Communication method, communication device and communication system

Abstract

The invention provides a communication method, communication equipment and a communication system, and relates to the technical field of communication. The method comprises the steps that the terminal determines first information; and determining a first RO and / or a first lead code corresponding to a first reference signal according to the first information, the first reference signal being associated with a second reference signal. By applying the technical scheme of the invention, a method for determining the RO and / or the lead code corresponding to the first reference signal when the first reference signal is associated with the second reference signal in fast beam scanning is provided, so that the beam scanning time is reduced, and fast random access is ensured.

Description

A communication method, communication device and communication system Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to a communication method, communication device and communication system. Background Technology

[0002] In Multiple-Input Multiple-Output (MIMO) systems, high-frequency bands and massive MIMO antenna arrays are introduced to provide higher spectral efficiency. Massive MIMO antennas can provide greater beamforming gain, effectively compensating for the transmission losses caused by high-frequency bands.

[0003] Summary of the Invention

[0004] This disclosure proposes a communication method, communication device, and communication system. The technical solution provided by this disclosure can determine the first random access timing (RO) and / or the first preamble corresponding to the first reference signal when the first reference signal is associated with the second reference signal.

[0005] A first aspect of this disclosure provides a communication method executed by a terminal, the method comprising: determining first information; determining a first random access timing (RO) and / or a first preamble corresponding to a first reference signal based on the first information, wherein the first reference signal is associated with a second reference signal.

[0006] A second aspect of this disclosure provides a communication method executed by a network device, the method comprising: sending first information to a terminal; wherein the first information is used to determine a first RO and / or a first preamble corresponding to a first reference signal, wherein the first reference signal is associated with a second reference signal.

[0007] A third aspect of this disclosure provides a terminal, including: a processing module configured to determine first information; and to determine a first RO and / or a first preamble corresponding to a first reference signal based on the first information, wherein the first reference signal is associated with a second reference signal.

[0008] A fourth aspect of this disclosure provides a network device, the network device comprising: a transceiver module configured to transmit first information to a terminal; wherein the first information is used to determine a first RO and / or a first preamble corresponding to a first reference signal, wherein the first reference signal is associated with a second reference signal.

[0009] A fifth aspect of this disclosure provides a communication device, including: one or more processors; wherein the processors are configured to perform the method as described in the first aspect embodiment, or to perform the method as described in the second aspect embodiment.

[0010] A sixth aspect embodiment of this disclosure provides a communication system, including: a terminal and a network device; the network device is configured to send first information to the terminal; the terminal is configured to receive the first information and determine a first RO and / or a first preamble corresponding to a first reference signal based on the first information, wherein the first reference signal is associated with a second reference signal.

[0011] A seventh aspect embodiment of this disclosure provides a communication method, comprising: a network device sending first information to a terminal; the terminal receiving the first information and determining a first RO and / or a first preamble corresponding to a first reference signal based on the first information, wherein the first reference signal is associated with a second reference signal.

[0012] An eighth aspect embodiment of this disclosure provides a computer storage medium storing computer-executable instructions; when executed by a processor, the computer-executable instructions can implement the methods described in the first aspect embodiment or the second aspect embodiment.

[0013] A ninth aspect embodiment of this disclosure provides a computer program product, wherein the computer program product stores a computer program; when the computer program is executed by a processor, it is able to implement the methods described in the first aspect embodiment or the second aspect embodiment.

[0014] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0016] Figure 1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure;

[0017] Figure 2 is a flowchart illustrating one of the communication methods according to an embodiment of the present disclosure;

[0018] Figure 3 is a second schematic flowchart of a communication method according to an embodiment of the present disclosure;

[0019] Figure 4 is a third schematic flowchart of a communication method according to an embodiment of the present disclosure;

[0020] Figure 5 is a structural block diagram of a terminal according to an embodiment of the present disclosure;

[0021] Figure 6 is a structural block diagram of a network device according to an embodiment of the present disclosure;

[0022] Figure 7 is a schematic diagram of the structure of a communication device according to an embodiment of the present disclosure;

[0023] Figure 8 is a schematic diagram of the structure of a chip provided in an embodiment of this disclosure. Detailed Implementation

[0024] The embodiments of this disclosure are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this disclosure, and should not be construed as limiting this disclosure. It should be noted that, unless otherwise specified, the embodiments of this disclosure and the features in the embodiments can be combined with each other.

[0025] For ease of understanding, the terminology used in the embodiments of this disclosure will be introduced first.

[0026] 1. Near field and far field

[0027] For a given antenna array (whose aperture is denoted as D), its electromagnetic (EM) field can be divided into a near field and a far field. The boundary between the near field and the far field is... This is known as the Rayleigh distance. The size of the near-field range depends on the antenna aperture (D) and wavelength (λ). For a terminal in the far field, the electromagnetic waves arriving at the terminal from its different antenna ports or elements are plane waves, and the beam targeting the terminal is a two-dimensional (2D) directional beam pointing towards the target terminal. For any path in multipath propagation, the time and phase of arrival at the terminal's receiving antenna array are equally spaced. If the terminal is in the near field, then the electromagnetic waves received by the terminal are spherical waves, and the beam targeting the terminal is a three-dimensional (3D) beam surrounding the target terminal. For any path in multipath propagation, the time and phase of arrival at the terminal's receiving antenna array will no longer be equally spaced. When the terminal is in the near field, as mentioned above, for any path in multipath propagation, the time and phase of arrival at the terminal's receiving antenna array are no longer equally spaced.

[0028] 2. Synchronization Signal Block (SSB)

[0029] SSB refers to the combination of the synchronization signal and the PBCH (Physical Broadcast Channel) block. It includes the primary synchronization signal (PSS), the secondary synchronization signal (SSS), and the broadcast channel, and is used for initial access, time synchronization, and cell search of terminals. SSB is an important signal used by base stations to broadcast system information and help terminals discover the network.

[0030] Each SSB corresponds to a different SSB index, and the terminal can obtain downlink synchronization based on the different transmission times corresponding to the SSB index.

[0031] For example, each synchronization signal block (SSB) occupies four consecutive symbols, in the following order: PSS, PBCH, SSS+PBCH (the middle 12 RBs are SSS, and the four RBs on each side are PBCH, i.e., the SSB occupies 20 RBs), and PBCH. Some subcarriers in the PBCH are DMRS. The subcarrier spacing of the synchronization signal block can be 15kHz, 30kHz, 120kHz, and 240kHz. All synchronization signal blocks are transmitted within a 5ms interval. To support beam transmission, each beam needs to transmit an SSB when there is a beam. Therefore, the maximum number of synchronization signal blocks that can be transmitted within 5ms is 4 (below 3GHz), 8 (3GHz to 6GHz), or 64 (above 6GHz). These multiple SSBs within 5ms are called SSB burst sets. The period of an SSB burst set can be 5ms, 10ms, 20ms, 40ms, etc.

[0032] At 15kHz, the time-domain distribution of synchronization signal blocks is as follows: symbols 2-5 and 8-11 are occupied in every 14 symbols. At 15kHz, the maximum number of synchronization signal blocks is 4 or 8, that is, the starting symbol position of each synchronization signal block is {2,8}+14*n, where n is 0,1 or 0,1,2,3.

[0033] At 30kHz, the time-domain distribution of the synchronization signal block is as follows: symbols 2-5 and 8-11 are occupied in every 14 symbols. At 30kHz, the maximum number of synchronization signal blocks is 4 or 8, that is, the starting symbol position of each synchronization signal block is {2,8}+14*n, where n is 0,1 or 0,1,2,3.

[0034] At 30kHz, the time-domain distribution of the synchronization signal block is as follows: symbols 4-7, 8-11, 16-19, and 20-23 are occupied in every 28 symbols. However, at 30kHz, the maximum number of synchronization signal blocks is 4 or 8, meaning the starting position of each synchronization signal block is {4,8,16,20}+28*n, where n is 0 or n=0 or 1.

[0035] At 120kHz, the time-domain distribution of synchronization signal blocks is as follows: symbols 4-7, 8-11, 16-19, and 20-23 are occupied out of every 28 symbols. At 120kHz, the maximum number of synchronization signal blocks is 64, meaning the starting position of each synchronization signal block is {4,8,16,20} + 28*n, where n = 0, 1,2,3,5,6,7,8,10,11,12,13,15,16,17,18.

[0036] At 240kHz, the time-domain distribution of synchronization signal blocks is as follows: symbols 8-11, 12-15, 16-19, 20-23, 32-35, 36-39, 40-43, and 44-47 are occupied out of every 56 symbols. At 240kHz, the maximum number of synchronization signal blocks is 64, meaning the starting position of each block is {8,12,16,20,32,36,40,44} + 56*n, where n = 0, 1, 2, 3, 5, 6, 7, 8.

[0037] Therefore, based on the above situation, with the SSB fixed in position, the terminal receives the SSB and obtains the SSB index from the DMRS sequence in the SSB or the DMRS sequence and the payload in the PBCH. Then, it can determine which time slot and which symbol in the 5ms time corresponds to the SSB, thus achieving downlink synchronization.

