Method and device for beam management

Abstract

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The present disclosure provides a method and device for beam management. In an implementation, a method performed by a user equipment (UE) in a communication system is provided, comprising: receiving first configuration information from a network device, the first configuration information including configuration information related to first uplink reference signal and first information related to beam for transmitting the first uplink reference signal; transmitting first uplink reference signal including multiple signals and / or multiple sequences to the network device based on the first configuration information; receiving first feedback information from the network device, the first feedback information corresponding to the multiple signals and / or the multiple sequences; transmitting second uplink reference signal to the network device through information related to beam determined based on the first feedback information; receiving second feedback information from the network device, the second feedback information including information related to uplink transmission.

Description

METHOD AND DEVICE FOR BEAM MANAGEMENT

[0001] The present disclosure relates to the field of communication, and more specifically, to a method and device for beam management.

[0002] In order to meet the increasing demand for wireless data communication services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or pre-5G communication systems. Therefore, 5G or pre-5G communication systems are also called "Beyond 4G networks" or "Post-LTE systems".

[0003] In order to achieve a higher data rate, 5G communication systems are implemented in higher frequency (millimeter, mmWave) bands, e.g., 60 GHz bands. In order to reduce propagation loss of radio waves and increase a transmission distance, technologies such as beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antenna, analog beamforming and large-scale antenna are discussed in 5G communication systems.

[0004] In addition, in 5G communication systems, developments of system network improvement are underway based on advanced small cell, cloud radio access network (RAN), ultra-dense network, device-to-device (D2D) communication, wireless backhaul, mobile network, cooperative communication, coordinated multi-points (CoMP), reception-end interference cancellation, etc.

[0005] In 5G systems, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC) as advanced coding modulation (ACM), and filter bank multicarrier (FBMC), non-orthogonal multiple access (NOMA) and sparse code multiple access (SCMA) as advanced access technologies have been developed.

[0006] 5th generation (5G) mobile communication technologies define broad frequency bands such that high transmission rates and new services are possible, and can be implemented not only in “Sub 6GHz” bands such as 3.5GHz, but also in “Above 6GHz” bands referred to as mmWave including 28GHz and 39GHz. In addition, it has been considered to implement 6G mobile communication technologies (referred to as Beyond 5G systems) in terahertz bands (for example, 95GHz to 3THz bands) in order to accomplish transmission rates fifty times faster than 5G mobile communication technologies and ultra-low latencies one-tenth of 5G mobile communication technologies.

[0007] At the beginning of the development of 5G mobile communication technologies, in order to support services and to satisfy performance requirements in connection with enhanced Mobile BroadBand (eMBB), Ultra Reliable Low Latency Communications (URLLC), and massive Machine-Type Communications (mMTC), there has been ongoing standardization regarding beamforming and massive MIMO for mitigating radio-wave path loss and increasing radio-wave transmission distances in mmWave, supporting numerologies (for example, operating multiple subcarrier spacings) for efficiently utilizing mmWave resources and dynamic operation of slot formats, initial access technologies for supporting multi-beam transmission and broadbands, definition and operation of BWP (BandWidth Part), new channel coding methods such as a LDPC (Low Density Parity Check) code for large amount of data transmission and a polar code for highly reliable transmission of control information, L2 pre-processing, and network slicing for providing a dedicated network specialized to a specific service.

[0008] Currently, there are ongoing discussions regarding improvement and performance enhancement of initial 5G mobile communication technologies in view of services to be supported by 5G mobile communication technologies, and there has been physical layer standardization regarding technologies such as V2X (Vehicle-to-everything) for aiding driving determination by autonomous vehicles based on information regarding positions and states of vehicles transmitted by the vehicles and for enhancing user convenience, NR-U (New Radio Unlicensed) aimed at system operations conforming to various regulation-related requirements in unlicensed bands, NR UE Power Saving, Non-Terrestrial Network (NTN) which is UE-satellite direct communication for providing coverage in an area in which communication with terrestrial networks is unavailable, and positioning.

[0009] Moreover, there has been ongoing standardization in air interface architecture / protocol regarding technologies such as Industrial Internet of Things (IIoT) for supporting new services through interworking and convergence with other industries, IAB (Integrated Access and Backhaul) for providing a node for network service area expansion by supporting a wireless backhaul link and an access link in an integrated manner, mobility enhancement including conditional handover and DAPS (Dual Active Protocol Stack) handover, and two-step random access for simplifying random access procedures (2-step RACH for NR). There also has been ongoing standardization in system architecture / service regarding a 5G baseline architecture (for example, service based architecture or service based interface) for combining Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies, and Mobile Edge Computing (MEC) for receiving services based on UE positions.

[0010] As 5G mobile communication systems are commercialized, connected devices that have been exponentially increasing will be connected to communication networks, and it is accordingly expected that enhanced functions and performances of 5G mobile communication systems and integrated operations of connected devices will be necessary. To this end, new research is scheduled in connection with eXtended Reality (XR) for efficiently supporting AR (Augmented Reality), VR (Virtual Reality), MR (Mixed Reality) and the like, 5G performance improvement and complexity reduction by utilizing Artificial Intelligence (AI) and Machine Learning (ML), AI service support, metaverse service support, and drone communication.

[0011] Furthermore, such development of 5G mobile communication systems will serve as a basis for developing not only new waveforms for providing coverage in terahertz bands of 6G mobile communication technologies, multi-antenna transmission technologies such as Full Dimensional MIMO (FD-MIMO), array antennas and large-scale antennas, metamaterial-based lenses and antennas for improving coverage of terahertz band signals, high-dimensional space multiplexing technology using OAM (Orbital Angular Momentum), and RIS (Reconfigurable Intelligent Surface), but also full-duplex technology for increasing frequency efficiency of 6G mobile communication technologies and improving system networks, AI-based communication technology for implementing system optimization by utilizing satellites and AI (Artificial Intelligence) from the design stage and internalizing end-to-end AI support functions, and next-generation distributed computing technology for implementing services at levels of complexity exceeding the limit of UE operation capability by utilizing ultra-high-performance communication and computing resources.

[0012] The above information is presented as background information only to assist with an understanding of the disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with regard to the disclosure.

[0013] The present disclosure relates to the field of communication, and more specifically, to a method and device for beam management.

[0014] The technical objects to be achieved by various embodiments of the disclosure are not limited to the technical objects mentioned above, and other technical objects not mentioned may be considered by those skilled in the art from various embodiments of the disclosure to be described below.

[0015] According to an embodiment of the present disclosure, there is provided a method performed by a user equipment (UE) in a communication system, comprising:

[0016] receiving first configuration information from a network device, the first configuration information including configuration information related to first uplink reference signal and first information related to beam for transmitting the first uplink reference signal;

[0017] transmitting first uplink reference signal including multiple signals and / or multiple sequences to the network device based on the first configuration information;

[0018] receiving first feedback information from the network device, the first feedback information corresponding to the multiple signals and / or the multiple sequences;

[0019] transmitting second uplink reference signal to the network device through information related to beam determined based on the first feedback information;

[0020] receiving second feedback information from the network device, the second feedback information including information related to uplink transmission.

[0021] In an implementation, the first configuration information includes at least one of:

[0022] configuration information of the first uplink reference signal, transmission configuration information of the first uplink reference signal, and information indicating whether to enable a first beam mode.

[0023] In an implementation, the configuration information of the first uplink reference signal includes format configuration information associated with a format of the first uplink reference signal,

[0024] the format configuration information comprises configuration information related to at least one of the following formats:

[0025] a first format in which reference signal includes N2 sequences or N2 repetitions of a sequence in time domain;

[0026] a second format in which reference signal includes N2 signals or N2 repetitions of a signal in time domain;

[0027] a third format in which reference signal includes N2 sequences or N2 repetitions of a sequence in frequency domain;

[0028] a fourth format, in which reference signal includes N2+M2 sequences or N2+M2 repetitions of a sequence in time domain, and the first N2 sequences or repetitions are related to a number of receive beams of the network device and the remaining M2 sequences or repetitions are related to a number of transmit beams of the UE,

[0029] wherein, N2 and M2 are positive integers.

[0030] In an implementation, the N2 sequences or N2 repetitions of a sequence, N2 signals or N2 repetitions of a signal, or N2+M2 sequences or N2+M2 repetitions of a sequence are consecutive or adjacent in time domain or frequency domain, or

[0031] there is a gap between two adjacent sequences, signals, or repetitions among the N2 sequences or N2 repetitions of a sequence, N2 signals or N2 repetitions of a signal, or N2+M2 sequences or N2+M2 repetitions of a sequence in time domain or frequency domain.

[0032] In an implementation, the configuration information of the first uplink reference signal further includes resource configuration information of the first uplink reference signal and / or configuration information related to sequence of the first uplink reference signal.

[0033] In an implementation, the transmission configuration information of the first uplink reference signal includes at least one of: transmit power configuration information, and configuration information of transmit beam.

[0034] In an implementation, the configuration information of transmit beam includes:

[0035] coefficient information of multiple transmit beams to which the first beam mode relates; or

[0036] coefficient information of a first beam among the multiple transmit beams, wherein coefficients of other transmit beams among the multiple transmit beams are derived based on the coefficient information of the first beam.

[0037] In an implementation, the first transmit beam is a sum beam, and the other transmit beams are differential beams.

[0038] In an implementation, boresight angles of the other transmit beams are obtained based on a boresight angle of the first transmit beam and a first angle offset.

[0039] In an implementation, the transmit power configuration information includes at least one of:

[0040] transmit power information and / or path loss compensation factor of the first uplink reference signal;

[0041] information indicating that transmit power of the first uplink reference signal reuses initial transmit power of random access channel;

[0042] information indicating that transmit power of the multiple signals and / or multiple sequences is the same;

[0043] information indicating offset between transmit power of the multiple signals and / or multiple sequences.

[0044] In an implementation, the first feedback information includes at least one of:

[0045] second information related to a measurement result of the first uplink reference signal, the second information including information corresponding to the first beam mode;

[0046] configuration information of the second uplink reference signal.

[0047] In an implementation, the second information includes at least one of: a measured value of the first uplink reference signal, ratio of measured values of multiple signals and / or multiple sequences included in the first uplink reference signal, an angle deviation value, and information related to an expected beam.

[0048] In an implementation, the configuration information of the second uplink reference signal includes format configuration information associated with a format of the second uplink reference signal, or information indicating that the network device enables to receive through first beam mode,

[0049] the format configuration information indicates that a format of the second uplink reference signal is the same as a format of the first uplink reference signal, or

[0050] the format configuration information includes configuration information of at least one format among the first format, the second format, the third format, and the fourth format,

[0051] based on the information indicating that the network device enables to receive through first beam mode, the UE expects the second uplink reference signal to be in the fourth format.

