Method for random access, and device, system and storage medium

Abstract

The embodiments of the present disclosure relate to the technical field of communications. Disclosed are a method for random access, and an apparatus and a computer-readable storage medium. The method for random access comprises: on the basis of information related to sub-band full duplex (SBFD), determining a first transmission power for transmitting a random access preamble on an uplink sub-band of the SBFD; and on the basis of the first transmission power, transmitting the random access preamble on the uplink sub-band of the SBFD. In the embodiments of the present disclosure, on the basis of a first transmission power determined from information related to SBFD, a random access preamble is transmitted on an uplink sub-band of the SBFD, and thus the speed of random access can be increased, thereby achieving the aim of improving the performance of a wireless communication network.

Description

Method, device, system and storage medium for random access Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular to a method, device, system, and storage medium for random access. Background Art

[0002] When performing random access, a terminal can use the power parameters configured by the target cell's base station. For example, if a terminal can send a preamble using the configured power parameters, the power parameters configured by network equipment are typically not too high, resulting in a lower probability of successful detection by the base station. Consequently, more random access preamble transmissions are required, resulting in a longer random access time.

[0003] Summary of the Invention

[0004] Embodiments of the present disclosure provide a method, device, system, and storage medium for random access.

[0005] According to a first aspect of an embodiment of the present disclosure, a method for random access is provided, where the method is performed by a terminal and includes:

[0006] Determining, based on information related to sub-band full-duplex (SBFD), a first transmit power for transmitting a random access preamble in an uplink sub-band of the SBFD;

[0007] A random access preamble is transmitted in the uplink subband of the SBFD according to the first transmit power.

[0008] According to a second aspect of the present disclosure, a method for random access is provided. The method is performed by a network device, and the method includes:

[0009] A random access preamble code is received by a terminal in an uplink subband of subband full-duplex (SBFD), where a first transmit power of the random access preamble code is determined by the terminal based on information related to the SBFD.

[0010] According to a third aspect of the present disclosure, a terminal is provided, including:

[0011] A first processing module is configured to determine, based on information related to sub-band full-duplex (SBFD), a first transmit power for transmitting a random access preamble in an uplink sub-band of SBFD;

[0012] The first transceiver module is configured to transmit a random access preamble in the uplink subband of the SBFD according to the first transmit power.

[0013] A fourth aspect of the embodiments of the present disclosure provides a network device, including:

[0014] The second transceiver module is configured to receive a random access preamble code transmitted by a terminal in an uplink subband of subband full-duplex (SBFD), where the first transmit power of the random access preamble code is determined by the terminal based on information related to SBFD.

[0015] According to a fifth aspect of the present disclosure, a terminal is provided, including:

[0016] one or more processors;

[0017] The terminal is used to execute the optional implementation of the aforementioned first aspect.

[0018] According to a sixth aspect of the present disclosure, a network device is provided, including:

[0019] one or more processors;

[0020] The network device is used to execute the optional implementation method of the aforementioned second aspect.

[0021] In a seventh aspect of an embodiment of the present disclosure, a communication system is proposed, including a terminal and a network device, wherein the terminal is used to implement the method described in the optional implementation manner of the first aspect, and the network device is used to implement the method described in the optional implementation manner of the second aspect.

[0022] According to an eighth aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, in which executable instructions are stored. The executable instructions are loaded and executed by the processor to implement the method described in the optional implementation of the first or second aspect above.

[0023] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0025] FIG1a is a schematic structural diagram of a wireless communication system according to an exemplary embodiment;

[0026] FIG1b is a schematic structural diagram of a sub-band full-duplex system according to an exemplary embodiment;

[0027] FIG2 is a flow chart showing a method for random access according to an exemplary embodiment;

[0028] FIG3a is a schematic flow chart of a method for random access according to an embodiment of the present disclosure;

[0029] FIG3 b is a schematic flow chart of a method for random access according to an embodiment of the present disclosure;

[0030] FIG3c is a schematic flow chart of a method for random access according to an embodiment of the present disclosure;

[0031] FIG4a is a schematic flow chart of a method for random access according to an embodiment of the present disclosure;

[0032] FIG4 b is a schematic flow chart of a method for random access according to an embodiment of the present disclosure;