[0038] 3. Random Access Preamble (RA preamble) and Random Access Timing (RO)

[0039] The RA preamble and RO can be used in the terminal's random access procedure. During initial synchronization with the base station, the terminal detects one of the SSBs sent by the base station, obtains the SSB index, and thus knows the symbol position of the SSB. Therefore, the terminal and the base station achieve downlink symbol synchronization. To achieve uplink synchronization, the terminal needs to send an RA preamble. The selection of this preamble, and which RO (referring to the corresponding time-frequency domain resource) it is sent to, is determined by the SSB received by the user, the actual SSBs sent by the base station, and the set of RO positions. The specific process is as follows:

[0040] Step 1: The terminal detects that the SSB index of the SSB it received is SSB#1.

[0041] Step 2: The terminal receives the SIB1 message sent by the base station, indicating which SSB information the base station actually sent. The base station uses two 8-bit segments to indicate which SSBs were actually sent. Since the maximum number of SSB positions that can be sent is 64, these 64 SSBs are divided into 8 groups, with the 8 SSB positions within each group being consecutive. That is, SSB#0 to #7 are the first group, SSB#8 to #15 are the second group, and so on, with SSB#56 to #63 being the eighth group. The first 8-bit segment indicates which groups have SSBs sent. For example, if the first 8-bit segment is 00000001 (the left side is the high-order bit, and the right side is the low-order bit), it means that only the first group has SSBs sent. The second 8-bit segment indicates which SSB positions within those groups were sent. For example, if the second 8-bit segment is 10011011, it means that SSB#0, #1, #3, #4, and #7 were sent within the first group.

[0042] Thirdly, through the first and second steps, the terminal knows that the SSB#1 it received is the second of the five SSBs sent by the base station.

[0043] The fourth step involves the terminal receiving SIB1 from the base station to obtain the SSB-perRACH-Occasion information. This information identifies how many actual transmitting SSBs need to allocate a preamble within a RO. The value is SSB-perRACH-Occasion{1 / 8, 1 / 4, 1 / 2, 1, 2, 4, 8, 16}. When this parameter is 1 / 8, it indicates that the SSB occupies 8 consecutive ROs. When the parameter is 8, it indicates that 8 actual transmitting consecutive SSBs share the RO but use different preambles. For example, 64 preambles can be divided into 8 consecutive groups, with each SSB corresponding to one group. Simultaneously, the terminal receives SIB1 from the base station to obtain the number of FDM ROs, which can be one of {1, 2, 4, 8}. If the value is 2, it indicates that there are two ROs in different frequency domains at the same time. The RO numbering is frequency domain first, then time domain.

[0044] 4. Channel State Information Reference Signal (CSI-RS)

[0045] CSI-RS is used by terminals to estimate Channel State Information (CSI), which includes channel quality, phase information, beamforming information, and time-frequency tracking information. It is crucial for base stations to perform dynamic resource allocation, beamforming, and optimized data transmission. CSI-RS can be configured as multiple resources or ports, each representing a different time-frequency location or spatial stream, enabling the base station to collect feedback from different angles or channel conditions.

[0046] During beam management or optimization of wireless link quality, the base station uses the Service Point Substation (SSB) as the initial access point and the basis for beam alignment. Then, through multiple CSI-RS resources or ports associated with the SSB, it further refines and optimizes the beam pointing to the UE. Specifically, the base station first uses SSB beam scanning to broadcast signals in different directions. The terminal determines the optimal initial connection direction with the base station by detecting the strongest SSB signal. Once the terminal locks onto an SSB beam, the base station schedules multiple CSI-RS resources or ports based on the beam direction corresponding to that SSB. These CSI-RS signals are transmitted at different time-frequency locations or spatial dimensions, helping the terminal to more precisely measure the channel state of different directions or spatial flows. Based on the received CSI-RS signals, the terminal estimates detailed beam or channel information and feeds it back to the base station. The base station uses this information to adjust its beamform to optimize the transmission quality for specific terminals, such as using beamforming technology to concentrate signal energy to the exact location of the terminal, reducing interference and improving data transmission rates.

[0047] This disclosure presents a communication method, communication device, and communication system.

[0048] In a first aspect, embodiments of this disclosure propose a communication method executed by a terminal, the method comprising: determining first information; determining a first RO and / or a first preamble corresponding to a first reference signal based on the first information, wherein the first reference signal is associated with a second reference signal.

[0049] The technical solution provided in this disclosure can determine the first RO and / or the first preamble corresponding to the first reference signal when the first reference signal is associated with the second reference signal.

[0050] In conjunction with some embodiments of the first aspect, the first reference signal includes a Channel State Information-Reference Signal (CSI-RS).

[0051] In conjunction with some embodiments of the first aspect, the second reference signal includes a synchronization signal block (SSB).

[0052] In conjunction with some embodiments of the first aspect, the association of the first reference signal with the second reference signal includes one of the following:

[0053] The second reference signal is associated with multiple first reference signal resources, and one first reference signal corresponds to one first reference signal resource;

[0054] The second reference signal is associated with multiple ports or port groups of a first reference signal resource, and one first reference signal corresponds to one port or port group of the first reference signal resource.

[0055] In conjunction with some embodiments of the first aspect, the method further includes: the first information comprising at least one of the following:

[0056] The first quantity represents the number of resources of the first reference signal resource associated with the second reference signal;

[0057] The second quantity represents the number of ports or port groups corresponding to the first reference signal resource associated with the second reference signal.

[0058] The first identifier represents the identifier of the first reference signal resource corresponding to the first reference signal;

[0059] The second identifier represents the port identifier or port group identifier of the first reference signal resource corresponding to the first reference signal;

[0060] A first instruction is used to determine a first ratio of the RO occupied by a plurality of first reference signal resources associated with the second reference signal to the RO corresponding to the second reference signal;

[0061] The second instruction is used to determine a second ratio between the preamble occupied by the plurality of first reference signal resources associated with the second reference signal and the preamble corresponding to the second reference signal.

[0062] In conjunction with some embodiments of the first aspect, the method further includes: determining at least one second RO and / or second preamble corresponding to the second reference signal.

[0063] In conjunction with some embodiments of the first aspect, the second RO includes at least one RO, and the second preamble includes at least one preamble.

[0064] In conjunction with some embodiments of the first aspect, the first RO is a subset of the second RO, and the first preamble is a subset of the second preamble.

[0065] In conjunction with some embodiments of the first aspect, determining the first RO and / or the first preamble corresponding to the first reference signal based on the first information includes:

[0066] Divide the first proportional portion of the second RO into the first number of parts, and determine the first RO corresponding to the first reference signal as the Nth part, where the value of N is determined based on the first identifier; and / or,

[0067] The second proportional portion of the second preamble is divided into the first number of parts, and the first preamble corresponding to the first reference signal is determined as the Nth part, where the value of N is determined based on the first identifier.

[0068] In conjunction with some embodiments of the first aspect, determining the first RO and / or the first preamble corresponding to the first reference signal based on the first information includes:

[0069] Divide the first proportional portion of the second RO into the second number of parts, and determine the first RO corresponding to the first reference signal as the Mth part, where the value of M is determined based on the second identifier; and / or,

[0070] The second proportional portion of the second preamble is divided into the second number of parts, and the first preamble corresponding to the first reference signal is determined as the Mth part, wherein the value of M is determined based on the second identifier.

[0071] In conjunction with some embodiments of the first aspect, determining the second information includes: determining the first information based on a protocol agreement, and / or receiving the second information sent by the network device through at least one of the following:

[0072] The demodulation reference signal (DMRS) sequence in SSB;

[0073] The payload of the Physical Broadcast Channel (PBCH) in the SSB;

[0074] Downlink Control Information (DCI);

[0075] System Information Block (SIB) information.

[0076] In conjunction with some embodiments of the first aspect, the first reference signal and the second reference signal are in a quasi-co-address (QCL) relationship.

[0077] Secondly, embodiments of this disclosure propose a communication method executed by a network device, the method comprising: sending first information to a terminal; wherein the first information is used to determine a first RO and / or a first preamble corresponding to a first reference signal, wherein the first reference signal is associated with a second reference signal.

[0078] The technical solution provided in this disclosure can determine the first RO and / or the first preamble corresponding to the first reference signal when the first reference signal is associated with the second reference signal.

[0079] In conjunction with some embodiments of the second aspect, the first reference signal includes CSI-RS.

[0080] In conjunction with some embodiments of the second aspect, the second reference signal includes an SSB.

[0081] In conjunction with some embodiments of the second aspect, the association of the first reference signal with the second reference signal includes one of the following:

[0082] The second reference signal is associated with multiple first reference signal resources, and one first reference signal corresponds to one first reference signal resource;

[0083] The second reference signal is associated with multiple ports or port groups of a first reference signal resource, and one first reference signal corresponds to one port or port group of the first reference signal resource.

[0084] In conjunction with some embodiments of the second aspect, the first information includes at least one of the following:

[0085] The first quantity represents the number of resources of the first reference signal resource associated with the second reference signal;

[0086] The second quantity represents the number of ports or port groups corresponding to the first reference signal resource associated with the second reference signal.

