the at least one UE includes the UE.

19. A user equipment (UE) in a communication system, comprising: transceiver; and One or more processors, coupled to the transceiver, are configured to perform the method as described in any one of claims 1-17.

20. A base station in a communication system, comprising: transceiver; and One or more processors, coupled to the transceiver, are configured to perform the method as described in claim 18.

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