Access method, communication device, communication system and storage medium

Abstract

The present disclosure provides an access method, a communication device, a communication system and a storage medium. The method comprises: determining a first random access channel occasion (RO) resource set, the first RO resource set comprising at least one first RO resource, and the first RO resource being an RO resource capable of implementing communication among RO resources associated with a synchronization signal block (SSB) burst set; and on the basis of the first RO resource in the first RO resource set, sending a random access request to a network device. The method of the present disclosure ensures accurate sending of the random access request, ensures the access success rate and access efficiency, and also ensures communication performance.

Description

Access method, communication equipment, communication system, storage medium Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to access methods, communication equipment, communication systems, and storage media. Background Technology

[0002] In a communication system, network devices send Synchronization Signal Block (SSB) bursts to terminals. An SSB burst can contain multiple SSBs, and the terminal can achieve time-frequency synchronization based on these SSBs. In some embodiments, an SSB burst is associated with at least one Random Access Channel Occasion (RO) resource. After receiving an SSB burst, the terminal can send a random access request to the network device based on the RO resource associated with the SSB burst. Summary of the Invention

[0003] This disclosure proposes an access method, communication equipment, communication system, and storage medium.

[0004] According to a first aspect of the present disclosure, an access method is proposed, executed by a terminal, comprising: determining a first random access opportunity (RO) resource set, the first RO resource set including at least one first RO resource, wherein the first RO resource is: an RO resource that can achieve communication among the RO resources associated with the SSB burst set of the synchronization signal block (SSB), or the first RO resource can be: an RO resource that can achieve communication among the RO resources associated with each SSB index in the SSB burst; and sending a random access request to a network device based on the first RO resource in the first RO resource set.

[0005] According to a second aspect of the present disclosure, an access method is proposed, executed by a network device, the method comprising: receiving a random access request sent by a terminal based on a first RO resource in a first random access opportunity RO resource set; wherein the first RO resource set includes at least one first RO resource, the first RO resource being: a RO resource that can achieve communication among the RO resources associated with a synchronization signal block SSB burst set burst, or the first RO resource being: a RO resource that can achieve communication among the RO resources associated with each SSB index in the SSB burst.

[0006] According to a third aspect of the present disclosure, a terminal is provided, comprising: a processing module, configured to determine a first random access opportunity (RO) resource set, the first RO resource set including at least one first RO resource, wherein the first RO resource is: an RO resource that can achieve communication among the RO resources associated with the SSB burst set of the synchronization signal block (SSB), or the first RO resource can be: an RO resource that can achieve communication among the RO resources associated with each SSB index in the SSB burst; and a transceiver module, configured to send a random access request to a network device based on the first RO resource in the first RO resource set.

[0007] According to a fourth aspect of the present disclosure, a network device is provided, comprising: a transceiver module, configured to receive a random access request sent by a terminal based on a first RO resource in a first random access opportunity RO resource set; wherein the first RO resource set includes at least one first RO resource, the first RO resource being: a RO resource that can achieve communication among the RO resources associated with a synchronization signal block SSB burst set burst, or the first RO resource being: a RO resource that can achieve communication among the RO resources associated with each SSB index in the SSB burst.

[0008] According to a fifth aspect of the embodiments of this disclosure, a communication device is provided, comprising:

[0009] One or more processors;

[0010] The processor is configured to invoke instructions to cause the communication device to execute any of the access methods described in the first or second aspect.

[0011] According to a sixth aspect of the present disclosure, a communication system is provided, including a terminal and a network device, wherein the terminal is configured to implement the access method described in the first aspect, and the network device is configured to implement the access method described in the second aspect.

[0012] According to a seventh aspect of the present disclosure, a storage medium is provided that stores instructions, which, when executed on a communication device, cause the communication device to perform an access method as described in any of the first to second aspects.

[0013] According to an eighth aspect of the present disclosure, the present disclosure provides a program product including a computer program that, when executed by a communication device, implements the access method as described in any of the first to second aspects.

[0014] According to a ninth aspect of the present disclosure, the present disclosure provides a computer program that, when run on a computer, causes the computer to perform the access method as described in any of the first to second aspects.

[0015] It is understood that the aforementioned terminals, network devices, communication devices, communication systems, storage media, program products, and computer programs 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. Attached Figure Description

[0016] 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:

[0017] Figure 1A is a schematic diagram of the architecture of the communication system provided in an embodiment of this disclosure;

[0018] Figure 1B is a schematic diagram illustrating the relationship between SSB bursts and RO resources according to an embodiment of the present disclosure;

[0019] Figures 2A-2C are interactive schematic diagrams illustrating the access method according to embodiments of the present disclosure;

[0020] Figure 2D is a schematic diagram of the first beam pattern shown in this disclosure;

[0021] Figure 2E is a schematic diagram of the second beam pattern disclosed in this disclosure;

[0022] Figure 3A is a flowchart illustrating an access method provided in an embodiment of this disclosure;

[0023] Figure 3B is a flowchart illustrating the access method provided in another embodiment of this disclosure;

[0024] Figure 4A is a schematic diagram of the structure of a terminal provided in an embodiment of this disclosure;

[0025] Figure 4B is a schematic diagram of the structure of a network device provided in an embodiment of this disclosure;

[0026] Figure 5A is a schematic diagram of the structure of a communication device provided in an embodiment of this disclosure;

[0027] Figure 5B is a schematic diagram of the structure of a chip provided in an embodiment of this disclosure. Detailed Implementation

[0028] This disclosure provides an access method, communication device, communication system, and storage medium.

[0029] In a first aspect, embodiments of this disclosure propose an access method executed by a terminal. The method includes: determining a first random access opportunity RO resource set, the first RO resource set including at least one first RO resource, the first RO resource being: a RO resource that can achieve communication among the RO resources associated with the SSB burst set of the synchronization signal block (SSB), or the first RO resource being: a RO resource that can achieve communication among the RO resources associated with each SSB index in the SSB burst; and sending a random access request to a network device based on the first RO resource in the first RO resource set.

[0030] In the above embodiments, the terminal can determine the RO resources that can communicate among the RO resources associated with the SSB burst, and send a random access request to the network device based on these RO resources. This avoids the situation where "the terminal cannot know which RO resources can communicate and which cannot communicate among the RO resources associated with the SSB burst, and therefore selects RO resources that cannot communicate to send the random access request, resulting in the failure of the random access request to be sent". Therefore, this disclosure can ensure the accurate sending of the random access request, guarantee the access success rate and access efficiency, and ensure communication performance.

[0031] In conjunction with some embodiments of the first aspect, in some embodiments, determining the first random access opportunity (RO) resource set includes: receiving first information sent by a network device, the first information being used to indicate the first RO resource set; and determining the first RO resource set based on the first information.

[0032] In conjunction with some embodiments of the first aspect, in some embodiments, the first information is used for at least one of the following: indicating the first RO resource set with the granularity of the Random Access Channel (RACH) configuration period; indicating the first RO resource set with the granularity of the SSB burst length; indicating the first RO resource set with the granularity of the beam illumination time period; indicating the first RO resource set with the granularity of the association period of the SSB burst; or, indicating the first RO resource set with the granularity of the association period of the SSB corresponding to each SSB index in the SSB burst.

[0033] In conjunction with some embodiments of the first aspect, in some embodiments, the first information is used to indicate the first RO resource set within N SSB burst cycles, and the update cycle of the first information is N times the SSB burst cycle; where N is a positive integer.

[0034] In conjunction with some embodiments of the first aspect, in some embodiments, determining the first random access opportunity (RO) resource set includes: determining the RO resources associated with the SSB burst whose interval with the SSB burst is less than a first threshold as the first RO resource; or, determining the RO resources associated with each SSB index in the SSB burst whose interval with the SSB burst is less than the first threshold as the first RO resource; and constructing the first RO resource set based on the first RO resources.

[0035] In conjunction with some embodiments of the first aspect, in some embodiments, determining the first random access timing RO resource set includes: receiving second information, the second information being used to indicate that the beam coverage mode of the SSB burst is a first beam mode, the first beam mode including: the overlap of beam coverage areas between different SSB bursts containing the same SSB index is greater than a second threshold; determining any RO resource associated with the SSB burst as the first RO resource; and constructing the first RO resource set based on the first RO resource.

[0036] In conjunction with some embodiments of the first aspect, in some embodiments, determining the first random access timing (RO) resource set includes: receiving second information, the second information indicating that the beam coverage mode of the SSB burst is a second beam mode, the SSB burst including a first SSB burst and a second SSB burst with adjacent beam illumination time periods, the second beam mode including: the first SSB burst and the second SSB burst satisfying the following condition: the beam coverage area of ​​the second SSB burst surrounds, is adjacent to, or covers the edge portion of the beam coverage area of ​​the first SSB burst; if the first SSB burst satisfies a preset condition, any RO resource associated with the first SSB burst within the beam illumination time period Td1 of the first SSB burst and the beam illumination time period Td2 of the second SSB burst is determined as the first RO resource of the first SSB burst; the preset condition includes: the reference signal received power (RSRP) measurement value of the first SSB burst is greater than a first RSRP threshold and less than a second RSRP threshold; if the first SSB burst does not satisfy the preset condition, the first RO resource of the first SSB burst is determined based on the first information; the first RO resource of the first SSB burst constitutes the first RO resource set of the first SSB burst.

[0037] In the above embodiments, it is explained how the terminal specifically determines the first RO resource set so that the terminal can send a random access request based on the first RO resource in the first RO resource set, which ensures the accurate sending of the random access request, guarantees the access success rate and access efficiency, and ensures communication performance.

[0038] In some embodiments, in conjunction with the first aspect, the method further includes: receiving third information, the third information being used to indicate the timing advance TA of the terminal.

[0039] In conjunction with some embodiments of the first aspect, in some embodiments, the third information includes the ratio between TA and a predetermined duration, the predetermined duration including any of the following: RACH configuration period, SSB burst length, beam illumination time period, association period, the predetermined duration being agreed upon by the protocol, and / or configured by the network device.

[0040] In conjunction with some embodiments of the first aspect, in some embodiments, the update period of the first information, the second information, and the third information is N times the SSB burst period; where N is a positive integer.

[0041] In the above embodiments, the network device can also indicate TA to the terminal so that the terminal can perform uplink synchronization based on TA and ensure communication performance.

[0042] In conjunction with some embodiments of the first aspect, in some embodiments, the first information, the second information, and the third information each include at least one of the following: broadcast message, system message, and group public message.

[0043] In the above embodiments, it is explained what the first information, second information, and third information can be, so that the network device can accurately send the first information, second information, and third information, thereby facilitating the terminal to accurately determine the first RO resource set based on the first information and second information, and to accurately determine the TA based on the third information, thus ensuring communication performance.

[0044] In conjunction with some embodiments of the first aspect, in some embodiments, sending a random access request to a network device based on a first RO resource in the first RO resource set includes: the RSRP measurement value of the SSB burst is greater than a first RSRP threshold, and the random access request is sent to the network device based on the first RO resource.