[0087] The first identifier represents the identifier of the first reference signal resource corresponding to the first reference signal;

[0088] The second identifier represents the port identifier or port group identifier of the first reference signal resource corresponding to the first reference signal;

[0089] A first instruction is used to determine a first ratio of the RO occupied by a plurality of first reference signal resources associated with the second reference signal to the RO corresponding to the second reference signal;

[0090] The second instruction is used to determine a second ratio between the preamble occupied by the plurality of first reference signal resources associated with the second reference signal and the preamble corresponding to the second reference signal.

[0091] In conjunction with some embodiments of the second aspect, at least one of the second reference signals corresponds to a second RO and / or a second preamble.

[0092] In conjunction with some embodiments of the second aspect, the second RO includes at least one RO, and the second preamble includes at least one preamble.

[0093] In some embodiments of the second aspect, the first RO is a subset of the second RO, and the first preamble is a subset of the second preamble.

[0094] In conjunction with some embodiments of the second aspect, the first information is used to indicate dividing the first proportional portion of the second RO into the first number of parts, determining the first RO corresponding to the first reference signal as the Nth part therein, wherein the value of N is determined based on the first identifier; and / or,

[0095] The second proportional portion of the second preamble is divided into the first number of parts, and the first preamble corresponding to the first reference signal is determined as the Nth part, where the value of N is determined based on the first identifier.

[0096] In conjunction with some embodiments of the second aspect, the first information is used to instruct the first proportional portion of the second RO to be divided into the second number of parts, determining the first RO corresponding to the first reference signal as the Mth part therein, wherein the value of M is determined based on the second identifier; and / or,

[0097] The second proportional portion of the second preamble is divided into the second number of parts, and the first preamble corresponding to the first reference signal is determined as the Mth part, wherein the value of M is determined based on the second identifier.

[0098] In conjunction with some embodiments of the second aspect, the second information is sent to the terminal via at least one of the following:

[0099] DMRS sequence in SSB;

[0100] The payload of PBCH in SSB;

[0101] Downlink control information;

[0102] SIB information.

[0103] In some embodiments of the second aspect, the first reference signal and the second reference signal are in a QCL relationship.

[0104] Thirdly, embodiments of this disclosure provide a terminal, the terminal comprising: a processing module configured to determine first information; and to determine a first RO and / or a first preamble corresponding to a first reference signal based on the first information, wherein the first reference signal is associated with a second reference signal.

[0105] Fourthly, embodiments of this disclosure provide a network device comprising: a transceiver module configured to send first information to a terminal; wherein the first information is used to determine a first RO and / or a first preamble corresponding to a first reference signal, wherein the first reference signal is associated with a second reference signal.

[0106] Fifthly, this disclosure provides a communication device, specifically a terminal or a network device, comprising: one or more processors; wherein the processor of the terminal is configured to execute the method described in the first aspect embodiment, and the processor of the network device is configured to execute the method described in the second aspect embodiment.

[0107] In a sixth aspect, embodiments of this disclosure provide a communication system, including: a terminal and a network device; the network device is configured to send first information to the terminal; the terminal is configured to receive the first information and determine a first RO and / or a first preamble corresponding to a first reference signal based on the first information, wherein the first reference signal is associated with a second reference signal.

[0108] In a seventh aspect, embodiments of this disclosure provide a communication method, comprising: a network device sending first information to a terminal; the terminal receiving the first information and determining a first RO and / or a first preamble corresponding to a first reference signal based on the first information, wherein the first reference signal is associated with a second reference signal.

[0109] Eighthly, this disclosure provides a computer storage medium storing computer-executable instructions; when executed by a processor, the computer-executable instructions can implement the methods described in the first aspect embodiment or the second aspect embodiment.

[0110] In a ninth aspect, embodiments of this disclosure provide a computer program product, including a computer program that, when executed by a processor, can implement the methods described in the first aspect embodiment or the second aspect embodiment.

[0111] In a tenth aspect, embodiments of this disclosure provide a computer program that, when run on a computer, causes the computer to perform the methods described in the first aspect embodiment or the second aspect embodiment.

[0112] Eleventhly, embodiments of this disclosure provide a chip or chip system. The chip or chip system includes processing circuitry configured to perform the methods described above as in the first aspect embodiment or as in the second aspect embodiment.

[0113] It is understood that the aforementioned terminals, network devices, communication systems, and storage media are all used to execute the methods proposed in the embodiments of this disclosure. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects in the corresponding methods, and will not be repeated here.

[0114] This disclosure provides a communication method, a terminal, a network device, and a communication system. In some embodiments, the terms "communication method" can be substituted for "information processing method," "information sending method," and "information receiving method," and the terms "communication device" can be substituted for "information processing device," "information sending device," and "information receiving device," and the terms "information processing system," "communication system," "information sending system," and "information receiving system" can be substituted for each other.

[0115] This disclosure is not exhaustive, but merely illustrative of some embodiments, and is not intended to limit the scope of protection of this disclosure. Unless otherwise specified, each step in a particular embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a particular embodiment can also be implemented as an independent embodiment, and the order of the steps in a particular embodiment can be arbitrarily interchanged. Furthermore, the optional implementation methods in a particular embodiment can be arbitrarily combined; moreover, the embodiments can be arbitrarily combined, for example, some or all steps of different embodiments can be arbitrarily combined, and a particular embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0116] In each of the disclosed embodiments, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of the embodiments are consistent and can be referenced by each other. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0117] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure.

[0118] In this embodiment of the disclosure, unless otherwise stated, elements expressed in the singular form, such as "a," "an," "the," "the," "the," "the," "the," "the," "this," etc., can mean "one and only one," or "one or more," "at least one," etc. For example, when using articles such as "a," "an," "the," etc. in translation, the noun following the article can be understood as either a singular expression or a plural expression.

[0119] In the embodiments disclosed herein, "multiple" refers to two or more.

[0120] In some embodiments, the terms “at least one of”, “at least one of”, “at least one of”, “one or more”, “a plurality of”, “multiple”, etc., may be used interchangeably.

[0121] The descriptions in this disclosure, such as "at least one of A, B, C..." or "A and / or B and / or C...", include the case where any one of A, B, C... exists alone, as well as the case where any combination of any of A, B, C... exists alone. Each case can exist alone. For example, "at least one of A, B, C" includes the cases of A alone, B alone, C alone, A and B combination, A and C combination, B and C combination, and A and B and C combination. For example, A and / or B includes the cases of A alone, B alone, and A and B combination.

[0122] In some embodiments, the notation "in one case A, in another case B" or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: A is executed regardless of B, i.e., A is executed in some embodiments; B is executed regardless of A, i.e., B is executed in some embodiments; A and B are selectively executed, i.e., A and B are selected for execution in some embodiments; A and B are both executed, i.e., A and B are executed in some embodiments. The same applies when there are more branches such as A, B, and C.

[0123] The prefixes "first," "second," etc., used in the embodiments of this disclosure are merely for distinguishing different descriptive objects and do not impose restrictions on the position, order, priority, quantity, or content of the descriptive objects. The description of the descriptive objects is found in the claims or the context of the embodiments, and the use of prefixes should not constitute unnecessary restrictions. For example, if the descriptive object is a "field," the ordinal numbers preceding "field" in "first field" and "second field" do not restrict the position or order of the "fields." "First" and "second" do not restrict whether the "fields" they modify are in the same message, nor do they restrict the order of "first field" and "second field." Similarly, if the descriptive object is a "level," the ordinal numbers preceding "level" in "first level" and "second level" do not restrict the priority between "levels." Furthermore, the number of descriptive objects is not limited by ordinal numbers and can be one or more. For example, in "first device," the number of "devices" can be one or more. Furthermore, the objects modified by different prefixes can be the same or different. For example, if the object being described is "device", then "first device" and "second device" can be the same device or different devices, and their types can be the same or different. Similarly, if the object being described is "information", then "first information" and "second information" can be the same information or different information, and their content can be the same or different.

[0124] In some embodiments, “including A,” “containing A,” “for indicating A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0125] In some embodiments, the terms “in response to…”, “in response to determining…”, “in the case of…”, “when…”, “if…”, “if…”, etc., can be used interchangeably.

[0126] In some embodiments, the terms “greater than,” “greater than or equal to,” “not less than,” “more than,” “more than or equal to,” “not less than,” “higher than,” “higher than or equal to,” “not lower than,” and “above” can be used interchangeably, as can the terms “less than,” “less than or equal to,” “not greater than,” “less than,” “less than or equal to,” “not more than,” “lower than,” “lower than or equal to,” “not higher than,” and “below”.

[0127] In some embodiments, devices, etc., can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as “device”, “equipment”, “circuit”, “network element”, “node”, “function”, “unit”, “section”, “system”, “network”, “chip”, “chip system”, “entity”, and “subject” can be used interchangeably.

[0128] In some embodiments, "network" can be interpreted as devices included in a network (e.g., access network devices, core network devices, etc.).

[0129] In some embodiments, the terms "access network device (AN device)," "radio access network device (RAN device)," "base station (BS)," "radio base station," "fixed station," "node," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "antenna panel," "antenna array," "cell," "macro cell," "small cell," "femto cell," "pico cell," "sector," "cell group," "carrier," "component carrier," and "bandwidth part (BWP)" can be used interchangeably.