[0052] In an implementation, the configuration information of the second uplink reference signal further includes at least one of:

[0053] resource configuration information of the second uplink reference signal, configuration information related to sequence of the second uplink reference signal, and transmit power configuration information of the second uplink reference signal.

[0054] In an implementation, the transmit power configuration information of the second uplink reference signal includes at least one of:

[0055] transmit power information and / or path loss compensation factor of the second uplink reference signal;

[0056] information indicating that transmit power of the second uplink reference signal reuses initial transmit power of random access channel or transmit power of the first uplink reference signal.

[0057] In an implementation, the receiving first feedback information from the network device comprises:

[0058] receiving the first feedback information through receiving DCI in PDCCH for the UE or the first beam mode; or

[0059] monitoring the first feedback information based on second configuration information for the UE or the first beam mode,

[0060] wherein the second configuration information includes at least one of:

[0061] CORESET configuration information or configuration index for the UE or the first beam mode;

[0062] search space (SS) configuration information or configuration index for the UE or the first beam mode;

[0063] RNTI for the UE or the first beam mode;

[0064] a DCI format for the UE or the first beam mode.

[0065] In an implementation, the information related to uplink transmission includes at least one of:

[0066] indication information related to transmit beam;

[0067] configuration information of uplink transmit power;

[0068] information related to timing advance.

[0069] In an implementation, the indication information related to transmit beam includes information indicating that the transmit beam of the second uplink reference signal is used for uplink transmission.

[0070] In an implementation, the configuration information of uplink transmit power includes at least one of:

[0071] transmit power information and / or path loss compensation factor;

[0072] information indicating the transmit power reuses transmit power of random access channel, the first uplink reference signal, or the second reference signal;

[0073] information indicating an offset value between the transmit power and transmit power of the first uplink reference signal or the second reference signal.

[0074] In an implementation, the information related to timing advance includes a timing advance value or a timing advance adjustment value.

[0075] In an implementation, it further comprises monitoring dedicated resource configured by the network device to receive uplink beam update indication information,

[0076] wherein, the dedicated resource includes: dedicated RNTI, a dedicated DCI format.

[0077] In an implementation, the uplink beam update indication information includes information indicating transmitting the first uplink reference signal.

[0078] In an implementation, the method further comprises:

[0079] receiving downlink reference signal from the network device to obtain a second measured value;

[0080] transmitting a beam update request to the network device if the second measured value satisfies a first condition,

[0081] wherein the first condition includes at least one of:

[0082] the second measured value is not greater than a first threshold value;

[0083] a number of times where the second measured value is not greater than the first threshold is not less than a second threshold;

[0084] a number of consecutive times where the second measured value is not greater than the first threshold value is not less than a third threshold value;

[0085] uplink transmit power obtained based on UE capability and the second measured value is not greater than a fourth threshold.

[0086] In an implementation, the beam update request includes a beam direction or a reference signal index recommended by the UE.

[0087] In an implementation, the beam update request is transmitted through PUCCH, MAC CE or higher layer signaling.

[0088] According to an embodiment of the present disclosure, there is provided a method performed by a network device in a communication system, comprising:

[0089] transmitting first configuration information to a user equipment (UE), the first configuration information includes configuration information related to first uplink reference signal and first information related to beam for transmitting the first uplink reference signal;

[0090] receiving first uplink reference signal comprising multiple signals and / or multiple sequences from the UE;

[0091] transmitting first feedback information to the UE, the first feedback information corresponding to the multiple signals and / or multiple sequences;

[0092] receiving second uplink reference signal from the UE;

[0093] transmitting second feedback information to the UE, the second feedback information including information related to uplink transmission.

[0094] In an implementation, the first configuration information comprises at least one of:

[0095] configuration information of the first uplink reference signal, transmission configuration information of the first uplink reference signal, and information indicating whether to enable a first beam mode.

[0096] the configuration information of the first uplink reference signal includes format configuration information associated with a format of the first uplink reference signal,

[0097] the format configuration information comprises configuration information related to at least one of the following formats:

[0098] a first format in which reference signal includes N2 sequences or N2 repetitions of a sequence in time domain;

[0099] a second format in which reference signal includes N2 signals or N2 repetitions of a signal in time domain;

[0100] a third format in which reference signal includes N2 sequences or N2 repetitions of a sequence in frequency domain;

[0101] a fourth format, in which reference signal includes N2+M2 sequences or N2+M2 repetitions of a sequence in time domain, and the first N2 sequences or repetitions are related to a number of receive beams of the network device and the remaining M2 sequences or repetitions are related to a number of transmit beams of the UE,

[0102] wherein, N2 and M2 are positive integers.

[0103] In an implementation, the N2 sequences or N2 repetitions of a sequence, N2 signals or N2 repetitions of a signal, or N2+M2 sequences or N2+M2 repetitions of a sequence are consecutive or adjacent in time domain or frequency domain, or

[0104] there is a gap between two adjacent sequences, signals, or repetitions among the N2 sequences or N2 repetitions of a sequence, N2 signals or N2 repetitions of a signal, or N2+M2 sequences or N2+M2 repetitions of a sequence in time domain or frequency domain.

[0105] In an implementation, the configuration information of the first uplink reference signal further includes resource configuration information of the first uplink reference signal and / or configuration information related to sequence of the first uplink reference signal.

[0106] In an implementation, the transmission configuration information of the first uplink reference signal includes at least one of: transmit power configuration information, and configuration information of transmit beam.

[0107] In an implementation, the configuration information of transmit beam includes:

[0108] coefficient information of multiple transmit beams to which the first beam mode relates; or

[0109] coefficient information of a first beam among the multiple transmit beams, wherein coefficients of other transmit beams among the multiple transmit beams are derived based on the coefficient information of the first beam.

[0110] In an implementation, the first transmit beam is a sum beam, and the other transmit beams are differential beams.

[0111] In an implementation, boresight angles of the other transmit beams are obtained based on a boresight angle of the first transmit beam and a first angle offset.

[0112] In an implementation, the transmit power configuration information includes at least one of:

[0113] transmit power information and / or path loss compensation factor of the first uplink reference signal;

[0114] information indicating that transmit power of the first uplink reference signal reuses initial transmit power of random access channel;

[0115] information indicating that transmit power of the multiple signals and / or multiple sequences is the same;

[0116] information indicating offset between transmit power of the multiple signals and / or multiple sequences.

[0117] In an implementation, the first feedback information includes at least one of:

[0118] second information related to a measurement result of the first uplink reference signal, the second information including information corresponding to the first beam mode;

[0119] configuration information of the second uplink reference signal.

[0120] In an implementation, the second information includes at least one of: a measured value of the first uplink reference signal, ratio of measured values of multiple signals and / or multiple sequences included in the first uplink reference signal, an angle deviation value, and information related to an expected beam.

[0121] In an implementation, the configuration information of the second uplink reference signal includes format configuration information associated with a format of the second uplink reference signal, or information indicating that the network device enables to receive through first beam mode,

[0122] the format configuration information indicates that a format of the second uplink reference signal is the same as a format of the first uplink reference signal, or

[0123] the format configuration information includes configuration information of at least one format among the first format, the second format, the third format, and the fourth format.

[0124] In an implementation, the configuration information of the second uplink reference signal further includes at least one of:

[0125] resource configuration information of the second uplink reference signal, configuration information related to sequence of the second uplink reference signal, and transmit power configuration information of the second uplink reference signal.

[0126] In an implementation, the transmit power configuration information of the second uplink reference signal includes at least one of:

[0127] transmit power information and / or path loss compensation factor of the second uplink reference signal;

[0128] information indicating that transmit power of the second uplink reference signal reuses initial transmit power of random access channel or transmit power of the first uplink reference signal.

[0129] In an implementation, the information related to uplink transmission includes at least one of:

[0130] indication information related to transmit beam;

[0131] configuration information of uplink transmit power;

[0132] information related to timing advance.

[0133] In an implementation, the indication information related to transmit beam includes information indicating that the transmit beam of the second uplink reference signal is used for uplink transmission.

[0134] In an implementation, the configuration information of uplink transmit power includes at least one of:

[0135] transmit power information and / or path loss compensation factor;

[0136] information indicating the transmit power reuses transmit power of random access channel, the first uplink reference signal, or the second reference signal;

[0137] information indicating an offset value between the transmit power and transmit power of the first uplink reference signal or the second reference signal.

[0138] In an implementation, the information related to timing advance includes a timing advance value or a timing advance adjustment value.

[0139] In an implementation, the method further comprises transmitting uplink beam update indication information to the UE through dedicated resource,

[0140] wherein, the dedicated resource includes: dedicated RNTI, a dedicated DCI format.

[0141] In an implementation, the uplink beam update indication information includes information indicating transmitting the first uplink reference signal.

[0142] In an implementation, the method further comprises:

[0143] transmitting downlink reference signal to the UE;

[0144] receiving a beam update request from the UE.

[0145] In an implementation, the beam update request includes a beam direction or a reference signal index recommended by the UE.

[0146] In an implementation, the beam update request is transmitted through PUCCH, MAC CE or higher layer signaling.

[0147] According to an embodiment of the present disclosure, there is provided a user equipment (UE), comprising:

[0148] a transceiver configured to transmit and / or receive signals;

[0149] a controller configured to control the UE to perform method(s) according to embodiment(s) of the present disclosure.

[0150] According to an embodiment of the present disclosure, there is provided a network device, comprising:

[0151] a transceiver configured to transmit and / or receive signals;

[0152] a controller configured to control the network device to perform method(s) according to embodiment(s) of the present disclosure.

[0153] The above-described various embodiments of the disclosure are merely some of the preferred embodiments of the disclosure, and various embodiments reflecting the technical features of the disclosure may be derived and understood by those skilled in the art based on the following detailed description of the disclosure.

[0154] The present disclosure relates to the field of communication, and more specifically, to a method and device for beam management.

[0155] The effects that can be achieved through the disclosure are not limited to the effects mentioned in the various embodiments, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

[0156] FIG.1 illustrates an example wireless network according to various embodiments of the present disclosure;

[0157] FIG. 2A illustrates an example wireless transmit path according to the present disclosure;

[0158] FIG. 2B illustrates an example wireless receive path according to the present disclosure;

[0159] FIG. 3A illustrates an example user equipment according to the present disclosure,

[0160] FIG. 3B illustrates an example base station according to the present disclosure;

[0161] FIG. 4 illustrates an example diagram of random access procedure;

[0162] FIG. 5 illustrates an example diagram of gURS signal format 1;

[0163] FIG. 6 illustrates an example diagram of gURS signal format 2;

[0164] FIG. 7 illustrates an example diagram of gURS signal format 3;

[0165] FIG. 8 illustrates an example diagram of gURS signal format 4; and

[0166] FIG. 9 illustrates an example structure diagram of a user equipment (UE) according to an embodiment of the present disclosure;

[0167] FIG.10 illustrates an example structural diagram of a base station according to an embodiment of the present disclosure.