[0045] In the above embodiments, it is explained that the prerequisite for the terminal to send a random access request is that the RSRP measurement value of the SSB burst is greater than the first RSRP threshold. Optionally, when the RSRP measurement value of the SSB burst is large, it indicates that the communication quality of the cell corresponding to the SSB burst is good. At this time, the terminal can request to access the cell, thereby ensuring the communication quality.

[0046] Secondly, embodiments of this disclosure propose an access method executed by a network device. The method includes: receiving a random access request sent by a terminal based on a first RO resource in a first random access opportunity RO resource set; wherein the first RO resource set includes at least one first RO resource, and the first RO resource is: a RO resource that can achieve communication among the RO resources associated with the SSB burst set of the synchronization signal block (SSB), or the first RO resource can be: a RO resource that can achieve communication among the RO resources associated with each SSB index in the SSB burst.

[0047] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0048] Send first information to the terminal, the first information being used to indicate the first RO resource set.

[0049] In conjunction with some embodiments of the second aspect, in some embodiments, the first information is used for at least one of the following:

[0050] The first RO resource set is indicated with the random access channel (RACH) configuration period as the granularity;

[0051] The first RO resource set is indicated by the SSB burst length;

[0052] The first RO resource set is indicated by the beam illumination time period;

[0053] The first RO resource set is indicated by the association period of the SSB burst, or by the association period of the SSB corresponding to each SSB index in the SSB burst.

[0054] In conjunction with some embodiments of the second aspect, in some embodiments, the first information is used to indicate the first RO resource set within N SSB burst cycles; where N is a positive integer.

[0055] In conjunction with some embodiments of the second aspect, in some embodiments, the first RO resource includes: RO resources among the RO resources associated with the SSB burst whose interval with the SSB burst is less than a first threshold.

[0056] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0057] Send a second message to the terminal, the second message indicating that the beam coverage mode of the SSB burst is a first beam mode, the first beam mode including: the overlap of the beam coverage areas between different SSB bursts containing the same SSB index is greater than a second threshold; the first RO resource includes: any RO resource associated with the SSB burst.

[0058] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0059] Send a second message to the terminal. The second message is used to indicate that the beam coverage mode of the SSB burst is a second beam mode. The SSB burst includes a first SSB burst and a second SSB burst with adjacent beam illumination time periods. The second beam mode includes: the first SSB burst and the second SSB burst satisfy the following condition: the beam coverage area of ​​the second SSB burst surrounds, is adjacent to or covers the edge portion of the beam coverage area of ​​the first SSB burst.

[0060] The aforementioned coverage means that the beam coverage area of ​​the second SSB burst surrounds and covers the edge portion of the beam coverage area of ​​the first SSB burst.

[0061] Wherein, when the second information indicates that the beam coverage mode is the second beam mode, if the first SSB burst meets the preset conditions, the first RO resource of the first SSB burst includes: any RO resource associated with the first SSB burst within the beam illumination time period Td1 of the first SSB burst and the beam illumination time period Td2 of the second SSB burst; if the first SSB burst does not meet the preset conditions, the first RO resource of the first SSB burst is determined based on the first information; wherein, the preset conditions include: the reference signal received power (RSRP) measurement value of the first SSB burst is greater than the first RSRP threshold and less than the second RSRP threshold.

[0062] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0063] A third message is sent to the terminal, the third message being used to indicate the timing advance amount (TA) of the terminal.

[0064] In conjunction with some embodiments of the second aspect, in some embodiments, the third information includes the ratio between TA and a predetermined duration, the predetermined duration including any of the following: RACH configuration period, SSB burst length, beam illumination time period, association period, the predetermined duration being agreed upon by the protocol, and / or configured by the network device.

[0065] In conjunction with some embodiments of the second aspect, in some embodiments, the update period of the first information, the second information, and the third information is N times the SSB burst period; where N is a positive integer.

[0066] In conjunction with some embodiments of the second aspect, in some embodiments, the first information, the second information, and the third information each include at least one of the following: broadcast message, system message, and group public message.

[0067] In conjunction with some embodiments of the second aspect, in some embodiments, the random access request is sent when the RSRP measurement of the SSB burst is greater than a first RSRP threshold.

[0068] Thirdly, embodiments of this disclosure propose a terminal, comprising: a processing module, configured to determine a first random access opportunity RO resource set, the first RO resource set including at least one first RO resource, the first RO resource being: a RO resource that can achieve communication among the RO resources associated with the SSB burst set of the synchronization signal block (SSB), or the first RO resource being: a RO resource that can achieve communication among the RO resources associated with each SSB index in the SSB burst; and a transceiver module, configured to send a random access request to a network device based on the first RO resource in the first RO resource set.

[0069] Fourthly, embodiments of this disclosure propose a network device, including: a transceiver module, configured to receive a random access request sent by a terminal based on a first RO resource in a first random access opportunity RO resource set; wherein, the first RO resource set includes at least one first RO resource, the first RO resource being: a RO resource that can achieve communication among the RO resources associated with the SSB burst set of the synchronization signal block (SSB), or, the first RO resource being: a RO resource that can achieve communication among the RO resources associated with each SSB index in the SSB burst.

[0070] Fifthly, embodiments of this disclosure provide a communication device, which includes: one or more processors; one or more memories for storing instructions; wherein the processors are used to invoke the instructions to cause the communication device to perform the methods described in the first aspect, the optional implementation of the first aspect, the second aspect, and the optional implementation of the second aspect.

[0071] In a sixth aspect, embodiments of this disclosure provide a communication system comprising: a terminal and a network device; wherein the terminal is configured to perform the method described in the first aspect and optional implementations thereof, and the network device is configured to perform the method described in the second aspect and optional implementations thereof.

[0072] In a seventh aspect, embodiments of this disclosure provide a storage medium storing instructions that, when executed on a communication device, cause the communication device to perform the method described in the first aspect, an optional implementation of the first aspect, the second aspect, and an optional implementation of the second aspect.

[0073] Eighthly, embodiments of this disclosure provide a program product including a computer program that, when executed by a processor, implements the methods described in the first aspect, optional implementations of the first aspect, the second aspect, and optional implementations of the second aspect.

[0074] In a ninth 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, an optional implementation of the first aspect, the second aspect, and an optional implementation of the second aspect.

[0075] It is understood that the aforementioned terminals, network devices, communication devices, communication systems, storage media, program products, and computer programs 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.

[0076] This disclosure provides an access method, communication device, communication system, and storage medium. In some embodiments, the terms resource selection method, information processing method, and communication method can be used interchangeably.

[0077] 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. In all embodiments of this disclosure, unless otherwise specified or logically conflicting, the terminology and / or descriptions between the embodiments are consistent and can be mutually referenced. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0078] 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.

[0079] 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.

[0080] In the embodiments disclosed herein, "multiple" refers to two or more.

[0081] In some embodiments, the terms “at least one of A or B, at least one of A and B”, “one or more”, “a plurality of”, “multiple”, etc., may be used interchangeably.

[0082] In some embodiments, the notation "at least one of A and B", "A and / or B", "A in one case, B in another", "in response to one case A, in response to another case B", etc., may include the following technical solutions depending on the situation: in some embodiments, A (execute A regardless of whether there is a branch B); in some embodiments, B (execute B regardless of whether there is a branch A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, both A and B are executed. The same applies when there are more branches such as A, B, C, etc.

[0083] In some embodiments, the notation "A or B" may include the following technical solutions, depending on the situation: in some embodiments, A (execute A regardless of whether a branch B exists); in some embodiments, B (execute B regardless of whether a branch A exists); in some embodiments, execution is selected from A and B (A and B are selectively executed). The same applies when there are more branches such as A, B, and C.

[0084] 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.

[0085] In some embodiments, “including A,” “containing A,” “for indicating A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0086] In some embodiments, terms such as "time / frequency" and "time-frequency domain" refer to the time domain and / or frequency domain.

[0087] In some embodiments, terms such as “in response to…”, “in response to determining…”, “in the case of…”, “when…”, “when…”, “if…”, etc. can be used interchangeably. These descriptions all refer to the device making a corresponding action under certain objective circumstances. They do not necessarily limit the time, nor do they require the device to make a judgment action when implementing it, nor do they mean that there must be other limitations.

[0088] 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”.

[0089] In some embodiments, devices, etc., may be interpreted as physical or virtual, and their names are not limited to those described in the embodiments. Terms such as “device,” “equipment,” “circuit,” “network element,” “network function,” “network device,” “function,” “node,” “unit,” “section,” “system,” “network,” “chip,” “chip system,” “entity,” and “subject” are interchangeable.

[0090] In some embodiments, "network" can be interpreted as devices included in a network (e.g., access network devices, core network devices, etc.).

[0091] 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," "serving cell," "carrier," "component carrier," and "bandwidth part (BWP)" can be used interchangeably.

[0092] 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", and "client" can be used interchangeably.

[0093] 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 where communication between access network devices, core network devices, or network devices and terminals is replaced by communication between multiple terminals (e.g., 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, and uplink link, downlink, etc., can be replaced with sidelink link.

[0094] 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.

[0095] In some embodiments, the acquisition of data, information, etc., may comply with the laws and regulations of the country where the location is situated.

[0096] In some embodiments, data, information, etc., may be obtained with the user's consent.

[0097] 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.

[0098] Figure 1A is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure. As shown in Figure 1A, the communication system 100 may include at least one of a terminal and a network device; optionally, the network device may include an access network device and / or a core network device.

[0099] In some embodiments, the terminal includes, but is not limited to, at least one of the following: mobile phone, wearable device, Internet of Things device, car with communication function, smart car, tablet, computer with wireless transceiver function, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal device in industrial control, wireless terminal device in self-driving, wireless terminal device in remote medical surgery, wireless terminal device in smart grid, wireless terminal device in transportation safety, wireless terminal device in smart city, and wireless terminal device in smart home.

[0100] In some embodiments, the access network device is, for example, a node or device that connects a terminal to a wireless network. The access network device may include at least one of the following in a 5G communication system: evolved Node B (eNB), next-generation evolved Node B (ng-eNB), next-generation Node B (gNB), Node B (NB), Home Node B (HNB), Home evolved Node B (HeNB), radio backhaul device, radio network controller (RNC), base station controller (BSC), base transceiver station (BTS), base band unit (BBU), mobile switching center, base station in a 6G communication system, open RAN, cloud RAN, base station in other communication systems, and access node in a Wi-Fi system, but is not limited thereto.

[0101] In some embodiments, the technical solutions of this disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within access network devices involved in the embodiments of this disclosure can be transformed into internal interfaces of Open RAN. The processes and information interactions between these internal interfaces can be implemented by software or programs.

[0102] In some embodiments, the access network device may be composed of a central unit (CU) and a distributed unit (DU). The CU may also be called a control unit. The CU-DU structure can separate the protocol layer of the access network device. Some protocol layer functions are centrally controlled by the CU, while the remaining part or all protocol layer functions are distributed in the DU and centrally controlled by the CU. However, this is not the only possibility.

[0103] In some embodiments, a core network device may be a single device comprising one or more network elements, or it may be multiple devices or a group of devices, each comprising all or part of the aforementioned one or more network elements. Network elements may be virtual or physical. The core network may include, for example, at least one of the following: Evolved Packet Core (EPC), 5G Core Network (5GCN), and Next Generation Core (NGC).

