Random access method and device

Abstract

The invention relates to a random access method and equipment. According to at least one embodiment of the present disclosure, there is provided a method performed by a first device in a communication system, comprising: transmitting a first message related to a random access procedure to a base station to request measurement of a reference signal; receiving, from the base station, a second message related to a random access procedure or a PDCCH for scheduling the second message to obtain fourth information related to a measurement configuration of the reference signal; based on the fourth information, performing measurement of the reference signal to obtain a measurement result; and reporting the measurement result.

Description

Technical Field

[0001] This disclosure relates to the field of wireless communications, and more specifically, to methods and apparatus related to random access. Background Technology

[0002] Given the successive generations of wireless communication development, these technologies have primarily been developed for human-oriented services such as voice calls, multimedia services, and data services. With the commercialization of fifth-generation (5G) communication systems, the number of connected devices is expected to grow exponentially. These will increasingly connect to communication networks. Examples of the Internet of Things (IoT) can include vehicles, robots, drones, home appliances, displays, smart sensors connected to various infrastructures, construction machinery, and factory equipment. Mobile devices are expected to evolve in various forms, such as augmented reality glasses, virtual reality headsets, and holographic devices. Efforts are underway to develop improved 6G communication systems to provide a wide range of services by connecting hundreds of billions of devices and things in the sixth-generation (6G) era. For these reasons, 6G communication systems are referred to as "beyond 5G" systems.

[0003] The 6G communication system, which is expected to be commercialized around 2030, will have peak data rates in the megabit (1,000 gigabits) bps range and radio latency of less than 100 μsec. Therefore, it will be 50 times the data rate of the 5G communication system and have 1 / 10 of its radio latency.

[0004] To achieve such high data rates and ultra-low latency, 6G communication systems have been considered for implementation in the terahertz band (e.g., the 95 GHz to 3 THz band). It is anticipated that technologies capable of ensuring signal transmission distance (i.e., coverage) will become even more critical, as path loss and atmospheric absorption in the terahertz band are more severe than those in the millimeter-wave (mmWave) band introduced in 5G. As a key technology for ensuring coverage, it is necessary to develop radio frequency (RF) components, antennas, and novel waveforms with better coverage than orthogonal frequency division multiplexing (OFDM), beamforming and massive MIMO, full-dimensional MIMO (FD-MIMO), array antennas, and multi-antenna transmission technologies such as massive MIMO. Furthermore, new technologies for improving terahertz band signal coverage have been discussed, such as metamaterial-based lenses and antennas, orbital angular momentum (OAM), and reconfigurable smart surfaces (RIS).

[0005] Furthermore, to improve spectrum efficiency and overall network performance, the following technologies have been developed for 6G communication systems: full-duplex technology enabling uplink and downlink transmissions to use the same frequency resources simultaneously; network technologies that comprehensively utilize satellites, high-altitude platform stations (HAPS), etc.; improved network architectures to support mobile base stations, etc., and to enable network operation optimization and automation; dynamic spectrum sharing technology based on spectrum usage prediction and conflict avoidance; the use of artificial intelligence (AI) in wireless communication to improve overall network operation by leveraging AI from the design phase of 6G development and internalizing end-to-end AI support functions; and next-generation distributed computing technologies that overcome user equipment (UE) computing power limitations through ultra-high-performance communication and computing resources achievable on the network, such as mobile edge computing (MEC), cloud, etc. In addition, efforts are continuing to enhance connectivity between devices, optimize networks, promote the software-defined networking of network entities, and increase the openness of wireless communication by designing new protocols to be used in 6G communication systems, developing mechanisms for achieving hardware-based secure environments and secure data use, and developing technologies for maintaining privacy.

[0006] The research and development of 6G communication systems, encompassing both human-to-machine (P2M) and machine-to-machine (M2M) hyper-connectivity, is expected to deliver the next wave of hyper-connected experiences. Specifically, services such as truly immersive extended reality (XR), high-fidelity mobile holograms, and digital replicas are anticipated to be available through 6G communication systems. Furthermore, services such as remote surgery for enhanced security and reliability, industrial automation, and emergency response will be provided via 6G communication systems, enabling the technology to be applied across a wide range of sectors including industry, healthcare, automotive, and home appliances. Summary of the Invention

[0007] According to at least one embodiment of the present disclosure, a method performed by a first device in a communication system is provided, comprising:

[0008] Send a first message to the base station relating to the random access procedure to request a measurement of the reference signal;

[0009] Receive a second message related to the random access procedure or a PDCCH for scheduling the second message from the base station to obtain fourth information related to the measurement configuration of the reference signal;

[0010] Based on the fourth information, the reference signal is measured to obtain the measurement result;

[0011] Report the measurement results.

[0012] In one implementation, the first message is message 1, message 3, or message A in the random access procedure, and the first message includes indication information indicating a request for measurement of a reference signal.

[0013] In one implementation, the indication information includes one bit or more bits.

[0014] In cases where the indication information includes multiple bits, the multiple bits are also used to indicate a recommended reference signal index.

[0015] In one implementation, the recommended reference signal index includes at least one of the following: a reference signal index previously used for beam association, and a reference signal index associated with measurement results obtained from previous measurements during random access.

[0016] In one implementation, one of the bits used to indicate the recommended reference signal index is used to indicate whether the recommended reference signal index is related to a previously used reference signal index or to a measurement result obtained by measuring the reference signal during the random access process.

[0017] In one implementation, if message 4 in the random access procedure indicates a contention failure, a first message is sent to the base station, wherein the indication information indicates a request for measurement of the reference signal.

[0018] In one implementation, if message 4 in the random access procedure indicates contention failure, a first message is sent to the base station, wherein the indication information indicates that a measurement of the reference signal is not requested.

[0019] In one implementation, if the indication information includes multiple bits, the indication information is also used to indicate a recommended reference signal index.

[0020] In one implementation, the first message is message 1 or message A during the random access process, and

[0021] The first message is sent using a preamble for the first type and / or on a random access timing (RO) for the first type, and the first device is of the first type.

[0022] In one implementation, if message 4 in the random access process indicates contention failure, a first message is sent to the base station, wherein the first message uses a preamble for a first type and / or is sent on a RO for the first type.

[0023] In one implementation, if message 4 in the random access procedure indicates contention failure, a first message is sent to the base station, wherein the first message is sent using a first preamble and / or on a first RO.

[0024] The first preamble includes preambles other than those used for the first type of preamble, or preambles other than those used for requesting the measurement of a reference signal in the first type of preamble, or preambles used for measurements in the first type of preamble that do not request a reference signal.

[0025] The first RO includes ROs other than those used for the first type of RO, or ROs other than those used for measurements of the first type of RO that request a reference signal, or ROs used for measurements of the first type of RO that do not request a reference signal.

[0026] In one implementation, the second message includes message 2, message 4, or message B from the random access procedure.

[0027] The fourth information includes the first information in the measurement configuration or the measurement configuration information in the indication configuration information set, wherein the first information includes part or all of the measurement configuration information.

[0028] In one implementation, the method further includes: obtaining the configuration information set.

[0029] The configuration information set is either predefined or obtained through system information.

[0030] In one implementation, obtaining the configuration information set through system information includes:

[0031] A third message is sent to the base station, the third message being used to request system information including the configuration information set;

[0032] The system information, including the configuration information set, is received via the fourth message.

[0033] In one implementation, the third message is a first message, wherein the first message includes fourth indication information for requesting the configuration information set, or the first message is sent via a preamble for requesting the configuration information set, and / or

[0034] The fourth message is the second message.

[0035] In one implementation, the preamble used to request the configuration information set is obtained through system information carried in the SSB.

[0036] In one implementation, the measurement configuration includes at least one of the following: configuration information related to the reference signal measurement, configuration information related to the reporting of the reference signal measurement results, and triggering information for the reference signal measurement and the reporting of the measurement results.

[0037] In one implementation, the measurement configuration further includes second information, which is predefined or preconfigured.

[0038] In one implementation, the first information includes at least one of the following: resource configuration information for the reference signal, bandwidth information for measuring the reference signal, time-related information for measuring the reference signal, and time-related information for reporting the measurement results of the reference signal.

[0039] The second information includes at least one of the following: information related to the resource type of the reference signal, the resources of the reference signal, information related to the measurement content, the type of measurement result reporting, and the content of the measurement result reporting.

[0040] In one implementation, reporting the measurement results includes:

[0041] If the first message is message A, then the measurement result is reported via message B of the random access procedure; or

[0042] If the first message is message 1, the measurement result is reported via message 3 of the random access procedure; or

[0043] If the first message is message 3, then:

[0044] The measurement results are reported using resources scheduled through the third information, wherein the third information is received via message 4 or after an ACK for message 4 is sent, or

[0045] The measurement results are reported via PUCCH used for the ACK of message 4.

[0046] In one implementation, reporting the measurement results includes: reporting a first measurement result via a first uplink signaling associated with random access, and reporting a second measurement result via a second uplink signaling associated with random access.

[0047] In one implementation, if there is a measurement result with a power measurement value greater than a threshold among the measurement results corresponding to the first measurement result, then the first measurement result is reported in the first signaling. For example, the first measurement result is the measurement result with the largest power measurement value among the measurement results corresponding to the first measurement result; otherwise, information indicating that there is no measurement result that meets the threshold is reported.

[0048] In one implementation, the first signaling is msg3, and the second signaling is a signaling sent together with ACK on the PUCCH channel (or msg5), or the second signaling is msg3 in the next round of random access attempts after contention failure.

[0049] In one implementation, the first signaling is msg5, and the second signaling is the signal on the PUSCH that is scheduled after msg5.

[0050] In one implementation, the first measurement result is the measurement result with the largest power measurement value among the partial measurement results, and the second measurement result is the measurement result with the largest power measurement value among all measurement results. The first measurement result and the second measurement result correspond to the same beam or different beams.

[0051] In one implementation, the method further includes receiving information relating to a method for requesting a measurement of a reference signal, for example, the information being determined by information included and / or indicated by an SSB transmitted by a base station.

[0052] According to at least one embodiment of the present disclosure, a method performed by a base station in a communication system is provided, comprising:

[0053] Receive a first message relating to the random access procedure, the first message requesting a measurement of a reference signal;

[0054] The fourth information relating to the measurement configuration of the reference signal is sent to the first device via a second message related to the random access procedure or a PDCCH used to schedule the second message;

[0055] Receive the measurement results of the reference signal reported by the first device.

[0056] According to at least one embodiment of the present disclosure, a first device in a communication system is provided, comprising:

[0057] A transceiver is configured to transmit and / or receive signals;

[0058] A controller is configured to control the first device to perform the method described according to at least one embodiment of the present disclosure.

[0059] According to at least one embodiment of the present disclosure, a base station in a communication system is provided, comprising:

[0060] A transceiver is configured to transmit and / or receive signals;

[0061] A controller is configured to control the base station to perform the method described according to at least one embodiment of the present disclosure. Attached Figure Description

[0062] Figure 1 An example wireless network according to an embodiment of the present disclosure is shown;

[0063] Figure 2 An example base station according to an embodiment of the present disclosure is shown;

[0064] Figure 3 An example user equipment according to an embodiment of the present disclosure is shown;

[0065] Figure 4 An example structural diagram of CPE is shown;

[0066] Figure 5 A schematic diagram of a terminal receiving an SSB is shown;

[0067] Figure 6 A schematic diagram illustrating the interaction between the CPE and the base station is shown.

[0068] Figure 7 A schematic diagram illustrating the interaction between the CPE and the base station is shown.

[0069] Figure 8 An example flowchart of the method executed by CPE is shown;

[0070] Figure 9 A schematic diagram illustrating the interaction between the CPE and the base station is shown.

[0071] Figure 10 A schematic diagram illustrating the interaction between the CPE and the base station is shown.

[0072] Figure 11A and Figure 11B A schematic diagram illustrating the interaction between the CPE and the base station is shown.

[0073] Figure 12 A schematic diagram illustrating the interaction between the CPE and the base station is shown.

[0074] Figure 13 A schematic diagram of the structure of a first device according to at least one embodiment of the present disclosure is shown;

[0075] Figure 14 A schematic diagram of the structure of a network device (e.g., a base station) according to at least one embodiment of the present disclosure is shown;

[0076] Figure 15 A schematic flowchart illustrating a method performed by a terminal (e.g., a CPE) according to at least one embodiment of the present disclosure is shown.

[0077] Figure 16 A schematic flowchart illustrating a method performed by a terminal (e.g., a CPE) according to at least one embodiment of the present disclosure is shown.