[0168] The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of various embodiments of the present disclosure as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the various embodiments described herein can be made without departing from the scope and spirit of the present disclosure. In addition, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.

[0169] The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the present disclosure. Accordingly, it should be apparent to those skilled in the art that the following description of various embodiments of the present disclosure is provided for illustration purpose only and not for the purpose of limiting the present disclosure as defined by the appended claims and their equivalents.

[0170] It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to “a component surface” includes reference to one or more of such surfaces.

[0171] The term “include” or “may include” refers to the existence of a corresponding disclosed function, operation or component which can be used in various embodiments of the present disclosure and does not limit one or more additional functions, operations, or components. The terms such as “include” and / or “have” may be construed to denote a certain characteristic, number, step, operation, constituent element, component or a combination thereof, but may not be construed to exclude the existence of or a possibility of addition of one or more other characteristics, numbers, steps, operations, constituent elements, components or combinations thereof.

[0172] The term “or” used in various embodiments of the present disclosure includes any or all of combinations of listed words. For example, the expression “A or B” may include A, may include B, or may include both A and B.

[0173] Unless defined differently, all terms used herein, which include technical terminologies or scientific terminologies, have the same meaning as that understood by a person skilled in the art to which the present disclosure belongs. Such terms as those defined in a generally used dictionary are to be interpreted to have the meanings equal to the contextual meanings in the relevant field of art, and are not to be interpreted to have ideal or excessively formal meanings unless clearly defined in the present disclosure.

[0174] The various embodiments of the present disclosure can be applied to various communication systems, such as: global system for mobile communications (GSM) system, code division multiple access (CDMA) system, broadband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system Frequency division duplex (FDD) systems, time division duplex (TDD) systems, universal mobile telecommunications systems (UMTS), global interoperability for microwave access (WiMAX) communication systems, fifth generation (5G) systems or new wireless (NR) systems, etc. In addition, the various embodiments of the present disclosure can be applied to future oriented communication technologies.

[0175] FIG. 1 illustrates an example wireless network 100 according to various embodiments of the present disclosure. The embodiment of the wireless network 100 shown in FIG. 1 is for illustration only. Other embodiments of the wireless network 100 can be used without departing from the scope of the present disclosure.

[0176] The wireless network 100 includes a gNodeB (gNB) 101, a gNB 102, and a gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one Internet Protocol (IP) network 130, such as the Internet, a private IP network, or other data networks.

[0177] Depending on a type of the network, other well-known terms such as "base station" or "access point" can be used instead of "gNodeB" or "gNB". For convenience, the terms "gNodeB" and "gNB" are used in this patent document to refer to network infrastructure components that provide wireless access for remote terminals. And, depending on the type of the network, other well-known terms such as "mobile station", "user station", "remote terminal", "wireless terminal" or "user apparatus" can be used instead of "user equipment" or "UE". For convenience, the terms "user equipment" and "UE" are used in this patent document to refer to remote wireless devices that wirelessly access the gNB, no matter whether the UE is a mobile device (such as a mobile phone or a smart phone) or a fixed device (such as a desktop computer or a vending machine).

[0178] gNB 102 provides wireless broadband access to the network 130 for a first multiple User Equipments (UEs) within a coverage area 120 of gNB 102. The first multiple UEs include a UE 111, which may be located in a Small Business (SB); a UE 112, which may be located in an enterprise (E); a UE 113, which may be located in a WiFi Hotspot (HS); a UE 114, which may be located in a first residence (R); a UE 115, which may be located in a second residence (R); a UE 116, which may be a mobile device (M), such as a cellular phone, a wireless laptop computer, a wireless PDA, etc. GNB 103 provides wireless broadband access to network 130 for a second multiple UEs within a coverage area 125 of gNB 103. The second multiple UEs include a UE 115 and a UE 116. In some embodiments, one or more of gNBs 101-103 can communicate with each other and with UEs 111-116 using 5G, Long Term Evolution (LTE), LTE-A, WiMAX or other advanced wireless communication technologies.

[0179] The dashed lines show approximate ranges of the coverage areas 120 and 125, and the ranges are shown as approximate circles merely for illustration and explanation purposes. It should be clearly understood that the coverage areas associated with the gNBs, such as the coverage areas 120 and 125, may have other shapes, including irregular shapes, depending on configurations of the gNBs and changes in the radio environment associated with natural obstacles and man-made obstacles.

[0180] As will be described in more detail below, one or more of gNB 101, gNB 102, and gNB 103 include a 2D antenna array as described in embodiments of the present disclosure. In some embodiments, one or more of gNB 101, gNB 102, and gNB 103 support codebook designs and structures for systems with 2D antenna arrays.

[0181] Although FIG. 1 illustrates an example of the wireless network 100, various changes can be made to FIG. 1. The wireless network 100 can include any number of gNBs and any number of UEs in any suitable arrangement, for example. Furthermore, gNB 101 can directly communicate with any number of UEs and provide wireless broadband access to the network 130 for those UEs. Similarly, each gNB 102-103 can directly communicate with the network 130 and provide direct wireless broadband access to the network 130 for the UEs. In addition, gNB 101, 102 and / or 103 can provide access to other or additional external networks, such as external telephone networks or other types of data networks.

[0182] FIGs. 2a and 2b illustrate example wireless transmission and reception paths according to the present disclosure. In the following description, the transmission path 200 can be described as being implemented in a gNB, such as gNB 102, and the reception path 250 can be described as being implemented in a UE, such as UE 116. However, it should be understood that the reception path 250 can be implemented in a gNB and the transmission path 200 can be implemented in a UE. In some embodiments, the reception path 250 is configured to support codebook designs and structures for systems with 2D antenna arrays as described in embodiments of the present disclosure.

[0183] The transmission path 200 includes a channel coding and modulation block 205, a Serial-to-Parallel (S-to-P) block 210, a size N Inverse Fast Fourier Transform (IFFT) block 215, a Parallel-to-Serial (P-to-S) block 220, a cyclic prefix addition block 225, and an up-converter (UC) 230. The reception path 250 includes a down-converter (DC) 255, a cyclic prefix removal block 260, a Serial-to-Parallel (S-to-P) block 265, a size N Fast Fourier Transform (FFT) block 270, a Parallel-to-Serial (P-to-S) block 275, and a channel decoding and demodulation block 280.

[0184] In the transmission path 200, the channel coding and modulation block 205 receives a set of information bits, applies coding (such as Low Density Parity Check (LDPC) coding), and modulates the input bits (such as using Quadrature Phase Shift Keying (QPSK) or Quadrature Amplitude Modulation (QAM)) to generate a sequence of frequency-domain modulated symbols. The Serial-to-Parallel (S-to-P) block 210 converts (such as demultiplexes) serial modulated symbols into parallel data to generate N parallel symbol streams, where N is a size of the IFFT / FFT used in gNB 102 and UE 116. The size N IFFT block 215 performs IFFT operations on the N parallel symbol streams to generate a time-domain output signal. The Parallel-to-Serial block 220 converts (such as multiplexes) parallel time-domain output symbols from the Size N IFFT block 215 to generate a serial time-domain signal. The cyclic prefix addition block 225 inserts a cyclic prefix into the time-domain signal. The up-converter 230 modulates (such as up-converts) the output of the cyclic prefix addition block 225 to an RF frequency for transmission via a wireless channel. The signal can also be filtered at a baseband before switching to the RF frequency.

[0185] The RF signal transmitted from gNB 102 arrives at UE 116 after passing through the wireless channel, and operations in reverse to those at gNB 102 are performed at UE 116. The down-converter 255 down-converts the received signal to a baseband frequency, and the cyclic prefix removal block 260 removes the cyclic prefix to generate a serial time-domain baseband signal. The Serial-to-Parallel block 265 converts the time-domain baseband signal into a parallel time-domain signal. The Size N FFT block 270 performs an FFT algorithm to generate N parallel frequency-domain signals. The Parallel-to-Serial block 275 converts the parallel frequency-domain signal into a sequence of modulated data symbols. The channel decoding and demodulation block 280 demodulates and decodes the modulated symbols to recover the original input data stream.

[0186] Each of gNBs 101-103 may implement a transmission path 200 similar to that for transmitting to UEs 111-116 in the downlink, and may implement a reception path 250 similar to that for receiving from UEs 111-116 in the uplink. Similarly, each of UEs 111-116 may implement a transmission path 200 for transmitting to gNBs 101-103 in the uplink, and may implement a reception path 250 for receiving from gNBs 101-103 in the downlink.

[0187] Each of the components in FIGs. 2a and 2b can be implemented using only hardware, or using a combination of hardware and software / firmware. As a specific example, at least some of the components in FIGs. 2a and 2b may be implemented in software, while other components may be implemented in configurable hardware or a combination of software and configurable hardware. For example, the FFT block 270 and IFFT block 215 may be implemented as configurable software algorithms, in which the value of the size N may be modified according to the implementation.

[0188] Furthermore, although described as using FFT and IFFT, this is only illustrative and should not be interpreted as limiting the scope of the present disclosure. Other types of transforms can be used, such as Discrete Fourier transform (DFT) and Inverse Discrete Fourier Transform (IDFT) functions. It should be understood that for DFT and IDFT functions, the value of variable N may be any integer (such as 1, 2, 3, 4, etc.), while for FFT and IFFT functions, the value of variable N may be any integer which is a power of 2 (such as 1, 2, 4, 8, 16, etc.)

[0189] Although FIGs. 2a and 2b illustrate examples of wireless transmission and reception paths, various changes may be made to FIGs. 2a and 2b. For example, various components in FIGs. 2a and 2b can be combined, further subdivided or omitted, and additional components can be added according to specific requirements. Furthermore, FIGs. 2a and 2b are intended to illustrate examples of types of transmission and reception paths that can be used in a wireless network. Any other suitable architecture can be used to support wireless communication in a wireless network.

[0190] FIG. 3a illustrates an example UE 116 according to the present disclosure. The embodiment of UE 116 shown in FIG. 3a is for illustration only, and UEs 111-115 of FIG. 1 can have the same or similar configuration. However, a UE has various configurations, and FIG. 3a does not limit the scope of the present disclosure to any specific implementation of the UE.