[0033] FIG5 is a schematic flow chart of a method for random access according to an embodiment of the present disclosure;

[0034] FIG6 a is a schematic structural diagram of a terminal proposed in an embodiment of the present disclosure;

[0035] FIG6 b is a schematic diagram of the structure of a network device proposed in an embodiment of the present disclosure;

[0036] FIG7a is a schematic structural diagram of a communication device proposed in an embodiment of the present disclosure;

[0037] FIG7 b is a schematic structural diagram of a chip proposed in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0038] The embodiments of the present disclosure provide a method, a device, a communication system, and a storage medium for random access.

[0039] In a first aspect, an embodiment of the present disclosure provides a method for random access, which is performed by a terminal and includes:

[0040] Determining, based on information related to sub-band full-duplex (SBFD), a first transmit power for transmitting a random access preamble in an uplink sub-band of the SBFD;

[0041] A random access preamble is transmitted in the uplink subband of the SBFD according to the first transmit power.

[0042] In the above embodiment, the random access preamble is transmitted in the uplink subband of SBFD by using the first transmit power determined based on the information related to SBFD, thereby accelerating the random access speed and improving the performance of the wireless communication network.

[0043] In combination with some embodiments of the first aspect, in some embodiments, the information related to SBFD is specified by a protocol; or, the information related to SBFD is configured by a network device.

[0044] In the above embodiment, the information related to SBFD is specified by the protocol or configured by the network device, which can make the manner in which the terminal obtains the information related to SBFD more flexible.

[0045] In conjunction with some embodiments of the first aspect, in some embodiments, the information related to SBFD is configured by the network device through at least one of the following:

[0046] System messages;

[0047] Dedicated Radio Resource Control (RRC) signaling.

[0048] In the above embodiment, the network configures the information related to SBFD through a system message or dedicated RRC signaling, which can ensure that the terminal can obtain the information related to SBFD.

[0049] In combination with some embodiments of the first aspect, in some embodiments, the information related to SBFD includes a power offset related to SBFD.

[0050] In conjunction with some embodiments of the first aspect, in some embodiments, determining the first transmit power for transmitting the random access preamble in the uplink subband of the SBFD includes:

[0051] determining the first transmit power according to the second transmit power for transmitting the random access preamble and the power offset related to the SBFD;

[0052] The second transmit power includes any one of the following:

[0053] The transmit power of the random access preamble set by the media access control (MAC) layer during the 4-step random access process;

[0054] The transmit power of the random access preamble set by the physical layer during the 4-step random access process;

[0055] The transmit power of the random access preamble during the 2-step random access process.

[0056] In conjunction with some embodiments of the first aspect, in some embodiments, if a random access preamble is transmitted multiple times in an uplink subband of SBFD, determining the first transmit power based on the second transmit power for transmitting the random access preamble and the power offset related to SBFD includes:

[0057] Determine the sum of the second transmit power and the power offset related to SBFD as the first transmit power for transmitting the random access preamble code in the uplink subband of SBFD at that time;

[0058] The power offset associated with SBFD does not change with the number of times the random access preamble is transmitted in the uplink subband of SBFD; or

[0059] The power offset associated with SBFD is proportional to the number of times the random access preamble is transmitted in the uplink subband of SBFD.

[0060] In the above embodiment, by increasing the power offset related to SBFD based on the existing transmit power for transmitting the random access preamble, the transmit power for transmitting the random access preamble in the uplink subband of SBFD can be increased to complete random access faster.

[0061] With reference to some embodiments of the first aspect, in some embodiments, the information related to SBFD includes a power boost step size related to SBFD.

[0062] In conjunction with some embodiments of the first aspect, in some embodiments, determining the first transmit power for transmitting the random access preamble in the uplink subband of the SBFD includes:

[0063] determining the first transmit power according to a second transmit power for transmitting a random access preamble, the power boost step size associated with SBFD, and a number of times the random access preamble is transmitted in an uplink subband of SBFD;

[0064] The second transmit power includes any one of the following:

[0065] The transmit power of the random access preamble set by the MAC layer during the 4-step random access process;

[0066] The transmit power of the random access preamble during the 2-step random access process.