[0130] In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal", "mobile station (MS)", "mobile terminal (MT)", "subscriber station", "mobile unit", "subscriber unit", "wireless unit", "remote unit", "mobile device", "wireless device", "wireless communication device", "remote device", "mobile subscriber station", "access terminal", "mobile terminal", "wireless terminal", "remote terminal", "handset", "user agent", "mobile client", "client", and "narrowband Internet of Things (NB-IoT) device" can be used interchangeably.

[0131] In some embodiments, access network devices, core network devices, or network devices can be replaced by terminals. For example, embodiments of this disclosure can also be applied to structures that replace communication between access network devices, core network devices, or network devices and terminals with communication between multiple terminals (e.g., also referred to as device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, the structure can also be configured such that the terminal has all or part of the functions of the access network device. Furthermore, terms such as "uplink" and "downlink" can be replaced with terms corresponding to communication between terminals (e.g., "sidelink"). For example, uplink channel, downlink channel, etc., can be replaced with sidelink channel, uplink link, downlink link, etc., can be replaced with sidelink link.

[0132] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, core network device, or network device may also be configured to have all or some of the functions of the terminal.

[0133] In some embodiments, the acquisition of data, information, etc., may comply with the laws and regulations of the country where the location is situated.

[0134] In some embodiments, data, information, etc., may be obtained with the user's consent.

[0135] In some embodiments, the threshold mentioned in this embodiment may be a numerical value, a constant, or some fixed value.

[0136] Furthermore, each element, each row, or each column in the table of this disclosure can be implemented as an independent embodiment, and any combination of any element, any row, or any column can also be implemented as an independent embodiment.

[0137] The correspondences shown in the tables of this disclosure can be configured or predefined. The values ​​of the information in each table are merely examples and can be configured to other values; this disclosure is not limiting. When configuring the correspondences between information and parameters, it is not necessarily required to configure all the correspondences shown in each table. For example, the correspondences shown in some rows of the tables in this disclosure may not be configured. Furthermore, appropriate modifications and adjustments can be made based on the above tables, such as splitting, merging, etc. The names of the parameters shown in the headers of the above tables can also use other names that the communication device can understand, and the values ​​or representations of the parameters can also be other values ​​or representations that the communication device can understand. In the implementation of the above tables, other data structures can also be used, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables, or hash tables, etc.

[0138] The predefined terms in this disclosure can be understood as defined, predefined, stored, pre-stored, pre-negotiated, pre-configured, solidified, or pre-burned.

[0139] The communication methods, terminals, network devices, and communication systems provided in this disclosure will be described in detail below with reference to the accompanying drawings.

[0140] Figure 1 shows a structural diagram of a communication system according to an embodiment of the present disclosure. As shown in Figure 1, the system architecture may include a network device 11 and a terminal 12.

[0141] In some examples, network device 11 can be an entity on the network side used to transmit or receive signals. For example, network device 11 can be a communication satellite, an evolved NodeB (eNB), a transmission reception point (TRP), a next-generation NodeB (gNB) in an NR system, a base station in other future mobile communication systems, or an access node in a wireless fidelity (WiFi) system. The embodiments of this disclosure do not limit the specific technology or device form used in network device 11. The network device 11 provided in the embodiments of this disclosure can be composed of a central unit (CU) and a distributed unit (DU). The CU can also be called a control unit. Using a CU-DU structure allows the protocol layer of a network device, such as a base station, to be separated. Some protocol layer functions are centrally controlled by the CU, while the remaining part or all protocol layer functions are distributed in the DU, which is centrally controlled by the CU.

[0142] In some examples, terminal 12 may be referred to as a terminal device, user equipment, mobile station (MS), mobile terminal device (MT), NB-IoT terminal, etc. Terminal 12 may also be a car with communication capabilities, a smart car, a mobile phone, a wearable device, a tablet computer, a computer with wireless transceiver capabilities, a virtual reality device, an augmented reality device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, a wireless terminal device in a smart home, etc. The embodiments of this disclosure do not limit the specific technology or device form adopted by terminal 12.

[0143] It is understood that the communication system described in this disclosure is for the purpose of more clearly illustrating the technical solutions of this disclosure, and does not constitute a limitation on the technical solutions proposed in this disclosure. As those skilled in the art will know, with the evolution of system architecture and the emergence of new business scenarios, the technical solutions proposed in this disclosure are also applicable to similar technical problems.

[0144] The following embodiments of this disclosure can be applied to the communication system shown in FIG1, or some of the subjects, but are not limited thereto. The subjects shown in FIG1 are illustrative. The communication system may include all or some of the subjects in FIG1, or may include other subjects other than those in FIG1. ​​The number and form of each subject are arbitrary. The connection relationship between the subjects is illustrative. The subjects may not be connected to each other or may be connected in any way. The connection may be direct or indirect, wired or wireless.

[0145] The embodiments disclosed herein can be applied to satellite communications, Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G NR, Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New Radio Access (NX), Future Generation Radio Access (FX), Global System for Mobile Communications (GSM), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), and IEEE 802.20, Ultra-Wideband (UWB), Bluetooth (a registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X) systems, systems utilizing other communication methods, and next-generation systems built upon them, etc. Furthermore, multiple systems can be combined (e.g., a combination of LTE or LTE-A with 5G).

[0146] For far-field terminals, the beams arriving at the terminal from multiple ports have the same direction. However, for near-field terminals, the beam directions arriving at the terminal from different ports are different. Therefore, during beam management, if a base station has 32 transmit beam directions, it only needs to transmit 32 reference signal resources based on those 32 beam directions from any one port. However, for near-field terminals, the distances to the terminal from the first beam direction transmitted by the base station at the first port are different from those from the first beam direction transmitted by the base station at the second port. Therefore, the base station needs to transmit 32 beam directions separately at each port. If the base station still transmits the reference signals for beam measurement using a single-port method, the scanning time for the terminal will increase by a multiple of the number of ports.

[0147] Currently, a multi-port reference signal is provided for base stations. Terminals can measure the Layer 1-Reference Signal Received Power (L1-RSRP) corresponding to different ports of the same reference signal and report each port / port group of each reference signal resource identifier, as well as the corresponding L1-RSRP / Layer 1-Signal-to-Interference-plus-Noise Ratio (L1-SINR). However, if high-frequency bands result in narrower beams and a greater number of beams, how to reduce beam scanning time so that terminals within the coverage area of ​​each beam can obtain service as quickly as possible is a problem that needs to be solved.

[0148] To address the aforementioned issues, this embodiment proposes a method for determining the RO and / or preamble corresponding to the first reference signal when the first reference signal is associated with the second reference signal during fast beam scanning. This reduces beam scanning time while ensuring fast random access.

[0149] Furthermore, to illustrate the specific execution process of the above-described communication system, Figure 2 shows a schematic diagram of a communication method according to an embodiment of this disclosure. The method, applied to the above-described communication system, as shown in Figure 2, may include the following steps:

[0150] Step S201: The network device sends the first information to the terminal.

[0151] In some embodiments, the first information may be an instruction message or a signaling message, etc.

[0152] In some embodiments, the first information is carried by at least one of the following:

[0153] The demodulation reference signal (DMRS) sequence in the SSB; the payload of the PBCH in the SSB, such as the Master Information Block (MIB); the downlink control information (DCI) carried in the common search space type 0 of the control resource set (CORESET) #0; the system information block (SIB) carried in the physical downlink shared channel (PDSCH) scheduled by the DCI in CORESET #0; radio resource control (RRC) messages; medium access control (MAC) control elements (CE), etc.

[0154] Step S202: The terminal receives the first information sent by the network device and determines the first RO and / or the first preamble corresponding to the first reference signal based on the first information.

[0155] In some embodiments, a first reference signal is associated with a second reference signal. In some examples, the terminal may receive at least one first reference signal, and in addition, the terminal may also receive at least one second reference signal, wherein the first reference signal and the second reference signal may be reference signals, and the first reference signal and the second reference signal are different.

[0156] In some examples, the first reference signal may include CSI-RS.

[0157] In some examples, the second reference signal may include the SSB.

[0158] This embodiment proposes a method for determining the RO and / or preamble corresponding to the CSI-RS when the CSI-RS is associated with the SSB in fast beam scanning, thereby reducing beam scanning time while ensuring fast random access.

[0159] In some embodiments, the association between the first reference signal and the second reference signal includes one of the following A1 and B1:

[0160] A1. The second reference signal is associated with multiple first reference signal resources, and one first reference signal corresponds to one first reference signal resource.

[0161] For example, the first reference signal is CSI-RS, the second reference signal is SSB, one SSB is associated with multiple CSI-RS resources, one CSI-RS corresponds to one CSI-RS resource, and each CSI-RS resource corresponds to the same or different beams. Each CSI-RS resource corresponds to different antenna elements or different ports or port groups on the network side. In this embodiment, when one SSB is associated with multiple CSI-RS resources, the first reference signal and the second reference signal can be considered as associated.