[0191] UE 116 includes an antenna 305, a radio frequency (RF) transceiver 310, a transmission (TX) processing circuit 315, a microphone 320, and a reception (RX) processing circuit 325. UE 116 also includes a speaker 330, a processor / controller 340, an input / output (I / O) interface 345, an input device(s) 350, a display 355, and a memory 360. The memory 360 includes an operating system (OS) 361 and one or more applications 362.

[0192] The RF transceiver 310 receives an incoming RF signal transmitted by a gNB of the wireless network 100 from the antenna 305. The RF transceiver 310 down-converts the incoming RF signal to generate an intermediate frequency (IF) or baseband signal. The IF or baseband signal is transmitted to the RX processing circuit 325, where the RX processing circuit 325 generates a processed baseband signal by filtering, decoding and / or digitizing the baseband or IF signal. The RX processing circuit 325 transmits the processed baseband signal to speaker 330 (such as for voice data) or to processor / controller 340 for further processing (such as for web browsing data).

[0193] The TX processing circuit 315 receives analog or digital voice data from microphone 320 or other outgoing baseband data (such as network data, email or interactive video game data) from processor / controller 340. The TX processing circuit 315 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The RF transceiver 310 receives the outgoing processed baseband or IF signal from the TX processing circuit 315 and up-converts the baseband or IF signal into an RF signal transmitted via the antenna 305.

[0194] The processor / controller 340 can include one or more processors or other processing devices and execute an OS 361 stored in the memory 360 in order to control the overall operation of UE 116. For example, the processor / controller 340 can control the reception of forward channel signals and the transmission of backward channel signals through the RF transceiver 310, the RX processing circuit 325 and the TX processing circuit 315 according to well-known principles. In some embodiments, the processor / controller 340 includes at least one microprocessor or microcontroller.

[0195] The processor / controller 340 is also capable of executing other processes and programs residing in the memory 360, such as operations for channel quality measurement and reporting for systems with 2D antenna arrays as described in embodiments of the present disclosure. The processor / controller 340 can move data into or out of the memory 360 as required by an execution process. In some embodiments, the processor / controller 340 is configured to execute the application 362 based on the OS 361 or in response to signals received from the gNB or the operator. The processor / controller 340 is also coupled to an I / O interface 345, where the I / O interface 345 provides UE 116 with the ability to connect to other devices such as laptop computers and handheld computers. I / O interface 345 is a communication path between these accessories and the processor / controller 340.

[0196] The processor / controller 340 is also coupled to the input device(s) 350 and the display 355. An operator of UE 116 can input data into UE 116 using the input device(s) 350. The display 355 may be a liquid crystal display or other display capable of presenting text and / or at least limited graphics (such as from a website). The memory 360 is coupled to the processor / controller 340. A part of the memory 360 can include a random access memory (RAM), while another part of the memory 360 can include a flash memory or other read-only memory (ROM).

[0197] Although FIG. 3a illustrates an example of UE 116, various changes can be made to FIG. 3a. For example, various components in FIG. 3a can be combined, further subdivided or omitted, and additional components can be added according to specific requirements. As a specific example, the processor / controller 340 can be divided into a plurality of processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). Furthermore, although FIG. 3a illustrates that the UE 116 is configured as a mobile phone or a smart phone, UEs can be configured to operate as other types of mobile or fixed devices.

[0198] FIG. 3b illustrates an example gNB 102 according to the present disclosure. The embodiment of gNB 102 shown in FIG. 3b is for illustration only, and other gNBs of FIG. 1 can have the same or similar configuration. However, a gNB has various configurations, and FIG. 3b does not limit the scope of the present disclosure to any specific implementation of a gNB. It should be noted that gNB 101 and gNB 103 can include the same or similar structures as gNB 102.

[0199] As shown in FIG. 3b, gNB 102 includes multiple antennas 370a-370n, multiple RF transceivers 372a-372n, a transmission (TX) processing circuit 374, and a reception (RX) processing circuit 376. In certain embodiments, one or more of the multiple antennas 370a-370n include a 2D antenna array. gNB 102 also includes a controller / processor 378, a memory 380, and a backhaul or network interface 382.

[0200] RF transceivers 372a-372n receive an incoming RF signal from antennas 370a-370n, such as a signal transmitted by UEs or other gNBs. RF transceivers 372a-372n down-convert the incoming RF signal to generate an IF or baseband signal. The IF or baseband signal is transmitted to the RX processing circuit 376, where the RX processing circuit 376 generates a processed baseband signal by filtering, decoding and / or digitizing the baseband or IF signal. RX processing circuit 376 transmits the processed baseband signal to controller / processor 378 for further processing.

[0201] The TX processing circuit 374 receives analog or digital data (such as voice data, network data, email or interactive video game data) from the controller / processor 378. TX processing circuit 374 encodes, multiplexes and / or digitizes outgoing baseband data to generate a processed baseband or IF signal. RF transceivers 372a-372n receive the outgoing processed baseband or IF signal from TX processing circuit 374 and up-convert the baseband or IF signal into an RF signal transmitted via antennas 370a-370n.

[0202] The controller / processor 378 can include one or more processors or other processing devices that control the overall operation of gNB 102. For example, the controller / processor 378 can control the reception of forward channel signals and the transmission of backward channel signals through the RF transceivers 372a-372n, the RX processing circuit 376 and the TX processing circuit 374 according to well-known principles. The controller / processor 378 can also support additional functions, such as higher-level wireless communication functions. For example, the controller / processor 378 can perform a Blind Interference Sensing (BIS) process such as that performed through a BIS algorithm, and decode a received signal from which an interference signal is subtracted. A controller / processor 378 may support any of a variety of other functions in gNB 102. In some embodiments, the controller / processor 378 includes at least one microprocessor or microcontroller.

[0203] The controller / processor 378 is also capable of executing programs and other processes residing in the memory 380, such as a basic OS. The controller / processor 378 can also support channel quality measurement and reporting for systems with 2D antenna arrays as described in embodiments of the present disclosure. In some embodiments, the controller / processor 378 supports communication between entities such as web RTCs. The controller / processor 378 can move data into or out of the memory 380 as required by an execution process.

[0204] The controller / processor 378 is also coupled to the backhaul or network interface 382. The backhaul or network interface 382 allows gNB 102 to communicate with other devices or systems through a backhaul connection or through a network. The backhaul or network interface 382 can support communication over any suitable wired or wireless connection(s). For example, when gNB 102 is implemented as a part of a cellular communication system, such as a cellular communication system supporting 5G or new radio access technology or NR, LTE or LTE-A, the backhaul or network interface 382 can allow gNB 102 to communicate with other gNBs through wired or wireless backhaul connections. When gNB 102 is implemented as an access point, the backhaul or network interface 382 can allow gNB 102 to communicate with a larger network, such as the Internet, through a wired or wireless local area network or through a wired or wireless connection. The backhaul or network interface 382 includes any suitable structure that supports communication through a wired or wireless connection, such as an Ethernet or an RF transceiver.

[0205] The memory 380 is coupled to the controller / processor 378. A part of the memory 380 can include an RAM, while another part of the memory 380 can include a flash memory or other ROMs. In certain embodiments, multiple instructions, such as the BIS algorithm, are stored in the memory. The multiple instructions are configured to cause the controller / processor 378 to execute the BIS process and decode the received signal after subtracting at least one interference signal determined by the BIS algorithm.

[0206] As will be described in more detail below, the transmission and reception paths of gNB 102 (implemented using RF transceivers 372a-372n, TX processing circuit 374 and / or RX processing circuit 376) support aggregated communication with FDD cells and TDD cells.

[0207] Although FIG. 3b illustrates an example of gNB 102, various changes may be made to FIG. 3b. For example, gNB 102 can include any number of each component shown in FIG. 3a. As a specific example, the access point can include many backhaul or network interfaces 382, and the controller / processor 378 can support routing functions to route data between different network addresses. As another specific example, although shown as including a single instance of the TX processing circuit 374 and a single instance of the RX processing circuit 376, gNB 102 can include multiple instances of each (such as one for each RF transceiver).

[0208] The time domain unit (also called time unit) in this application may be: an OFDM symbol, an OFDM symbol group (consisting of multiple OFDM symbols), a slot, a slot group (consisting of multiple slots), a subframe, a subframe group (consisting of multiple subframes), a system frame, a system frame group (composed of multiple system frames); may also be in absolute time units, such as 1 millisecond, 1 second, etc.; the time unit may also be a combination of multiple granularities, such as K1 slots plus K2 OFDM symbols.

[0209] The frequency domain unit (also called frequency unit) in this application may be: a subcarrier, a subcarrier group (composed of multiple subcarriers), a resource block (resource block, RB), which may also be called a physical resource block (physical resource block, PRB), a resource block group (consisting of multiple RBs), a bandwidth part (BWP), a bandwidth part group (consisting of multiple BWPs), a frequency band / carrier, a frequency band group / carrier group; may also be in absolute frequency domain units, such as 1 Hz, 1 kHz, etc.; the frequency domain unit may also be a combination of multiple granularities, such as M1 PRBs plus M2 subcarriers.

[0210] The exemplary embodiments of the present disclosure are further described below in conjunction with the accompanying drawings.

[0211] The text and drawings are provided as examples only to aid the reader in understanding the present disclosure. They are not intended, nor should they be construed, to limit the scope of the disclosure in any way. Although certain embodiments and examples have been provided, it will be apparent to those skilled in the art, based upon this disclosure, that changes may be made to the embodiments and examples shown without departing from the scope of the disclosure.

[0212] Those skilled in the art will understand that, as used herein, the singular forms "a," "an," "the," and "said" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should be further understood that the term "include" used in the specification of this application refers to the presence of stated features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It will be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and / or" includes all or any units and all combinations of one or more of the associated listed items.

[0213] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless specifically defined herein.

[0214] It will be understood by those skilled in the art that "terminal", "terminal device", as used herein, includes both devices that are wireless signal receiver, which are provided with only wireless signal receiver without transmission capability, and devices that are receive and transmit hardware, which are provided with receive and transmit hardware capable of bidirectional communication over a bidirectional communication link. Such devices may include: cellular or other communication devices with single line displays or multi-line displays or cellular or other communication devices without multi-line displays; a PCS (Personal Communications Service), which may combine voice, data processing, facsimile and / or data communications capabilities; a PDA (Personal Digital Assistant) that may include a radio frequency receiver, a pager, Internet / intranet access, a web browser, a notepad, a calendar and / or a GPS (Global Positioning System) receiver; a conventional laptop and / or palmtop computer or other device that has and / or includes a conventional laptop and / or palmtop computer or other device that has a radio frequency receiver. "Terminal", "terminal device", as used herein, may be portable, transportable, installed in a vehicle (aeronautical, marine, and / or land), or adapted and / or configured to operate locally, and / or in a distributed fashion, at any other location in earth and / or space. "Terminal", "terminal device", as used herein, may also be a communication terminal, a web terminal, a music / video playing terminal, and may be, for example, a PDA, a MID (Mobile Internet Device), and / or a mobile phone with music / video playing function, and may also be a smart TV, a set-top box, or the like device.