[0078] Figures 17 to 18A schematic diagram of a two-step measurement result reporting according to an embodiment of the present disclosure is shown. Detailed Implementation

[0079] Before proceeding with the following detailed description, it may be advantageous to define certain words and phrases used throughout the patent literature. The term “connection” and its derivatives refer to any direct or indirect communication between two or more elements, regardless of whether those elements are physically in contact with each other. The terms “transmit,” “receive,” and “transmit,” and their derivatives encompass both direct and indirect communication. The terms “comprise” and “include,” and their derivatives mean inclusion without limitation. The term “or” is concurrent, meaning both and / or. The phrase “associated with,” and its derivatives mean including, being included in, interconnected with, containing, being contained within, connected to or connected with, coupled to or coupled with, able to communicate with, cooperate with, intertwine, juxtapose, proximate, bound to or bound with, having, possessing attributes, having a relationship with, or having a relationship with, etc. The term “controller” means any device, system, or part thereof that controls at least one operation. Such a controller may be implemented in hardware or in a combination of hardware and software and / or firmware. The functionality associated with any particular controller, whether local or remote, can be centralized or distributed. The phrase "at least one" when used to list items means that different combinations of one or more of the listed items can be used, and it is possible that only one item in the list is needed. For example, "at least one of A, B, and C" includes any of the following combinations: A, B, C; A and B; A and C; B and C; and only A, only B, and only C. Similarly, the term "set" means one or more. Therefore, a set of items can be a single item or a set of two or more items.

[0080] Furthermore, the various functions described below can be implemented or supported by one or more computer programs, each function being formed by computer-readable program code and embodied in a computer-readable medium. The terms "application" and "program" refer to one or more computer programs, software components, instruction sets, procedures, functions, objects, classes, instances, associated data, or portions thereof suitable for implementation in appropriate computer-readable program code. The phrase "computer-readable program code" includes any type of computer code, including source code, object code, and executable code. The phrase "computer-readable medium" includes any type of medium accessible by a computer, such as read-only memory (ROM), random access memory (RAM), hard disk drive, optical disc (CD), digital video disc (DVD), or any other type of memory. "Non-transitory" computer-readable media excludes wired, wireless, optical, or other communication links that transmit transient electrical or other signals. Non-transitory computer-readable media includes media in which data can be permanently stored and media such as rewritable optical discs or erasable memory devices in which data can be stored and later rewritten.

[0081] Definitions for certain other words and phrases are provided throughout this patent document. Those skilled in the art will understand that, in many, if not the most, instances, such definitions apply to both prior and future use of the words and phrases defined in this way.

[0082] The figures and various embodiments included herein, used to illustrate the principles of this disclosure, are merely illustrative and should not be construed in any way as limiting the scope of this disclosure. Furthermore, those skilled in the art will understand that the principles of this disclosure can be implemented in any suitably arranged wireless communication system.

[0083] The following Figures 1 to 3 Various embodiments of this disclosure implemented in wireless communication systems are described. Figures 1 to 3 The description does not imply any physical or architectural limitations on the ways in which different embodiments can be implemented. Different embodiments of this disclosure can be implemented in any suitably arranged communication system.

[0084] Figure 1 An example wireless network according to an embodiment of this disclosure is shown. Figure 1 The embodiments of the wireless network shown are for illustrative purposes only. Other embodiments of the wireless network 100 may be used without departing from the scope of this disclosure.

[0085] like Figure 1As shown, the wireless network includes a base station (gNB or gNodeB) 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 network 130, such as the Internet, a proprietary Internet Protocol (IP) network, or other data networks.

[0086] gNB 102 provides wireless broadband access to network 130 to multiple first user equipments (UEs) within coverage area 120 of gNB 102. The multiple first UEs include UE 111, which may be located in a small business (SB); UE 112, which may be located in an enterprise (E); UE 113, which may be located in a WiFi hotspot (HS); UE 114, which may be located in a first residence (R1); UE 115, which may be located in a second residence (R2); and UE 116, which may be a mobile device (M) such as a cellular phone, wireless laptop, or wireless personal digital assistant (PDA). gNB 103 provides wireless broadband access to network 130 to multiple second UEs within coverage area 125 of gNB 103. The multiple second UEs include UE 115 and UE 116, and user stations (SS, such as UEs) 117, 118, and 119. In some embodiments, one or more of gNBs 101-103 may communicate with each other and UEs 111-116 using existing wireless communication technologies, and one or more of UEs 111-119 may communicate directly with each other (e.g., UEs 117-119) using other existing or proposed wireless communication technologies.

[0087] Depending on the network type, the term "base station" or "BS" can refer to any component (or set of components) configured to provide wireless access to a network, such as a transmitting point (TP), transceiver point (TRP), enhanced (or "evolved") base station (eNodeB or eNB), 5G base station (gNB), macro cell, femtocell, Wi-Fi access point (AP), or other wireless-capable device. A base station can provide wireless access according to one or more wireless communication protocols, such as 3GPP 5G New Radio (NR), Long Term Evolution (LTE), LTE-Advanced (LTE-A), High Speed ​​Packet Access (HSPA), Wi-Fi 802.11a / b / g / n / ac, etc. For convenience, various names for base station type devices and functions may be used interchangeably in this patent document to refer to network infrastructure components that provide wireless access to remote terminals. Furthermore, depending on the network type, the term "user equipment" (UE) can refer to any component such as a mobile station (MS), user station (SS), remote terminal, wireless terminal, receiving point, or user equipment. For convenience, various names for user equipment type devices and functions may be used interchangeably in this patent document to refer to remote wireless devices that wirelessly access the BS regardless of whether the UE is a mobile device (such as a mobile phone or smartphone) or is generally considered a fixed device (such as a desktop computer or vending machine).

[0088] The dashed lines indicate the approximate extent of coverage areas 120 and 125, which are shown as roughly circular for illustrative and explanatory purposes only. It should be clearly understood that coverage areas such as 120 and 125 associated with the gNB can have other shapes, including irregular shapes, depending on the configuration of the gNB and variations in the wireless environment associated with natural and man-made obstacles.

[0089] As described in more detail below, one or more of UEs 111-119 include circuitry, programming, or a combination thereof. In some embodiments, one or more of gNBs 101-103 include circuitry, programming, or a combination thereof.

[0090] although Figure 1 An example of a wireless network is shown, but more can be found on... Figure 1Various modifications can be made. For example, wireless network 100 can include any number of gNBs and any number of UEs in any suitable arrangement. Furthermore, gNB 101 can communicate directly with any number of UEs and provide those UEs with wireless broadband access to network 130. Similarly, each gNB 102-103 can communicate directly with network 130 and provide UEs with direct wireless broadband access to network 130. Additionally, gNBs 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.

[0091] Figure 2 An example base station according to an embodiment of the present disclosure is shown. Figure 2 The embodiment of gNB 102 shown is for illustrative purposes only, and Figure 1 gNBs 101 and 103 can have the same or similar configurations. However, gNBs come in a variety of configurations, and Figure 2 This disclosure is not intended to limit the scope to any particular implementation of gNB.

[0092] like Figure 2 As shown, gNB 102 includes multiple antennas 200a-200n, multiple radio frequency (RF) transceivers 201a-201n, transmit (TX) processing circuitry 203, and receive (RX) processing circuitry 204. gNB 102 also includes a controller / processor 205, a memory 206, and a backhaul or network interface 207.

[0093] RF transceivers 201a-201n receive incoming RF signals from antennas 200a-200n, such as signals transmitted by the UE in network 100. RF transceivers 201a-201n down-convert the incoming RF signals to generate intermediate frequency (IF) or baseband signals. The IF or baseband signal is sent to RX processing circuitry 204, which generates a processed baseband signal by filtering, decoding, and / or digitizing the baseband or IF signal. RX processing circuitry 204 sends the processed baseband signal to controller / processor 205 for further processing.

[0094] The TX processing circuit 203 receives analog or digital data (such as voice data, web data, email, or interactive video game data) from the controller / processor 205. The TX processing circuit 203 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. RF transceivers 201a-201n receive the processed baseband or IF signal from the TX processing circuit 203 and up-convert the baseband or IF signal into an RF signal transmitted via antennas 201a-201n.

[0095] The controller / processor 205 may include one or more processors or other processing devices that control the overall operation of the gNB 102. For example, the controller / processor 205 may control the reception of forward channel signals and the transmission of reverse channel signals by the RF transceivers 201a-201n, the RX processing circuit 204, and the TX processing circuit 203, according to known principles. The controller / processor 205 may also support additional functions, such as more advanced wireless communication functions.

[0096] For example, the controller / processor 205 can support beamforming or directional routing operations, where signals emitted from multiple antennas 200a-200n are weighted differently to effectively redirect the emitted signals in the desired direction. Any of a variety of other functions can be supported in the gNB 102 via the controller / processor 205.

[0097] The controller / processor 205 is also capable of executing programs and other processes, such as an operating system (OS), located in memory 206. The controller / processor 205 can move data into or out of memory 206 as needed by the executing process.

[0098] The controller / processor 205 is also connected to a backhaul or network interface 207. The backhaul or network interface 207 allows the gNB 102 to communicate with other devices or systems via a backhaul connection or over a network. Interface 207 can support communication via any suitable wired or wireless connection(s). For example, when the gNB 102 is implemented as part of a cellular communication system (such as a cellular communication system supporting 5G, LTE, or LTE-A), interface 207 can allow the gNB 102 to communicate with other gNBs via a wired or wireless backhaul connection. When the gNB 102 is implemented as an access point, interface 207 can allow the gNB 102 to communicate via a wired or wireless local area network or via a wired or wireless connection to a larger network (such as the Internet). Interface 207 includes any suitable structure that supports communication via wired or wireless connections such as Ethernet or RF transceivers.

[0099] Memory 206 is connected to controller / processor 205. A portion of memory 206 may include random access memory (RAM), and another portion of memory 206 may include flash memory or other read-only memory (ROM).

[0100] although Figure 2 An example of gNB 102 is shown, but it is possible to see more. Figure 2 Various changes can be made. For example, gNB 102 can include any number of Figure 2Each component is shown in the diagram. As a specific example, an access point may include multiple interfaces 207, and the controller / processor 205 may support routing functionality to route data between different network addresses. As another specific example, although shown as a single instance of TX processing circuitry 203 and a single instance of RX processing circuitry 204, gNB102 may include multiple instances of each (such as one per RF transceiver). For example, Figure 2 The various components can be combined, further subdivided, or omitted, and additional components can be added as needed.

[0101] Figure 3 An example user equipment according to an embodiment of the present disclosure is shown. Figure 3 The embodiment of UE 116 shown is for illustrative purposes only, and Figure 1 UEs 111-115 and 117-119 can have the same or similar configurations. However, UEs appear in multiple configurations, and Figure 3 This disclosure is not intended to limit the scope to any particular implementation of the UE.

[0102] like Figure 3 As shown, UE 116 includes an antenna 301, a radio frequency (RF) transceiver 302, a TX processing circuit 303, a microphone 304, and a receive (RX) processing circuit 305. UE 116 also includes a speaker 306, a controller or processor 307, an input / output (I / O) interface (IF) 308, a touchscreen display 310, and memory 311. Memory 311 includes an OS 312 and one or more applications 313.

[0103] RF transceiver 302 receives incoming RF signals transmitted by gNB of network 100 from antenna 301. RF transceiver 302 down-converts the incoming RF signals to generate IF or baseband signals. The IF or baseband signals are sent to RX processing circuitry 305, which generates processed baseband signals by filtering, decoding, and / or digitizing the baseband or IF signals. RX processing circuitry 305 sends the processed baseband signals to speaker 306 (e.g., for voice data) or processor 307 for further processing (e.g., for web browsing data).

[0104] TX processing circuit 303 receives analog or digital voice data from microphone 304 or other outgoing baseband data (such as web data, email, or interactive video game data) from processor 307. TX processing circuit 303 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. RF transceiver 302 receives the processed baseband or IF signal from TX processing circuit 303 and up-converts the baseband or IF signal into an RF signal transmitted via antenna 301.

[0105] Processor 307 may include one or more processors or other processing devices and executes OS 312 stored in memory 311 to control the overall operation of UE 116. For example, processor 307 may control the reception of forward channel signals and the transmission of reverse channel signals by RF transceiver 302, RX processing circuitry 305, and TX processing circuitry 303 according to known principles. In some embodiments, processor 307 includes at least one microprocessor or microcontroller.

[0106] Processor 307 is also capable of executing other processes and programs located in memory 311, such as processes for CSI reporting on the uplink channel. Processor 307 can move data into or out of memory 311 as needed for executing processes. In some embodiments, processor 307 is configured to execute application 313 based on OS 312 or in response to signals received from gNB or operator. Processor 307 is also coupled to I / O interface 309, which provides UE 116 with the ability to connect to other devices such as laptops and laptops. I / O interface 309 is the communication path between these accessories and processor 307.

[0107] The processor 307 is also connected to the touchscreen display 310. The user of the UE 116 can use the touchscreen display 310 to input data into the UE 116. The touchscreen display 310 can be a liquid crystal display, a light-emitting diode display, or other display capable of rendering text and / or at least limited graphics such as those from a website.