[0067] In conjunction with some embodiments of the first aspect, in some embodiments, if a random access preamble is transmitted multiple times in an uplink subband of SBFD, determining the first transmit power based on the second transmit power for transmitting the random access preamble, the power boost step size related to SBFD, and the number of times the random access preamble is transmitted in the uplink subband of SBFD includes:

[0068] The product of the power boost step size related to SBFD and the number of times the random access preamble code is transmitted in the uplink subband of SBFD, and the sum of the second transmit power are determined as the first transmit power of the random access preamble code transmitted in the uplink subband of SBFD at that time.

[0069] In the above embodiment, by increasing the product of the power boost step and the number of times the random access preamble is transmitted in the uplink subband of SBFD on the basis of the existing transmission power of the random access preamble, the transmission power of the random access preamble transmitted in the uplink subband of SBFD can be effectively increased, thereby shortening the time to complete random access.

[0070] In combination with some embodiments of the first aspect, in some embodiments, the method further includes: determining to transmit a random access preamble in an uplink subband of SBFD.

[0071] In the above embodiment, determining to transmit the random access preamble in the uplink subband of SBFD can provide a basis for determining the transmit power of the random access preamble in the uplink subband of SBFD.

[0072] In conjunction with some embodiments of the first aspect, in some embodiments, determining to transmit a random access preamble in an uplink subband of SBFD includes:

[0073] Each time the time domain resource used for transmitting the random access preamble satisfies the first condition, determining to transmit the random access preamble in the uplink subband of the SBFD;

[0074] The first condition includes any one of the following:

[0075] The time domain resources used to transmit the random access preamble include at least one time domain resource related to SBFD;

[0076] The number of time domain resources related to SBFD included in the time domain resources used to transmit the random access preamble is greater than a first threshold;

[0077] The proportion of time domain resources related to SBFD included in the time domain resources used to transmit the random access preamble is greater than a second threshold.

[0078] In the above embodiment, by judging whether the time domain resources used for transmitting the random access preamble code each time meet the first condition, it can be accurately determined whether the random access preamble code is transmitted in the uplink subband of SBFD at that time, thereby providing a basis for determining the transmission power of the random access preamble code transmitted on the uplink subband of SBFD.

[0079] In combination with some embodiments of the first aspect, in some embodiments, at least one of the first threshold and the second threshold is specified by a protocol; or, at least one of the first threshold and the second threshold is configured by a network device.

[0080] In conjunction with some embodiments of the first aspect, in some embodiments, at least one of the first threshold and the second threshold is configured by the network device through at least one of the following:

[0081] System messages;

[0082] Dedicated RRC signaling

[0083] In a second aspect, an embodiment of the present disclosure provides a method for random access, which is performed by a network device and includes:

[0084] A random access preamble code is received by a terminal in an uplink subband of subband full-duplex (SBFD), where a first transmit power of the random access preamble code is determined by the terminal based on information related to the SBFD.

[0085] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0086] Sending a first message to the terminal, where the first message carries the SBFD-related information.

[0087] In combination with some embodiments of the second aspect, in some embodiments, the information related to SBFD includes a power offset related to SBFD; or, the information related to SBFD includes a power boost step related to SBFD.

[0088] In combination with some embodiments of the second aspect, in some embodiments, the first message also carries: at least one of a first threshold and a second threshold, and at least one of the first threshold and the second threshold is used by the terminal to determine whether to transmit a random access preamble code in the uplink subband of SBFD.

[0089] In conjunction with some embodiments of the second aspect, in some embodiments, the first message includes at least one of the following:

[0090] System messages;

[0091] Dedicated Radio Resource Control (RRC) signaling.

[0092] In a third aspect, an embodiment of the present disclosure provides a terminal, including:

[0093] A first processing module is configured to determine, based on information related to sub-band full-duplex (SBFD), a first transmit power for transmitting a random access preamble in an uplink sub-band of SBFD;

[0094] The first transceiver module is configured to transmit a random access preamble in the uplink subband of the SBFD according to the first transmit power.