[0104] 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.

[0105] The following embodiments of this disclosure can be applied to the communication system 100 shown in FIG1A, or to some of the main bodies, but are not limited thereto. The main bodies shown in FIG1A are illustrative. The communication system may include all or some of the main bodies in FIG1A, or it may include other main bodies outside of FIG1A. The number and form of each main body are arbitrary. The connection relationship between the main bodies is illustrative. The main bodies may not be connected or may be connected. The connection can be in any way, it can be a direct connection or an indirect connection, it can be a wired connection or a wireless connection.

[0106] The embodiments disclosed herein can be applied to 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 New Radio (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 resource selection 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).

[0107] Optionally, the network device can send (e.g., periodically) multiple different SSB bursts to the terminal. In some embodiments, different SSB bursts sent to the same terminal have the same SSB index but different beams. For example, the network device can send SSB burst 1 and SSB burst 2 to the terminal, with different transmission times. SSB burst 1 may include two SSBs with SSB indices SSB#1 and SSB#2, and the transmission beam of SSB burst 1 can be beam #1 and beam #2. SSB burst 2 may include two SSBs with SSB indices SSB#1 and SSB#2, and the transmission beam of SSB burst 2 can be beam #3 and beam #4.

[0108] Optionally, in a Non-Terrestrial Network (NTN) system, different beams correspond to different beam illumination periods. A beam illumination period can be understood, for example, as the time during which a satellite signal illuminates or covers the beam's coverage area or beam position (BP). When a beam is within its illumination period, network communication (e.g., uplink and / or downlink transmission) can be performed based on that beam; when a beam is not within its illumination period, network communication is not possible based on that beam.

[0109] In some embodiments, different SSB bursts correspond to an association period, which includes at least one random access channel occasion (RO) resource associated with each SSB in the SSB burst. When a terminal receives an SSB burst sent by a network device, it can send a random access request on the RO resource associated with that SSB burst to request network access. However, in some embodiments, the time domain location of some RO resources associated with the SSB burst is not within the beam illumination period of that SSB burst beam. In this case, the terminal may not be able to send a random access request based on these RO resources.

[0110] For example, Figure 1B is a schematic diagram illustrating the association relationship between SSB bursts and RO resources according to an embodiment of this disclosure. As shown in Figure 1B, the beam illumination time period of the beam corresponding to SSB burst 1 is 20 milliseconds (ms), and the beam illumination time period of the beam corresponding to SSB burst 2 is 20 ms. The beam illumination time period of SSB burst 2 is immediately after the beam illumination time period of SSB burst 1, and the SSB burst period is 160 ms. SSB burst 1 transmits within the first 5 ms of its beam illumination time period, and the association period of SSB burst 1 is 40 ms. Within the association period, RO1 in R1, RO2 in R2, and RO3 in R3 are jointly associated with SSB burst 1. However, RO3 is not located within the beam illumination time period of SSB burst 1, but within the beam illumination time period of SSB burst 2. Optionally, if the terminal chooses to send a random access request on RO3, since it is the time period when the beam of SSB burst 2 is lit, that is, the beam corresponding to SSB burst 2 can carry out communication transmission, if the beam coverage area of ​​SSB burst 1 is adjacent to the beam coverage area of ​​SSB burst 2, the terminal can only obtain the spatial diversity gain of SSB burst 2 when it is located at the edge of the beam coverage area of ​​SSB burst 1, and can only successfully send a random access request to the network device based on RO3. When the terminal is not located at the edge of the beam coverage area of ​​SSB burst 1, the terminal cannot obtain the spatial diversity gain of SSB burst 2, and therefore cannot send a random access request to the network device based on RO3.

[0111] Therefore, it can be concluded that when the RO resource associated with an SSB burst is within the beam illumination period of the SSB burst, the RO resource can achieve communication; however, when the RO resource associated with an SSB burst is not within the beam illumination period of the SSB burst, the RO resource may not be able to achieve communication. That is, for SSB burst1, RO1 and RO2 associated with SSB burst1 can communicate, while RO3 associated with SSB burst1 cannot communicate. For SSB burst2, the RO in R4 associated with SSB burst2 can communicate.

[0112] Optionally, in some embodiments, if the terminal does not know which RO resources associated with the SSB burst can communicate and which RO resources cannot communicate, the terminal may be unable to successfully send a random access request, resulting in access failure and affecting communication performance.

[0113] Figure 2A is an interactive schematic diagram of an access method according to an embodiment of the present disclosure. As shown in Figure 2A, this embodiment of the disclosure relates to an access method for a communication system 100; the method includes:

[0114] Step 2101: The network device sends the first information to the terminal.

[0115] Optionally, the first information can be used to indicate a first RO resource set. In some embodiments, the first RO resource set may include at least one first RO resource, which can be: RO resources among the RO resources associated with the SSB burst that are capable of communication; or, the first RO resource can be: RO resources among the RO resources associated with each SSB index in the SSB burst that are capable of communication. Optionally, the first information can be used to indicate a first RO resource set corresponding to at least one SSB burst.

[0116] Optionally, the aforementioned "RO resource capable of communication" may refer to, for example, an RO resource capable of successfully sending a random access request. For instance, regarding the SSB burst 1 shown in Figure 1B, if the terminal is at the edge of the SSB burst 1 beam coverage area, the first information may indicate at least one of RO1, RO2, and RO3 as the first RO resource; if the terminal is not at the edge of the SSB burst 1 beam coverage area, the first information may indicate at least one of RO1 and RO2 as the first RO resource.

[0117] In some embodiments, the first information may indicate a first RO resource set at the granularity of a Random Access Channel (RACH) configuration period. For example, the first information may include a bitmap, where different bits in the bitmap correspond to different time periods, and the time periods have the same duration, which can be a RACH configuration period; or, different bits in the bitmap may correspond to different RACH configuration periods. Optionally, the bit value carried by a bit may be used to indicate whether the RO resource in the corresponding time period is a first RO resource. For example, when a bit carries a first value (e.g., 1), it indicates that the RO resource in the corresponding time period is a first RO resource; when a bit carries a second value (e.g., 0), it indicates that the RO resource in the corresponding time period is not a first RO resource. For example, when a bit carries a first value (e.g., 1), it indicates that the RO resource set in the corresponding time period is a first RO resource set; when a bit carries a second value (e.g., 0), it indicates that the RO resource set in the corresponding time period is not a first RO resource set. For example, when a bit carries a first value (e.g., 1), it indicates that the RO resources in the corresponding time period constitute the first RO resource set; when a bit carries a second value (e.g., 0), it indicates that the RO resources in the corresponding time period do not constitute the first RO resource set. In some embodiments, when all RO resources in the time period corresponding to a bit are first RO resources, the bit can carry the first value; when at least some RO resources in the time period corresponding to a bit are not first RO resources, the bit can carry the second value.

[0118] In some embodiments, the first information may indicate a first RO resource set at the granularity of SSB burst length. For example, the first information may include a bitmap, where different bits in the bitmap correspond to different time periods, and the time periods have the same duration, which can be an SSB burst; or, different bits in the bitmap correspond to different SSB bursts. Optionally, the bit value carried by the bit may be used to indicate whether the RO resource in the corresponding time period is a first RO resource. For example, when the bit carries a first value (e.g., 1), it indicates that the RO resource in the corresponding time period is a first RO resource; when the bit carries a second value (e.g., 0), it indicates that the RO resource in the corresponding time period is not a first RO resource. For example, when the bit carries a first value (e.g., 1), it indicates that the RO resource set in the corresponding time period is a first RO resource set; when the bit carries a second value (e.g., 0), it indicates that the RO resource set in the corresponding time period is not a first RO resource set. For example, when a bit carries a first value (e.g., 1), it indicates that the RO resources in the corresponding time period constitute the first RO resource set; when a bit carries a second value (e.g., 0), it indicates that the RO resources in the corresponding time period do not constitute the first RO resource set. In some embodiments, when all RO resources in the time period corresponding to a bit are first RO resources, the bit can carry the first value; when at least some RO resources in the time period corresponding to a bit are not first RO resources, the bit can carry the second value.

[0119] In some embodiments, the first information may indicate a first RO resource set at the granularity of beam illumination time periods. For example, the first information may include a bit map, where different bits in the bit map correspond to different time periods, and the time periods have the same duration, which may be the beam illumination time, or different bits in the bit map may correspond to different beam illumination times. Optionally, the bit value carried by the bit may be used to indicate whether the RO resource in the corresponding time period is a first RO resource. For example, when the bit carries a first value (e.g., 1), it indicates that the RO resource in the corresponding time period is a first RO resource; when the bit carries a second value (e.g., 0), it indicates that the RO resource in the corresponding time period is not a first RO resource. For example, when the bit carries a first value (e.g., 1), it indicates that the RO resource set in the corresponding time period is a first RO resource set; when the bit carries a second value (e.g., 0), it indicates that the RO resource set in the corresponding time period is not a first RO resource set. For example, when a bit carries a first value (e.g., 1), it indicates that the RO resources in the corresponding time period constitute the first RO resource set; when a bit carries a second value (e.g., 0), it indicates that the RO resources in the corresponding time period do not constitute the first RO resource set. In some embodiments, when all RO resources in the time period corresponding to a bit are first RO resources, the bit can carry the first value; when at least some RO resources in the time period corresponding to a bit are not first RO resources, the bit can carry the second value.

[0120] In some embodiments, the first information may indicate the first RO resource set at the granularity of the association period of the SSB burst, or at the granularity of the association period of the SSB corresponding to each SSB index in the SSB burst. For example, the first information may include a bit map, where different bits in the bit map correspond to different time periods, and the time periods have the same length, which can be the association period; or, different bits in the bit map correspond to different association periods. Optionally, the bit value carried by the bit may be used to indicate whether the RO resource in the time period corresponding to the bit is the first RO resource. For example, when the bit carries a first value (e.g., 1), it indicates that the RO resource in the corresponding time period is the first RO resource; when the bit carries a second value (e.g., 0), it indicates that the RO resource in the corresponding time period is not the first RO resource. For example, when the bit carries a first value (e.g., 1), it indicates that the RO resource set in the corresponding time period is the first RO resource set; when the bit carries a second value (e.g., 0), it indicates that the RO resource set in the corresponding time period is not the first RO resource set. For example, when a bit carries a first value (e.g., 1), it indicates that the RO resources in the corresponding time period constitute the first RO resource set; when a bit carries a second value (e.g., 0), it indicates that the RO resources in the corresponding time period do not constitute the first RO resource set. In some embodiments, when all RO resources in the time period corresponding to a bit are first RO resources, the bit can carry the first value; when at least some RO resources in the time period corresponding to a bit are not first RO resources, the bit can carry the second value.

[0121] Optionally, the unit of the aforementioned time unit may include at least one of the following: slot, frame, subframe, symbol, transmission time interval (TTI).

[0122] Optionally, in some embodiments, the first information can be used to indicate the first RO resource set within N SSB burst cycles; N is a positive integer. For example, assuming N is 2, the first information can be used to indicate the first RO resource set of different SSB bursts within 2 SSB burst cycles.