[0108] Memory 311 is connected to processor 307. A portion of memory 311 may include RAM, and another portion of memory 311 may include flash memory or other ROM.

[0109] although Figure 3 An example of UE 116 is shown, but it is possible to modify it. Figure 3 Make various changes. For example, Figure 3The various components can be combined, further subdivided, or omitted, and additional components can be added as needed. As a specific example, processor 307 can be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). Moreover, although... Figure 3 The UE116 is shown configured as a mobile phone or smartphone, but the UE can be configured to operate as other types of mobile or fixed devices.

[0110] With the rapid development of mobile communication technology, higher demands are being placed on network transmission speeds. During the deployment and development of 5G / 6G technologies, the advantages of high-frequency communication—large bandwidth and high speed—have been clearly demonstrated. However, this has also exposed problems such as high transmission loss, small coverage area, high power consumption, and high cost, particularly in millimeter wave and THz bands. These issues have, to some extent, limited the large-scale application of millimeter wave communication; currently, only a few countries offer services in the corresponding frequency bands.

[0111] The transmission distance of a signal is inversely proportional to the operating frequency. For the same base station transmit power and the same transmission distance, the higher the frequency of the transmitted signal, the greater the transmission path loss, and the weaker the signal strength received by the terminal. To achieve complete coverage of high-frequency signals in a cell, the base station transmit power can be increased or the base station construction density can be increased. However, the resulting sharp increase in equipment costs and base station energy consumption has become a major obstacle to the large-scale commercialization of high-frequency communication.

[0112] FWA (Fixed Wireless Access) is a technology that uses CPE (Customer Premises Equipment) to achieve broadband connectivity in relatively fixed locations by receiving and forwarding signals from mobile operators' base stations. FWA, which supports 5G technology, offers the potential for ultra-high speed, low latency, and high capacity for next-generation wireless connectivity. In addition to home users, FWA can provide cost-effective and convenient broadband access for small and micro-enterprises, shops, and temporary locations, and is gradually entering the industrial internet sector in scenarios such as factories, industrial parks, mines, and ports, providing high-speed, low-latency 5G connectivity for IoT terminals within a regional area.

[0113] In areas where fiber optic cables or other wired cables cannot be laid (due to cost, right-of-way, building protection, etc.), FWA can provide network access for users. It avoids the construction work of acquiring right-of-way, digging pipes, laying cables, and drilling into walls, significantly simplifying the network activation process, shortening the construction period, and saving costs. Therefore, for many operators, FWA is a means to rapidly expand their user base and a highly cost-effective business model. From a social perspective, FWA can help families in economically underdeveloped areas quickly gain internet access, enjoy the benefits of information technology, and improve their quality of life. Furthermore, in rural areas, FWA's main market, where population density is low, there is usually additional spectrum capacity available.

[0114] Figure 4 An example structural diagram of a CPE is shown. The example CPE device includes two parts: a receiving module 401 for communicating with a base station and a forwarding module 402 for communicating with other terminals, as follows. Figure 4 As shown. The receiving module 401 can function as a terminal communicating with the base station, receiving data from the base station or sending data to the base station. The signal forwarding module 402 functions similarly to a network hotspot, providing services to one or more terminals in a designated area, sending data obtained from the signal receiving module 401 to different terminals, or receiving information sent by different terminals and forwarding it to the base station through the signal receiving module 401. The signal forwarding module 402 is connected to the signal receiving module 401, sending uplink data to the signal receiving module or receiving downlink data obtained from the signal receiving module. The signal receiving module 401 and the signal forwarding module 402 can be two modules of the CPE, or two functions of one module. The connection between the base station and the signal receiving module 401 is wireless, while the connection between the signal forwarding module 402 and the terminal can be wired or wireless, such as via Ethernet cable, WiFi, mobile network, or fiber optic cable.

[0115] The inventors recognized that existing beam management processes do not fully utilize the relatively fixed positions of the CPE and base station in FWA-related communications. Simply using the existing beam management process to measure the reference signal for beam management results in inefficiencies for FWA communication systems. This invention proposes a method for communication between the CPE and the base station, referring to… Figures 5 to 14The method of the present disclosure embodiment is described. The present invention relates to the process of communication between the signal receiving module of the CPE and the base station. The receiving module 401 of the CPE communicating with the base station is usually installed in a fixed position such as a wall, pole, or roof. Therefore, the relative position and transmission path between the CPE and the base station change little, and the probability of connection interruption is low. Based on this information, the relevant processes of connecting with the base station (e.g., SSB reception and measurement, random access, beam management) can be simplified, connection time can be shortened, signaling overhead can be reduced, and resource utilization can be improved.

[0116] Figure 5 The diagram illustrates a terminal receiving an SSB. When the terminal has a data transmission requirement, it first performs initial access to obtain available wide beam pairs for transmission and reception. During this process, the base station's transmission beam carries a broadcast signal and periodically scans in different directions, transmitting SSBs (Synchronization Signal / PBCH Blocks). Different SSBs within a cycle are distinguished by their SSB index. The terminal's reception beam periodically attempts to receive signals in different directions, as follows: Figure 5 As shown, the terminal measures the received SSB. If the power measurement value RSRP (Reference Signal Receiving Power) of this SSB meets the threshold condition (e.g., RSRP > threshold power), the terminal considers the SSB to meet the transmission requirements. The terminal considers the beam pair consisting of the base station's transmitting beam corresponding to the SSB and the receiving beam used by the terminal when receiving the SSB to be the beam pair used for communication between the terminal and the base station. Therefore, the SSB is continuously and periodically transmitted. To ensure its complete coverage of the cell and considering the time required for multiple transmissions, the SSB uses a low-gain wide beam for transmission.

[0117] The synchronization information in the SSB (including PSS, Primary Synchronization Signal, and SSS, Secondary Synchronization Signal) contains cell physical ID (PCID). The system information in the broadcast channel (PBCH, physicalBoardcast Channel) of the SSB includes SSB index, RO (RACH occasions) location information, time and frequency resource information, etc. The terminal sends preamble information (also known as msg1) to the base station through the PRACH channel (physical random access channel) on the RO time and frequency resources associated with the SSB using the receiving beam used by the terminal, and uses the receiving beam to receive random access response information (RAR, random access response, also known as msg2) sent by the base station. If the UE successfully receives the random access response information from the base station, and the random access Radio Network Temporary Identifier (RA-RNTI) in this information matches, the terminal sends uplink information (msg3) to the base station based on the information carried in the received msg2. This information contains the terminal's identity information (TC-RNTI, Temporary cell RNTI). The base station, based on the received msg3 information, sends response information (msg4) containing the terminal's identity information to resolve contention among multiple users. The terminal attempts to receive msg4 on the PDSCH. If the identity information in the received msg4 matches the terminal's identity information, it determines that it has successfully accessed the base station and sends an ACK (Acknowledgement) message on the PUCCH (Physical Uplink Control Channel) to the base station. If the identity information in the received msg4 does not match the terminal's identity information, the terminal regenerates the preamble and repeats the process from msg1 to msg4 until it successfully receives a msg4 from the base station with matching identity information.

[0118] At this point, the base station uses a wide beam for communication with the terminal, resulting in low signal gain, short transmission distance, and low data transmission efficiency. To meet the high-speed transmission requirements, beam management is necessary after the terminal successfully accesses the base station. This involves measuring narrow beams to obtain high-gain narrow beam pairs for communication between the base station and the terminal. The base station transmits Channel State Information Reference Signals (CSI-RS) using different narrow beams, notifying the terminal of the time-frequency resources where this CSI-RS is located, the reporting content, and other information via specific signaling (e.g., CSI-Measconfig). The base station also configures the terminal to measure and report CSI-RS transmitted using different narrow beams (e.g., notifying the time of measurement reporting). The resources used by the narrow beams transmitted in different directions by the base station correspond to the CSI-RS index (CRI). The terminal only needs to report the measurement results of the CSI-RS on the specified time-frequency resources to enable the base station to determine the transmitting and / or receiving narrow beams used for communication between the base station and the terminal. The terminal can report CSI-RS identity information (e.g., CSI-RSindex) and corresponding measurement results (e.g., RSRP). The reported beams can be the beams corresponding to the top M CSI-RS with the highest measured power (M>0, and M is an integer, the value of M can be configured by other nodes).

[0119] In this invention, when the terminal type connected to the base station is a fixed wireless access related device (e.g., CPE), the changes in the communication beam transmission path between the base station and the CPE are relatively small, the probability of communication interruption is low, and the number of measurements of the transmission path signal transmission quality can be reduced, thereby reducing the associated signaling overhead. For example, the measurement cycle between two consecutive measurements for monitoring signal transmission quality can be lengthened, or the transmission path signal transmission quality can be not monitored at all. If the base station is not configured to monitor the transmission path signal transmission quality, it only needs to configure the measurement and reporting of CSI-RS for one round of beam management to determine narrow beam pairs. If a change in signal transmission quality causes the connection between the CPE and the base station to be interrupted, an access procedure is directly initiated to obtain a new available beam pair for communication with the base station. Alternatively, the narrow beam (e.g., the candidate beam measured and reported during random access) can be remeasured to determine a new narrow beam for communication, quickly completing beam recovery.

[0120] In some implementations, the terminal can determine which method to use for fast beam recovery based on the beam strength measurement results in the transmission direction.

[0121] In some implementations, the terminal determines the magnitude of environmental changes along the beam transmission path by comparing the change in beam strength measurement results with a specific threshold, thereby determining whether data transmission quality can be restored through new measurements. The new beam measurement may be a remeasurement of previously reported candidate beams, and a new communication beam is selected from these candidate beams based on the measurement results. When the beam transmission quality in the terminal's transmission direction deteriorates, the terminal can determine, based on the comparison results, whether it needs to resend a measurement request (e.g., an on-demand CSI-RS measurement request) to quickly restore the beam.

[0122] In some implementations, the terminal determines whether a new transmission beam can be quickly obtained through a new measurement by using the time difference between the time point when beam quality deteriorates and the time point when the candidate beam measurement results are obtained. For example, the terminal receives time window configuration information configured by the base station, which indicates the effective time window for its candidate beam measurement results and the start time of the time window. If the beam transmission failure occurs within this effective time window, it is considered that the terminal can quickly restore data transmission quality by requesting on-demand measurement.

[0123] If the configuration involves one-time CSI-RS measurement and measurement result reporting for the CPE, and corresponding non-periodic CSI-RS resource transmission and non-periodic measurement result reporting, in one implementation, the base station needs to send configuration signaling for configuring CSI-RS measurement resources and reporting content, and DCI (Downlink Control Information) for triggering the transmission of CSI-RS measurement and reporting.

[0124] According to embodiments of this disclosure, the CSI-RS measurement and reporting process for beam management can be combined with the random access process to reduce the signaling overhead of CSI-RS measurement and shorten the connection time between the terminal and the base station. When the terminal type is a CPE or other terminal with minimal spatial location variation, the CSI-RS measurement results at different times are similar due to the small changes in the transmission path. Therefore, only one CSI-RS measurement and reporting can be configured, significantly reducing the signaling overhead introduced by transmission quality monitoring and improving transmission efficiency.

[0125] This method is suitable for terminals with minimal location changes, such as CPEs, or terminals requiring low-latency, small-packet data transmission. Terminals can determine whether to perform narrow-beam measurements during random access to quickly obtain a high-gain communication beam, based on their own mobility characteristics and / or transmission requirements.

[0126] The method provided in this disclosure will be described in detail below using CPE as an example and in conjunction with exemplary embodiments.

[0127] Example 1

[0128] When a CPE knows its terminal type is CPE, it can send a CSI-RS measurement request to the base station during random access. This request requests the base station to configure resources for CSI-RS measurement and / or measurement result reporting for the CPE and sends the relevant configuration information for CSI-RS measurement resources and measurement result reporting to the CPE. Based on this method, the CPE can complete beam management based on CSI-RS measurements during random access, obtaining a high-gain narrow beam pair for communication between the base station and the CPE. This shortens the time it takes for the CPE to obtain the high-gain data transmission beam and improves the information transmission rate.

[0129] In this embodiment, the "CSI-RS measurement request information" can be sent in msg1 of the random access procedure. The CSI-RS measurement request information can be in the form of explicit indication information. For example, the CSI-RS measurement request information can be one bit or multiple bits of indication information. If one bit of indication information is used, "0" indicates that CSI-RS measurement is not requested, and "1" indicates that CSI-RS measurement is requested. If multiple bits of indication information are used, when all bits are 0, it indicates that the CPE does not request CSI-RS measurement, and the base station does not need to configure CSI-RS measurement-related resources and information. When all bits in the CSI-RS measurement request information received by the base station are 1, it indicates that the CPE requests CSI-RS measurement, and the base station needs to configure CSI-RS measurement-related resources and information. When all bits in the CSI-RS measurement request information received by the base station are values ​​other than all 0s and all 1s, the base station can perform other beam management-related actions according to the pre-agreed meaning of this information. For example, this information is used to determine whether CSI-RS measurement has been configured in this round of access, and the specific content of the CSI-RS measurement-related information configured by the base station. A detailed description will be given in the following Embodiment 2 in conjunction with the example of "N bits". The base station determines whether it needs to send CSI-RS related configuration information in subsequent signaling of random access based on whether the received msg1 contains CSI-RS measurement request information, and sends CSI-RS based on the configuration information. It also receives the measurement results of CSI-RS and adjusts the beam used for communication with CPE based on the measurement results.