[0095] In a fourth aspect, an embodiment of the present disclosure provides a network device, including:

[0096] The second transceiver module is configured to receive a random access preamble code transmitted by a terminal in an uplink subband of subband full-duplex (SBFD), where the first transmit power of the random access preamble code is determined by the terminal based on information related to SBFD.

[0097] In a fifth aspect, an embodiment of the present disclosure provides a terminal, including:

[0098] one or more processors;

[0099] The terminal executes the method described in the optional implementation manner of the first aspect.

[0100] According to a sixth aspect of an embodiment of the present disclosure, a network device is provided, including:

[0101] one or more processors;

[0102] In which, the network device executes the method described in the optional implementation manner of the second aspect.

[0103] In the seventh aspect, an embodiment of the present disclosure proposes a communication system, including a terminal and a network device, wherein the terminal is used to implement the method described in the optional implementation mode of the first aspect, and the network device is used to implement the method described in the optional implementation mode of the second aspect.

[0104] In an eighth aspect, an embodiment of the present disclosure proposes a storage medium, which stores instructions. When the instructions are executed on a communication device, the communication device executes the method described in the optional implementation of the first aspect or the second aspect.

[0105] In a ninth aspect, an embodiment of the present disclosure proposes a program product. When the program product is executed by a communication device, the communication device executes the method described in the optional implementation manner of the first aspect or the second aspect.

[0106] In a tenth aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the method described in the optional implementation of the first aspect or the second aspect.

[0107] In an eleventh aspect, an embodiment of the present disclosure proposes a chip or a chip system, which includes a processing circuit for executing the method described in the optional implementation of the first or second aspect above.

[0108] It is understandable that the above-mentioned apparatus for random access, communication equipment, communication system, storage medium, program product, and computer program are all used to perform the method proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding methods and will not be repeated here. Among them, the communication equipment can be a terminal or a network device.

[0109] The present disclosure provides a method, apparatus, communication device, communication system, and storage medium for random access. In some embodiments, the terms "method for random access" and "information processing method" and "for random access" are interchangeable; "apparatus for random access" and "information processing apparatus" and "communication apparatus" are interchangeable; and "information processing system" and "communication system" are interchangeable.

[0110] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the embodiments of the present disclosure. In the absence of contradiction, each step in a certain 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 certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0111] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0112] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present disclosure.

[0113] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article may be understood as a singular expression or a plural expression.

[0114] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0115] In some embodiments, the terms "at least one of", "at least one of", "at least one of", "one or more", "a plurality of", "multiple", etc. can be used interchangeably.

[0116] In the embodiments of the present disclosure, descriptions such as “at least one of A, B, C…”, “A and / or B and / or C…”, etc. include the situation where any one of A, B, C… exists alone, and also include any combination of any multiple of A, B, C…, and each situation can exist alone; for example, “at least one of A, B, C” includes the situation where A exists alone, B exists alone, C exists alone, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B, and C; for example, A and / or B includes the situation where A exists alone, B exists alone, and the combination of A and B.

[0117] In some embodiments, descriptions such as "in one case A, in another case B," or "in response to one case A, in response to another case B," may include the following technical solutions depending on the situation: executing A independently of B (in some embodiments, A); executing B independently of A (in some embodiments, B); selectively executing A and B (in some embodiments, selecting between A and B); and executing both A and B (in some embodiments, A and B). The same applies when there are more branches, such as A, B, and C.

[0118] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different. For another example, if the description object is "information", then the "first configuration" and the "second configuration" can be the same information or different information, and their contents can be the same or different.

[0119] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0120] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0121] In some embodiments, terms such as "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 less than", and "above" can be replaced with each other, and terms such as "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" can be replaced with each other.

[0122] In some embodiments, devices, etc. can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as "device", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", and "subject" can be used interchangeably.

[0123] In some embodiments, the terms "access network device (AN device)", "radio access network device (RAN device)", "base station (BS)", "radio base station" "fixed station", "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)", "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "carrier", "component carrier", "bandwidth part (BWP)" and the like may be used interchangeably.

[0124] In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal", "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, etc. can be used interchangeably.