[0123] In some embodiments, the update period of the first information can be N times the SSB burst period. Optionally, the "update period of the first information" can be understood as, for example, the time interval between two adjacent transmissions of the first information. In some embodiments, when N is 2, assuming the SSB burst period is 160ms, the "update period of the first information" can be 320ms. The network device can send the first information in the first SSB burst period, and then send the first information in the third SSB burst period. Optionally, the first information transmitted in two adjacent transmissions can be the same or different. For example, the first RO resource set indicated by the first information transmitted in the first SSB burst period can be the same or different from the first RO resource set indicated by the first information transmitted in the third SSB burst period.

[0124] In some embodiments, the first information may include at least one of the following: a broadcast message, a system message, or a group common message. Optionally, the group common message may be understood as a message sent to a terminal group. Optionally, the terminal group may include multiple terminals. Optionally, the group common message may include, for example, a group control message and / or a group multicast message.

[0125] Step 2102: The network device sends third information to the terminal.

[0126] Optionally, the third information can be used to indicate the timing advance (TA) of the terminal. Optionally, the TA can be used to achieve uplink synchronization. In some embodiments, the network device indicates the TA to the terminal through the third information because: when the terminal determines the association relationship between SSB and RO resources, the starting resource position of the association period used (e.g., the starting frame number Frame 0) is the frame number corresponding to the downlink timing. The terminal usually needs to compensate the starting resource position of the association period with the corresponding TA to ensure that uplink synchronization is achieved when sending random access requests based on the RO resources in the association period, and to avoid inter-cell interference.

[0127] Optionally, when the terminal determines the association between SSB and RO resources, it can be based on the protocol agreement and / or on the configuration of the network device.

[0128] Optionally, in some embodiments, the method for indicating a TA with third information may be that the third information includes the TA. In other embodiments, the method for indicating a TA with third information may be that the third information includes an indication value, with different indication values ​​used to indicate different TAs. In still other embodiments, the method for indicating a TA with third information may be that the third information includes the ratio between the TA and a predetermined duration, optionally including any of the following: RACH configuration period, SSB burst length, beam illumination time period, or association period. The predetermined duration may be agreed upon by a protocol and / or configured by the network device.

[0129] Optionally, the unit of the aforementioned predetermined unit may include at least one of the following: slot, frame, subframe, symbol, transmission time interval (TTI).

[0130] In some embodiments, the update period for the third information can be N times the SSB burst period, where N is a positive integer. Optionally, the "update period for the third information" can be understood as, for example, the time interval between two adjacent transmissions of the third information. In some embodiments, when N is 2, the network device can transmit the third information in the first SSB burst period and then in the third SSB burst period. Optionally, the third information transmitted in two adjacent periods can be the same or different. For example, the TA indicated by the third information transmitted in the first SSB burst period can be the same or different from the TA indicated by the third information transmitted in the third SSB burst period.

[0131] Optionally, the third information may include at least one of the following: broadcast message, system message, or group public message.

[0132] Step 2103: The network device sends an SSB burst to the terminal.

[0133] Optionally, the network device may periodically send SSB bursts to the terminal. For a detailed description of SSB bursts, please refer to the description preceding the embodiment shown in Figure 2A.

[0134] In some embodiments, steps 2101, 2102, and 2103 may be interchanged or executed simultaneously. For example, steps 2102, 2101, and 2103 may be executed sequentially, or steps 2103, 2101, and 2102 may be executed sequentially, or steps 2103, 2101, and 2102 may be executed simultaneously. This disclosure does not impose specific limitations on this.

[0135] Step 2104: The terminal determines the first RO resource set of the SSB burst based on the first information.

[0136] Optionally, the terminal can directly determine the first RO resource set of the SSB burst based on the indication content of the first information.

[0137] For a detailed introduction to the first information and the first RO resource set, please refer to the description in step 2101 above.

[0138] Step 2105: The terminal sends a random access request to the network device based on the first RO resource in the first RO resource set.

[0139] Optionally, after receiving an SSB burst, the terminal can determine the measured value of the Reference Signal Received Power (RSRP) of the SSB burst. When the measured value of the RSRP of the SSB burst is greater than a first RSRP threshold, the terminal can send a random access request to the network device based on the first RO resource of the SSB burst. For example, the terminal can send a random access request based on any of the first RO resources of the SSB burst, or the terminal can send a random access request based on the first RO resource closest to the SSB burst.

[0140] Therefore, the prerequisite for a terminal to send a random access request is that the RSRP measurement value of the SSB burst is greater than the first RSRP threshold. Optionally, when the RSRP measurement value of the SSB burst is large, it indicates that the communication quality of the cell corresponding to the SSB burst is good. At this time, the terminal can request access to the cell to ensure communication quality.

[0141] In summary, in the above embodiments, the terminal can determine which RO resources among the RO resources associated with the SSB burst are capable of communication, and send a random access request to the network device based on these RO resources. This avoids the situation where "the terminal cannot know which RO resources among the RO resources associated with the SSB burst are capable of communication and which are not, and therefore selects RO resources that cannot communicate to send the random access request, resulting in the random access request failing to be sent." Thus, this disclosure can ensure the accurate sending of the random access request, guarantee the access success rate and access efficiency, and ensure communication performance.

[0142] The access method involved in the embodiments of this disclosure may include at least one of steps 2101 to 2105. For example, step 2101 may be implemented as an independent embodiment, step 2102 may be implemented as an independent embodiment, step 2103 may be implemented as an independent embodiment, and steps 2101+2102+2103 may be implemented as an independent embodiment, but are not limited thereto.

[0143] In some embodiments, steps 2101, 2102, and 2103 may be interchanged or executed simultaneously. For example, steps 2102, 2101, and 2103 may be executed sequentially, or steps 2103, 2101, and 2102 may be executed sequentially, or steps 2103, 2101, and 2102 may be executed simultaneously. This disclosure does not impose specific limitations on this.

[0144] In some embodiments, the steps and their optional implementations in other embodiments described before or after this embodiment, as well as other related parts in the specification, can be referred to, and will not be repeated here.

[0145] Figure 2B is an interactive schematic diagram of an access method according to an embodiment of the present disclosure. As shown in Figure 2B, this embodiment of the disclosure relates to an access method for a communication system 100; the method includes:

[0146] Step 2201: The network device sends third information to the terminal.

[0147] Step 2202: The network device sends an SSB burst to the terminal.

[0148] For a detailed description of steps 2201 and 2202, please refer to the embodiment described in Figure 2A above.

[0149] Step 2203: The terminal determines the first RO resource set of the SSB burst.

[0150] Optionally, the terminal can identify the RO resources associated with the SSB burst that have an interval less than a first threshold as the first RO resource, and construct a first RO resource set based on the first RO resources. For a detailed description of "first RO resource" and "first RO resource set", please refer to the embodiment described in Figure 2A.

[0151] Optionally, in some embodiments, the RO resources associated with the SSB burst are arranged sequentially in the time domain. The closer an RO resource is to the SSB burst, the greater its probability of being within the beam illumination period of the SSB burst. For example, the RO resource closest to the SSB burst is generally within the beam illumination period of the SSB burst, and the farther an RO resource is from the SSB burst, the greater its probability of being outside the beam illumination period of the SSB burst. For example, referring to Figure 1B above, RO1 in R1, RO2 in R2, and RO3 in R3 associated with SSB burst 1 are arranged sequentially in the time domain. RO1 and RO2, which are closer to SSB burst 1, are within the beam illumination period of SSB burst 1, while RO3, which is farther from SSB burst 1, is not within the beam illumination period corresponding to SSB burst 1. Therefore, in some embodiments, the first threshold can be set as the interval between the RO resource associated with the SSB burst and the SSB burst, specifically the RO resource that is furthest from the SSB burst and whose temporal location is within the beam illumination time period of the SSB burst. For example, the first threshold can be set as the interval between R2 and SSB burst1 in Figure 1B, such as the interval between the start or end position of R2 and the start or end position of the SSB burst. Thus, the determined RO resources with an interval less than the first threshold from the SSB burst are all RO resources within the beam illumination time period of the SSB burst, and these RO resources can successfully send random access requests to the network device.

[0152] For example, in some embodiments, the terminal may not refer to the first threshold and directly determine the RO resource closest to the SSB burst as the first RO resource. For example, the terminal may determine RO1 in R1 shown in Figure 1B as the first RO resource.

[0153] Step 2204: The terminal sends a random access request to the network device based on the first RO resource in the first RO resource set.

[0154] For a detailed description of step 2204, please refer to the embodiment described in Figure 2A.

[0155] In summary, in the above embodiments, the terminal can determine which RO resources among the RO resources associated with the SSB burst are capable of communication, and send a random access request to the network device based on these RO resources. This avoids the situation where "the terminal cannot know which RO resources among the RO resources associated with the SSB burst are capable of communication and which are not, and therefore selects RO resources that cannot communicate to send the random access request, resulting in the random access request failing to be sent." Thus, this disclosure can ensure the accurate sending of the random access request, guarantee the access success rate and access efficiency, and ensure communication performance.

[0156] The access method involved in the embodiments of this disclosure may include at least one of steps 2201 to 2204. For example, step 2201 may be implemented as a standalone embodiment, step 2202 may be implemented as a standalone embodiment, step 2203 may be implemented as a standalone embodiment, and steps 2201+2202+2203 may be implemented as standalone embodiments, but are not limited thereto.

[0157] In some embodiments, the order of steps 2201 and 2202 can be interchanged or they can be executed simultaneously. For example, steps 2202 and 2201 can be executed sequentially or simultaneously. This disclosure does not specifically limit this.

[0158] In some embodiments, the steps and their optional implementations in other embodiments described before or after this embodiment, as well as other related parts in the specification, can be referred to, and will not be repeated here.

[0159] Figure 2C is an interactive schematic diagram of the access method according to this disclosure. As shown in Figure 2C, the embodiments of this disclosure relate to an access method for a communication system 100; the method includes:

[0160] Step 2301: The network device sends the second information to the terminal.

[0161] Optionally, in some embodiments, the second information may be used to indicate the beam coverage pattern of the SSB burst.

[0162] In some embodiments, the beam coverage mode of the SSB burst may include at least one of a first beam mode and a second beam mode.

[0163] Optionally, the first beam pattern may include: the overlap of beam coverage areas between different SSB bursts containing the same SSB index is greater than a second threshold. Optionally, in the first beam pattern, different SSB bursts containing the same SSB index may correspond to different beams, and the overlap of beam coverage areas between these different beams may be greater than the second threshold. For example, Figure 2D is a schematic diagram of the first beam pattern according to this disclosure. As shown in Figure 2D, it is assumed that the SSB burst of the terminal includes SSB burst 1 and SSB burst 2. The beams of SSB burst 1 and SSB burst 2 are different. The beam of SSB burst 1 is a narrow beam, and the beam of SSB burst 2 is a wide beam. The beam coverage area of ​​SSB burst 1 and the beam coverage area of ​​SSB burst 2 are both region 1. In Figure 2D, a time-division method is used to completely cover region 1. In fact, the beam coverage area of ​​SSB burst 1 during the beam illumination period of SSB burst 1 is the same region as the beam coverage area of ​​SSB burst 2 during the beam illumination period of SSB burst 2, which is region 1.