[0130] Optionally, the CSI-RS measurement request information sent by the CPE to the base station can be represented implicitly. For example, the base station notifies the CPE of specific information and / or the CPE stores specific information before random access. This specific information may include, for example, a CPE-specific preamble or a CPE-specific random access RO. The base station determines whether the terminal sending the random access request msg1 is a CPE and / or whether the CPE requests CSI-RS measurement by receiving the specific information contained in msg1 sent by the terminal. This specific information (or CPE-specific information) can be agreed upon in advance between the base station and the terminal (including the CPE) and / or stored in the storage modules of the CPE and the base station, or it can be sent or indicated in the SSB's system information. This implicit form of CSI-RS measurement request does not require changes to the preamble sequence length and generation method, and has high compatibility with existing communication systems. When the base station determines that the terminal sending msg1 is a CPE or that the CPE is requesting CSI-RS measurement, it configures the CSI-RS measurement-related process for beam management. That is, the base station sends CSI-RS related configuration information to configure the terminal to measure and report the CSI-RS sent by the base station, and sends CSI-RS based on the configuration information, receives the measurement results of CSI-RS, and determines the narrow beam pair for communication with the CPE.

[0131] Optionally, the CPE-dedicated random access resources (RO, preamble, etc.) can be on-demand resources. For example, the resources can be activated with specific information and used in the CPE's random access process. In some embodiments, the CPE can obtain the relevant information required for activation (e.g., the activated dedicated preamble) through system information, and the base station can activate the resources by sending specific information (the base station can send activation signaling using the dedicated preamble before the CPE sends the random access PRACH).

[0132] The base station receives a random access request msg1 sent by the terminal and determines whether to configure CSI-RS measurement for the terminal based on the information in msg1. For example, if msg1 contains explicit and / or implicit CSI-RS measurement request information, the base station determines whether to send CSI-RS related configuration information to the CPE and sends the CSI-RS related configuration information. The configuration information includes at least one of the following: configuration information related to CSI-RS measurement, configuration information related to CSI-RS measurement result reporting, and triggering signaling (e.g., DCI triggering signaling) for CSI-RS measurement and measurement result reporting. The CSI-RS related configuration information may include at least one of the following: time-frequency location of CSI-RS measurement resources, content of CSI-RS measurement, resources for CSI-RS measurement result reporting, content of CSI-RS measurement result reporting, whether CSI-RS measurement is performed, CSI-RS measurement time T1, and CSI-RS measurement result reporting time T2. The configuration information related to CSI-RS measurements includes at least one of the following: the type of CSI-RS resource (e.g., periodic, semi-periodic, or aperiodic); the CSI-RS resource (NZP-CSI-RS (Non-Zero Power CSI-RS), CSI-IM (CSIInterference Measurement), CSI-SSB, or ZP-CSI-RS (Zero Power CSI-RS)); CSI-RS resource configuration information (or resource mapping information, such as the density of CSI-RS resources, time-domain and / or frequency-domain start positions, number of antenna ports, code division multiplexing type CDM (Code Division Multiplexing)); bandwidth information (BWP, Bandwidth Part); measurement content (RSRP, CRI, CQI (Channel Quality Indication), RI (rank)). The configuration information related to CSI-RS measurement result reporting includes at least one of the following: measurement result reporting type (periodic, semi-periodic, or aperiodic), measurement result reporting content (at least one of RSRP, CRI, CQI, RI, PMI); and DCI triggering signaling for CSI-RS measurement and measurement result reporting, including at least one of the following: indication information for whether to perform CSI-RS measurement (e.g., CSIrequest), CSI-RS measurement time T1 (or time offset T1), and CSI-RS measurement result reporting time T2 (or time offset T2).In one implementation, all or part of the information mentioned above can be obtained from parameters configured by other nodes (e.g., CSI measurement configuration configured via RRC (Radio Resource Control), such as CSI-MeasConfig), or stored in advance in the storage unit of the CPE.

[0133] Since the relative positions of the base station and CPE change little, the resource type in this CSI-RS related configuration information can be aperiodic CSI-RS (one-time CSI-RS measurement, where the base station only sends one set of signals for CSI-RS measurement). Correspondingly, the type of reported measurement results can also be aperiodic CSI-RS measurement result reporting, so as to reduce signaling overhead and improve resource utilization.

[0134] Optionally, to prevent the CPE from wasting time and signaling overhead due to failure to successfully receive a set of CSI-RS measurement signals sent by the base station within a specified time, the resource type in the CSI-RS related configuration information can be configured as half-cycle CSI-RS. The base station sends multiple sets of signals for CSI-RS measurement, with identical configuration information. The CPE only needs to measure and report the measurement result of the first receivable set of CSI-RS. The number of repetitions of half-cycle CSI-RS can be determined by considering factors such as signaling overhead and the time it takes for the CPE to receive the configuration signaling. The triggering signaling for CSI-RS measurement and / or measurement result reporting can be sent in msg2.

[0135] Optionally, after a CPE completes measuring a set of CSI-RS, it may stop measuring subsequent CSI-RS transmitted by the base station; or, after the base station receives a set of CSI-RS measurement results, it may not parse other measurement results reported by the same CPE during this round of random access.

[0136] The CSI-RS related configuration information can be sent from the base station to the CPE via msg2 during the random access process. The CPE can convert the MAC (Medium Access Control) layer information of the received msg2 into physical layer information and read the specific content of the CSI-RS related configuration information.

[0137] Optionally, the CSI-RS related configuration information sent by the base station to the CPE can be transmitted in the PDCCH (Physical Downlink Control Channel) via DCI information used to indicate msg2, shortening the reception time and reducing the amount of data that needs to be parsed at the physical layer. This DCI can indicate the time-frequency resource location at which the terminal receives msg2 from the base station.

[0138] Optionally, to reduce the signaling overhead of the CSI-RS related configuration information, some CSI-RS related configuration information and random access signaling can be merged. Alternatively, simplified configuration signaling (e.g., CSI-MeasConfig-CPE) dedicated to CSI-RS measurements can be designed for CPE beam management. Specifically, some information in the CSI-RS related configuration information can be pre-stored in the CPE, eliminating the need to carry the relevant content in the configuration signaling sent by the base station. For example, the CSI-RS measurement type is aperiodic or semi-periodic, the CSI-RS resource is NZP-CSI-RS, the measurement content is RSRP, the measurement result reporting type is aperiodic, and the measurement result reporting content is RSRP and CRI. The CSI-RS related configuration information can be simplified to CSI-RS related configuration signaling dedicated to CPE beam management, which includes at least one of the following: CSI-RS resource configuration information (e.g., density, time domain and / or frequency domain start position, number of antenna ports, CDM multiplexing type), bandwidth information (BWP), CSI-RS measurement time T1, and CSI-RS measurement result reporting time T2.

[0139] Optionally, multiple sets of CSI-RS related configuration information can be combined into a CSI-RS related configuration information set and sent to the CPE or stored in the CPE's storage module in advance. Alternatively, the indication information of the CSI-RS related configuration information (e.g., CSI-Measconfigindex) can be sent only in msg2. Based on the indication information of the CSI-RS related configuration information contained in msg2 sent from the base station, the CPE can determine the CSI-RS resource configuration and CSI-RS measurement result reporting configuration information used for this CSI-RS measurement, further reducing the signaling overhead for transmitting CSI-RS related configuration information.

[0140] Optionally, the specific content of the multiple sets of CSI-RS related configuration information can be sent in the system information (e.g., via SIB-CPE, where SIB-CPE represents a System Information Block (SIB) for CPE, and SIB-CPE may include multiple sets of CSI-RS related configuration information or CSI-RS related configuration information sets. It is understood that SIB-CPE can also be described using other names). When there is no CPE access requirement, to avoid signaling overhead caused by continuously broadcasting CPE-specific system information, the system information can be obtained in a non-broadcasting form, whereby the terminal actively requests the base station to send detailed information on demand. The terminal can request the base station to send system information by directly sending the system information request information, or by using a dedicated preamble based on information in the SSB to request the base station to send system information. For example, Figure 6 A schematic diagram illustrating the interaction between a CPE and a base station is shown. In one implementation, the SSB broadcast by the base station carries only the indication information of the SIB-CPE. Based on the indication information in the SSB, the CPE requests the base station to send multiple sets of CSI-RS related configuration information contained in the specific SIB-CPE. The CPE can determine the CSI-RS related configuration information to be used in this measurement based on the indication information of the CSI-RS related configuration information sent by the base station.

[0141] Optionally, the system information sent by the base station can be sent in msg2 or msg4 of the random access procedure to reduce signaling overhead.

[0142] like Figure 6 As shown, during the interaction between the CPE and the base station (e.g., gNB), in step 601, the CPE sends message 1 (MSG1) and an SIB-CPE request to the base station. The SIB-CPE request is used to request SIB-CPE, such as a set of CSI-RS related configuration information, from the base station. In one implementation, the SIB-CPE request can be sent through message 1, or it can be sent separately from message 1.

[0143] In step 602, the base station sends message 2 (MSG2) and indication information of CSI-RS related configuration information to the CPE. The indication information is used to indicate the configuration information in the CSI-RS related configuration information set.

[0144] In step 603, in response to the SIB-CPE request sent by the CPE, the base station sends the requested SIB-CPE information to the CPE, which includes a set of CSI-RS related configuration information. Step 603 can be performed before or after step 602, or it can be performed substantially simultaneously.

[0145] In one implementation, the CPE can obtain a dedicated preamble corresponding to the SIB-CPE information used to request on-demand based on the system information carried in the SSB. In another implementation, the dedicated preamble used to request the SIB-CPE information can be identical to the dedicated preamble used to request CSI-RS measurements. (See below.) Figure 6 As shown, if this on-demand SIB-CPE information request is sent in the random access procedure msg1, for example, by using a dedicated preamble to indicate the SIB-CPE request information, when the base station receives msg1 sent by a terminal using this dedicated preamble, it can determine that the terminal type is CPE, and directly send CSI-RS related configuration indication information for beam management and SIB-CPE information containing a set of CSI-RS related configuration information to send the CPE request in msg2. Based on the received two pieces of information, the CPE determines a set of CSI-RS related configuration information containing multiple CSI-RS related configuration information, and determines the CSI-RS related configuration used for this CSI-RS measurement according to the indication information of the CSI-RS related configuration information. The sending order of msg2 and SIB-CPE is not limited; the requested SIB-CPE information can be sent before or after msg2.

[0146] Optionally, to further simplify the content of the CSI-RS related configuration information, some parameters in the configuration information can be fixed, such as the density, time-domain and / or frequency-domain start position, number of antenna ports, CDM multiplexing type, etc. in the CSI-RS resource configuration information. The fixed configuration information can be sent in advance or stored in the storage module of the CPE in advance.

[0147] Optionally, in some cases, an SSB corresponds to only one set of fixed CSI-RS related configuration information. The CPE can determine the CSI-RS related configuration information used for CSI-RS measurement based on the SSB identification information (SSBID) obtained during initial access. The base station does not need to send additional CSI-RS related configuration information indication information, further reducing signaling overhead.

[0148] The CPE successfully receives msg2 and obtains the CSI-RS related configuration information contained in msg2, including and / or indicated by it, to determine the time, resources, type, and other information for CSI-RS measurement and / or measurement result reporting. The base station sends CSI-RS resources for measurement a certain period after sending msg2. Based on the obtained CSI-RS configuration information, the CPE, starting at time T1 after receiving msg2, measures CSI-RS at the time-frequency resource location indicated by the base station and obtains the measurement result. The measurement result includes one or more measured CSI-RS reference signal power values ​​(RSRP) and corresponding CSI-RS indication information (CSI-RS index, CRI). The time T1 for the CPE to receive and measure the CSI-RS sent by the base station can be sent in msg2 or stored as a fixed value in advance in both the base station and the CPE. The time T1 (or time offset T1) for the CPE to perform CSI-RS measurement configured by the base station can be calculated from the time the base station sends msg2, or from the time the base station sends the request to the SIB-CPE. The value of time T1 is related to factors such as the signal transmission distance between the base station and the CPE, and the CPE signal reception and data parsing time.