[0125] In some embodiments, the access network device, the core network device, or the network device can be replaced by a terminal. For example, the various embodiments of the embodiments of the present disclosure can also be applied to a structure in which the communication between the access network device, the core network device, or the network device and the terminal is replaced by communication between multiple terminals (for example, which can also be referred to as device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it can also be set as a structure in which the terminal has all or part of the functions of the access network device. In addition, languages ​​such as "uplink" and "downlink" can also be replaced with languages ​​corresponding to communication between terminals (for example, "side").

[0126] For example, an uplink channel, a downlink channel, etc. may be replaced by a side channel, and an uplink, a downlink, etc. may be replaced by a sidelink.

[0127] In some embodiments, terms such as "uplink", "uplink", "physical uplink" can be interchangeable, and terms such as "downlink", "downlink", "physical downlink" can be interchangeable, and terms such as "side", "sidelink", "side communication", "sidelink communication", "direct connection", "direct link", "direct communication", and "direct link communication" can be interchangeable.

[0128] In some embodiments, the terms "downlink control information (DCI)", "downlink (DL) assignment", "DL DCI", "uplink (UL) grant", "UL DCI" and the like may be used interchangeably.

[0129] In some embodiments, terms such as "physical downlink shared channel (PDSCH)" and "DL data" can be used interchangeably, and terms such as "physical uplink shared channel (PUSCH)" and "UL data" can be used interchangeably.

[0130] In some embodiments, the determination or judgment can be performed by a value represented by 1 bit (0 or 1), or by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a predetermined value), but is not limited thereto.

[0131] In some embodiments, "network" can be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

[0132] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0133] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0134] FIG1a is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

[0135] As shown in FIG. 1 a , a communication system 100 includes a terminal 101 and a network device 102 .

[0136] In some embodiments, the terminal 101 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited thereto.

[0137] In some embodiments, the network device 102 may include at least one of an access network device and a core network device.

[0138] In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network. The network device may include an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved nodeB (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a wireless fidelity (WiFi) system, but is not limited thereto.

[0139] In some embodiments, the technical solutions of the embodiments of the present disclosure may be applicable to the Open RAN architecture. In this case, the interfaces between or within the network devices involved in the embodiments of the present disclosure may become internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces may be implemented through software or programs.

[0140] In some embodiments, the access network device can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the network device, with the functions of some protocol layers centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0141] In some embodiments, the access network device may be a single device, or may be multiple devices or a group of devices, each including all or part of a first network element, a second network element, etc. The network element may be virtual or physical. The network device may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0142] In some embodiments, a core network device may be a device including one or more network elements, or may be multiple devices or device groups, each including all or part of the one or more network elements. The network element may be virtual or physical. The core network may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0143] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

[0144] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1a, or a portion thereof, but are not limited thereto. The entities shown in FIG1a are illustrative only. The communication system may include all or a portion of the entities shown in FIG1a, or may include other entities other than those shown in FIG1a. The number and form of the entities may be arbitrary. The connection relationship between the entities is illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0145] The embodiments of the present disclosure may 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 (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (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), other systems utilizing random access, and next-generation systems based on and extending these systems. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0146] First, the related technologies in this disclosure are described:

[0147] First, when the UE performs a random access (RA) procedure, the process of setting the random access preamble transmit power at the medium access control (MAC) layer is as follows:

[0148] For each random access preamble, the MAC entity shall perform the following operations:

[0149] 1. If the value of the preamble transmission counter (PREAMBLE_TRANSMISSION_COUNTER) is greater than 1;

[0150] 2. If a notification to suspend the power boost counter has not been received from the lower layer;

[0151] 3. If no LBT failure indication is received from lower layers for the last random access preamble transmission; and

[0152] 4. If the selected Synchronization Signal Block (SSB) or Channel-State-Information Reference Signal (CSI-RS) has not changed since the last random access preamble transmission:

[0153] Then, the value of the preamble power boost counter (PREAMBLE_POWER_RAMPING_COUNTER) is increased by 1.