[0215] The term "send" in the present disclosure may be used interchangeably with "transmit", "report", "inform", and the like without departing from the scope of the present disclosure.

[0216] The text and drawings are merely provided by way of example to aid the reader in understanding the present disclosure. They are not intended, nor should they be construed, to limit the scope of the present disclosure in any way. Although certain embodiments and examples have been provided, it will be apparent to those of skill in the art, based upon the disclosure herein, that changes can be made to the embodiments and examples shown without departing from the scope of the disclosure.

[0217] The transmission links of the wireless communication system mainly comprise downlink communication links by the 5G gNB to the user equipment (UE) and uplink communication links by the UE to the network.

[0218] Nodes for positioning measurements in a wireless communication system, such as current wireless communication systems, include a UE that initiates a positioning request message, a Location Management Function (LMF) for positioning of the UE and transmission of positioning assistance data, a gNB or Transmission-Reception Point (TRP) that broadcasts positioning assistance data and makes uplink positioning measurements, a UE for downlink positioning measurements. Furthermore, the method of the present disclosure may also be extended to apply in other communication systems, e.g. automotive communication (V2X), e.g. sidelink communication, in such case the transmission reception point or UE may be any device in V2X.

[0219] Transmissions in a wireless communication system include transmissions by a base station (gNB) to a user equipment (UE), referred to as downlink transmissions, corresponding slots referred to as downlink slots, and transmissions by a UE to a base station device, referred to as uplink transmissions, corresponding slots referred to as uplink slots.

[0220] In downlink communication of a wireless communication system, the system transmits synchronization signals and broadcast channels to users over a synchronization signal block (synchronization signal / PBCH block, SSB) with a periodicity, the periodicity is a synchronization signal block periodicity (SSB periodicity), otherwise known as a synchronization signal block burst periodicity (SSB burst periodicity). At the same time, the base station configures a physical random access channel configuration period (PRACH configuration period) in which a certain number of random access transmission occasions (also referred to as PRACH transmission occasions, ROs) are configured, the configured ROs being determined by a certain validity rule to obtain valid ROs; and it is satisfied that within an association period (a certain length of time) all SSBs can be mapped onto the corresponding valid ROs, in an SSB to RO mapping cycle, all SSBs within one SSB periodicity can be exactly mapped onto the required random access resources, there may be one or more mapping cycles within one association period. One SSB-to-RO association pattern period contains one or more association periods, and the SSB-to-RO mapping patterns in each association pattern period are the same.

[0221] In New Radio (NR) communication systems, before radio resource control is established, such as during the random access process, the performance of random access directly affects the user experience. In traditional wireless communication systems, such as LTE and LTE-Advanced, or in 5G or NR systems, the random access process is applied to multiple scenarios such as establishing initial link, cell handover, re-establishing uplink link, RRC connection reestablishment, etc., and is divided into contention-based random access and contention-free random access according to whether the user monopolizes the preamble sequence resources. Since in contention-based random access, each user selects a preamble sequence from the same preamble sequence resource when trying to establish an uplink link, multiple users may select the same preamble sequence and send it to the base station. Therefore, the contention resolution mechanism is an important research direction in random access. How to reduce the probability of collision and how to quickly resolve collision that have occurred are key metric that affect the performance of random access.

[0222] FIG. 4 illustrates a schematic diagram of a 4-step random access procedure. For example, the contention-based random access process is divided into four steps, as shown in FIG.4. In the first step, the user randomly selects a preamble sequence from the preamble sequence (also interchangeably referred to as "preamble" herein) resource pool and sends it to the base station. The base station performs correlation detection on the received signal, thereby identifying the preamble sequence sent by the user; in the second step, the base station sends to the user a random access response (RAR), including a random access preamble sequence identifier, a timing advance command determined based on the time delay estimation between the user and the base station, and a temporary cell-radio network temporary identifier (C-RNTI), and the time-frequency resources allocated for next uplink transmission of the user; the user shall search for the PDCCH carrying such feedback based on the RA-RNTI associated with the PRACH occasion where the random access preamble sequence is sent. The RA-RNTI associated with the PRACH occasion (RO) for sending the random access preamble sequence is calculated according to the following formula:

[0223] RA-RNTI = 1 + s_id + 14 × t_id + 14 × 80 × f_id + 14 × 80 × 8 × ul_carrier_id,

[0224] where s_id is the index of the first OFDM symbol of this PRACH occasion (0 < s_id < 14), t_id is the index of the first slot of this PRACH occasion in the system frame (0 < t_id < 80), where the subcarrier spacing used to determine t_id is based on the value of μ specified in TS 38.211, section 5.3. 2, for μ = {0, 1, 2, 3}, for μ = {5, 6}, t_id is the index of the 120 kHz slot containing the PRACH occasion in the system frame (0 < t_id < 80), f_id is the index of the PRACH occasion in the frequency domain (0 < f_id < 8), UL_carrier_id is the UL carrier used for random access preamble transmission (0 for normal uplink (NUL) carrier, 1 for SUL carrier).

[0225] In the third step, the user sends a third message (message 3, Msg3) to the base station based on the information in the RAR. Msg3 contains information such as user terminal identifier and RRC connection request and the like, where the user terminal identifier is unique to the user and is used to resolve contention; in the fourth step, the base station sends a contention resolution identifier to the user, including the identifier of the user terminal that wins in the contention resolution. After detecting its own identifier, the user upgrades the temporary C-RNTI to C-RNTI, sends an ACK signal to the base station, completing the random access procedure, and waits for the scheduling of the base station. Otherwise, the user will start a new random access procedure after a delay of time.

[0226] For the contention-free random access procedure, since the base station knows the user identifier, and may allocates a preamble sequence to the user. Therefore, when sending the preamble sequence, the user does not need to randomly select a sequence, but uses the allocated preamble sequence. After detecting the allocated preamble sequence, the base station will send a corresponding random access response, including timing advance and uplink resource allocation information. After receiving the random access response, the user considers that the uplink synchronization has been completed and waits for further scheduling of the base station. Therefore, the contention-free random access procedure only includes two steps: step 1 is to send the preamble sequence; step 2 is to send a random access response.

[0227] For example, the random access procedure is applicable to the following scenarios:

[0228] 1. Initial access in RRC_IDLE;

[0229] 2. Re-establish RRC connection;

[0230] 3. Cell handover;

[0231] 4. Downlink data arrives in RRC connected state and requests a random access procedure (when the uplink is asynchronous);

[0232] 5. Uplink data arrives in the RRC connected state and requests a random access procedure (when the uplink is asynchronous or no resources are allocated to the scheduling request in the PUCCH resources);

[0233] 6. Positioning.

[0234] When accessing the 5G wireless communication system, beamforming technology may be used, and the UE needs to find a (transmit and / or receive) beam that is operable to communicate with the base station. In the traditional method, the base station or UE needs to use a separate reference signal (such as CSI-RS or SRS) to send each possible beam, and then the reference signal is measured by the UE or base station to obtain the (transmit and / or receive) beam which is operable; however, the resource overhead and delay of this method are relatively large. Therefore, how to obtain accurate (transmit and / or receive) beams that is operable quickly and / or with less resource overhead is a problem that needs to be solved.

[0235] Aspects and principles of the present disclosure will be described in more detail below, with reference to the accompanying drawings and examples. It is to be understood that the following description is by way of example only, and that the terms or nouns used are by way of example only and are not intended to be limiting. In addition, in the description of the present disclosure, for convenience of description, when describing a general uplink reference signal or downlink reference signal, the number of reference signals, the number of sequences of the reference signal, the number of repetitions of the reference signal, or the number of repetitions of the sequence of the reference signal will be described as N, and N is described 3 as an example, and accordingly the number of associated beams used for transmission or reception is described as 3 as an example, however this is only exemplary. It may be understood that the principles and technical essence of the present disclosure can also be applied to the case where N is other values, and also to the case where the number of associated beams is other values. All of these, are within the scope of the present disclosure.

[0236] In addition, in the description of the present disclosure, "beam" may be replaced by "spatial filter", "quasi-co-located (QCL) antenna port", "QCLed time-frequency resource", "QCL source", "QCL assumption", "TCI state", "resource index", etc., "beam index" may be replaced by other resource indexes, such as "spatial filter coefficient", "quasi-co-located (QCL) antenna port number", " QCLed time-frequency resource index", "QCL source index", "QCL assumption index", "TCI state index", "resource index", etc.

[0237] In an embodiment of the present disclosure, a method and device for beam management will be introduced. In embodiments of the present disclosure, a first beam mode may be used for the transmission and / or reception of the reference signal, and the first beam mode uses multiple beams with association relationship to transmit and / or receive signal, thereby enabling beam management with less latency, lower overhead, or higher / more flexible granularity to obtain narrow beams for communication. In addition, it can also be used to perform the beam failure recovery procedure with lower overhead or faster. In an implementation, the first beam mode transmits multiple reference signals and / or multiple sequences of reference signal using multiple beams having association relationship. The multiple reference signals and / or multiple sequences of reference signal may be received using the same beam or using multiple beams with association relationship. In an implementation, the same beam may be used to transmit multiple reference signals and / or multiple sequences of reference signal, and for the reception of the multiple reference signals and / or multiple sequences of reference signal, multiple beams with association relationship may be used. Through the method provided by the embodiments of the present disclosure, by utilizing the association between multiple beams for transmitting multiple reference signals and / or multiple sequences of reference signal, based on the measurement results of the multiple reference signals and / or multiple sequences of reference signal, beam management may be performed quickly to obtain narrow beams for communication. In addition, in one implementation, the beam failure recovery procedure may also be performed more efficiently.