[0149] The CPE reports the measurement results via msg3 based on the obtained CSI-RS measurement results and the CSI-RS non-periodic reporting configuration information in the CSI-RS related configuration information sent by the base station. In this embodiment, after receiving msg2, the CPE can perform CSI-RS measurement according to the configuration information carried and / or indicated by msg2 and send the measurement results to the base station via msg3. The base station does not need to additionally notify the CPE of the CSI-RS measurement result reporting time T2, thus reducing signaling overhead. The content of the CSI-RS measurement results includes at least one of the following: CSI-RS identification information (CRI), measured power value, and the number of CSI-RS included in the measurement results can be one or more. For example, to reduce signaling overhead, the CPE can only report the beam with the largest RSRP value among the measured CSI-RS to determine the narrow beam pair for establishing communication with the base station. In this case, only its CRI needs to be reported. Alternatively, the CPE can report the CRI and power values ​​corresponding to the M beams with the highest RSRP values ​​in the measured CSI-RS. The beam with the highest power value is used for communication with the base station, while the other M-1 beams serve as backup beams to handle beam recovery in case of signal quality degradation due to minor changes in the transmission environment. Optionally, the reported power values ​​of the other M-1 beams can be their absolute power values, or the difference between the power value and the maximum value, to reduce the impact of quantization errors when reporting power values.

[0150] Using this method, the CPE can complete CSI-RS measurements during random access, quickly obtaining the narrow beam pair for communication with the base station, reducing signaling overhead and the waiting time from access to using the narrow beam to improve transmission efficiency. Simultaneously, the base station can send the narrow beam information for communication with the CPE, determined by msg3, to higher layers for configuration as early as possible, reducing the waiting time required for higher-layer configuration. In some cases, the base station can use the measured narrow beam to send information as early as msg4, improving data transmission efficiency.

[0151] Figure 7 A schematic diagram illustrating the interaction between the CPE and the base station is shown below. Figure 7 An example implementation is given to illustrate the above process.

[0152] like Figure 7 As shown, during the initial access phase, the interaction process between the CPE and the base station may include the following steps:

[0153] In step 701: The CPE sends message 1 (MSG1) and a CSI-RS measurement request to the base station (e.g., gNB). The CSI-RS measurement request can be sent via message 1 or sent separately from message 1.

[0154] In response to the CSI-RS measurement request sent by the CPE, in step 702, the base station sends message 2 (MSG2) and CSI-RS configuration information to the CPE. The CSI-RS configuration information can be sent through message 2 or sent separately from message 2.

[0155] Based on the CSI-RS configuration information, in step 703, the base station sends CSI-RS to the CPE, such as a non-periodic CSI-RS;

[0156] Based on the CSI-RS configuration information, the CPE measures the CSI-RS on the corresponding resources (e.g., time and / or frequency resources), and sends message 3 (MSG3) and the CSI-RS measurement result to the base station in step 704. The CSI-RS measurement result can be sent through message 3 or sent separately from message 3.

[0157] Based on the CSI-RS measurements transmitted by the CPE, the base station can determine the narrow beam used for communication with the CPE.

[0158] After the CPE successfully connects to the base station, the CPE and the base station can transmit data through a defined narrow beam.

[0159] Optionally, in step 705, the base station can send message 4 (MSG4) to the CPE through a defined narrow beam.

[0160] The CPE actively requests the base station to configure aperiodic CSI-RS measurements, enabling the CPE to perform CSI-RS measurements and report in parallel during random access, quickly obtaining a high-gain narrow beam for communication with the base station. During the initial access process, the CPE receives periodic SSBs sent by the base station, obtaining beams whose received power values ​​meet the transmission conditions (RSRP > threshold). The CPE then considers the transmitting beam corresponding to that SSB and the receiving beam used by the CPE when receiving that SSB to form a wide beam pair for initial access communication between the CPE and the base station. The CPE initiates the random access procedure based on the information carried and indicated in the SSBs sent by the base station. The CPE carries CSI-RS measurement request information in msg1 sent to the base station, for example, using a preamble sent using CPE-dedicated RO resources. After sending msg1, the CPE attempts to receive the random access response information (msg2) sent by the base station on the same time-frequency resources used in msg1, and obtains the CSI-RS related configuration information required for CSI-RS measurement corresponding to the CSI-RS measurement request information sent by the base station in msg2. Based on the obtained CSI-RS configuration information, after receiving msg2 at time T1, the CPE performs CSI-RS measurements at the specified time-frequency resource locations according to the resource-related information in the CSI-RS configuration information. The CPE measures the Reference Signal Power (RSRP) values ​​for different CSI-RS time-frequency resource locations. The CPE reports relevant information based on the measurement results in the CSI-RS configuration information, including the measurement results in msg3 to the base station. For example, the CPE reports the CSI-RS Identifier (CRI) information corresponding to the time-frequency resource with the highest measured power. Based on the measurement results reported by the CPE, the base station can determine the narrow beam for communication with the CPE. When sending msg4, the base station can use this determined narrow beam, and correspondingly, the CPE can receive information transmitted by the base station using the narrow beam determined by the measurement results (e.g., CSI-RS Identifier) ​​reported in msg3.

[0161] Considering the contention issue between different CPEs, a CPE can only successfully access the base station if it successfully receives msg4 from the base station and the identity information contained in msg4 matches the CPE's identity information. If the CPE fails to connect to the base station during the first attempt (i.e., it successfully receives msg4 but the identity information in the received msg4 does not match the CPE's identity information), the CPE needs to switch the preamble and retransmit msg1. In the next access process, the CPE can continue to request CSI-RS measurements to address changes in measurement results caused by changes in the transmission environment. This method only requires configuring a specific preamble or RO resource for CSI-RS requests, imposes minimal restrictions on other terminals, and does not significantly reduce the likelihood of other terminals successfully accessing the base station.

[0162] Optionally, if the CPE includes CSI-RS request information in every msg1 sent, the signaling overhead required for CSI-RS measurement increases, and the waiting time grows. Therefore, the CPE can be configured not to carry CSI-RS request information when sending msg1 for the second time, meaning that only one CSI-RS measurement is completed during the CPE's successful access to the base station. For example, the CPE can use a non-CPE-specific preamble and / or send the preamble on a non-CPE-specific RO when sending the preamble in the second round, or it can use a preamble specifically for not requesting CSI-RS measurement from the CPE-specific preamble, or it can send the preamble on a RO specifically for not requesting CSI-RS measurement from the CPE-specific RO. When the base station receives the preamble sent by the CPE or the preamble sent on this RO, it does not need to configure CSI-RS measurement. Alternatively, the CPE can adjust the CSI-RS measurement request information carried in msg1 from "1" (indicating a request for CSI-RS measurement) to "0" (indicating no request for CSI-RS measurement or that CSI-RS measurement has been completed).

[0163] Optionally, when the base station receives msg1 carrying a CSI-RS measurement request sent by the CPE, it can first determine whether the CPE has completed the CSI-RS measurement process to avoid the time and signaling overhead introduced by repeated measurements. Figure 8 An example flowchart of the method executed by CPE is shown. For example, in the following... Figure 8 In the illustrated embodiment, the CPE can choose whether to request CSI-RS measurement configuration from the base station by using different preambles. For example... Figure 8As shown, firstly, in step 801, the CPE determines the RO time-frequency resources used to send msg1 based on the SSB selected during initial access. In step 802, it determines whether it is necessary to request the base station to configure CSI-RS measurement. If it is determined that it is not necessary to request the base station to configure CSI-RS measurement, then in step 804, it determines to send msg1 using a preamble other than the preamble used to request on-demand SIB-CPE. If it is determined in step 802 that it is necessary to request the base station to configure CSI-RS measurement, then in step 805, it determines to send msg1 using the on-demand SIB-CPE-specific preamble carried and / or indicated in the SSB's system information to request the base station to send the specific content of SIB-CPE through PDSCH. In step 806, the CPE sends message 1 (msg1) using the determined preamble. In one implementation, if the method determines in step 802 that a CSI-RS measurement request is needed, it may further include determining in step 803 whether the CPE has completed the CSI-RS measurement. If the determination result is yes, the method proceeds to step 804: determining to send msg1 using a preamble other than the preamble used to request on-demand SIB-CPE; otherwise, proceeding to step 805: determining to send msg1 using the on-demand SIB-CPE-specific preamble carried and / or indicated in the SSB's system information. For example, if the identity information contained in msg4 received by the CPE in this round of random access is inconsistent with the CPE's identity information, i.e., the CPE has not successfully competed, the CPE can use a preamble other than on-demand SIB-CPE to send msg1 in the next round of preamble switching. This prevents repeated requests and configurations of SIB-CPE and CSI-RS measurements during multi-round access competition, shortens connection time, and reduces signaling overhead.

[0164] Example 2

[0165] When a CPE knows its terminal type is CPE, it can send a CSI-RS measurement request to the base station during random access. The request asks the base station to configure resources for CSI-RS measurements and / or measurement result reporting for that CPE and sends the relevant configuration information for CSI-RS measurement resources and measurement result reporting to the CPE. Based on this method, the CPE can complete beam management based on CSI-RS measurements during random access, obtaining a high-gain narrow beam pair for communication between the base station and the CPE. This shortens the time it takes for the CPE to obtain a beam for high-gain data transmission and improves the information transmission rate.

[0166] In this embodiment, the "CSI-RS measurement request information" can be sent in msg3 during the random access procedure. This method does not restrict the preamble and / or RO resources used when sending msg1. The increased availability of preamble and / or RO resources for other terminals (ordinary UEs and / or CPEs that do not use dedicated resources) reduces the probability of contention failure and minimizes the impact on other terminals. The CSI-RS measurement request information can be in the form of explicit indication information. For example, the CSI-RS measurement request information can be a 1-bit indication, where "0" indicates no request for CSI-RS measurement configuration and "1" indicates a request for CSI-RS measurement configuration. Based on the CSI-RS measurement request information received in msg3, the base station determines whether to send CSI-RS related configuration information in subsequent signaling during random access, sends CSI-RS based on this configuration information, receives the CSI-RS measurement results, and adjusts the beam used for communication with the CPE based on the measurement results.

[0167] Optionally, the CSI-RS measurement request information sent by the CPE to the base station can be represented in an implicit form. For example, the CSI-RS measurement request information sent by the CPE can be represented by multiple bits, such as using an N-bit number or field (e.g., CSI-RS request-CPE), where the value of N can be obtained by configuration of other nodes (e.g., RRC). For example, when all bits in the CSI-RS measurement request information (the aforementioned N-bit information) received by the base station are 0, it indicates that the CPE does not request CSI-RS measurement, and the base station does not need to configure CSI-RS measurement-related resources and information. When all bits in the CSI-RS measurement request information received by the base station are 1, it indicates that the CPE requests CSI-RS measurement, and the base station needs to configure CSI-RS measurement-related resources and information. When the CSI-RS measurement request information received by the base station is any value other than all 0s and all 1s, the base station can perform other beam management-related actions according to the pre-agreed meaning of this information. For example, this information is used to determine whether CSI-RS measurement has been configured in this round of access, and the specific content of the CSI-RS measurement-related information configured by the base station. The various schemes described in this embodiment in conjunction with N-bit information can also be similarly applied to the case of multiple bits requesting CSI-RS measurement sent through message 1 in Embodiment 1.

[0168] Optionally, the CSI-RS measurement request information, besides all 0s and all 1s, can also be used to indicate other information. For example, in the example in Table 1 below, the CSI-RS request-CPE is represented by a 3-bit value (N=3). 000 indicates that CSI-RS measurement configuration for the CPE is not required, 111 indicates that the base station needs to configure CSI-RS measurement for the CPE, and other values ​​from 001 to 110 are pre-defined for other beam management-related behaviors, such as representing the CSI-RS index corresponding to the narrow beam recommended by the CPE. The base station determines the resources and information related to the configured CSI-RS measurement based on this information. The CSI-RS index can be a beam stored in advance by the CPE, such as the narrow beam used in the early stages of communication with the base station. The base station can reduce the number of beams for CSI-RS measurement based on this index (for example, a wide beam of an SSB corresponds to 40 narrow beams, and this method can reduce the number of beams to be measured to 10), reducing the time and resources required for measurement. Alternatively, the CSI-RS index can be the narrow beam determined by the CPE in the first round of CSI-RS measurement during multi-round contention. Upon receiving this information, the base station can determine that the CPE has completed the CSI-RS measurement without needing to reconfigure the CSI-RS measurement, thus reducing the overhead of CSI-RS configuration signaling and CSI-RS measurement result reporting. The number of bits N in the CSI-RS measurement request information is related to the number of CSI-RS narrow beams included in each SSB, and 2^N must be no less than the total number of narrow beams corresponding to each SSB.

[0169] CSI-RS request-CPE meaning 000 No CSI-RS measurement configuration required 001-110 Recommended narrow beam corresponding CRI 111 CSI-RS measurement needs to be configured.