[0154] 5. Select the value of DELTA_PREAMBLE, where DELTA_PREAMBLE is the power offset selected based on the format of the preamble;

[0155] 6. Set the preamble target received power (PREAMBLE_RECEIVED_TARGET_POWER) to preambleReceivedTargetPower + DELTA_PREAMBLE + (the value of the preamble power boost counter – 1) × the preamble power boost step size (PREAMBLE_POWER-RAMPING_STEP) + 2-step random access power offset (POWER_OFFSET_2STEP_RA);

[0156] 7. Calculate the Random Access-Radio Network Temporary Identity (RA-RNTI) associated with the Physical Random Access Channel (PRACH) opportunity on which the Random Access Preamble is sent, except for the Contention-Free Random Access Preamble used for beam failure recovery requests.

[0157] 8. Instruct the physical layer to use the RA-RNTI (if available), preamble index (Preamble_INDEX) and preamble target received power corresponding to the selected PRACH opportunity to send the random access preamble.

[0158] The initial setting of the two-step random access power offset is 0dB and is assigned in the following conditions:

[0159] 1. If the target random access (RA_TYPE) is switched from 2-step random access to 4-step random access during this random access procedure:

[0160] 2. Set the 2-step random access power offset to (the value of the random access preamble power boost counter – 1) × (MSG A_Random access preamble power boost step size – Random access preamble power boost step size). MSG A is the abbreviation for Message A.

[0161] Second, the process of setting the random access preamble transmit power at the physical layer is as follows:

[0162] The UE determines the transmission power of the physical random access channel (PRACH) on the activated uplink (UL) bandwidth part (BWP) b of carrier f of cell c based on the downlink (DL) reference signal (RS) of cell c in transmission opportunity i as follows:

[0163] P PRACH,b,f,c (i) = min{P CMAX,f,c (i),P PRACH,target,f,c +PL b,f,c}[dBm],

[0164] Among them, P CMAX，f，c (i) is the maximum output power configured by the UE as defined in the protocol for carrier f of cell c within transmission opportunity i;

[0165] P PRACH，target，f，c is the PRACH target received power provided by higher layers for the activated UL BWP b of carrier f in cell c;

[0166] PL b，f，c is the path loss of the activated UL BWP b based on carrier f of the DL RS associated with the PRACH transmission on the activated DL BWP of cell c, and is calculated by the UE as Reference Signal Power (in dB) – (Reference Signal Receiving Power) RSRP (in dBm) filtered by higher layers, where RSRP and higher layer filter configuration are defined in the protocol. If the activated DL BWP is the initial DL BWP and the SS / PBCH block and CORESET multiplexing mode is 2 or 3, or for a non-serving cell, the UE determines the PL b，f，c .

[0167] Third, when using 2-step RACH, the process of setting the random access preamble transmit power at the MAC layer is as follows:

[0168] For each random access preamble, the MAC entity shall perform the following operations:

[0169] 1. If the value of the preamble transmission counter (PREAMBLE_TRANSMISSION_COUNTER) is greater than 1;

[0170] 2. If a notification to suspend the power boost counter has not been received from the lower layer;

[0171] 3. If no LBT failure indication is received from lower layers for the last random access preamble transmission; and

[0172] 4. If the selected SSB or CSI-RS has not changed from the selection in the last random access preamble transmission:

[0173] Then, the value of the preamble power boost counter (PREAMBLE_POWER_RAMPING_COUNTER) is increased by 1.

[0174] 5. Select the value of DELTA_PREAMBLE;

[0175] 6. Set the preamble target receive power to msgA-PreambleReceivedTargetPower + DELTA_PREAMBLE + (the value of the preamble power boost counter – 1) × the preamble power boost step size.

[0176] Subband Full Duplex (SBFD) is a new duplexing standard that achieves full duplexing at the base station by dividing a single time division duplexing (TDD) carrier into non-overlapping uplink and downlink subbands, transmitting and receiving data separately on these subbands.

[0177] In subband full-duplex (SBFD) mode, an SBFD subband consists of one or multiple contiguous resource blocks, used to transmit data in the same link direction (downlink or uplink). An SBFD symbol refers to the symbol of the subband containing SBFD operation. In Rel-18 research, a TDD carrier can use at most one uplink subband for SBFD operation within an SBFD symbol. This uplink subband can be located on one side of the carrier or in the middle of the carrier in the frequency domain. The network configures the time and frequency domain resources for the SBFD subband.