[0238] In an implementation, the first beam mode relates to differential beamforming (DBF), whereby the first beam mode relates to transmitting and / or receiving signals using a sum beam and at least one differential beam. By applying DBF to the signal transmission at the transmitting end and / or the signal reception at the receiving end, the base station and the UE may quickly determine the transmit direction and / or receive direction of the signal, which is beneficial to quickly determining the appropriate transmit beam and / or or receive beam. By using such method, the efficiency in beam management may be improved, delay overhead and energy consumption overhead may be saved (for example, reducing the number or frequency of operations such as transmitting and measuring, reporting, etc.), and the accuracy of the selected beam may be improved. Differential beamforming is used in the present disclosure to explain the solution, but this is only exemplary and is for the convenience of the inventor to fully describe his technical concepts and technical principles, rather than for the purpose of limiting the principles of the present disclosure only to beam management method using differential beamforming.

[0239] It may be understood that although most of the description of the present disclosure describes the beam management solution using DBF as an example of the first beam mode applied to the transmission and / or reception of signals, the principles disclosed in the present disclosure can equally applied to scenarios using other technical solutions as the first beam mode. For example, for a scenario in which a solution that has optimized beam codebook design as the first beam mode, the method of the present disclosure may also be applicable.

[0240] Two signal types may be used in the beam management of the present disclosure, the transmission and / or reception of a general downlink reference signal (gDRS), and / or the transmission and / or reception of a general uplink reference signal (gURS). In the present disclosure, CSI-RS is used as an example of a general downlink reference signal related to beam management for description of the solution, but this is only exemplary, and CSI-RS may also be replaced by other gDRS, such as SSB, PRS, etc. In the present disclosure, SRS is used as an example of a general uplink reference signal related to beam management to describe the solution, but this is only exemplary, and SRS may also be replaced by other gURS, such as PRACH, PUCCH, etc.

[0241] The method provided by the embodiment of the present disclosure can effectively perform uplink beam management (for example, which may also include potential beam failure recovery) operations, for example, including one or a combination of multiple operations of the following:

[0242] ●the UE transmits first gURS to the network device (such as a base station, etc.),where the specific operations include one or more of the following:

[0243] ■ the UE receives configuration information transmitted by the network device on transmitting the first gURS, where it includes one or more of:

[0244] ◆ the first beam mode enable indication (for example, DBF enable indication, DBF will be described below as a non-limiting example of the first beam mode hereafter), the UE receives indication information of whether DBF is enabled. For example, the UE can determine a mode to use DBF to transmit gURS according to the indication, that is, the UE determines that the base station expects to receive gURS to obtain the measured feedback value corresponding to DBF;

[0245] ◆ the resource configuration information of the first gURS, including at least one of:

[0246] □ a signal format of the first gURS, including one or more signal formats of:

[0247] - gURS signal format 1, in which there are Nu sequences within a gURS signal in the time domain (it may be Nu different sequences, or Nu repetitions of the same sequence). As shown in the example of FIG. 5, it is the diagram of the signal format when Nu = 3; optionally, a first beam, a second beam, and a third beam are used on the three sequences to transmit the corresponding sequences, respectively, where the first beam, the second beam, and the third beam are associated beams involved in the first beam mode. For example, when the first beam mode involves DBF, the first beam may be a sum beam, and the second and third beams may be differential beams;

[0248] ◇ In an implementation, the Nu sequences are continuous or adjacent in the time domain;

[0249] ◇ In an implementation, the Nu sequences have a first time gap in the time domain, and the first time gap may facilitate beam switching when the network device transmits the N sequences;

[0250] - gURS signal format 2, which consists of Nu gURS signals, which may be Nu repetitions of one gURS signal, or Nu different gURS signals. Optionally, each gURS signal may have multiple sequences as in FIG.5. As shown in the example of FIG. 6, it is a diagram of the signal format when Nu = 3; optionally, the first beam, the second beam, and the third beam are used on the three gURS signals respectively to transmit corresponding sequences;

[0251] ◇ In an implementation, the Nu gURS signals are continuous or adjacent in the time domain;

[0252] ◇ In an implementation, the Nu gURS signals have a first time gap in the time domain, and the first time gap may facilitate beam switching when the network device transmits the Nu gDRS signals;

[0253] - gURS signal format 3, in which there are Nu sequences within a gURS signal in the frequency domain (it may be Nu different sequences, or Nu repetitions of the same sequence). As shown in the example of FIG.7, it is the diagram of signal format when Nu = 3; optionally, the first beam, the second beam, and the third beam are used on the three sequences respectively to transmit the corresponding sequences;

[0254] ◇ In an implementation, the Nu sequences are continuous or adjacent in the frequency domain, or the Nu sequences may have frequency domain gap in the frequency domain;

[0255] - gURS signal format 4, in which there are N2+M2 sequences within a gURS signal in time domain (it may be N2+M2 different sequences, or N2+M2 repetitions of the same sequence), as shown in the example of FIG.8, which is the diagram of the signal format when N2 = 3 and M2 = 2; optionally, the first beam is used to transmit on the N2 = 3 sequences, and the second beam and the third beam are used to transmit on the M2 = 2 sequences respectively; in an implementation, the N2 sequences transmitted using the first beam are the first N2 sequences among the N2+M2 sequences; wherein, N2 is related to the number of beams used by the network device to receive in the first beam mode, and M2 is related to the number of beams used by the UE to transmit in the first beam mode. For example, if the network device receives gURS using 3 beams in the first beam mode, N2 = 3, if the UE transmits gURS using 3 beams in the first beam mode, M2 = 3-1 = 2; in addition, N1 and M1 may also be set to other values related to the number of receive beams of the UE and the number of transmit beams of the network device in the first beam mode;

[0256] ◇ The N2+M2 sequences may be replaced by N2+M2 gURS signals in signal format 2, and the method is similar and will not be described again;

[0257] ◇ In an implementation, the N2+M2 sequences are continuous or adjacent in the time domain;

[0258] ◇ In an implementation, the N2+M2 sequences have a first time gap in the time domain, and the first time gap may facilitate beam switching when the network device transmits the N2+M2 sequences;

[0259] - The number of sequences or signals or repetitions in the above various signal formats may be the same or different. For example, the representation with Nu is only for convenience of expression, and is not intended to limit the number of sequences, signals, or repetitions involved in various signal formats to the same number;

[0260] - The N2 and M2 are positive integers, which are predefined or network device configured values;

[0261] - The first time gap may be:

[0262] ◇ a predefined or network configured time unit value;

[0263] ◇ may be obtained by shifting a sequence with a first sample number;

[0264] ◇ the first time gap may be the same as or different from the first time gap described above for gDRS;

[0265] □ resource configuration information in time domain frequency domain, including configuration information in time domain (for example, including the time domain unit starting point of each gURS occasion, the number of time domain units occupied by each gURS occasion, etc.) and / or configuration information in frequency domain (for example, including the frequency domain unit starting point of each gURS occasion, the number of frequency domain units occupied by each gURS occasion, etc.), where a gURS occasion is represented as a set of the number of time domain units and the number of frequency domain units transmitting a complete signal in a gURS signal format, such as N0 OFDM symbols and M0 PRBs;

[0266] □ configuration information for sequence generation, including, for example, sequence length information, and / or sequence initial index, and / or sequence index, and / or sequence type indication required to generate the first gURS sequence;

[0267] □ when multiple available gURS resources (gURS time-frequency resources and / or sequence resources) are available, randomly select one to transmit with equal probability;

[0268] ◆ transmission configuration information of the first gURS, including at least one of:

[0269] □ transmit power configuration information, including at least one of:

[0270] - information related to transmit power, including, for example, an initial power P0, and / or a path loss compensation factor alpha0, optionally alpha0 = 1;

[0271] - information indicating that the initial power P0 reuses the same initial power P_prach_target of the random access channel;

[0272] - information indicating the UE to transmit multiple gURS signals in a gURS signal format using the same transmit power;

[0273] - transmit power information and / or power offset information, for example, the UE can determine the power used to transmit the gURS signal of the first beam based on the transmit power information, and obtain the power of the gURS signal of other beams based on the power offset information; for example, if the UE determines to use power P1 to transmit the gURS signal of the first beam, the UE uses power P2 to transmit the gURS signal of the second beam (or third beam), where P2 = P1 + P_delta, where P_delta is preset or network configured power offset (for example, obtained through the power offset information). In an implementation, P_delta is determined based on whether DBF is supported;

[0274] ◆ configuration information of transmit beam coefficients, including a combination of one or more of:

[0275] - configuration information related to beam coefficients of the first beam. according to such configuration information, the UE may determine the format of the beam coefficients (expressed as W1 or Wsum) of the first beam (also expressed as sum beam), such as Wsum= [Wc1, Wc2,... WcY] = [WTr1, WTr2,... WTrX]T, X, Y are the number of antenna elements in two dimensions of the antenna array, respectively; UTstands for transpose operation on U; the specific design and selection of beam coefficients Wc1, Wc2,... WcYand / or WTr1, WTr2,... WTrXare not limited;

[0276] - information related to beam coefficients of other beams, for example, based on such information, the UE may determine the beam coefficients of other beams based on the beam coefficients of the first beam; for example, the information may indicate that the first beam mode is DBF and / or the first beam is a sum beam, and the UE may determine the format of the beam coefficients of the second beam (which may also be expressed as a differential beam) and / or the third beam (which may also be expressed as a differential beam) (denoted as Wdiff1and Wdiff2) through a differential relationship based on the beam coefficients of the first beam, the second beam and the third beam may be differential beams in different dimensions, for example, a differential beam in horizontal direction or a differential beam in vertical direction; for example:

[0277] ◇ the second beam may be obtained based on the beam coefficients of the first beam, for example, Wdiff1= [Wc1, Wc2,..., WcY / 2,-Wc (Y / 2 +1),-Wc (Y / 2 +2),..., WcY]; and / or

[0278] ◇ boresight direction information and / or information related to angle offset of beam, according to such information, the UE may determine the boresight direction angle 1 of the first beam and determine the beam coefficients W1 of the first beam, and determine the format of the beam coefficients of the second beam and / or the third beam (denoted as W2 and W3) according to the beam coefficients W1 of the first beam, for example, the boresight direction angle 2 and the boresight direction angle 3 of the second beam and the third beam may be set according to a certain angle deviation (e.g., determined based on information related to the angle offset) based on the boresight direction angle 1 of W1, thereby designing beam coefficients corresponding to the boresight direction angle 2 and the boresight direction angle 3;

[0279] ◆ the UE transmits the first gURS based on the obtained configuration information of the first gURS, including at least one of:

[0280] □ selecting the first gURS resource

[0281] □ determining transmit beam coefficients

[0282] □ determining transmit power

[0283] □ transmitting the first gURS through the selected first gURS resource with a spatial filter or beam (e.g., quasi co-located (QCL) antenna port, QCLed time-frequency resource, QCL source, QCL assumption, TCI state, resource index, etc.) to which transmit beam coefficients correspond and the determined transmit power, the first gURS having a format configured by the network device through format configuration information;