[0170] Table 1

[0171] The base station receives random access information msg3 sent by the terminal and determines whether msg3 includes CSI-RS measurement request information. If it determines that msg3 contains explicit and / or implicit CSI-RS measurement request information, the base station configures CSI-RS measurement for beam management. The base station can send CSI-RS related configuration information to the CPE, which includes at least one of the following: configuration information related to CSI-RS measurement, configuration information related to CSI-RS measurement result reporting, and DCI triggering signaling for CSI-RS measurement and measurement result reporting. For example, the CSI-RS related configuration information may include at least one of the following: the time-frequency location of the CSI-RS measurement resource, the content of the CSI-RS measurement, the resource for CSI-RS measurement result reporting, the content of the CSI-RS measurement result reporting, whether CSI-RS measurement is performed, the time T1 of the CSI-RS measurement, and the time T2 of the CSI-RS measurement result reporting. The configuration information related to CSI-RS measurements includes at least one of the following: the type of CSI-RS resource (periodic, half-periodic, aperiodic), the resources of CSI-RS (NZP-CSI-RS, CSI-IM, CSI-SSB, ZP-CSI-RS), the resource configuration information of CSI-RS (e.g., density, time-domain and / or frequency-domain start position, number of antenna ports, CDM multiplexing type), bandwidth information (BWP), and measurement content (RSRP, CRI, CQI, RI, PMI); the configuration information related to CSI-RS measurement result reporting includes at least one of the following: the type of measurement result reporting (periodic, half-periodic, aperiodic), and the content of the measurement result reporting (RSRP, CRI, CQI, RI, PMI); the DCI trigger signaling for CSI-RS measurement and measurement result reporting includes at least one of the following: indication information on whether to perform CSI-RS measurement (CSI... The information includes the request, the time T1 of the CSI-RS measurement (or time offset T1), and the time T2 of the CSI-RS measurement result reporting (or time offset T2). All or part of the above information can be obtained from parameters configured by other nodes (e.g., CSI-MeasConfig configured in RRC), or pre-stored in the CPE's storage unit. The CSI-RS related configuration information can be sent from the base station to the CPE via msg4 during the random access process. Because msg4 is transmitted on the PDSCH, there are fewer restrictions on the configuration signaling content, and there is no need to send specific CSI-RS related configuration information through other methods.

[0172] Since the relative positions of the base station and CPE change little, the resource type in this CSI-RS related configuration information can be aperiodic CSI-RS (one-time CSI-RS measurement, the base station only sends one set of CSI-RS measurement signals). Correspondingly, the type of reported measurement results is also aperiodic CSI-RS measurement result reporting, so as to reduce signaling overhead and improve resource utilization.

[0173] Optionally, to prevent the CPE from wasting time and signaling overhead by failing to successfully receive a set of CSI-RS measurement signals sent by the base station within a specified time, the resource type in the CSI-RS configuration information can be configured as half-cycle CSI-RS. The base station sends multiple sets of signals for CSI-RS measurement with identical configuration information; the CPE only needs to measure and report the measurement result of the first receivable set of CSI-RS. The number of repetitions of half-cycle CSI-RS needs to take into account factors such as signaling overhead and the time it takes for the CPE to receive the configuration signaling. The CSI-RS triggering signaling can be sent in msg4.

[0174] Optionally, after a CPE completes a set of CSI-RS measurements, it may stop measuring subsequent CSI-RS reports sent by the base station; or, after a base station receives a set of CSI-RS measurement results, it may not parse other measurement results reported by the same CPE during this round of random access.

[0175] Optionally, to reduce the signaling overhead of the CSI-RS related configuration information, some CSI-RS related configuration information and random access signaling can be merged, or simplified configuration signaling (e.g., CSI-MeasConfig-CPE) can be designed specifically for aperiodic CSI-RS measurements used for beam management. Specifically, some information in the CSI-RS related configuration information can be pre-stored in the CPE, eliminating the need to carry this content in the configuration signaling sent by the base station. For example, the CSI-RS resource type is aperiodic, the CSI-RS resource is NZP-CSI-RS, the measurement content is RSRP, the measurement result reporting type is aperiodic, and the measurement result reporting content includes RSRP and CRI. The CSI-RS related configuration information can be simplified to CSI-RS related configuration signaling dedicated to CPE beam management, which includes at least one of the following: CSI-RS resource configuration information (e.g., density, time domain and / or frequency domain start position, number of antenna ports, CDM multiplexing type), bandwidth information (BWP), CSI-RS measurement time T1, and CSI-RS measurement result reporting time T2.

[0176] Optionally, to further simplify the content of the CSI-RS related configuration information, some parameters in the configuration information can be fixed, such as the density, time-domain and / or frequency-domain start position, number of antenna ports, CDM multiplexing type, etc. in the CSI-RS resource configuration information. The fixed configuration information can be sent in advance or stored in the storage module of the CPE in advance.

[0177] Optionally, in some cases, an SSB corresponds to only one fixed set of CSI-RS related configuration information. The base station sends a set (or group) containing multiple configuration information, the contents of which correspond one-to-one with the SSB index. The CPE can determine the CSI-RS related configuration information used for CSI-RS measurement based on the SSB identifier information (SSBID) obtained during initial access, without needing to receive separate indication information for CSI-RS related configuration information. In this case, the CSI-RS related configuration information group containing multiple CSI-RS related configuration information configured to the base station by the higher layer at one time can simultaneously serve multiple CPEs located in different SSBs.

[0178] Optionally, multiple sets of CSI-RS related configuration information can be combined into a CSI-RS related configuration information set and sent to the CPE or stored in the CPE's storage module in advance. Alternatively, the indication information of the CSI-RS related configuration information (e.g., CSI-Measconfigindex) can be sent only in msg4. Based on the indication information of the CSI-RS related configuration information contained in msg4 sent from the base station, the CPE can determine the CSI-RS resource configuration and CSI-RS measurement result reporting configuration information used for this CSI-RS measurement, further reducing the signaling overhead for transmitting CSI-RS related configuration information.

[0179] Optionally, the indication information of the CSI-RS related configuration information can be sent in the DCI configuration of msg4. The DCI information is used to indicate the time-frequency resource location information of terminal msg4 in PDSCH.

[0180] Optionally, the specific content of the multiple sets of CSI-RS related configuration information can be sent in system information (e.g., SIB-CPE). When there is no CPE access requirement, to avoid signaling overhead caused by continuously broadcasting CPE-specific system information, the system information can be obtained in a non-broadcasting manner. The terminal actively requests the base station to send detailed information on demand. That is, the broadcast SSB only carries the indication information of SIB-CPE. Based on the indication information in the SSB, the CPE requests the base station to send the multiple sets of CSI-RS related configuration information contained in the specific SIB-CPE. The CPE can determine the CSI-RS related configuration information to be used in this measurement based on the indication information of the CSI-RS related configuration information sent by the base station. Figure 9 A schematic diagram illustrating the interaction between a CPE and a base station is shown below. Figure 9 As shown, the interaction between the CPE and the base station includes the following steps:

[0181] Step 901: The CPE sends message 3 and an SIB-CPE request to the base station (e.g., gNB). The SIB-CPE request is used to request the base station to send SIB-CPE (including a set of CSI-RS related configuration information). The SIB-CPE request can be sent through message 3 or sent separately from message 3.

[0182] Step 902: The base station sends message 4 and indication information related to CSI-RS configuration information to the CPE. This indication information can be sent through message 4 or sent separately from message 4.

[0183] In response to the SIB-CPE request, in step 903: the base station sends the requested SIB-CPE information to the CPE. Step 903 can be performed before or after step 902, or they can be performed substantially simultaneously.

[0184] According to the embodiment, the on-demand SIB-CPE information request is sent in the random access procedure msg3. That is, the CPE carries the system information (SI) type it needs to read in MSG3. When the base station receives the request information sent by the CPE, it sends detailed SIB-CPE information containing a set of CSI-RS related configuration information as part of the CPE request. Based on the received two pieces of information, the CPE determines a set of CSI-RS related configuration information containing multiple CSI-RS related configuration details, and determines the CSI-RS related configuration to be used for this CSI-RS measurement according to the CSI-RS related configuration indication information. The sending order of msg4 and SIB-CPE is not limited; the requested SIB-CPE information can be sent before or after msg4.

[0185] The CPE successfully receives msg4 and obtains the CSI-RS related configuration information contained in msg4, including and / or indicating it, to determine the time, resources, type, etc., of CSI-RS measurement and / or measurement result reporting. The base station sends the CSI-RS resources for measurement at a corresponding time after sending msg4. Based on the obtained CSI-RS configuration information, the CPE, starting at time T1 after receiving msg4, measures CSI-RS at the time-frequency resource location indicated by the base station and obtains the measurement result. The measurement result includes one or more measured CSI-RS reference signal power values ​​(RSRP) and corresponding CSI-RS indication information (CSI-RS index, CRI). The time T1 for the CPE to receive and measure the CSI-RS sent by the base station can be sent in msg4 or stored as a fixed value in advance in the base station and CPE. The time T1 (or time offset T1) for the CPE to perform CSI-RS measurement configured by the base station can be calculated from the time of receiving msg2 sent by the base station, or from the time of receiving the request from the SIB-CPE sent by the base station. The value of time T1 is related to factors such as the signal transmission distance between the base station and the CPE, and the CPE signal reception and data parsing time.

[0186] The CPE reports the measurement results based on the obtained CSI-RS measurement results and the relevant configuration information in the CSI-RS related configuration information sent by the base station. The CSI-RS measurement results are transmitted in the CPE's uplink channel, for example, in PUSCH and / or PUCCH. In this embodiment, after receiving msg4, the CPE can perform CSI-RS measurements according to the configuration information carried and / or indicated in msg4 and send the measurement results to the base station. The CSI-RS measurement results include at least one of the following: CSI-RS identification information (CRI), measured power value, and the number of CSI-RS included in the measurement results can be one or more. For example, the CPE can report the CRI and power values ​​corresponding to the M beams with the largest RSRP values ​​in the measured CSI-RS, where the beam with the largest power value is used for communication with the base station, and the other M-1 beams are used as backup beams to cope with beam recovery after signal transmission quality deterioration caused by changes in the transmission environment.

[0187] Optionally, the power reporting format in the CSI-RS measurement results can include the absolute power value of the largest RSRP, and the other M-1 measured power values ​​can be their absolute power values, or the difference between the power values ​​and the maximum value, in order to reduce the impact of quantization error when reporting power values.

[0188] Optionally, to reduce signaling overhead, the CPE may only report the beam with the largest RSRP value in the measured CSI-RS, which is the narrow beam pair used to establish communication with the base station. For example, it may report the CSI-RS beam identification information CRI with the largest power value and the corresponding RSRP value, or only report the CSI-RS beam identification information CRI with the largest power value.

[0189] For example, the CSI-RS measurement result report information can be sent to the base station in the PUCCH along with the ACK information fed back by the CPE after successfully completing random access. This uplink information constitutes Msg5 of the random access procedure. Based on this method, the CPE only reports the CSI-RS measurement result once upon successfully accessing the base station, avoiding the signaling overhead introduced by repeatedly reporting measurement results during multiple rounds of contention. In this case, the base station does not need to additionally notify the CPE of the CSI-RS measurement result reporting time T2, reducing signaling overhead. Simultaneously, the base station does not need to reserve resources for measurement result reporting in each round of random access, and the related DCI resource triggering signaling for reporting measurement results does not need to be sent additionally.

[0190] Optionally, to reduce the signaling overhead of this msg5 to PUCCH, it can be configured to only report the CRI corresponding to the beam with the largest measured RSRP value when reporting CSI-RS measurement results.

[0191] Figure 10 A schematic diagram illustrating the interaction between the CPE and the base station is shown below. Figure 10 An example embodiment is provided to illustrate the process associated with the method of reporting CSI-RS measurement results based on msg5.

[0192] like Figure 10 As shown, in the initial result process, in step 1001, the CPE sends message 1 (Msg1) to the base station (e.g., gNB); in step 1002, the base station sends Msg2 to the CPE; in step 1003, the CPE sends Msg3 and a CSI-RS measurement request to the base station, which can be sent via msg3 or separately from msg3; in step 1004, the base station sends msg4 and CSI-RS related configuration information to the CPE; in step 1004, based on the CSI-RS configuration information, the base station sends CSI-RS (e.g., aperiodic CSI-RS) to the CPE on the corresponding resources (e.g., time and / or frequency resources); the CPE measures CSI-RS based on the received CSI-RS related configuration information and sends msg5 in step 1006, which can carry an acknowledgment (ACK) of message 4 and the CSI-RS measurement result.

[0193] Using the obtained CSI-RS measurements, the base station can perform beam management to obtain a narrow beam for communication with the CPE. After random access is completed, the base station and the CPE can use the determined narrow beam for data transmission.