[0162] B1. The second reference signal is associated with multiple ports or port groups of a first reference signal resource, and one first reference signal corresponds to one port or port group of a first reference signal resource.

[0163] For example, the first reference signal is CSI-RS, and the second reference signal is SSB. One SSB is associated with multiple ports or port groups of one CSI-RS resource, and one CSI-RS corresponds to one port or port group of one CSI-RS resource. Different ports or port groups correspond to the same or different beams. In this embodiment, when one SSB is associated with multiple ports or port groups of one CSI-RS resource, the first reference signal and the second reference signal can be considered to be associated.

[0164] In some embodiments, the first reference signal and the second reference signal have a QCL relationship. For example, based on the CSI-RS resources associated as shown in A1 and B1 above, when the terminal receives the SSB and the reference signal on the CSI-RS resource associated with the SSB, it does not need to switch the receiving beam. That is, the terminal can consider the CSI-RS and the SSB to have a QCL relationship. This means that the transmission of the CSI-RS is highly correlated or consistent with the SSB in the spatial direction, thereby reducing complexity. The terminal does not need to frequently switch beams when receiving these two signals to optimize the reception quality, reducing the number of beam scans, thereby reducing computational complexity and energy consumption. By utilizing the optimal or near-optimal beam determined during SSB reception, it can be directly applied to the reception of CSI-RS, accelerating the acquisition of channel state information and improving the overall system efficiency and response speed. Furthermore, since the CSI-RS is used to provide downlink channel state information to the network, its reception quality directly affects the selection of modulation and coding schemes and precoding design for subsequent data transmission. QCL relationships ensure that good channel estimation based on SSB beams can be directly applied to CSI-RS, improving the accuracy and reliability of channel state information, thereby optimizing the quality and rate of data transmission.

[0165] In some embodiments, the terminal may determine a second RO and / or a second preamble corresponding to at least one second reference signal. For example, if the second reference signal is an SSB, the terminal may determine a second RO and / or a second preamble corresponding to at least one SSB.

[0166] In some embodiments, the first information may include at least one of the following: A2, B2, C2, D2, E2, F2:

[0167] A2. First Quantity: The first quantity represents the number of resources of the first reference signal resource associated with the second reference signal; for example, if the first reference signal is CSI-RS and the second reference signal is SSB, the first quantity represents the number of CSI-RS resources associated with the SSB. One SSB is associated with multiple CSI-RS resources.

[0168] B2. Second Quantity: The second quantity represents the number of ports or port groups corresponding to the first reference signal resource associated with the second reference signal; for example, if the first reference signal is CSI-RS and the second reference signal is SSB, the second quantity represents the number of ports or port groups corresponding to the CSI-RS resource associated with the SSB. Here, one SSB is associated with multiple ports or port groups of one CSI-RS resource.

[0169] C2. First Identifier: The first identifier represents the identifier of the first reference signal resource corresponding to the first reference signal; for example, if the first reference signal is CSI-RS, the first identifier represents the identifier (index) of the CSI-RS resource corresponding to the CSI-RS. Or, the first identifier represents the number or index (index) of the resource corresponding to the first reference signal among the multiple CSI-RS resources associated with the second reference signal SSB.

[0170] D2. Second identifier: The second identifier represents the port identifier or port group identifier of the first reference signal resource corresponding to the first reference signal; for example, if the first reference signal is CSI-RS, the second identifier represents the port identifier or port group identifier of the CSI-RS resource corresponding to the CSI-RS. Alternatively, the second identifier represents the number or index of the port or port group corresponding to the first reference signal among multiple ports or multiple port groups of the CSI-RS resource associated with the second reference signal SSB.

[0171] E2. First indication, the first indication is used to determine a first ratio of the RO occupied by multiple first reference signal resources associated with the second reference signal to the RO corresponding to the second reference signal; for example, the first reference signal is CSI-RS, the second reference signal is SSB, the first indication is used to determine the ratio of the RO occupied by multiple CSI-RS resources associated with SSB to the RO corresponding to SSB (i.e. the second RO) (i.e. the first ratio), the first ratio can be 100%, 50%, etc.

[0172] F2, Second Indication, the second indication is used to determine a second ratio of the preamble occupied by the multiple first reference signal resources associated with the second reference signal to the preamble corresponding to the second reference signal; for example, the first reference signal is CSI-RS, the second reference signal is SSB, the first indication is used to determine the ratio (i.e. the second ratio) of the preamble occupied by the multiple CSI-RS resources associated with the SSB to the preamble (i.e. the second preamble) corresponding to the SSB, the second ratio can be 100%, 50%, etc.

[0173] In some examples, the second RO may include at least one RO, each RO corresponding to a time-domain and frequency-domain resource. In some examples, the second preamble may include at least one preamble.

[0174] In some embodiments, the first RO may be a subset of the second RO, and the first preamble may be a subset of the second preamble. For example, the first reference signal is CSI-RS, the second reference signal is SSB, the first RO corresponding to CSI-RS is a subset of the second RO corresponding to SSB, that is, the first RO is within the second RO or the two are the same; the first preamble corresponding to CSI-RS is a subset of the second preamble corresponding to SSB, and the first preamble is within the second preamble or the two are the same.

[0175] In some embodiments, if condition A1 above is met, i.e., the second reference signal is associated with multiple first reference signal resources and one first reference signal corresponds to one first reference signal resource, then the terminal determines the first RO and / or the first preamble corresponding to the first reference signal based on the first information, including: dividing at least a portion of the second RO and / or the second preamble into a first number of parts, and determining the first RO and / or the first preamble corresponding to the first reference signal as the Nth part, wherein the value of N is determined based on the first reference signal resource identifier of the first reference signal. This identifier can be used to identify the corresponding first reference signal resource.

[0176] In some examples, for multiple second ROs, at least a portion may include all or part of the second ROs, wherein the part of the second ROs may be divided according to a first ratio (which can be determined by E2 above), such as if the second RO includes 4 ROs, then taking 1 / 2 would result in 2 of them. For multiple second preambles, at least a portion may include all or part of the second preambles, wherein the part of the second preambles may be divided according to a second ratio (which can be determined by F2 above), such as if the second preamble includes 64 preambles, then taking 1 / 2 would result in 32 of them.

[0177] In some examples, the first proportion of the second RO (which can be determined by E2 above) can be divided into a first number (which can be determined by A2 above), and the first RO corresponding to the first reference signal can be determined as the Nth part therein, wherein the value of N is determined based on the first identifier (which can be determined by C2 above); and / or, the second proportion of the second preamble (which can be determined by F2 above) can be divided into a first number (which can be determined by A2 above), and the first preamble corresponding to the first reference signal can be determined as the Nth part therein, wherein the value of N is determined based on the first identifier (which can be determined by C2 above).

[0178] For example, if the first reference signal is CSI-RS and the second reference signal is SSB, when one SSB is associated with multiple CSI-RS resources and one CSI-RS corresponds to one CSI-RS resource, there are multiple implementation methods. The first RO and first preamble corresponding to each CSI-RS resource can be determined, thereby determining the first RO or first preamble corresponding to each CSI-RS. Taking this as an example, the second RO corresponding to the SSB may include two ROs, the second preamble corresponding to the SSB may include 32 preambles, and the number of CSI-RS resources is four.

[0179] In one implementation (x1), the first ratio is 100%, meaning all two Returns (ROs) corresponding to the SSB are allocated to four CSI-RS resources. Specifically, the first and second CSI-RS resources share the first RO of the two ROs, each corresponding to one of the 16 different preambles out of 32. Similarly, the third and fourth CSI-RS resources share the second RO of the two ROs, also each corresponding to one of the 16 different preambles out of 32.

[0180] The above implementation is equivalent to allocating the second RO and the second preamble to the four CSI-RS resources. As another implementation (y1), the four CSI-RS resources can be allocated only a portion of the second RO and the second preamble: for example, if the four CSI-RS resources can allocate 1 / 2 of the second RO and the second preamble (i.e., the first ratio is 50%), then the four CSI-RS resources share one of the two ROs, and each CSI-RS resource occupies eight different preambles out of the 32 preambles. The remaining RO and the corresponding 32 preambles are reserved for other uses, such as for use by far-field terminals.

[0181] In some examples, if the number of second ROs is a multiple of the number of first ROs (the number of resources of the first reference signal resources), then each first reference signal resource can correspond to a different RO. If the number of second ROs is less than the number of first ROs, then multiple first reference signals can share a single RO and use different preambles.

[0182] For example, if the first reference signal is CSI-RS and the second reference signal is SSB, when an SSB is associated with multiple CSI-RS resources and one CSI-RS corresponds to one CSI-RS resource, if the number of second ROs corresponding to the SSB (e.g., 8 ROs) is a multiple of the number of CSI-RS resources (e.g., 4 CSI-RS resources), then each of the 4 CSI-RS resources can correspond to a different RO among the 8 ROs; if the number of second ROs corresponding to the SSB (e.g., 2 ROs) is less than the number of CSI-RS resources (e.g., 4 CSI-RS resources), then multiple CSI-RS resources among the 4 CSI-RS resources can share one of the 2 ROs and use different preambles, such as the first CSI-RS resource and the second CSI-RS resource among the 4 CSI-RS resources sharing the first RO among the 2 ROs, etc.