[0284] ●the UE receives first feedback information informed by the network device (for example, based on the received first gURS), wherein the specific operations include one or more of:

[0285] ■ the network device receives and measures the first gURS to obtain the first feedback information, which includes one or more of:

[0286] ◆ optionally, the base station receives the first gURS using the same receive beam; alternatively, the base station may also receive the first gURS using multiple associated beams involved in the first beam mode;

[0287] ◆ the first feedback information includes one or more of:

[0288] □ information related to measurement of the first gURS, including one or more of:

[0289] - a received signal measured value, which may be a reference signal received power value (RSRP), and / or a reference signal received path power (RSRPP) of a path; when RSRPP is the received signal measured value, the path may be the first path in the time domain, the first path with a power amplitude greater than (not less than) a certain threshold in the time domain, or the path with the largest power amplitude in the time domain; the index of the above path in the sampled path set is labeled as the selected path index i;

[0290] - the received signal ratio including the ratio of the received signal measured value of the received first beam signal (received signal measured value 1) to the received signal measured value of the received second beam signal (received signal measured value 2), i.e., received signal ratio12 = received signal measured value 1 / received signal measured value 2, which may also be extended to the ratio of the received signal measured value of the first beam signal to the received signal measured value of the received third beam signal (received signal 2), that is, signal ratio 13 = received signal measured value 1 / received signal measured value 3;

[0291] - optionally, when the RSRPP of a path is selected for ratio, the received signals of path obtained by receiving each beam signal are all the same selected path index described above; the selected path index may be obtained by receiving the signal of the first beam, and then based on the selected path, the RSRPP value of path with the corresponding path index of receiving the signal of the second beam and / or the third beam is obtained, and the ratio is calculated, that is, received signal ratio 12= RSRPPi 1 / RSRPPi 2 or received signal ratio 13 = RSRPPi 1 / RSRPPi 3;

[0292] - an angle deviation value (or an angle adjustment value) including an angle deviation value from a reference direction, where the reference direction is the boresight direction of the first beam, which may also be a specific direction indicated by the base station;

[0293] - an expected beam index; that is, the network device feeds back the expected beam index inferred based on the measurement results, specifically including: based on the obtained angle deviation value, the boresight direction corresponding to the current beam index and the boresight direction corresponding to other beam indexes, the network device may infer that the boresight direction of another beam index is closer to the signal reception by the UE. For example, the boresight direction of the current beam index (expressed as beam index 1) is 30 degree, and the boresight directions of the other two beam indexes (beam index 0 and beam index 2) are 24 degree and 36 degree respectively, and the angle deviation value obtained by measurement is +5 degree, that is, 35 degree is the best transmit beam direction of the UE. At this time, beam index 2 is the expected beam index;

[0294] □ configuration information of a second gURS, including one or more of:

[0295] - resource configuration information of the second gURS,

[0296] ◇ resource configuration information in time domain frequency domain, including configuration information in time domain (for example, the time domain unit starting point of each gURS occasion, the number of time domain units occupied by each gURS occasion, etc.) and / or configuration information in frequency domain (for example, the frequency domain unit starting point of each gURS occasion, the number of frequency domain units occupied by each gURS occasion, etc.), where a gURS occasion is represented as a set of the number of time domain units and frequency domain units transmitting a complete signal in a gURS signal format, such as N0 OFDM symbols and M0 PRBs;

[0297] ◇ configuration information for sequence generation, including sequence length information, and / or sequence initial index, and / or sequence index, and / or sequence type indication required to generate the second gURS sequence;

[0298] ◇ when multiple available gURS resources (gURS time-frequency resources and / or sequence resources) are available, the UE may randomly select one to transmit with equal probability;

[0299] - signal format configuration information of the second gURS, including one or more of:

[0300] ◇ signal format information, for example, configurable signal formats including possible signal formats for the first gURS described above;

[0301] ◇ optionally, information indicating that the signal format of the second gURS reuses the signal format of the aforementioned first gURS, for example, the signal format of the configured second gURS reuses the signal format of the aforementioned first gURS, that is, the signal format of the second gURS is the same as the signal format of the aforementioned first gURS, using the same signal format;

[0302] ◇ optionally, information indicating the network device enables reception with DBF, for example, the network device configures the UE with an, and the UE receives the indication on enabling DBF reception configured by the network device to the UE; optionally, at this time, when the UE receives the indication on enabling DBF reception configured by the network device to the UE, the UE expects to receive gURS format 4, for example, the UE expects to transmit gURS format 4;

[0303] - transmit power configuration information of the second gURS, including at least one of:

[0304] ◇ information related to transmit power, including, for example, including an initial power P0, and / or a path loss compensation factor alpha0, optionally alpha0 = 1;

[0305] ◇ information indicating that the initial power P0 reuses the transmit power of the random access channel or the first gURS, for example, the transmit power of the second gURS uses the same initial power P_prach_target as the random access channel, or reuses the transmit power configuration of the first gURS;

[0306] ◇ information indicating the UE to transmit multiple gURS signals or sequences in a gURS signal format using a same transmit power;

[0307] ◇ information indicating the UE to transmit the second gURS using the same transmit power as the first gURS; optionally, the UE uses the path loss value obtained through the same downlink reference signal as that for the first gURS. For example, the transmit power configuration information of the second gURS may include information indicating that the UE uses the same downlink reference signal as that for the first gURS to obtain the path loss value, or include information indicating that the same path loss source as that for the first gURS is used for the second gURS;

[0308] ◇ transmit power information and / or power offset information, for example, the UE may determine the power used to transmit the gURS signal of the first beam based on the transmit power information, and obtain the power for the gURS signal of other beams based on the power offset information; for example, if the UE determines to use power P1 to transmit the first gURS signal, the UE uses power P2 to transmit the second gURS signal, where P2 = P1 + P_delta, where P_delta is a preset or network configured power offset (for example, obtained based on the power offset information), in an implementation, P_delta is determined based on whether DBF is supported;

[0309] ■ the UE receives the first feedback information, which includes one or more of the following:

[0310] ◆ the UE monitors the first feedback information from the network device in accordance with the received (UE and / or DBF) dedicated Control Resource Set (CORESET) / Search Space (SS) configuration; specifically, including at least one of:

[0311] □ dedicated CORESET configuration information, and / or configuration index;

[0312] □ dedicated SS configuration information, and / or configuration index;

[0313] □ dedicated RNTI

[0314] □ dedicated DCI format

[0315] ◆ the UE monitors the first feedback information from the network device according to the DCI (including the first feedback information) carried in the received dedicated PDCCH,

[0316] ●the UE transmits the second gURS to the network device (such as a base station, etc.) according to the obtained first feedback information, where specific operations include one or more of:

[0317] ■ determine the second gURS signal to transmit based on the obtained first feedback information (such as the configuration information of the second gURS);

[0318] ■ determining beam information for transmitting the second gURS signal according to the obtained first feedback information (e.g., information related to measurement of the first gURS);

[0319] ■ determining the transmit power for transmitting the second gURS, for example, based on the transmit power configuration information of the second gURS;

[0320] ●the UE receiving second feedback information informed by the network device (e.g., according to the received second gURS), wherein the specific operations include one or more of:

[0321] ■ the UE monitoring the second feedback information from the network device according to the received dedicated CORESET / SS configuration;

[0322] ■ the second feedback information includes at least one of:

[0323] ◆ transmit beam determination indication, including that the transmit beam of the second gURS meets the threshold requirements, such as 1 bit informs that the transmit beam of the second gURS continues being used for the transmission of subsequent uplink signals;

[0324] ◆ uplink transmit power configuration, or update configuration, the transmit power configuration is used for subsequent uplink signal transmission, which specifically includes one or more of:

[0325] □ information related to transmit power, such as an initial power P0, and / or a path loss compensation factor alpha0, optionally alpha0 = 1;

[0326] □ information indicating that the initial power P0 reuses the transmit power configuration of the random access channel or the first gURS or the second gURS, for example, the initial power P0 uses the same initial power P_prach_target as the random access channel, or reuses the transmit power configuration of the first gURS, or reuses the transmit power configuration of the second gURS;

[0327] □ information indicating that the UE uses the same transmit power as the first gURS or the second gURS; optionally, the UE uses the same downlink reference signal as that for the first gURS or the second gURS to obtain the path loss value;

[0328] □ power offset information, for example, if the same transmit power of the first gURS or the second gURS is expressed as P_t, then the transmit power configuration also includes an offset value P_offset relative to the P_t, that is, the transmit power P = P_t + P_offset, and the offset value may be a positive value (that is, increasing power) or a negative value (that is, reducing power, such as reducing interference);

[0329] ◆ timing advance (or timing advance update value), the timing advance (or timing advance update value) is used for subsequent uplink signal transmission, where specifically includes one or more of:

[0330] □ an absolute timing advance value (e.g., a value of X time units);

[0331] □ a timing advance adjustment value, for example, the current timing advance value is TA, and the UE receives the timing advance adjustment value TA_update, then the obtained new TA value is TA_new = TA + TA_update; optionally, the TA value (and / or TA adjustment value) is associated with the transmit beam of the gURS, for example, associated with the gURS resource index of the transmit beam, etc.;

[0332] ●optionally, the UE performs beam update,where specific operations include one or more of:

[0333] ■ the UE monitors the dedicated CORESET / SS configured by the network device for uplink beam update (or failure recovery) indication, where the dedicated CORESET / SS includes at least one of:

[0334] ◆ dedicated RNTI

[0335] ◆ dedicated DCI format

[0336] ◆ indication information on activating transmitting of the first gURS, if the indication information is received, the UE repeats the previous steps, including aspects related to at least some of the aforementioned"the UE transmits first gURS to the network device (such as a base station, etc.)", "the UE receives first feedback information informed by the network device (for example, based on the received first gURS)", "the UE transmits the second gURS to the network device (such as a base station, etc.) according to the obtained first feedback information", "the UE receiving second feedback information informed by the network device (e.g., according to the received second gURS)";

[0337] ■ the UE receives the sixth gDRS transmitted by the network device (such as a base station), obtains a second measured value. When it is determined based on the second measured value that one or more of the following conditions are met, the UE transmits a beam update request to the network device, the conditions include at least one of:

[0338] ◆ the second measured value is not greater than (or less than) a threshold value;

[0339] ◆ the number of times where the second measured value is not greater than (or less than) the threshold value is greater than or equal to a threshold number of times;

[0340] ◆ the number of times where the second measured value is not greater than (or less than) the threshold value continuously is greater than or equal to a threshold number of times;

[0341] ◆ u according to the UE capability, when the uplink transmit power inferred based on the second measured value is not greater than (or less than) a threshold value;

[0342] wherein, the transmitting beam update request comprises:

[0343] ◆ carrying through PUCCH or UL MAC CE or higher layer signaling;

[0344] ◆ UE recommended beam direction or beam reference signal index.