[0164] Optionally, the second beam pattern may include: a first SSB burst and a second SSB burst with adjacent beam illumination time periods satisfying at least one of the following: the time domain position of the first SSB burst is earlier than the time domain position of the second SSB burst; the beam coverage area of ​​the second SSB burst surrounds, is adjacent to, or covers the edge portion of the beam coverage area of ​​the first SSB burst. Optionally, the first SSB burst and the second SSB burst may be located in the same correlation period or adjacent correlation periods.

[0165] Alternatively, the aforementioned "envelopment" can be understood, for example, as follows: the beam coverage area of ​​the second SSB burst surrounds the edge portion of the beam coverage area of ​​the first SSB burst, while the beam coverage area of ​​the second SSB burst covers the edge portion of the beam coverage area of ​​the first SSB burst.

[0166] Optionally, the above-mentioned "surrounding or adjacent" can be understood as follows: the beam coverage area of ​​the second SSB burst surrounds the edge portion of the beam coverage area of ​​the first SSB burst, and at the same time, the beam coverage area of ​​the second SSB burst is adjacent to the edge portion of the beam coverage area of ​​the first SSB burst, and the beam coverage area of ​​the second SSB burst does not cover the edge portion of the beam coverage area of ​​the first SSB burst.

[0167] For example, Figure 2E is a schematic diagram of the second beam pattern according to this disclosure. As shown in Figure 2E, it is assumed that the SSB burst of the terminal includes SSB burst 1 and SSB burst 2. The beams of SSB burst 1 and SSB burst 2 are different. The beam of SSB burst 1 is a narrow beam and the beam of SSB burst 2 is a wide beam. The beam coverage areas of SSB burst 1 and SSB burst 2 are region 1 and region 2, respectively. The black area in Figure 2E is the beam coverage area of ​​SSB burst 1 (i.e., region 1), and the light gray area is the beam coverage area of ​​SSB burst 2 (i.e., region 2). During the time period when the beam of SSB burst 1 is lit, the beam coverage area of ​​SSB burst 1 (region 1) and the beam coverage area of ​​SSB burst 2 (region 2) during the time period when the beam of SSB burst 2 is lit satisfy the following condition: region 2 covers region 1, and the overlap between region 2 and region 1 is greater than a certain threshold.

[0168] Optionally, the second information may include at least one of the following: broadcast message, system message, or group public message.

[0169] In some embodiments, the update period of the second information can be N times the SSB burst period; where N is a positive integer. Optionally, the "update period of the second information" can be understood, for example, as the time interval between two adjacent transmissions of the second information. In some embodiments, when N is 2, the network device can transmit the second information in the first SSB burst period and then in the third SSB burst period. Optionally, the second information transmitted in two adjacent periods can be the same or different. For example, the beam coverage mode indicated by the second information transmitted in the first SSB burst period may be the same or different from the beam coverage mode indicated by the second information transmitted in the third SSB burst period.

[0170] Step 2302: The network device sends third information to the terminal.

[0171] Step 2303: The network device sends an SSB burst to the terminal.

[0172] For a detailed description of steps 2302 and 2303, please refer to the embodiment described in Figure 2A above.

[0173] Step 2304: The terminal determines the first RO resource set of the SSB burst based on the second information.

[0174] Optionally, in some embodiments, when the second information indicates that the beam coverage mode of the SSB burst is the first beam mode, any RO resource associated with the SSB burst can be determined as the first RO resource of the SSB burst, and the first RO resource set of the SSB burst can be constructed based on the first RO resource of the SSB burst. For a detailed description of "first RO resource, first RO resource set", please refer to the embodiment description in FIG2A.

[0175] Specifically, in some embodiments, when the beam coverage mode of an SSB burst is the first beam mode, it indicates that the beam coverage areas of different SSB bursts of the terminal have a high degree of overlap. For example, the beam coverage areas of different SSB bursts of the terminal can be the same area, such as area 1 in Figure 2D. At this time, when the beam of any SSB burst (e.g., SSB burst 1) is lit, the beam coverage area of ​​SSB burst 1 will be covered by satellite signals, and the beam of SSB burst 1 can communicate normally. At the same time, the beam coverage areas of other SSB bursts besides SSB burst 1 have a high degree of overlap with the beam coverage area of ​​SSB burst 1. Then most or even all of the beam coverage areas of other SSB bursts will also be covered by satellite signals, and the beams of other SSB bursts can also communicate normally. Therefore, when the beam coverage mode of the SSB burst is the first beam mode, there will always be an SSB burst in the beam lighting period at any time. At this time, the RO resources of any SSB burst of the terminal can communicate normally. Thus, any RO resource associated with the SSB burst can be determined as the first RO resource of the SSB burst.

[0176] Optionally, in some embodiments, when the second information indicates that the beam coverage mode of the SSB burst is the second beam mode, the terminal can first determine whether the first SSB burst under the second beam mode meets a preset condition. If the preset condition is met, the terminal determines any RO resource associated with the first SSB burst within the beam illumination time period Td1 of the first SSB burst and the beam illumination time period Td2 of the second SSB burst as the first RO resource of the first SSB burst, and constructs a first RO resource set based on the first RO resource. If the preset condition is not met, the terminal can determine the first RO resource of the first SSB burst based on the first information sent by the network device, and construct a first RO resource set based on the first RO resource. For a detailed description of the first information, please refer to the embodiment described in Figure 2A above. Optionally, the preset condition may include, for example, that the measured value of the first SSB burst is greater than a first RSRP threshold and less than a second RSRP threshold. Optionally, the second RSRP threshold may be agreed upon by the protocol and / or configured by the network device.

[0177] The following is a detailed explanation of the determination principle for the second beam mode:

[0178] Optionally, as can be seen from step 2301 above, in the second beam mode, the beam illumination time period of the first SSB burst is adjacent to the beam illumination time period of the second SSB burst, the time domain position of the first SSB burst is before the time domain position of the second SSB burst, and the beam coverage area of ​​the second SSB burst surrounds, is adjacent to, or covers the edge portion of the beam coverage area of ​​the first SSB burst. In this case, the relationship between the first SSB burst and the second SSB burst can be considered as the relationship between SSB burst 1 and SSB burst 2 in Figure 1B above, where the first SSB burst can be regarded as SSB burst 1 in Figure 1B, and the second SSB burst can be regarded as SSB burst 2 in Figure 1B. When the beam coverage area of ​​SSB burst 2 surrounds, is adjacent to, or covers the edge of the beam coverage area of ​​SSB burst 1, if a preset condition is met, it indicates that the terminal is located at the edge of the SSB burst 1 beam coverage area. The terminal can obtain the beam spatial diversity gain of SSB burst 2, and thus the terminal can successfully communicate based on the ROs within the beam illumination time period Td2 of SSB burst 2. That is, the terminal can successfully communicate based on RO3 in R3 shown in Figure 1B. Furthermore, when the terminal is located at the edge of the SSB burst 1 beam coverage area, it can already successfully communicate based on the ROs within the beam illumination time period Td1 of SSB burst 1. That is, the terminal can successfully communicate based on RO1 in R1 and RO2 in R2 shown in Figure 1B. Therefore, for a terminal located at the edge of the SSB burst 1 beam coverage area, communication can be achieved with any RO within the time periods Td1 and Td2. In this case, any RO resource associated with SSB burst 1 within Td1 and Td2 can be determined as the first RO resource of SSB burst 1.

[0179] It should be noted that when the beam coverage mode is the second beam mode, the following situation may occur for SSB burst 1 and SSB burst 2 shown in Figure 1B: SSB burst 2 is followed by SSB burst 3, the beam illumination time period Td3 of SSB burst 3 is after the beam illumination time period Td2 of SSB burst 2, and the beam coverage area of ​​SSB burst 3 surrounds, is adjacent to, or covers the beam coverage area of ​​SSB burst 2. Therefore, for SSB burst 2, the beam coverage area of ​​SSB burst 2 surrounds, is adjacent to, or covers the edge of SSB burst 1. Simultaneously, the beam coverage area of ​​SSB burst 3 surrounds, is adjacent to, or covers the beam coverage area of ​​SSB burst 2. That is, there is an edge boundary between SSB burst 2 and SSB burst 1, and there is also an edge boundary between SSB burst 2 and SSB burst 3. In this case, if the terminal is determined to be located within the SSB burst based on preset conditions... When determining the edge location of the 2-beam coverage area, it is necessary to further confirm whether the terminal's location is close to the edge of the SSB burst 1 beam coverage area or the edge of the SSB burst 3 beam coverage area. If the terminal's location is close to the edge of the SSB burst 1 beam coverage area, any RO resource corresponding to SSB burst 2 within Td2 can be determined as the first RO resource of SSB burst 2. If the terminal's location is close to the edge of the SSB burst 3 beam coverage area, any RO resource corresponding to SSB burst 2 within Td2 and Td3 can be determined as the first RO resource of SSB burst 2.

[0180] Step 2305: The terminal sends a random access request to the network device based on the first RO resource in the first RO resource set.

[0181] For a detailed description of step 2305, please refer to the embodiment described in Figure 2A.

[0182] In summary, in the above embodiments, the terminal can determine which RO resources among the RO resources associated with the SSB burst are capable of communication, and send a random access request to the network device based on these RO resources. This avoids the situation where "the terminal cannot know which RO resources among the RO resources associated with the SSB burst are capable of communication and which are not, and therefore selects RO resources that cannot communicate to send the random access request, resulting in the random access request failing to be sent." Thus, this disclosure can ensure the accurate sending of the random access request, guarantee the access success rate and access efficiency, and ensure communication performance.

[0183] The access method involved in the embodiments of this disclosure may include at least one of steps 2301 to 2305. For example, step 2301 may be implemented as a standalone embodiment, step 2302 may be implemented as a standalone embodiment, step 2303 may be implemented as a standalone embodiment, and steps 2301+2302+2303 may be implemented as standalone embodiments, but are not limited thereto.

[0184] In some embodiments, steps 2301, 2302, and 2303 may be interchanged or executed simultaneously. For example, steps 2302, 2301, and 2303 may be executed sequentially, or steps 2303, 2301, and 2302 may be executed simultaneously. This disclosure does not specifically limit this.

[0185] In some embodiments, the steps and their optional implementations in other embodiments described before or after this embodiment, as well as other related parts in the specification, can be referred to, and will not be repeated here.

[0186] Figure 3A is a flowchart illustrating an access method according to an embodiment of the present disclosure. As shown in Figure 3A, this disclosure relates to an access method for a terminal, the method comprising:

[0187] Step 3101: Determine the first RO resource set.

[0188] Step 3102: Send a random access request to the network device based on the first RO resource in the first RO resource set.

[0189] Optionally, the first RO resource set includes at least one first RO resource, which is: a RO resource that can achieve communication among the RO resources associated with the SSB burst set of the synchronization signal block (SSB) or a first RO resource that can achieve communication among the RO resources associated with each SSB index in the SSB burst.