[0183] In some embodiments, if condition B1 above is met, i.e., the second reference signal is associated with multiple ports or port groups of a first reference signal resource, and one first reference signal corresponds to one port or port group of a first reference signal resource, then the terminal determines the first RO and / or the first preamble corresponding to the first reference signal based on the first information, including: dividing at least a portion of the second RO and / or the second preamble into a second number of parts, and determining the first RO and / or the first preamble corresponding to the first reference signal as the Mth part therein, wherein the value of M is determined based on the identifier of the port or port group corresponding to the first reference signal. This identifier can be used to identify the corresponding port or port group.

[0184] In some examples, for multiple second ROs, at least a portion may include all or part of the second ROs, wherein the part of the second ROs may be divided according to a first ratio (which may be determined by E2 above). For multiple second preambles, at least a portion may include all or part of the second preambles, wherein the part of the second preambles may be divided according to a second ratio (which may be determined by F2 above).

[0185] In some examples, a first proportion of the second RO (which can be determined by E2 above) is divided into a second number (which can be determined by B2 above), and the first RO corresponding to the first reference signal is determined as the Mth part thereof, wherein the value of M is determined based on the second identifier (which can be determined by D2 above); and / or, a second proportion of the second preamble (which can be determined by F2 above) is divided into a second number (which can be determined by B2 above), and the first preamble corresponding to the first reference signal is determined as the Mth part thereof, wherein the value of M is determined based on the second identifier (which can be determined by D2 above).

[0186] For example, if the first reference signal is CSI-RS and the second reference signal is SSB, when an SSB is associated with multiple ports of a CSI-RS resource, there are multiple implementation methods. The first RO and first preamble corresponding to each port can be determined, thereby determining the first RO or first preamble corresponding to each CSI-RS. Taking this example, the second RO corresponding to an SSB may include two ROs, the second preamble corresponding to an SSB may include 32 preambles, and the number of ports corresponding to one CSI-RS resource is four.

[0187] As one implementation method, x2, the first ratio is 100%, meaning that all of the 2 ROs corresponding to the SSB are distributed to the 4 ports. Among them, the first and second ports share the first RO of the 2 ROs, and each corresponds to 16 different preambles out of 32 preambles; while the third and fourth ports share the second RO of the 2 ROs, and each corresponds to 16 different preambles out of 32 preambles.

[0188] The above implementation is equivalent to allocating the second RO and the second preamble to the four ports. As another implementation (y2), the four ports can allocate only a portion of the second RO and the second preamble: for example, if the four ports can allocate 1 / 2 of the second RO and the second preamble (i.e., the first ratio is 50%), then the four ports share one of the two ROs, and each port occupies 8 different preambles out of the 32 preambles. The remaining RO and the corresponding 32 preambles are reserved for other uses, such as for use by far-field terminals.

[0189] In some examples, if the number of second ROs is a multiple of the second number (the number of ports or port groups corresponding to the first reference signal resources), then each port or port group can correspond to a different RO. If the number of second ROs is less than the second number, then multiple first reference signals can share a single RO and use different preambles.

[0190] For example, if the first reference signal is CSI-RS and the second reference signal is SSB, when an SSB is associated with multiple ports of a CSI-RS resource, if the number of second ROs corresponding to the SSB (e.g., 8 ROs) is a multiple of the number of ports of the CSI-RS resource (e.g., 4 ports), then each of the 4 ports can correspond to a different RO among the 8 ROs; if the number of second ROs corresponding to the SSB (e.g., 2 ROs) is less than the number of ports of the CSI-RS resource (e.g., 4 ports), then multiple ports among the 4 ports can share one of the 2 ROs and use different preambles, such as the first port and the second port among the 4 ports sharing the first RO among the 2 ROs, etc.

[0191] This embodiment proposes a method for determining the RO and / or preamble corresponding to the first reference signal when the first reference signal is associated with the second reference signal in fast beam scanning, thereby reducing beam scanning time while ensuring fast random access.

[0192] To illustrate the specific execution process of the terminal, Figure 3 shows a flowchart of a communication method according to an embodiment of this disclosure. When applied to the terminal side, the method may include the following steps.

[0193] Step S301: The terminal determines the first information.

[0194] In some embodiments, the first information may be determined based on a protocol agreement, and the first information may be used to determine the first RO and / or the first preamble corresponding to the first reference signal.

[0195] In some embodiments, the first information may be indicated by a network device. Accordingly, the terminal determining the first information may include: the terminal receiving the first information sent by the network device, which may be used for the first RO and / or the first preamble corresponding to the first reference signal.

[0196] In some examples, the receiving network device sends the first message via at least one of the following:

[0197] The DMRS sequence in the SSB; the payload of the PBCH in the SSB; downlink control information; SIB information, etc.

[0198] Step S302: The terminal determines the first RO and / or the first preamble corresponding to the first reference signal based on the first information.

[0199] In some embodiments, the first reference signal is associated with the second reference signal.

[0200] In some embodiments, the first reference signal includes CSI-RS.

[0201] In some embodiments, the second reference signal includes the SSB.

[0202] In some embodiments, the association between the first reference signal and the second reference signal includes one of the following A1 to B1:

[0203] A1. The second reference signal is associated with multiple first reference signal resources, and one first reference signal corresponds to one first reference signal resource;

[0204] B1. The second reference signal is associated with multiple ports or port groups of a first reference signal resource, and one first reference signal corresponds to one port or port group of a first reference signal resource.

[0205] In some embodiments, the first information includes at least one of the following A2 to F2:

[0206] A2. First quantity, where the first quantity represents the number of resources of the first reference signal resource associated with the second reference signal;

[0207] B2. Second quantity, the second quantity represents the number of ports or port groups corresponding to the first reference signal resource associated with the second reference signal;

[0208] C2, First identifier, wherein the first identifier represents the identifier of the first reference signal resource corresponding to the first reference signal;

[0209] D2, Second Identifier, whereby the second identifier represents the port identifier or port group identifier of the first reference signal resource corresponding to the first reference signal;

[0210] E2, First indication, the first indication is used to determine a first ratio of the RO occupied by the plurality of first reference signal resources associated with the second reference signal to the RO corresponding to the second reference signal;

[0211] F2, Second Indication, the second indication is used to determine a second ratio of the preamble occupied by the plurality of first reference signal resources associated with the second reference signal to the preamble corresponding to the second reference signal.

[0212] In some embodiments, the terminal receives at least one second reference signal sent by the network device; and determines a second RO and / or a second preamble corresponding to the at least one second reference signal.

[0213] In some embodiments, the second RO includes at least one RO, and the second preamble includes at least one preamble.

[0214] In some embodiments, the first RO is a subset of the second RO, and the first preamble is a subset of the second preamble.

[0215] In some embodiments, the terminal determines the first RO and / or the first preamble corresponding to the first reference signal based on the first information, including: dividing the first proportional portion of the second RO into the first number of parts, and determining the first RO corresponding to the first reference signal as the Nth part therein, wherein the value of N is determined based on the first identifier; and / or dividing the second proportional portion of the second preamble into the first number of parts, and determining the first preamble corresponding to the first reference signal as the Nth part therein, wherein the value of N is determined based on the first identifier.

[0216] In some embodiments, the terminal determines the first RO and / or the first preamble corresponding to the first reference signal based on the first information, including: dividing the first proportional portion of the second RO into the second number of parts, and determining the first RO corresponding to the first reference signal as the Mth part therein, wherein the value of M is determined based on the second identifier; and / or dividing the second proportional portion of the second preamble into the second number of parts, and determining the first preamble corresponding to the first reference signal as the Mth part therein, wherein the value of M is determined based on the second identifier.

[0217] In some embodiments, the first reference signal and the second reference signal have a QCL relationship.

[0218] For a detailed description of the specific examples in this embodiment, please refer to the corresponding descriptions of the embodiments in Figures 1 and 2, which will not be repeated here.

[0219] This embodiment proposes a method for determining the RO and / or preamble corresponding to the first reference signal when the first reference signal is associated with the second reference signal in fast beam scanning, thereby reducing beam scanning time while ensuring fast random access.

[0220] Figure 4 shows a flowchart of a communication method according to an embodiment of the present disclosure. As shown in Figure 4, the method is applied to the network device side and may include the following steps.

[0221] Step S401: The network device sends the first information to the terminal.

[0222] In some embodiments, the first information can be used to determine the first RO and / or the first preamble corresponding to the first reference signal, wherein the first reference signal is associated with the second reference signal.

[0223] In some embodiments, the first reference signal includes CSI-RS.

[0224] In some embodiments, the second reference signal includes the SSB.

[0225] In some embodiments, the association between the first reference signal and the second reference signal includes one of the following A1 to B1:

[0226] A1. The second reference signal is associated with multiple first reference signal resources, and one first reference signal corresponds to one first reference signal resource;

[0227] B1. The second reference signal is associated with multiple ports or port groups of a first reference signal resource, and one first reference signal corresponds to one port or port group of a first reference signal resource.