[0345] FIG. 9 illustrates a schematic structural diagram of a user equipment 900 according to at least one embodiment of the present disclosure. Referring to FIG. 9, the user equipment 900 includes a transceiver 901 and a controller 902. The transceiver 901 is configured to transmit data or signals and to receive data or signals. The controller 902 is coupled with the transceiver 901 and configured to perform control such that the user equipment 900 performs a method according to an embodiment of the present disclosure. In an implementation, the user equipment 900 may also include a memory (not shown) on which computer-executable instructions are stored. When the instructions are executed by the controller 902, the user equipment 900 may perform at least one method corresponding to the above-mentioned embodiments of the present disclosure.

[0346] FIG. 10 illustrates a schematic structural diagram of a base station 1400 according to at least one embodiment of the present disclosure. Referring to FIG. 10, the base station 1400 includes a transceiver 1401 and a controller 1402. The transceiver 1401 is configured to transmit data or signals and to receive data or signals. The controller 1402 is coupled with the transceiver 1401 and configured to perform control such that the base station 1400 performs a method according to an embodiment of the present disclosure. In an implementation, the base station 1400 may also include a memory (not shown), and computer-executable instructions are stored on the memory. When the instructions are executed by the controller 1402, the base station 1400 may perform at least one method corresponding to the above embodiments of the present disclosure.

[0347] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

[0348] Those skilled in the art will appreciate that the present disclosure includes reference to devices for performing one or more of the operations described herein. These devices may be specially designed and manufactured for the required purposes, or they may comprise known devices found in general purpose computers. These devices have computer programs stored therein that are selectively activated or reconfigured. Such a computer program may be stored in a device (e.g., computer) readable medium including, but not limited to, any type of disk including floppy disks, hard disks, optical disks, CD-ROMs, and magnetic-optical disks, ROM (Read-Only Memory, Read-Only Memory), RAM (Random Access Memory), EPROM (Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), flash memory, magnetic card or optical card. That is, a readable medium includes any medium that stores or transmits information in a form readable by a device (e.g., a computer).

[0349] It will be understood by those skilled in the art that each block of the structural diagrams and / or block diagrams and / or flow diagrams, and combinations of blocks in the structural diagrams and / or block diagrams and / or flow diagrams, may be implemented by computer program instructions. Those skilled in the art can understand that these computer program instructions may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing method for implementation, so that the scheme specified in the structural diagrams and / or block diagrams and / or flow diagrams disclosed in the present disclosure may be executed by the processor of the computer or other programmable data processing method.

[0350] Those skilled in the art can understand that the steps, measures, and solutions in the various operations, methods, and processes that have been discussed in the present disclosure may be alternated, changed, combined, or deleted. Furthermore, other steps, measures, and solutions in the various operations, methods, and processes that have been discussed in the present disclosure can also be alternated, changed, rearranged, decomposed, combined, or deleted. Furthermore, the steps, measures, and solutions in the various operations, methods, and processes disclosed in the present disclosure in the prior art can also be alternated, changed, rearranged, decomposed, combined, or deleted.

[0351] The above are only some embodiments of the present disclosure. It should be noted that those of ordinary skill in the art can also make several improvements and modifications without departing from the principles of the present disclosure. These improvements and modifications are also It should be regarded as the protection scope of the present disclosure.

Claims

1.A method performed by a user equipment (UE) in a communication system, the method comprising:receiving first configuration information from a network device, the first configuration information including configuration information related to first uplink reference signal and first information related to beam for transmitting the first uplink reference signal;transmitting first uplink reference signal including at least one of multiple signals or multiple sequences to the network device based on the first configuration information;receiving first feedback information from the network device, the first feedback information corresponding to the at least one of the multiple signals or the multiple sequences;transmitting second uplink reference signal to the network device through information related to beam determined based on the first feedback information; andreceiving second feedback information from the network device, the second feedback information including information related to uplink transmission.2.The method of claim 1, wherein the first configuration information includes at least one of:configuration information of the first uplink reference signal, transmission configuration information of the first uplink reference signal, wherein the configuration information of the first uplink reference signal includes format configuration information associated with a format of the first uplink reference signal,the format configuration information includes configuration information related to at least one of the following formats:a first format in which reference signal includes N2 sequences or N2 repetitions of a sequence in time domain;a second format in which reference signal includes N2 signals or N2 repetitions of a signal in time domain;a third format in which reference signal includes N2 sequences or N2 repetitions of a sequence in frequency domain;a fourth format, in which reference signal includes N2+M2 sequences or N2+M2 repetitions of a sequence in time domain, and the first N2 sequences or repetitions are related to a number of receive beams of the network device and the remaining M2 sequences or repetitions are related to a number of transmit beams of the UE,wherein, N2 and M2 are positive integers.3.The method of claim 2, wherein the N2 sequences or N2 repetitions of a sequence, N2 signals or N2 repetitions of a signal, or N2+M2 sequences or N2+M2 repetitions of a sequence are consecutive or adjacent in time domain or frequency domain, orthere is a gap between two adjacent sequences, signals, or repetitions among the N2 sequences or N2 repetitions of a sequence, N2 signals or N2 repetitions of a signal, or N2+M2 sequences or N2+M2 repetitions of a sequence in time domain or frequency domain.4.The method of claim 2, wherein the configuration information of the first uplink reference signal further includes at least one of resource configuration information of the first uplink reference signal or configuration information related to sequence of the first uplink reference signal.5.The method of claim 2, wherein the transmission configuration information of the first uplink reference signal includes at least one of: transmit power configuration information, and configuration information of transmit beam, wherein the configuration information of transmit beam includes:coefficient information of multiple transmit beams to which the first beam mode relates; orcoefficient information of a first beam among the multiple transmit beams, wherein coefficients of other transmit beams among the multiple transmit beams are derived based on the coefficient information of the first beam,wherein the transmit power configuration information includes at least one of:at least one of transmit power information or path loss compensation factor of the first uplink reference signal;information indicating that transmit power of the first uplink reference signal reuses initial transmit power of random access channel;information indicating that transmit power of the at least one of the multiple signals or multiple sequences is the same;information indicating offset between transmit power of the at least one of the multiple signals or multiple sequences.6.The method of claim 2, wherein the first feedback information includes at least one of:second information related to a measurement result of the first uplink reference signal, the second information including information corresponding to the at least one of the multiple signals or sequences included in the first uplink reference signal;configuration information of the second uplink reference signal.7.The method of claim 6, wherein the second information includes at least one of: a measured value of the first uplink reference signal, ratio of measured values of at least one of multiple signals or multiple sequences included in the first uplink reference signal, an angle deviation value, and information related to an expected beam.8.The method of claim 6, wherein the configuration information of the second uplink reference signal includes format configuration information associated with a format of the second uplink reference signal, or third information related to beam for the network device to receive the second uplink reference signal,the format configuration information indicates that a format of the second uplink reference signal is the same as a format of the first uplink reference signal, orthe format configuration information includes configuration information of at least one format among the first format, the second format, the third format, and the fourth format,based on the third information, the UE expects the second uplink reference signal to be in the fourth format.9.The method of claim 1, wherein the receiving first feedback information from the network device comprises:receiving the first feedback information through receiving DCI in PDCCH for the UE or the first information; ormonitoring the first feedback information based on second configuration information for the UE or the first information,wherein the second configuration information includes at least one of:CORESET configuration information or configuration index for the UE or the first information;search space (SS) configuration information or configuration index for the UE or the first information;RNTI for the UE or the first information;a DCI format for the UE or the first information.10.The method of claim 1, wherein the information related to uplink transmission includes at least one of:indication information related to transmit beam;configuration information of uplink transmit power;information related to timing advance.11.The method of claim 10, wherein the indication information related to transmit beam includes information indicating transmit beam of the second uplink reference signal to be used for uplink transmission, wherein the configuration information of uplink transmit power includes at least one of:at least one of transmit power information or path loss compensation factor;information indicating the transmit power reuses transmit power of random access channel, the first uplink reference signal, or the second reference signal;information indicating an offset value between the transmit power and transmit power of the first uplink reference signal or the second reference signal,wherein the information related to timing advance includes a timing advance value or a timing advance adjustment value.12.The method of claim 1, further comprising:receiving downlink reference signal from the network device to obtain a second measured value;transmitting a beam update request to the network device if the second measured value satisfies a first condition,wherein the first condition includes at least one of:the second measured value is not greater than a first threshold value;a number of times where the second measured value is not greater than the first threshold is not less than a second threshold;a number of consecutive times where the second measured value is not greater than the first threshold value is not less than a third threshold value;uplink transmit power obtained based on UE capability and the second measured value is not greater than a fourth threshold.13.A method performed by a network device in a communication system, the method comprising:transmitting first configuration information to a user equipment (UE), the first configuration information includes configuration information related to first uplink reference signal and first information related to beam for transmitting the first uplink reference signal;receiving first uplink reference signal including at least one of multiple signals or multiple sequences from the UE;transmitting first feedback information to the UE, the first feedback information corresponding to the at least one of the multiple signals or the multiple sequences;receiving second uplink reference signal from the UE;transmitting second feedback information to the UE, the second feedback information including information related to uplink transmission.14.A user equipment (UE) comprising:a transceiver;a processor coupled with the transceiver and configured to:receive first configuration information from a network device, the first configuration information including configuration information related to first uplink reference signal and first information related to beam for transmitting the first uplink reference signal;transmit first uplink reference signal including at least one of multiple signals or multiple sequences to the network device based on the first configuration information;receive first feedback information from the network device, the first feedback information corresponding to the at least one of the multiple signals or the multiple sequences;transmit second uplink reference signal to the network device through information related to beam determined based on the first feedback information;receive second feedback information from the network device, the second feedback information including information related to uplink transmission.15.A network device comprising:a transceiver;a processor coupled with the transceiver and configured to:transmit first configuration information to a user equipment (UE), the first configuration information includes configuration information related to first uplink reference signal and first information related to beam for transmitting the first uplink reference signal;receive first uplink reference signal including at least one of multiple signals or multiple sequences from the UE;transmit first feedback information to the UE, the first feedback information corresponding to the at least one of the multiple signals or multiple sequences;receive second uplink reference signal from the UE; andtransmit second feedback information to the UE, the second feedback information including information related to uplink transmission.

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