[0190] Optionally, determining the first random access opportunity (RO) resource set includes:

[0191] Receive first information sent by the network device, the first information being used to indicate the first RO resource set;

[0192] The first RO resource set is determined based on the first information.

[0193] Optionally, the first information is used for at least one of the following:

[0194] The first RO resource set is indicated with the random access channel (RACH) configuration period as the granularity;

[0195] The first RO resource set is indicated by the SSB burst length;

[0196] The first RO resource set is indicated by the beam illumination time period;

[0197] The first RO resource set is indicated by the association period of the SSB burst, or by the association period of the SSB corresponding to each SSB index in the SSB burst.

[0198] Optionally, the first information is used to indicate the first RO resource set within N SSB burst cycles, and the update cycle of the first information is N times the SSB burst cycle; where N is a positive integer.

[0199] Optionally, determining the first random access opportunity (RO) resource set includes:

[0200] The RO resources associated with the SSB burst whose interval with the SSB burst is less than a first threshold are identified as the first RO resources;

[0201] The first RO resource set is formed based on the first RO resource.

[0202] Optionally, determining the first random access opportunity (RO) resource set includes:

[0203] Receive second information, the second information being used to indicate that the beam coverage mode of the SSB burst is a first beam mode, the first beam mode including: the overlap of the beam coverage areas between different SSB bursts containing the same SSB index is greater than a second threshold.

[0204] Any RO resource associated with the SSB burst is identified as the first RO resource;

[0205] The first RO resource set is formed based on the first RO resource.

[0206] Optionally, determining the first random access opportunity (RO) resource set includes:

[0207] Receive second information, the second information is used to indicate that the beam coverage mode of the SSB burst is a second beam mode, the SSB burst includes a first SSB burst and a second SSB burst with adjacent beam illumination time periods, the second beam mode includes: the first SSB burst and the second SSB burst satisfy: the beam coverage area of ​​the second SSB burst surrounds, is adjacent to or covers the edge portion of the beam coverage area of ​​the first SSB burst;

[0208] If the first SSB burst meets the preset conditions, any RO resource associated with the first SSB burst during the beam illumination time period Td1 of the first SSB burst and the beam illumination time period Td2 of the second SSB burst is determined as the first RO resource of the first SSB burst; the preset conditions include: the reference signal received power (RSRP) measurement value of the first SSB burst is greater than the first RSRP threshold and less than the second RSRP threshold.

[0209] If the first SSB burst does not meet the preset condition, the first RO resource of the first SSB burst is determined based on the first information;

[0210] The first RO resources of the first SSB burst constitute the first RO resource set of the first SSB burst.

[0211] Optionally, the method further includes:

[0212] Receive third information, which is used to indicate the timing advance amount (TA) of the terminal.

[0213] Optionally, the third information includes the ratio between TA and a predetermined duration, wherein the predetermined duration includes any of the following: RACH configuration period, SSB burst length, beam illumination time period, association period, and the predetermined duration is agreed upon by the protocol and / or configured by the network device.

[0214] Optionally, the update period for the first information, the second information, and the third information is N times the SSB burst period; where N is a positive integer.

[0215] Optionally, the first information, the second information, and the third information each include at least one of the following: broadcast message, system message, and group public message.

[0216] Optionally, sending a random access request to the network device based on the first RO resource in the first RO resource set includes:

[0217] If the RSRP measurement value of the SSB burst is greater than the first RSRP threshold, the random access request is sent to the network device based on the first RO resource.

[0218] For a detailed description of steps 3101-3102, please refer to the above embodiment description.

[0219] In some embodiments, the steps and their optional implementations in other embodiments described before or after this embodiment, as well as other related parts in the specification, can be referred to, and will not be repeated here.

[0220] Figure 3B is a flowchart illustrating an access method according to an embodiment of the present disclosure. As shown in Figure 3B, this disclosure relates to an access method for a network device, the method comprising:

[0221] Step 3201: Receive a random access request sent by the receiving terminal based on the first RO resource in the first RO resource set.

[0222] Optionally, the first RO resource set includes at least one first RO resource, which is: a RO resource that can achieve communication among the RO resources associated with the SSB burst set of the synchronization signal block (SSB) or a first RO resource that can achieve communication among the RO resources associated with each SSB index in the SSB burst.

[0223] Optionally, the method further includes:

[0224] Send first information to the terminal, the first information being used to indicate the first RO resource set.

[0225] Optionally, the first information is used for at least one of the following:

[0226] The first RO resource set is indicated with the random access channel (RACH) configuration period as the granularity;

[0227] The first RO resource set is indicated by the SSB burst length;

[0228] The first RO resource set is indicated by the beam illumination time period;

[0229] The first RO resource set is indicated by the association period of the SSB burst, or by the association period of the SSB corresponding to each SSB index in the SSB burst.

[0230] Optionally, the first information is used to indicate the first RO resource set within N SSB burst cycles, and the update cycle of the first information is N times the SSB burst cycle; where N is a positive integer.

[0231] Optionally, the first RO resource includes: RO resources among the RO resources associated with the SSB burst whose interval with the SSB burst is less than a first threshold.

[0232] Optionally, the method further includes:

[0233] Send a second message to the terminal, the second message indicating that the beam coverage mode of the SSB burst is a first beam mode, the first beam mode including: the overlap of the beam coverage areas between different SSB bursts containing the same SSB index is greater than a second threshold; the first RO resource includes: any RO resource associated with the SSB burst.

[0234] Optionally, the method further includes:

[0235] Send a second message to the terminal. The second message is used to indicate that the beam coverage mode of the SSB burst is a second beam mode. The SSB burst includes a first SSB burst and a second SSB burst with adjacent beam illumination time periods. The second beam mode includes: the first SSB burst and the second SSB burst satisfy the following condition: the beam coverage area of ​​the second SSB burst surrounds, is adjacent to or covers the edge portion of the beam coverage area of ​​the first SSB burst.

[0236] Wherein, when the second information indicates that the beam coverage mode is the second beam mode, if the first SSB burst meets the preset conditions, the first RO resource of the first SSB burst includes: any RO resource associated with the first SSB burst within the beam illumination time period Td1 of the first SSB burst and the beam illumination time period Td2 of the second SSB burst; if the first SSB burst does not meet the preset conditions, the first RO resource of the first SSB burst is determined based on the first information; wherein, the preset conditions include: the reference signal received power (RSRP) measurement value of the first SSB burst is greater than the first RSRP threshold and less than the second RSRP threshold.

[0237] Optionally, the method further includes:

[0238] A third message is sent to the terminal, the third message being used to indicate the timing advance amount (TA) of the terminal.

[0239] Optionally, the third information includes the ratio between TA and a predetermined duration, wherein the predetermined duration includes any of the following: RACH configuration period, SSB burst length, beam illumination time period, association period, and the predetermined duration is agreed upon by the protocol and / or configured by the network device.

[0240] Optionally, the update period for the first information, the second information, and the third information is N times the SSB burst period; where N is a positive integer.

[0241] Optionally, the first information, the second information, and the third information each include at least one of the following: broadcast message, system message, and group public message.

[0242] Optionally, the random access request is sent when the RSRP measurement of the SSB burst is greater than a first RSRP threshold.

[0243] For a detailed description of step 3201, please refer to the above embodiment.

[0244] In some embodiments, the steps and their optional implementations in other embodiments described before or after this embodiment, as well as other related parts in the specification, can be referred to, and will not be repeated here.

[0245] The following is an exemplary description of the above method:

[0246] Beam illumination is a key feature of NTN Rel-19 for enhanced coverage. The specific mathematical principle is as follows: Depending on the configuration, an SSB can carry multiple beams Bm (e.g., 16 / 106). Let L be the number of SSBs in an SSB burst, and the actual number of SSBs transmitted is indicated by the SIB1-related IE, denoted as Lt below. Then, the beam size of an SSB burst is Bm * Lt. Let Td be the beam illumination time, Ts be the SSB burst period, and Ts be the scanning beam size within the Ts period. In the 3GPP Rel-19 NTN discussion, when Bm is sufficient, for example, under evaluation parameter 1-1, a 20ms SSB period can complete beam traversal within the corresponding elevation angle range. However, a 160ms SSB period can satisfy beam traversal under all evaluation parameters; therefore, the Rel-19 SSB period needs to be extended to 160ms. It can be expected that in future 6G discussions, the SSB cycle of the NTN system should include a baseline setting of 160ms.

[0247] The associated cycle has the following core functions / features:

[0248] 1. Within a single association cycle, the mapping from SSB to RO needs to ensure that the previous Lt SSB mappings are completed.

[0249] 2. The UE obtains the mapping relationship between the associated period and the RACH configuration period through a table, and obtains the smallest integer number of time periods in the corresponding row of the table that can achieve 1 under the corresponding PRACH period as the associated period.

[0250] When considering Ts mentioned above, the method for determining the correlation period may need to be changed.

[0251] Optionally, the NR protocol's SSB-to-RO mapping does not take into account beam illumination time, which may result in the following two situations:

[0252] 1. The RO resource corresponding to the UE in the center of the beam may not be within the beam illumination period, resulting in access failure.

[0253] 2. The RO resources corresponding to the UE at the beam edge cannot complete access in the adjacent beam and cannot obtain beam spatial diversity gain.

[0254] This disclosure proposes a new method for associating SSB to RO, which addresses the issues in the two scenarios mentioned above and improves user access efficiency.

[0255] As shown in Figure 1B above, the ROs in half-frames R1, R2, and R3 are jointly associated with SSB burst 1, which occurs in the first 5ms of the 20ms beam illumination time of SSB burst 1. According to the protocol text in the background description, the association period is 40ms. However, RO3 is located in the coverage period / area of ​​SSB burst 2. If the UE sends an RO at this time, the preamble on this RO cannot be detected by the satellite terminal unless the UE is at the edge of the beam corresponding to SSB burst 2 and the beam corresponding to SSB burst 1.

[0256] To avoid this problem, the UE needs to be informed which associated periods within a single SSB cycle (160ms) are allowed to access and which are not recommended to access. As shown in Figure 1, the periods corresponding to R1 / R2 / R4 are allowed to access, while the period corresponding to R3 is not recommended to access.

[0257] This configuration information is located in Broadcast Messages / System Messages / Group Public Messages (Control / Multicast).

[0258] The granularity of this configuration information unit is RACH configuration cycle / SSB burst length / beam illumination cycle / association cycle.

[0259] This configuration message is updated at a multiple of the SSB period, such as 160ms / 320ms.

[0260] The aforementioned time unit can be slot / frame / subframe / symbol / TTI

[0261] Sub-example 0-1

[0262] When the UE determines the association between SSB and RO, the frame number Frame 0 used is the frame number corresponding to the downlink timing. When the UE determines the uplink start point of the association period, it needs to compensate for the corresponding TA timing advance relative to the downlink frame number.

[0263] This timing advance information is located in broadcast messages / system messages / group public messages (control messages / multicast).

[0264] The granularity of this timing advance information unit is the RACH configuration period / SSB burst length / beam illumination period / association period. The update period of this timing advance message is a multiple of the SSB period, such as 160ms / 320ms.