[0178] Figure 1b shows an example of sub-band full duplex (SBFD), where "D" represents downlink and "U" represents uplink. SBFD symbols are allocated in the second, third, and fourth time slots, which contain the uplink subband.

[0179] When using subband full-duplex, data transmitted in the uplink subband (UL SBFD subband) within SBFD symbols may be subject to various interferences. For example, downlink transmissions from the same gNB may interfere with the reception of the uplink subband, and downlink transmissions from adjacent gNBs (of the same operator or different operators) may also interfere with the reception of the uplink subband.

[0180] Although some interference mitigation techniques exist, they cannot be completely eliminated. In particular, when gNBs that do not support subband full-duplex (e.g., gNBs from another operator) do not employ interference mitigation techniques, their downlink transmissions can cause significant interference to the uplink subbands within SBFD symbols. Therefore, uplink transmissions within SBFD symbols experience greater interference than uplink transmissions within non-SBFD symbols. Transmitting the random access preamble on uplink subbands within SBFD symbols is subject to greater interference, resulting in a lower probability of successful detection by the base station. This requires more random access preamble transmissions, resulting in longer random access times.

[0181] The solution provided by the embodiments of the present disclosure provides a method for controlling the transmit power of a random access preamble transmitted on an uplink subband in full-duplex mode. This method allows a UE to transmit a random access preamble using a higher transmit power on an uplink subband in full-duplex mode, thereby completing random access more quickly.

[0182] The method provided in the embodiments of the present disclosure is applicable to both contention-based random access (CBRA) and non-contention-free random access (CFRA).

[0183] The method provided by the embodiment of the present disclosure is applicable to both 4-step random access (4-step RACH) and 2-step random access (2-step RACH).

[0184] Based on the above wireless communication system, various embodiments of the communication method proposed in the present disclosure are described in detail below.

[0185] FIG2 is an interactive diagram of a method for random access according to an embodiment of the present disclosure. As shown in FIG2 , the method for random access is used in a communication system 100, and the method includes:

[0186] S201. The network device 102 sends a first message to the terminal 101.

[0187] In some embodiments, the terminal receives a first message sent by the network device.

[0188] In some embodiments, the first message carries information related to Subband Full Duplex (SBFD) configured by the network device.

[0189] In some embodiments, the information related to SBFD includes a power offset related to SBFD, or a power boost step size related to SBFD.

[0190] In some embodiments, the first message further carries at least one of a first threshold and a second threshold configured by the network device.

[0191] In some embodiments, at least one of the first threshold and the second threshold is used by the terminal to determine whether to transmit the random access preamble in an uplink subband of SBFD.

[0192] In some embodiments, the network device sends the first message to the terminal by broadcasting.

[0193] In some embodiments, the first message is a system message.

[0194] In some embodiments, the network device sends the system message to the terminal by broadcasting.

[0195] In some embodiments, the system message carries information related to SBFD.

[0196] In some embodiments, the system message also carries at least one of the first threshold and the second threshold.

[0197] In some embodiments, the first message is dedicated Radio Resource Control (RRC) signaling.

[0198] In some embodiments, dedicated RRC signaling carries information related to SBFD.

[0199] In some embodiments, the dedicated RRC signaling also carries at least one of the first threshold and the second threshold.

[0200] In some embodiments, the names of information, etc. are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", and "data" can be used interchangeably.

[0201] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0202] S202: The terminal 101 determines to transmit a random access preamble in an uplink subband of SBFD based on the first message.

[0203] In some embodiments, the terminal may determine to transmit the random access preamble in the uplink subband of SBFD based on at least one of the first threshold and the second threshold in the first message.

[0204] In some embodiments, determining to transmit the random access preamble in an uplink subband of SBFD includes: each time a time domain resource used for transmitting the random access preamble satisfies a first condition, determining to transmit the random access preamble in an uplink subband of SBFD.

[0205] Optionally, if the time domain resources used for transmitting the random access preamble each time meet the first condition, it may be determined that the random access preamble is transmitted in the uplink subband of SBFD.

[0206] In some embodiments, the time domain resources may include time units.

[0207] In some embodiments, the time unit may include but is not limited to "frame", "radio frame", "subframe", "slot", "sub-slot", "mini-slot", "symbol", "symbol", etc.