[0228] In some embodiments, the network device may send first information to the terminal via at least one of the following:

[0229] The DMRS sequence in the SSB; the payload of the PBCH in the SSB; downlink control information; SIB information, etc.

[0230] In some embodiments, the first information includes at least one of the following A2 to F2:

[0231] A2. First quantity, where the first quantity represents the number of resources of the first reference signal resource associated with the second reference signal;

[0232] B2. Second quantity, the second quantity represents the number of ports or port groups corresponding to the first reference signal resource associated with the second reference signal;

[0233] C2, First identifier, wherein the first identifier represents the identifier of the first reference signal resource corresponding to the first reference signal;

[0234] D2, Second Identifier, whereby the second identifier represents the port identifier or port group identifier of the first reference signal resource corresponding to the first reference signal;

[0235] E2, First indication, the first indication is used to determine a first ratio of the RO occupied by the plurality of first reference signal resources associated with the second reference signal to the RO corresponding to the second reference signal;

[0236] F2, Second Indication, the second indication is used to determine a second ratio of the preamble occupied by the plurality of first reference signal resources associated with the second reference signal to the preamble corresponding to the second reference signal.

[0237] In some embodiments, the network device sends at least one second reference signal to the terminal; wherein the at least one second reference signal corresponds to a second RO and / or a second preamble.

[0238] In some embodiments, the second RO includes at least one RO, and the second preamble includes at least one preamble.

[0239] In some embodiments, the first RO is a subset of the second RO, and the first preamble is a subset of the second preamble.

[0240] In some embodiments, the first information is used to instruct the first proportional portion of the second RO to be divided into the first number of parts, and to determine the first RO corresponding to the first reference signal as the Nth part therein, wherein the value of N is determined based on the first identifier; and / or, to divide the second proportional portion of the second preamble into the first number of parts, and to determine the first preamble corresponding to the first reference signal as the Nth part therein, wherein the value of N is determined based on the first identifier.

[0241] In some embodiments, the first information is used to instruct the first proportional portion of the second RO to be divided into the second number of parts, and to determine the first RO corresponding to the first reference signal as the Mth part therein, wherein the value of M is determined based on the second identifier; and / or, to divide the second proportional portion of the second preamble into the second number of parts, and to determine the first preamble corresponding to the first reference signal as the Mth part therein, wherein the value of M is determined based on the second identifier.

[0242] In some embodiments, the first reference signal and the second reference signal have a QCL relationship.

[0243] For specific examples in this embodiment, please refer to the corresponding descriptions of the embodiments in Figures 1 to 3, which will not be repeated here.

[0244] This embodiment proposes a method for determining the RO and / or preamble corresponding to the first reference signal when the first reference signal is associated with the second reference signal in fast beam scanning, thereby reducing beam scanning time while ensuring fast random access.

[0245] This disclosure also provides an apparatus for implementing any of the above methods. For example, an apparatus is provided that includes units or modules for implementing the steps performed by the terminal in any of the above methods. Alternatively, another apparatus is provided that includes units or modules for implementing the steps performed by a network device (e.g., an access network device, a core network functional node, a core network device, etc.) in any of the above methods.

[0246] It should be understood that the division of units or modules in the above device is only a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. Furthermore, the units or modules in the device can be implemented by a processor calling software: for example, the device includes a processor connected to a memory containing instructions. The processor calls the instructions stored in the memory to implement any of the above methods or to implement the functions of the units or modules in the above device. The processor can be, for example, a general-purpose processor, such as a Central Processing Unit (CPU) or a microprocessor, and the memory can be internal or external to the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits. The functionality of some or all of the units or modules can be achieved through the design of these hardware circuits, which can be understood as one or more processors. For example, in one implementation, the hardware circuit is an application-specific integrated circuit (ASIC). The functionality of some or all of the units or modules is achieved through the design of the logical relationships between the components within the circuit. In another implementation, the hardware circuit can be implemented using a programmable logic device (PLD). Taking a field-programmable gate array (FPGA) as an example, it can include a large number of logic gates. The connection relationships between the logic gates are configured through configuration files, thereby achieving the functionality of some or all of the units or modules. All units or modules of the above device can be implemented entirely through processor-called software, entirely through hardware circuits, or partially through processor-called software with the remaining parts implemented through hardware circuits.

[0247] In this embodiment, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction read and execute capabilities, such as a Central Processing Unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationships of hardware circuits. The logical relationships of the aforementioned hardware circuits are fixed or reconfigurable. For example, the processor is a hardware circuit implemented using an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and configuring the hardware circuit can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. Furthermore, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a Neural Network Processing Unit (NPU), a Tensor Processing Unit (TPU), or a Deep Learning Processing Unit (DPU).

[0248] Figure 5 is a schematic diagram of the structure of a terminal proposed in an embodiment of this disclosure. As shown in Figure 5, the terminal may include a processing module 51. In some embodiments, the processing module 51 is used to execute at least one of the communication steps (e.g., steps S301 to S302, but not limited thereto) performed by the terminal in any of the above methods, which will not be described in detail here.

[0249] Figure 6 is a schematic diagram of the structure of a network device proposed in an embodiment of this disclosure. As shown in Figure 6, the network device may include a transceiver module 61. In some embodiments, the transceiver module 61 is used to perform at least one of the communication steps (e.g., step S401, but not limited thereto) performed by the network device in any of the above methods, which will not be described in detail here.

[0250] In some embodiments, the processing module 51 may be a single module or may include multiple sub-modules. Optionally, the multiple sub-modules may each perform all or part of the steps required by the processing module. Optionally, the processing module 51 may be interchangeable with a processor.

[0251] In some embodiments, the transceiver module 61 may be separate or integrated, such as including a receiving module and / or a transmitting module. Optionally, the transceiver module 61 may be interchangeable with a transceiver.

[0252] Figure 7 is a schematic diagram of the structure of the communication device 8100 proposed in an embodiment of this disclosure. The communication device 8100 can be a network device (e.g., access network device, core network device, etc.), a terminal (e.g., user equipment, etc.), a chip, chip system, or processor that supports the network device in implementing any of the above methods, or a chip, chip system, or processor that supports the terminal in implementing any of the above methods. The communication device 8100 can be used to implement the methods described in the above method embodiments; for details, please refer to the descriptions in the above method embodiments.

[0253] As shown in Figure 7, the communication device 8100 includes one or more processors 8101. The processor 8101 can be a general-purpose processor or a dedicated processor, such as a baseband processor or a central processing unit (CPU). The baseband processor can be used to process communication protocols and communication data, while the CPU can be used to control the communication device (e.g., base station, baseband chip, terminal device, terminal device chip, DU or CU, etc.), execute programs, and process program data. Optionally, the communication device 8100 can be used to execute any of the above methods. Optionally, one or more processors 8101 can be used to invoke instructions to cause the communication device 8100 to execute any of the above methods.

[0254] In some embodiments, the communication device 8100 further includes one or more transceivers 8102. When the communication device 8100 includes one or more transceivers 8102, the transceivers 8102 perform the communication steps such as sending and / or receiving in the above method, and the processor 8101 performs at least one of the other steps. In optional embodiments, the transceiver may include a receiver and / or a transmitter, which may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, interface, etc., can be used interchangeably; the terms transmitter, sending unit, transmitter, sending circuit, etc., can be used interchangeably; and the terms receiver, receiving unit, receiver, receiving circuit, etc., can be used interchangeably.

[0255] In some embodiments, the communication device 8100 further includes one or more memories 8103 for storing data. Optionally, all or part of the memories 8103 may be located outside the communication device 8100. In an optional embodiment, the communication device 8100 may include one or more interface circuits 8104. Optionally, the interface circuits 8104 are connected to the memories 8102, and the interface circuits 8104 can be used to receive data from the memories 8102 or other devices, and can be used to send data to the memories 8102 or other devices. For example, the interface circuits 8104 can read data stored in the memories 8102 and send the data to the processor 8101.

[0256] The communication device 8100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 8100 described in this disclosure is not limited thereto, and the structure of the communication device 8100 may not be limited by FIG. 7. The communication device may be a standalone device or a part of a larger device. For example, the communication device may be: (1) a standalone integrated circuit IC, or chip, or chip system or subsystem; (2) a collection of one or more ICs, optionally, the IC collection may also include storage components for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, terminal device, smart terminal device, cellular phone, wireless device, handheld device, mobile unit, vehicle device, network device, cloud device, artificial intelligence device, etc.; (6) others, etc.

[0257] Figure 8 is a schematic diagram of the structure of chip 8200 according to an embodiment of this disclosure. For cases where the communication device 8100 can be a chip or a chip system, please refer to the schematic diagram of chip 8200 shown in Figure 8, but it is not limited thereto.

[0258] Chip 8200 includes one or more processors 8201. Chip 8200 is used to perform any of the methods described above.

[0259] In some embodiments, chip 8200 further includes one or more interface circuits 8202. Optionally, terms such as interface circuit, interface, and transceiver pin can be used interchangeably. In some embodiments, chip 8200 further includes one or more memories 8203 for storing data. Optionally, all or part of the memories 8203 may be located outside of chip 8200. Optionally, interface circuit 8202 is connected to memory 8203, and interface circuit 8202 can be used to receive data from memory 8203 or other devices, and interface circuit 8202 can be used to send data to memory 8203 or other devices. For example, interface circuit 8202 can read data stored in memory 8203 and send the data to processor 8201.