[0265] The aforementioned time unit can be slot / frame / subframe / symbol / TTI

[0266] Example 1 (using the association period to ensure that UEs at the cell edge can use the covering adjacent beams for access)

[0267] The base station indicates a hopping beam pattern (i.e., the aforementioned first or second beam pattern). To resolve the RO mismatch issue, in Figure 2D, the lighting periods Td1 and Td2 containing SSB burst1 / 2 can use different beams. For example, the SSB beam of beam 2 can completely cover the adjacent SSB beam of beam 1. This hopping beam pattern ensures the complete availability of RO resources obtained according to the associated period rules within all beam lighting periods of Td1+Td2 and the SSB period. The base station needs to indicate / configure...

[0268] Beam skipping mode, i.e., beam pattern within the associated period.

[0269] RSRP reference threshold 2 (This RSRP reference value needs to be higher than the RSRP value of 1 that triggers random access behavior)

[0270] This configuration information is located in Broadcast Messages / System Messages / Group Public Messages (Control / Multicast).

[0271] After the UE obtains the above configuration information, the UE performs RSRP measurement. When the measured value is higher than threshold 1 and lower than threshold 2, the UE can continue to use the associated period concept and needs to execute one of the following rules:

[0272] - The UE selects the RO resource closest to the SSB for access.

[0273] - The period during which the UE performs access needs to be a RO within a period that is in the same association with the SSB burst, starting from frame 0.

[0274] Only when both of the above conditions are met can the UE use the definition of the associated period for access; otherwise, UE sub-example 0.

[0275] This disclosure also proposes an apparatus (also referred to as a communication device, etc.) for implementing any of the above methods. For example, an apparatus is proposed that includes units or modules for implementing the steps performed by the terminal in any of the above methods. Furthermore, another apparatus is proposed 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.

[0276] 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.

[0277] 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).

[0278] Figure 4A is a schematic diagram of the terminal structure proposed in an embodiment of this disclosure. The terminal is used to execute any of the above methods. In some embodiments, as shown in Figure 4A, the terminal may include at least one of a transceiver module, a processing module, etc. The processing module is used to determine a first random access opportunity RO resource set, the first RO resource set including at least one first RO resource, the first RO resource being: a RO resource that can achieve communication among the RO resources associated with the SSB burst set of the synchronization signal block (SSB), or the first RO resource being: a RO resource that can achieve communication among the RO resources associated with each SSB index in the SSB burst; the transceiver module is used to send a random access request to the network device based on the first RO resource in the first RO resource set.

[0279] Optionally, the transceiver module described above is used to perform at least one of the communication steps such as sending and / or receiving performed by the terminal in any of the above methods, which will not be elaborated here. Optionally, the processing module described above is used to perform at least one of the other steps performed by the terminal in any of the above methods, which will not be elaborated here.

[0280] Optionally, determining the first random access opportunity (RO) resource set includes:

[0281] Receive first information sent by the network device, the first information being used to indicate the first RO resource set;

[0282] The first RO resource set is determined based on the first information.

[0283] Optionally, the first information is used for at least one of the following:

[0284] The first RO resource set is indicated with the random access channel (RACH) configuration period as the granularity;

[0285] The first RO resource set is indicated by the SSB burst length;

[0286] The first RO resource set is indicated by the beam illumination time period;

[0287] The first RO resource set is indicated by the correlation period of the SSB burst.

[0288] Optionally, the first information is used to indicate the first RO resource set within N SSB burst cycles, and the update cycle of the first information is N times the SSB burst cycle; where N is a positive integer.

[0289] Optionally, determining the first random access opportunity (RO) resource set includes:

[0290] The RO resources associated with the SSB burst whose interval with the SSB burst is less than a first threshold are identified as the first RO resources;

[0291] The first RO resource set is formed based on the first RO resource.

[0292] Optionally, determining the first random access opportunity (RO) resource set includes:

[0293] Receive second information, the second information being used to indicate that the beam coverage mode of the SSB burst is a first beam mode, the first beam mode including: the overlap of the beam coverage areas between different SSB bursts containing the same SSB index is greater than a second threshold.

[0294] Any RO resource associated with the SSB burst is identified as the first RO resource;

[0295] The first RO resource set is formed based on the first RO resource.

[0296] Optionally, determining the first random access opportunity (RO) resource set includes:

[0297] Receive second information, the second information is used to indicate that the beam coverage mode of the SSB burst is a second beam mode, the SSB burst includes a first SSB burst and a second SSB burst with adjacent beam illumination time periods, the second beam mode includes: the first SSB burst and the second SSB burst satisfy: the beam coverage area of ​​the second SSB burst surrounds, is adjacent to or covers the edge portion of the beam coverage area of ​​the first SSB burst;

[0298] If the first SSB burst meets the preset conditions, any RO resource associated with the first SSB burst during the beam illumination time period Td1 of the first SSB burst and the beam illumination time period Td2 of the second SSB burst is determined as the first RO resource of the first SSB burst; the preset conditions include: the reference signal received power (RSRP) measurement value of the first SSB burst is greater than the first RSRP threshold and less than the second RSRP threshold.

[0299] If the first SSB burst does not meet the preset condition, the first RO resource of the first SSB burst is determined based on the first information;

[0300] The first RO resources of the first SSB burst constitute the first RO resource set of the first SSB burst.

[0301] Optionally, the method further includes:

[0302] Receive third information, which is used to indicate the timing advance amount (TA) of the terminal.

[0303] Optionally, the third information includes the ratio between TA and a predetermined duration, wherein the predetermined duration includes any of the following: RACH configuration period, SSB burst length, beam illumination time period, association period, and the predetermined duration is agreed upon by the protocol and / or configured by the network device.

[0304] Optionally, the update period for the first information, the second information, and the third information is N times the SSB burst period; where N is a positive integer.

[0305] Optionally, the first information, the second information, and the third information each include at least one of the following: broadcast message, system message, and group public message.

[0306] Optionally, sending a random access request to the network device based on the first RO resource in the first RO resource set includes:

[0307] If the RSRP measurement value of the SSB burst is greater than the first RSRP threshold, the random access request is sent to the network device based on the first RO resource.

[0308] Figure 4B is a schematic diagram of the structure of a network device proposed in an embodiment of this disclosure. The network device is used to perform any of the above methods. In some embodiments, as shown in Figure 4B, the network device may include at least one of a transceiver module, a processing module, etc. The transceiver module is used to receive a random access request sent by a terminal based on a first RO resource in a first random access opportunity RO resource set; wherein, the first RO resource set includes at least one first RO resource, and the first RO resource is: a RO resource that can achieve communication among the RO resources associated with the SSB burst set of the synchronization signal block (SSB), or the first RO resource can be: a RO resource that can achieve communication among the RO resources associated with each SSB index in the SSB burst.

[0309] Optionally, the transceiver module is used to perform at least one of the communication steps such as sending and / or receiving performed by the network device in any of the above methods, which will not be elaborated here. Optionally, the processing module is used to perform at least one of the other steps performed by the network device in any of the above methods, which will not be elaborated here.

[0310] Optionally, the method further includes:

[0311] Send first information to the terminal, the first information being used to indicate the first RO resource set.

[0312] Optionally, the first information is used for at least one of the following:

[0313] The first RO resource set is indicated with the random access channel (RACH) configuration period as the granularity;

[0314] The first RO resource set is indicated by the SSB burst length;

[0315] The first RO resource set is indicated by the beam illumination time period;

[0316] The first RO resource set is indicated by the correlation period of the SSB burst.

[0317] Optionally, the first information is used to indicate the first RO resource set within N SSB burst cycles, and the update cycle of the first information is N times the SSB burst cycle; where N is a positive integer.

[0318] Optionally, the first RO resource includes: RO resources among the RO resources associated with the SSB burst whose interval with the SSB burst is less than a first threshold.

[0319] Optionally, the method further includes:

[0320] Send a second message to the terminal, the second message indicating that the beam coverage mode of the SSB burst is a first beam mode, the first beam mode including: the overlap of the beam coverage areas between different SSB bursts containing the same SSB index is greater than a second threshold; the first RO resource includes: any RO resource associated with the SSB burst.

[0321] Optionally, the method further includes:

[0322] Send a second message to the terminal. The second message is used to indicate that the beam coverage mode of the SSB burst is a second beam mode. The SSB burst includes a first SSB burst and a second SSB burst with adjacent beam illumination time periods. The second beam mode includes: the first SSB burst and the second SSB burst satisfy the following condition: the beam coverage area of ​​the second SSB burst surrounds, is adjacent to or covers the edge portion of the beam coverage area of ​​the first SSB burst.

[0323] Wherein, when the second information indicates that the beam coverage mode is the second beam mode, if the first SSB burst meets the preset conditions, the first RO resource of the first SSB burst includes: any RO resource associated with the first SSB burst within the beam illumination time period Td1 of the first SSB burst and the beam illumination time period Td2 of the second SSB burst; if the first SSB burst does not meet the preset conditions, the first RO resource of the first SSB burst is determined based on the first information; wherein, the preset conditions include: the reference signal received power (RSRP) measurement value of the first SSB burst is greater than the first RSRP threshold and less than the second RSRP threshold.

[0324] Optionally, the method further includes:

[0325] A third message is sent to the terminal, the third message being used to indicate the timing advance amount (TA) of the terminal.

[0326] Optionally, the third information includes the ratio between TA and a predetermined duration, wherein the predetermined duration includes any of the following: RACH configuration period, SSB burst length, beam illumination time period, association period, and the predetermined duration is agreed upon by the protocol and / or configured by the network device.

[0327] Optionally, the update period for the first information, the second information, and the third information is N times the SSB burst period; where N is a positive integer.

[0328] Optionally, the first information, the second information, and the third information each include at least one of the following: broadcast message, system message, and group public message.

[0329] Optionally, the random access request is sent when the RSRP measurement of the SSB burst is greater than a first RSRP threshold.

[0330] Figure 5A is a schematic diagram of the structure of the communication device 5100 proposed in an embodiment of this disclosure. The communication device 5100 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 5100 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.

[0331] As shown in Figure 5A, the communication device 5100 is used to execute any of the above methods. In some embodiments, the communication device 5100 includes one or more processors 5101. The processor 5101 may be a general-purpose processor or a special-purpose processor, such as a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processing unit may be used to control communication devices (e.g., base stations, baseband chips, terminal devices, terminal device chips, DUs or CUs, etc.), execute programs, and process program data. Optionally, the communication device 5100 is used to execute any of the above methods. Optionally, one or more processors 5101 are used to invoke instructions to cause the communication device 5100 to execute any of the above methods.

[0332] In some embodiments, the communication device 5100 further includes one or more transceivers 5102. When the communication device 5100 includes one or more transceivers 5102, the transceiver 5102 performs at least one of the communication steps such as sending and / or receiving in the above-described method, and the processor 5101 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, transmitting unit, transmitter, transmitting circuit, etc., can be used interchangeably; the terms receiver, receiving unit, receiver, receiving circuit, etc., can be used interchangeably.