[0194] In this embodiment, the CPE actively sends an aperiodic CSI-RS measurement request message to the base station via msg3 and attempts to receive msg4 sent by the base station. msg4 carries CSI-RS related configuration information determined and / or sent by the base station based on the received CSI-RS request message. After successfully receiving msg4 and successfully parsing to obtain the CSI-RS related configuration information, the CPE performs CSI-RS measurement at the specified time-frequency resource location after receiving msg4 at time T1, according to the CSI-RS related configuration information sent by the base station. The CPE measures the Reference Signal Power (RSRP) values ​​for different CSI-RS time-frequency resource locations. Based on the measurement results in the CSI-RS related configuration information, the CPE reports relevant information to the base station, such as the CSI-RS Identifier (CRI) information corresponding to the time-frequency resource with the highest measured power. If the identity information contained in msg4 received by the CPE matches the CPE's identity information, the CPE has successfully competed for access. The CPE then reports the successful access ACK information and CSI-RS measurement results to the base station via PUCCH through msg5. If the identity information contained in msg4 received by the CPE does not match the CPE's identity information, the CPE has failed to compete for access. The CPE re-executes the msg1-msg4 process until it succeeds in competing for access or the number of rounds of executing msg1-msg4 reaches its maximum value (e.g., 10 rounds, this value is configured by higher layers). Based on this method, the CPE completes CSI-RS measurements for beam management simultaneously during random access. In subsequent data transmission, the high-gain narrow beam obtained through CSI-RS measurements can be directly used, increasing transmission efficiency.

[0195] Optionally, the CSI-RS measurement results can also be transmitted in the PUSCH. The base station can send third information (e.g., the content of DCI information, such as DCI 0_0 and DCI 0_1) to indicate the resources used for reporting the measurement results, scheduling resources for reporting CSI-RS measurement results, such as PUSCH resources. The third information can be combined and transmitted in msg4 to reduce signaling transmission overhead. Using the PUSCH to transmit CSI-RS measurement results allows for the transmission of more detailed measurement result data, including the measured power values ​​(RSRP) of one or more CSI-RS and their corresponding identification information (CRI). This large amount of reported data can be used by the base station for more accurate communication beam selection, beam recovery, and other processes.

[0196] Alternatively, in one implementation, the DCI information used by the base station to schedule the resources for reporting CSI-RS measurement results can be sent after the base station receives the ACK information for successful random access. Figure 11A and Figure 11B A schematic diagram illustrating the interaction between the CPE and the base station is shown. For example... Figure 11A As shown, after receiving msg4, which matches its identity information, the CPE successfully accesses the base station and sends an ACK message indicating successful access to the base station in step 1101. Based on the received ACK message, the base station schedules resources for the CPE to report CSI-RS measurement results and sends DCI information for scheduling these resources in step 1102. Based on the information contained in the received DCI, the CPE reports the measurement results on the specified PUSCH resource at the time specified in the DCI in step 1103. This method schedules resources for measurement result reporting only after the CPE successfully accesses the base station, avoiding waste of resources scheduled by the base station for measurement result reporting due to unsuccessful CPE contention.

[0197] Optionally, the uplink resources used for reporting can be resources associated with ACK. For example, after a certain time offset following ACK, designated uplink resources will be used to transmit measurement results. Based on this method, the base station can reduce the signaling overhead of DCI.

[0198] Optionally, the terminal may report measurement results for at least one beam other than the selected beam in the uplink resources. These results are used to determine candidate beams for beam recovery.

[0199] like Figure 11B As shown, after receiving msg4, which matches its identity information, the CPE successfully accesses the base station and sends an ACK message indicating successful access to the base station, with a certain time offset ( Figure 11B After the offset shown, the measurement results are reported via PUSCH resources. This method uses resources associated with the transmission of ACK to report measurement results after successful CPE access, without requiring the base station to schedule dedicated uplink resources for measurement result reporting, thus saving signaling overhead.

[0200] Using this method, the CPE can complete CSI-RS measurements during random access, quickly obtain a narrow beam pair for communication with the base station, and reduce signaling overhead and fast data transmission latency. The base station directly sends detailed CSI-RS configuration information via msg4, reducing restrictions on RO resources and / or preambles used by the CPE, making the design more flexible, reducing the probability of conflicts with other CPEs, and shortening the time to access the base station.

[0201] Considering the contention issue between different CPEs, a CPE can only successfully access the base station if it successfully receives msg4 from the base station and the identity information contained in msg4 matches the CPE's identity information. If the CPE fails to connect to the base station during the initial connection process—for example, it can successfully receive msg4 from the base station but the identity information in msg4 does not match the CPE's identity information—the CPE can switch the preamble and retransmit msg1. In the new access process, the CPE can continue to request CSI-RS measurements to cope with changes in measurement results caused by changes in the transmission environment.

[0202] Optionally, if the CPE includes CSI-RS request information in every msg3 sent, the signaling overhead required for CSI-RS measurement increases, and the waiting time grows. Therefore, the CPE can be configured not to carry CSI-RS request information when sending msg3 for the second time, and the corresponding msg4 does not need to carry CSI-RS measurement related information either. Only one CSI-RS measurement is completed during the CPE's successful access to the base station. For example, during the second round of random access, the CPE adjusts the CSI-RS measurement request information carried in msg3 from "1" (indicating a request for CSI-RS measurement) to "0" (indicating no request for CSI-RS measurement, or that CSI-RS measurement has been completed).

[0203] Optionally, when the CSI-RS measurement request information is a multi-bit value, values ​​other than all 0s and all 1s can be used to represent the CSI-RS identification information (CRI). The beam associated with the CSI-RS identification information can be the beam corresponding to the maximum RSRP value obtained in the most recent CSI-RS measurement. This method can be used to report CSI-RS measurement results. When the CPE fails to compete in the first round of random access, it can report the first round of CSI-RS measurement results in the CSI-RS measurement request in msg3 of the second round of random access. When the base station receives a CSI-RS measurement request with values ​​other than all 0s and all 1s, it can be determined that the CPE has completed the CSI-RS measurement without needing to reconfigure the CSI-RS measurement, and the value in this CSI-RS measurement request information is the CSI-RS measurement result reported by the CPE. Based on this method, the waste of resources related to repeated CSI-RS measurements due to competition failure is avoided, the overhead of CSI-RS measurement result reporting and the overhead of scheduling the reporting of measurement results are reduced, and the beam corresponding to the CRI can be used directly to communicate with the CPE in msg4, thereby improving the communication rate.

[0204] Optionally, if the CSI-RS measurement request information is a multi-bit value, a specific bit can be defined to distinguish the meaning of values ​​other than all 0s and all 1s. For example, a first bit of "0" can indicate that the CPE has completed a CSI-RS measurement in this random access, and the values ​​other than the first bit among the all 0s and all 1s represent the CSI-RS identification information (CRI) determined by the CSI-RS measurement; a first bit of "1" can indicate that the CPE has not performed a CSI-RS measurement, and the values ​​other than the first bit among the all 0s and all 1s represent the CRI corresponding to the narrow beam recommended by the CPE based on stored information.

[0205] Figure 12 A schematic diagram illustrating the interaction between the CPE and the base station is shown. Based on the above method, combined with... Figure 12The relevant process is illustrated with an example. In the initial random access, during the first round of random access, the CPE sends msg1 to the base station in step 1201, receives msg2 from the base station in step 1202, sends CSI-RS measurement request 1 (e.g., request signaling 111) via msg3 in step 1203, receives msg4 containing CSI-RS related configuration information from the base station in step 1204, and in step 1205, the base station sends CSI-RS according to the CSI-RS related configuration information, and the CPE performs CSI-RS measurement according to the CSI-RS related configuration information sent by the base station. However, the identity information in msg4 received by the CPE in step 1204 is inconsistent with the CPE's identity information, resulting in a failed contention. The CPE does not need to report the CSI-RS measurement result and the successful access ACK information (msg5). Subsequently, the CPE reselects the preamble and re-executes the msg1-msg4 process in steps 1206 to 1209. Here, msg3 sent in step 1208 includes CSI-RS measurement request 2 (e.g., request signaling 101) instead of CSI-RS measurement request 1. The modified CSI-RS measurement request 2 represents or includes the beam identity information (e.g., CRI) corresponding to the maximum RSRP obtained from the CSI-RS measurement. When the base station receives this modified CSI-RS measurement request 2, it does not configure CSI-RS measurement and determines the narrow beam for subsequent data transmission with the CPE based on the beam corresponding to the received CSI-RS measurement request 2 (e.g., the measurement result indicated by multiple bits in CSI-RS measurement request 2). When msg4 is sent in step 1209, the base station can use this narrow beam to send data to the CPE, improving data transmission efficiency. If the CPE can successfully compete in msg4 received in this round, it only needs to send ACK information to the base station in step 1210, thus reducing signaling overhead; if the CPE fails to compete in msg4 received in this round, the relevant process of the second round of competition shown in the figure can be repeated (including CSI-RS measurement request 2 in msg3) until the CPE successfully competes or the maximum number of repeated accesses is reached.

[0206] Example 3

[0207] During the two-step random access process, the CPE requests configuration of CSI-RS measurements via a "CSI-RS measurement request message," which can be sent in msg A during the random access process. msgA contains a MsgA Preamble and a MsgA payload. If the CSI-RS measurement request message is transmitted in the MsgA Preamble, its format is the same as in Embodiment 1; if the CSI-RS measurement request message is transmitted in the MsgA payload, its format is the same as in Embodiment 2.

[0208] The base station receives a random access request msg A sent by the CPE and determines whether CSI-RS measurement needs to be configured for the terminal based on the information in msg A. For example, if msg A contains explicit and / or implicit CSI-RS measurement request information, the base station determines whether CSI-RS related configuration information needs to be sent to the CPE and sends the CSI-RS related configuration information to the CPE. The CSI-RS related configuration information can be sent via msg B, and the content sent can be at least one set of CSI-RS related configuration information or CSI-RS related configuration information indication information. Similar to the methods in Embodiments 1 and 2 described above, it can be transmitted in the PDSCH and / or the PDCCH indicating the PDSCH in msg B. The specific process can be found in the descriptions in Embodiments 1 and 2 above. To avoid redundancy, it will not be repeated here.

[0209] Example 4

[0210] In some communication systems, the methods described in both Embodiment 1 and Embodiment 2 can be supported. For example, the CPE can determine which method to use based on the base station's configuration information.

[0211] The measurement based on the measurement request sent in msg1, as described in Example 1, is suitable for systems with a small number of connected terminals. In this system, a portion of PRACH resources is allocated to the CPE to indicate its terminal type and / or measurement request. Using this method, the terminal can begin data transmission using a narrow beam as early as msg4, making it suitable for services with high transmission latency requirements.

[0212] The measurement based on the measurement request sent via msg3, as described in Example 2, is suitable for systems with a large number of connected terminals. In this system, more PRACH resources can be used to send random access requests, reducing the probability of contention failure. This method reduces the probability of terminals failing to access the base station due to limitations in random access resources, and also allows for faster access speeds.

[0213] The CPE can determine which method to use for random access based on the base station's configuration information. The base station's configuration information can be determined by information contained in and / or indicated by the SSB sent by the base station. For example, it can be determined through broadcast system information (SIB2).

[0214] The configuration information sent by the base station may include implicit or explicit indication information, which is used by the CPE to determine which method to use for random access. Figure 15This diagram illustrates how a terminal (e.g., a CPE) determines, based on configuration information, which method (e.g., the method described in Embodiment 1, referred to as Option 1; or the method described in Embodiment 2, referred to as Option 2) to perform random access. Figure 15 As shown, in step 1501, the CPE receives system information (SI). In step 1502, the CPE determines whether an early beam measurement request is supported based on the indication information in the SI. For example, the CPE receives configuration information from a base station and determines whether the base station supports narrow beam measurement during random access. If the base station is a conventional base station, the determination result in step 1502 can be "not supported," and the indication information will indicate that the base station does not support configuring narrow beam measurement during random access. In this case, the CPE can execute step 1504, where the CPE performs random access without a beam measurement request. If the base station supports configuring narrow beam measurement during random access, the determination result in step 1502 can be "supported," and the CPE can execute step 1503: the CPE determines the option for the early beam measurement request based on the option indication information or PRACH resource allocation information in the SI. For example, the CPE can determine whether to select the method described in Embodiment 1 (option 1) or the method described in Embodiment 2 (option 2) to perform random access based on the explicit or implicit indication information of the base station.

[0215] Explicit indication methods can be explicit parameters in the configuration information, such as: Early Beam Measurement Request Options = {option1, option2}, or other information indicating option1 and option2, such as "0" indicating the use of option1, "1" indicating the use of option2, and so on. Implicit indication methods can be the base station's random access resource allocation information. For example, if the system information contains CPE-specific random access resource information (RO, preamble), this information implicitly indicates that the base station is configured with option1. Similarly, if CPE-specific random access resource configuration information does not exist, the terminal uses the method shown in option2 to send the measurement request and perform measurement and related processes.

[0216] Example 5

[0217] In some embodiments, a two-step measurement result reporting method is designed to reduce the time delay caused by the related processes of the introduced narrow beam measurement.