[0260] In some embodiments, the interface circuit 8202 performs at least one of the communication steps, such as sending and / or receiving, in the above-described method. For example, the interface circuit 8202 performing the communication steps, such as sending and / or receiving, in the above-described method refers to the interface circuit 8202 performing data interaction between the processor 8201, the chip 8200, the memory 8203, or the transceiver device. In some embodiments, the processor 8201 performs at least one of the communication method steps described above.

[0261] The modules and / or devices described in the various embodiments, such as virtual devices, physical devices, and chips, can be combined or separated arbitrarily as needed. Optionally, some or all steps can also be performed collaboratively by multiple modules and / or devices, which is not limited here.

[0262] This disclosure also proposes a storage medium storing instructions that, when executed on a communication device 8100, cause the communication device 8100 to perform any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but not limited thereto; it may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but not limited thereto; it may also be a temporary storage medium.

[0263] This disclosure also provides a program product that, when executed by the communication device 8100, causes the communication device 8100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0264] This disclosure also proposes a computer program that, when run on a computer, causes the computer to perform any of the above methods.

Claims

A communication method, characterized in that, The method, executed by a terminal, includes: Determine the first piece of information; Based on the first information, a first random access timing (RO) and / or a first preamble corresponding to the first reference signal are determined, wherein the first reference signal is associated with a second reference signal. The method according to claim 1, characterized in that, The first reference signal includes the Channel State Information Reference Signal (CSI-RS). The method according to any one of claims 1 to 2, characterized in that, The second reference signal includes a synchronization signal block (SSB). The method according to any one of claims 1 to 3 is characterized in that, The association between the first reference signal and the second reference signal includes one of the following: The second reference signal is associated with multiple first reference signal resources, and one first reference signal corresponds to one first reference signal resource; The second reference signal is associated with multiple ports or port groups of a first reference signal resource, and one first reference signal corresponds to one port or port group of the first reference signal resource. The method according to claim 4, characterized in that, The first information includes at least one of the following: The first quantity represents the number of resources of the first reference signal resource associated with the second reference signal; The second quantity represents the number of ports or port groups corresponding to the first reference signal resource associated with the second reference signal. The first identifier represents the identifier of the first reference signal resource corresponding to the first reference signal; The second identifier represents the port identifier or port group identifier of the first reference signal resource corresponding to the first reference signal; A first instruction is used to determine a first ratio of the RO occupied by a plurality of first reference signal resources associated with the second reference signal to the RO corresponding to the second reference signal; The second instruction is used to determine a second ratio between the preamble occupied by the plurality of first reference signal resources associated with the second reference signal and the preamble corresponding to the second reference signal. The method according to claim 5, characterized in that, The method further includes: Determine at least one second RO and / or second preamble corresponding to the second reference signal. The method according to claim 6, characterized in that, The second RO includes at least one RO, and the second preamble includes at least one preamble. The method according to claim 7, characterized in that, The first RO is a subset of the second RO, and the first preamble is a subset of the second preamble. The method according to claim 8, characterized in that, Determining the first RO and / or the first preamble corresponding to the first reference signal based on the first information includes: Divide the first proportional portion of the second RO into the first number of parts, and determine the first RO corresponding to the first reference signal as the Nth part of the first number of parts, wherein the value of N is determined based on the first identifier; and / or, The second proportional portion of the second preamble is divided into the first number of parts, and the first preamble corresponding to the first reference signal is determined to be the Nth part of the first number of parts, wherein the value of N is determined based on the first identifier. The method according to claim 8, characterized in that, Determining the first RO and / or the first preamble corresponding to the first reference signal based on the first information includes: Divide the first proportional portion of the second RO into the second number of parts, and determine the first RO corresponding to the first reference signal as the Mth part of the second number of parts, where the value of M is determined based on the second identifier; and / or, The second proportional portion of the second preamble is divided into the second number of parts, and the first preamble corresponding to the first reference signal is determined to be the Mth part of the second number of parts, wherein the value of M is determined based on the second identifier. The method according to any one of claims 1 to 10, characterized in that, The determination of the first information includes: The first information is determined based on the protocol agreement, and / or the first information is received from the network device through at least one of the following: The demodulation reference signal DMRS sequence in SSB; The payload of the Physical Broadcast Channel (PBCH) in the SSB; Downlink control information; System message block (SIB) information. The method according to any one of claims 1 to 11, characterized in that, The first reference signal and the second parameter The QCL relationship is based on the reference signal. A communication method, characterized in that, Performed by a network device, the method includes: Send the first message to the terminal; The first information is used to determine the first random access timing (RO) and / or the first preamble corresponding to the first reference signal, wherein the first reference signal is associated with the second reference signal. The method according to claim 13, characterized in that, The first reference signal includes the Channel State Information Reference Signal (CSI-RS). The method according to any one of claims 13 to 14 is characterized in that, The second reference signal includes a synchronization signal block (SSB). The method according to any one of claims 14 to 15 is characterized in that, The association between the first reference signal and the second reference signal includes one of the following: The second reference signal is associated with multiple first reference signal resources, and one first reference signal corresponds to one first reference signal resource; The second reference signal is associated with multiple ports or port groups of a first reference signal resource, and one first reference signal corresponds to one port or port group of the first reference signal resource. The method according to claim 16, characterized in that, The first information includes at least one of the following: The first quantity represents the number of resources of the first reference signal resource associated with the second reference signal; The second quantity represents the number of ports or port groups corresponding to the first reference signal resource associated with the second reference signal. The first identifier represents the identifier of the first reference signal resource corresponding to the first reference signal; The second identifier represents the port identifier or port group identifier of the first reference signal resource corresponding to the first reference signal; A first instruction is used to determine a first ratio of the RO occupied by a plurality of first reference signal resources associated with the second reference signal to the RO corresponding to the second reference signal; The second instruction is used to determine a second ratio between the preamble occupied by the plurality of first reference signal resources associated with the second reference signal and the preamble corresponding to the second reference signal. The method according to claim 17, characterized in that, At least one of the second reference signals corresponds to a second RO and / or a second preamble. The method according to claim 18, characterized in that, The second RO includes at least one RO, and the second preamble includes at least one preamble. The method according to claim 19, characterized in that, The first RO is a subset of the second RO, and the first preamble is a subset of the second preamble. The method according to claim 20, characterized in that, The first information is used to instruct the first proportional portion of the second RO to be divided into the first number of parts, and to determine that the first RO corresponding to the first reference signal is the Nth part of the first number of parts, wherein the value of N is determined based on the first identifier; and / or, The second proportional portion of the second preamble is divided into the first number of parts, and the first preamble corresponding to the first reference signal is determined to be the Nth part of the first number of parts, wherein the value of N is determined based on the first identifier. The method according to claim 20, characterized in that, The first information is used to instruct the first proportional portion of the second RO to be divided into the second number of parts, and to determine that the first RO corresponding to the first reference signal is the Mth part of the second number of parts, wherein the value of M is determined based on the second identifier; and / or, The second proportional portion of the second preamble is divided into the second number of parts, and the first preamble corresponding to the first reference signal is determined to be the Mth part of the second number of parts, wherein the value of M is determined based on the second identifier. The method according to any one of claims 13 to 22 is characterized in that, The first information is sent to the terminal by at least one of the following: The demodulation reference signal DMRS sequence in SSB; The payload of the Physical Broadcast Channel (PBCH) in the SSB; Downlink control information; System message block (SIB) information. The method according to any one of claims 13 to 23 is characterized in that, The first reference signal and the second reference signal are in a quasi-co-address (QCL) relationship. A communication method, characterized in that, include: The network device sends the first information to the terminal; The terminal receives the first information and determines the first random access timing (RO) and / or the first preamble corresponding to the first reference signal based on the first information, wherein the first reference signal is associated with the second reference signal. A terminal, characterized in that, include: The processing module is configured to determine the first piece of information; Based on the first information, the first random access timing (RO) and / or the first preamble corresponding to the first reference signal are determined, wherein the first reference signal is associated with the second reference signal. A network device, characterized in that, include: The transceiver module is configured to send first information to the terminal; wherein the first information is used to determine the first random access timing (RO) and / or the first preamble corresponding to the first reference signal, wherein the first reference signal is associated with the second reference signal. A communication system, characterized in that, Including terminals and network equipment, among which, The network device is configured to send first information to the terminal; The terminal is configured to receive the first information and determine, based on the first information, a first random access timing (RO) and / or a first preamble corresponding to a first reference signal, wherein the first reference signal is associated with a second reference signal. A communication device, characterized in that, include: One or more processors; The processor is used to execute the method according to any one of claims 1 to 24. A computer storage medium, wherein, The computer storage medium stores computer-executable instructions; when executed by a processor, the computer-executable instructions can implement the method of any one of claims 1 to 24. A computer program product includes a computer program that, when executed by a processor, enables the implementation of the method according to any one of claims 1 to 24.

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