[0333] In some embodiments, the communication device 5100 further includes one or more memories 5103 for storing data and / or instructions. Optionally, one or more processors 5101 are used to invoke instructions stored in the memory 5103 to cause the communication device 5100 to perform any of the above methods. Optionally, all or part of the memory 5103 may also be located outside the communication device 5100. In an optional embodiment, the communication device 5100 may include one or more interface circuits 5104. Optionally, the interface circuit 5104 is connected to the memory 5102 and can be used to receive data and / or instructions from the memory 5102 or other devices, and can be used to send data and / or instructions to the memory 5102 or other devices. For example, the interface circuit 5104 can read data and / or instructions stored in the memory 5102 and send the data and / or instructions to the processor 5101.

[0334] The communication device 5100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 5100 described in this disclosure is not limited thereto, and the structure of the communication device 5100 may not be limited by FIG. 5A. The communication device may be a standalone device or may be 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, programs and / or instructions; (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.

[0335] Figure 5B is a schematic diagram of the structure of chip 5200 according to an embodiment of this disclosure. For cases where the communication device 5100 can be a chip or a chip system, please refer to the schematic diagram of chip 5200 shown in Figure 5B, but it is not limited thereto.

[0336] Chip 5200 includes one or more processors 5201. Chip 5200 is used to perform any of the methods described above.

[0337] In some embodiments, chip 5200 further includes one or more interface circuits 5202. Optionally, terms such as interface circuit, interface, and transceiver pin can be used interchangeably. In some embodiments, chip 5200 further includes one or more memories 5203 for storing data and / or instructions. Optionally, all or part of the memories 5203 may be located outside of chip 5200. Optionally, the interface circuit 5202 is connected to the memories 5203, and the interface circuit 5202 can be used to receive data and / or instructions from the memories 5203 or other devices, and the interface circuit 5202 can be used to send data and / or instructions to the memories 5203 or other devices. For example, the interface circuit 5202 can read data and / or instructions stored in the memories 5203 and send the data and / or instructions to the processor 5201.

[0338] In some embodiments, the interface circuit 5202 performs at least one of the communication steps, such as sending and / or receiving, in the above-described method. For example, the interface circuit 5202 performing the communication steps, such as sending and / or receiving, in the above-described method means that the interface circuit 5202 performs data and / or instruction interaction between the processor 5201, the chip 5200, the memory 5203, or the transceiver device. In some embodiments, the processor 5201 performs at least one of the other steps.

[0339] 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.

[0340] This disclosure also proposes a storage medium storing instructions that, when executed on a communication device, cause the communication device 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.

[0341] This disclosure also proposes a program product, including a program and / or instructions, which, when executed by a communication device, cause the communication device to perform any of the above methods. Optionally, the program product is a computer program product. Optionally, the program product is stored on the storage medium.

[0342] This disclosure also proposes a computer program that, when run on a computer, causes the computer to perform any of the above methods.

[0343] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this disclosure are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program can be transferred from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., high-density digital video discs (DVDs)), or semiconductor media (e.g., solid-state drives (SSDs)).

[0344] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this disclosure.

[0345] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0346] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

An access method, characterized in that, The method, executed by a terminal, includes: Determine the first random access timing RO resource set, the first RO resource set includes at least one first RO resource, the first RO resource is: the RO resource that can realize communication in the RO resource associated with the burst set of the synchronization signal block SSB; A random access request is sent to the network device based on the first RO resource in the first RO resource set. The method as described in claim 1, characterized in that, The determination of the first random access opportunity (RO) resource set includes: Receive first information sent by the network device, the first information being used to indicate the first RO resource set; The first RO resource set is determined based on the first information. The method as described in claim 2, characterized in that, The first information is used for at least one of the following: The first RO resource set is indicated with the random access channel (RACH) configuration period as the granularity; The first RO resource set is indicated by the SSB burst length; The first RO resource set is indicated by the beam illumination time period; The first RO resource set is indicated by the correlation period of the SSB burst. The method as described in claim 2 or 3, characterized in that, The first information is used to indicate the first RO resource set within N SSB burst cycles; where N is a positive integer. The method as described in any one of claims 1-4, characterized in that, The determination of the first random access opportunity (RO) resource set includes: Among the RO resources associated with the SSB burst, the RO resources whose interval with the SSB burst is less than a first threshold are determined as the first RO resources; The first RO resource set is formed based on the first RO resource. The method as described in any one of claims 1-5, characterized in that, The determination of the first random access opportunity (RO) resource set includes: Receive second information, the second information being used to indicate that the beam coverage mode of the SSB burst is a first beam mode, the first beam mode including: the overlap of the beam coverage areas between different SSB bursts containing the same SSB index is greater than a second threshold. Any RO resource associated with the SSB burst is identified as the first RO resource; The first RO resource set is formed based on the first RO resource. The method as described in any one of claims 2-5, characterized in that, The determination of the first random access opportunity (RO) resource set includes: Receive second information, the second information is used to indicate that the beam coverage mode of the SSB burst is a second beam mode, the SSB burst includes a first SSB burst and a second SSB burst with adjacent beam illumination time periods, the second beam mode includes: the first SSB burst and the second SSB burst satisfy: the beam coverage area of ​​the second SSB burst surrounds, is adjacent to or covers the edge portion of the beam coverage area of ​​the first SSB burst; If the first SSB burst meets the preset conditions, any RO resource associated with the first SSB burst during the beam illumination time period Td1 of the first SSB burst and the beam illumination time period Td2 of the second SSB burst is determined as the first RO resource of the first SSB burst; the preset conditions include: the reference signal received power (RSRP) measurement value of the first SSB burst is greater than the first RSRP threshold and less than the second RSRP threshold. If the first SSB burst does not meet the preset condition, the first RO resource of the first SSB burst is determined based on the first information; The first RO resources of the first SSB burst constitute the first RO resource set of the first SSB burst. The method as described in claim 1, characterized in that, The method further includes: Receive third information, which is used to indicate the timing advance amount (TA) of the terminal. The method as described in claim 8, characterized in that, The third information includes the ratio between TA and a predetermined duration, wherein the predetermined duration includes any of the following: RACH configuration period, SSB burst length, beam illumination time period, association period, and the predetermined duration is agreed upon by the protocol and / or configured by the network device. The method as described in any one of claims 2 to 9, characterized in that, The update period for the first, second, and third information is N times the SSB burst period; where N is a positive integer. The method as described in any one of claims 2 to 10, characterized in that, The first information, the second information, and the third information each include at least one of the following: broadcast message, system message, and group public message. The method as described in any one of claims 1-11, characterized in that, Sending a random access request to the network device based on the first RO resource in the first RO resource set includes: If the RSRP measurement value of the SSB burst is greater than the first RSRP threshold, the random access request is sent to the network device based on the first RO resource. An access method, characterized in that, Performed by a network device, the method includes: The receiving terminal sends a random access request based on a first RO resource in the first random access timing RO resource set; wherein, the first RO resource set includes at least one first RO resource, and the first RO resource is: a RO resource that can achieve communication in the RO resources associated with the synchronization signal block SSB burst set burst. The method as described in claim 13, characterized in that, The method further includes: Send first information to the terminal, the first information being used to indicate the first RO resource set. The method as described in claim 14, characterized in that, The first information is used for at least one of the following: The first RO resource set is indicated with the random access channel (RACH) configuration period as the granularity; The first RO resource set is indicated by the SSB burst length; The first RO resource set is indicated by the beam illumination time period; The first RO resource set is indicated by the correlation period of the SSB burst. The method as described in claim 14 or 15, characterized in that, The first information is used to indicate the first RO resource set within N SSB burst cycles; where N is a positive integer. The method as described in any one of claims 13-16, characterized in that, The first RO resource includes: RO resources associated with the SSB burst whose interval with the SSB burst is less than a first threshold. The method as described in any one of claims 13-17, characterized in that, The method further includes: Send a second message to the terminal, the second message indicating that the beam coverage mode of the SSB burst is a first beam mode, the first beam mode including: the overlap of the beam coverage areas between different SSB bursts containing the same SSB index is greater than a second threshold; the first RO resource includes: any RO resource associated with the SSB burst. The method as described in any one of claims 14-17, characterized in that, The method further includes: Send a second message to the terminal. The second message is used to indicate that the beam coverage mode of the SSB burst is a second beam mode. The SSB burst includes a first SSB burst and a second SSB burst with adjacent beam illumination time periods. The second beam mode includes: the first SSB burst and the second SSB burst satisfy the following condition: the beam coverage area of ​​the second SSB burst surrounds, is adjacent to or covers the edge portion of the beam coverage area of ​​the first SSB burst. Wherein, when the second information indicates that the beam coverage mode is the second beam mode, if the first SSB burst meets the preset conditions, the first RO resource of the first SSB burst includes: any RO resource associated with the first SSB burst within the beam illumination time period Td1 of the first SSB burst and the beam illumination time period Td2 of the second SSB burst; if the first SSB burst does not meet the preset conditions, the first RO resource of the first SSB burst is determined based on the first information; wherein, the preset conditions include: the reference signal received power (RSRP) measurement value of the first SSB burst is greater than the first RSRP threshold and less than the second RSRP threshold. The method as described in claim 13, characterized in that, The method further includes: A third message is sent to the terminal, the third message being used to indicate the timing advance amount (TA) of the terminal. The method as described in claim 20, characterized in that, The third information includes the ratio between TA and a predetermined duration, wherein the predetermined duration includes any of the following: RACH configuration period, SSB burst length, beam illumination time period, association period, and the predetermined duration is agreed upon by the protocol and / or configured by the network device. The method as described in any one of claims 14 to 21, characterized in that, The update period for the first, second, and third information is N times the SSB burst period; where N is a positive integer. The method as described in any one of claims 14 to 22, characterized in that, The first information, the second information, and the third information each include at least one of the following: broadcast message, system message, and group public message. The method as described in any one of claims 13-23, characterized in that, The random access request is sent when the RSRP measurement of the SSB burst is greater than a first RSRP threshold. A terminal, characterized in that, include: The processing module is used to determine the first random access timing RO resource set, the first RO resource set including at least one first RO resource, the first RO resource being: the RO resource that can achieve communication among the RO resources associated with the synchronization signal block SSB burst set; The transceiver module is used to send a random access request to the network device based on the first RO resource in the first RO resource set. A network device, characterized in that, include: The transceiver module is used to receive a random access request sent by the terminal based on a first RO resource in the first random access timing RO resource set; wherein, the first RO resource set includes at least one first RO resource, and the first RO resource is: a RO resource that can achieve communication among the RO resources associated with the burst set of the synchronization signal block SSB. A terminal, characterized in that, include: One or more processors; The terminal is used to execute the method according to any one of claims 1 to 12. A network device, characterized in that, include: One or more processors; The network device is used to perform the method according to any one of claims 13 to 24. A communication system, characterized in that, The method includes a terminal and a network device, wherein the terminal is configured to implement the method according to any one of claims 1 to 12, and the terminal is configured to implement the method according to any one of claims 13 to 24. A storage medium storing instructions, characterized in that, When the instructions are executed on a communication device, the communication device performs the method as claimed in any one of claims 1 to 12 or claims 13 to 24. A program product, characterized in that, It includes a computer program that, when executed by a communication device, implements the method as claimed in any one of claims 1 to 12 or 13 to 24.

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