[0218] When configuring narrow-beam measurement, the base station can determine the period and number of CSI-RS messages sent for measurement based on the time difference (offset) between the transmission of signaling messages from two random access attempts (e.g., msg2 and msg3, etc.) in a single random access attempt. This allows the terminal to complete the measurement before the next signaling message is sent. The configuration signaling is sent to the CPE via the relevant signaling for initial access, such as resource configuration parameters in the UL grant.

[0219] However, considering the different capabilities of different CPEs and / or the differences in the time required for different terminals to process data, the terminal may have only completed part of the data processing of the CSI-RS measurement results when sending the next random access signaling (e.g., msg3).

[0220] To ensure that the terminal can obtain the narrow beam measurement results as quickly as possible and apply them to the transmission process without changing the existing random access signaling timeline, only part of the processed measurement results can be reported in a random access signaling message, and the remaining measurement results can be reported in the subsequent data transmission process, or the complete measurement results including all beams can be reported for higher beam gain and transmission efficiency.

[0221] In one implementation, the reported partial measurement results need to meet certain conditions. For example, if among the partially processed measurement results, there exists a beam with a reference signal received power value (e.g., RSRP or RSRQ) greater than or equal to a specified threshold. For example, if the maximum value of the reference signal received power value in the partially processed measurement results is greater than the specified threshold, then the beam information (e.g., CSI-RS resource index) corresponding to the maximum reference signal received power value is reported. The threshold can be obtained through the base station's configuration signaling, for example, in the system information sent by the base station (e.g., through SIB-CPE). The threshold corresponds to a conditional threshold for a narrow beam that can be used as msg4; for example, if the measured value of this beam is greater than the threshold, then this beam is considered to be usable for msg4 transmission, even though this beam is not necessarily the strongest beam among all measured beams. If among the partially processed measurement results, there is no beam with a maximum reference signal received power value (RSRP) greater than the specified threshold, then information indicating non-existence (e.g., NA, or a pre-agreed value) is reported, or no measurement results are reported.

[0222] In one implementation, in subsequent uplink signaling, the terminal reports measurement results based on all beams. If a beam with better received power (higher received power) exists in the subsequent processed measurement results compared to the first reported measurement result, the terminal will report the beam with the strongest measurement result (highest received power) among all beams; if no beam with better received power (higher received power) exists in the subsequent processed measurement results compared to the first reported measurement result, the terminal will report the measurement result of the beam corresponding to the first measurement result. In this way, the terminal can report information related to all measurement results, for example, it can report the overall best measurement result. Alternatively, the terminal can report a portion of the measurement results in the first report and the remaining measurement results in the second report, allowing the base station to obtain the measurement results of all configured measurement beams, or information characterizing the measurement results of all beams, through the terminal's two reports.

[0223] In different embodiments, the transmission channels and signaling used for reporting the partial measurement results are different. Figure 16 Taking Example 1 as an example, an example is provided to illustrate the transmission channel and / or transmission signaling in which the two-step measurement results are reported.

[0224] like Figure 16 As shown, in step 1601, the CPE performs early narrow-beam measurements; in step 1602, the CPE sends a first report in msg3, which is, for example, a report related to the partial measurement results that the CPE has already processed before msg3 is sent; in step 1603, the CPE determines whether the competition is successful; if the competition is successful, then step 1604 is executed, the CPE sends a second report in msg5, and in step 1606, the CPE reports a candidate beam report. If the determination in step 1603 is that the competition has failed, then step 1605 is executed, the CPE sends a second report in the next round of msg3, and after sending ACK in step 1607, step 1606 is executed. The second report is, for example, a report related to all measurement results obtained by the CPE in performing early narrow-beam measurements.

[0225] In one implementation, in the method of performing beam measurement after msg2 as described in Embodiment 1, some measurement results can be sent in msg3, and all measurement results can be sent along with the ACK on the uplink PUCCH resource of successful random access.

[0226] Considering a contention-based random access procedure for the terminal, if the contention fails, the measurement results of all beams can be sent in msg3 during the second round of random access attempts after the contention failure. Since the terminal will change its preamble and resend the PRACH request after the contention failure, if the terminal does not continue to send measurement requests, the measurement results information of all beams reported by this terminal can also be used to indicate that the terminal type is CPE (for example, this can be considered an implicit indication). Figure 17 A schematic diagram illustrating a two-step measurement result reporting process by a terminal according to an embodiment is shown. Figure 17 As shown, in a single attempt at random access (e.g., Figure 17 In the first attempt shown, the terminal sends a beam measurement request along with msg1. Figure 17 As shown in the request), if random access is successful, the terminal sends a first report via msg3 and a second report via msg5 along with the ACK. If random access fails in this attempt, the terminal sends a first report via msg3 in this attempt and a second report via msg3 in the next attempt. In the next attempt, the beam measurement request will not be sent repeatedly when sending msg1.

[0227] Similarly, in the method for performing beam measurement after msg4 described in Embodiment 2, some measurement results can be sent along with the ACK on the uplink PUCCH resource after successful random access, while the measurement results of all beams can be sent on the PUSCH resource after the PUCCH. For example, the base station can use the uplink PUSCH resource configured by DCI after receiving the PUCCH, or pre-agree on the PUSCH resource associated with the PUCCH resource.

[0228] Figure 18 This diagram illustrates the beams involved in the two reported measurement results when a terminal successfully accesses the network in a single attempt. Figure 18 As shown, considering the measurement result processing time at the terminal (e.g., Figure 18 (As shown in the CSI processing time), the measurement results related to beams 1 to m will be reported as the first CSI report in msg3, and the measurement results related to the remaining beams will be reported as the second CSI report in ACK.

[0229] Because the resource size transmitted via the PUSCH is not limited by the number of signaling bits in random access, the measurement results of candidate beams can also be sent via the PUSCH. The information of the candidate beams can be used in subsequent beam recovery and / or beam maintenance processes.

[0230] Although the foregoing has used terms such as "Example 1" and "Example 5" to describe various aspects of this disclosure by way of example, it is understood that these described solutions can be combined with each other.

[0231] Furthermore, it is understood that CSI-RS has been described in this disclosure as an example of a reference signal used for measurement in beam management; however, this is merely an example, and other reference signals may be used, as well as measurement configuration or reporting methods provided in this disclosure, all of which are within the scope of this disclosure. In addition, the methods provided in this disclosure can be used not only for communication between the base station and the CPE, but also for communication between the base station and the UE or between the base station and other types of terminals.

[0232] Figure 13 A schematic diagram of the structure of a first device 1300 according to at least one embodiment of the present disclosure is shown. The first device may be, for example, a CPE, an FWA-related device, or a user equipment (UE). Reference Figure 13 The first device 1300 includes a transceiver 1301 and a controller 1302. The transceiver 1301 is configured to transmit data or signals and receive data or signals. The controller 1302 is coupled to the transceiver 1301 and configured to perform control such that the first device 1300 performs methods according to embodiments of the present disclosure. In one implementation, the first device 1300 may further include a memory (not shown) storing computer-executable instructions that, when executed by the controller 1302, allow the first device 1300 to perform at least one method corresponding to the above embodiments of the present disclosure.

[0233] Figure 14 A schematic diagram of the structure of a network device (e.g., a base station) 1400 according to at least one embodiment of the present disclosure is shown. (See reference...) Figure 14 The network device 1400 includes a transceiver 1401 and a controller 1402. The transceiver 1401 is configured to transmit or receive data or signals. The controller 1402 is coupled to the transceiver 1401 and configured to perform control to cause the network device 1400 to perform methods according to embodiments of the present disclosure. In one implementation, the network device 1400 may further include a memory (not shown) storing computer-executable instructions that, when executed by the controller 1402, allow the network device 1400 to perform at least one method corresponding to the above embodiments of the present disclosure.

[0234] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0235] Those skilled in the art will understand that this invention includes devices for performing one or more of the operations described in this application. These devices may be specifically designed and manufactured for the desired purpose, or may include known devices found in general-purpose computers. These devices have computer programs stored therein that can be selectively activated or reconfigured. Such computer programs may be stored in a device (e.g., a computer)-readable medium or in any type of medium suitable for storing electronic instructions and coupled to a bus, including but not limited to any type of disk (including floppy disks, hard disks, optical disks, CD-ROMs, and magneto-optical disks), ROM (Read-Only Memory), RAM (Random Access Memory), EPROM (Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), flash memory, magnetic cards, or optical cards. That is, a readable medium includes any medium by which a device (e.g., a computer) stores or transmits information in a readable form.

[0236] Those skilled in the art will understand that each block in these structural diagrams and / or block diagrams and / or flow diagrams, as well as combinations of blocks in these structural diagrams and / or block diagrams and / or flow diagrams, can be implemented using computer program instructions. Those skilled in the art will also understand that these computer program instructions can be provided to a processor of a general-purpose computer, a specialized computer, or other programmable data processing method for implementation, thereby enabling the processor of the computer or other programmable data processing method to execute the schemes specified in the blocks or plurality of blocks of the structural diagrams and / or block diagrams and / or flow diagrams disclosed herein.

[0237] Those skilled in the art will understand that the steps, measures, and schemes in the various operations, methods, and processes discussed in this invention can be alternated, modified, combined, or deleted. Furthermore, other steps, measures, and schemes in the various operations, methods, and processes discussed in this invention can also be alternated, modified, rearranged, decomposed, combined, or deleted. Furthermore, steps, measures, and schemes in the prior art that are similar to those disclosed in this invention can also be alternated, modified, rearranged, decomposed, combined, or deleted.

[0238] The above description is only a partial embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method performed by a first device in a communication system, comprising: Send a first message to the base station relating to the random access procedure to request a measurement of the reference signal; Receive a second message related to the random access procedure or a PDCCH for scheduling the second message from the base station to obtain fourth information related to the measurement configuration of the reference signal; Based on the fourth information, the reference signal is measured to obtain the measurement result; Report the measurement results.

2. The method according to claim 1, wherein, The first message is message 1, message 3, or message A in the random access process. The first message includes indication information indicating a request for measurement of the reference signal.

3. The method according to claim 2, wherein, The indication information includes one bit or more bits. In cases where the indication information includes multiple bits, the multiple bits are also used to indicate a recommended reference signal index.

4. The method according to claim 3, wherein, The recommended reference signal index includes at least one of the following: a reference signal index previously used for beam association, or a reference signal index associated with measurement results obtained from previous measurements during random access.

5. The method according to claim 4, wherein, One of the bits used to indicate the recommended reference signal index is used to indicate whether the recommended reference signal index is related to a previously used reference signal index or to a measurement result obtained by measuring the reference signal during the random access process.

6. The method according to any one of claims 2-5, wherein, If message 4 in the random access process indicates a contention failure, a first message is sent to the base station, wherein the indication information indicates a request for measurement of the reference signal.

7. The method according to any one of claims 2-5, wherein, If message 4 in the random access process indicates contention failure, a first message is sent to the base station, wherein the indication information indicates that a measurement of the reference signal is not requested.

8. The method according to claim 7, wherein, If the indication information includes multiple bits, the indication information is also used to indicate a recommended reference signal index.

9. The method according to claim 1, wherein, The first message is message 1 or message A in the random access process, and The first message is sent using a preamble for the first type and / or on a random access timing (RO) for the first type, and the first device is of the first type.

10. The method according to claim 9, wherein, If message 4 in the random access process indicates contention failure, a first message is sent to the base station, wherein the first message uses a preamble for the first type and / or is sent on a RO for the first type.

11. The method according to claim 9, wherein, If message 4 in the random access process indicates contention failure, a first message is sent to the base station, wherein the first message is sent using a first preamble and / or on a first RO. The first preamble includes preambles other than those used for the first type of preamble, or preambles other than those used for requesting the measurement of a reference signal in the first type of preamble, or preambles used for measurements in the first type of preamble that do not request a reference signal. The first RO includes ROs other than those used for the first type of RO, or ROs other than those used for measurements of the first type of RO that request a reference signal, or ROs used for measurements of the first type of RO that do not request a reference signal.

12. The method according to any one of claims 1-11, wherein, The second message includes message 2, message 4, or message B from the random access procedure. The fourth information includes the first information in the measurement configuration or the measurement configuration information in the indication configuration information set, wherein the first information includes part or all of the measurement configuration information.

13. A method performed by a base station in a communication system, comprising: Receive a first message relating to the random access procedure, the first message requesting a measurement of a reference signal; The fourth information relating to the measurement configuration of the reference signal is sent to the first device via a second message related to the random access procedure or a PDCCH used to schedule the second message; Receive the measurement results of the reference signal reported by the first device.

14. A first device in a communication system, comprising: A transceiver is configured to transmit and / or receive signals; The controller is configured to control the first device to perform the method according to any one of claims 1-12.

15. A base station in a communication system, comprising: A transceiver is configured to transmit and / or receive signals; The controller is configured to control the base station to perform the method according to claim 13.

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