[0208] In some embodiments, the first condition may include any of the following:

[0209] The time domain resources used for transmitting the random access preamble include at least one time domain resource related to SBFD;

[0210] The number of time domain resources related to SBFD included in the time domain resources used to transmit the random access preamble is greater than a first threshold;

[0211] The proportion of time domain resources related to SBFD included in the time domain resources used to transmit the random access preamble is greater than the second threshold.

[0212] In some embodiments, if the number of time domain resources related to SBFD included in the time domain resources used to transmit the random access preamble is greater than a first threshold, it may be determined that the random access preamble is transmitted in an uplink subband of SBFD.

[0213] Optionally, if the number of SBFD symbols included in the symbols used to transmit the random access preamble at a certain time is greater than a first threshold, it may be determined that the random access preamble is transmitted in the uplink subband of SBFD at that time.

[0214] For example, if the number of SBFD symbols included in the symbols used to transmit the random access preamble is greater than 2, it can be determined that the random access preamble is transmitted in the uplink subband of SBFD. It should be understood that the first threshold can also have other values ​​and is not limited to 2.

[0215] In some embodiments, if the proportion of time domain resources related to SBFD included in the time domain resources used for transmitting the random access preamble is greater than a second threshold, it can be determined that the random access preamble is transmitted in the uplink subband of SBFD.

[0216] Optionally, if the proportion of SBFD symbols included in the symbols used to transmit the random access preamble is greater than a second threshold, it may be determined that the random access preamble is transmitted in an uplink subband of SBFD.

[0217] For example, if the proportion of SBFD symbols included in the symbols used to transmit the random access preamble at a certain time is greater than 50%, it can be determined that the random access preamble is transmitted in the uplink subband of SBFD at that time. It should be understood that the second threshold can also have other values ​​and is not limited to 50%.

[0218] In some embodiments, if the time domain resources used for transmitting the random access preamble at a certain time include at least one time domain resource related to SBFD, it can be determined that the random access preamble is transmitted in the uplink subband of SBFD at that time.

[0219] Optionally, if the symbols used to transmit the random access preamble at a certain time include at least one SBFD symbol, it may be determined that the random access preamble is transmitted in the uplink subband of SBFD at that time.

[0220] For example, if the symbols used to transmit the random access preamble at a certain time include one SBFD symbol, multiple SBFD symbols, or all SBFD symbols, it can be determined that the random access preamble is transmitted in the uplink subband of SBFD at that time. It should be understood that in this embodiment, the value of the first threshold is 1, or the value of the second threshold is 1%, or 100%, or any value between 1% and 100%.

[0221] It should be noted that, in the embodiment of the present disclosure, if it is determined that the symbols of a random access preamble transmitted at a certain time include one or more SBFD symbols, then the transmit power of the random access preamble on all symbols of the random access preamble transmitted at that time is the “first transmit power for transmitting the random access preamble in the uplink subband of SBFD” determined according to step 203.

[0222] In some embodiments, at least one of the first threshold and the second threshold may be pre-configured or obtained from a protocol, which is not limited in this embodiment of the present application. Optionally, in this embodiment, the above step S201 may be omitted.

[0223] S203 : The terminal 101 determines a first transmit power for transmitting a random access preamble in an uplink subband of SBFD.

[0224] In some embodiments, the terminal may determine a first transmit power for transmitting a random access preamble in an uplink subband of SBFD based on information related to SBFD.

[0225] In some embodiments, the terminal may determine a first transmit power for transmitting a random access preamble in an uplink subband of SBFD based on the SBFD-related information carried in the first message.

[0226] In some embodiments, the terminal may determine the first transmit power for transmitting the random access preamble in the uplink subband of SBFD based on information related to SBFD specified in the protocol. Optionally, in this embodiment, the above step S201 may be omitted.

[0227] In some embodiments, if the information related to SBFD includes a power offset related to SBFD, determining a first transmit power for transmitting a random access preamble in an uplink subband of SBFD includes:

[0228] The first transmit power is determined according to the second transmit power for transmitting the random access preamble and the power offset related to the SBFD.

[0229] In some embodiments, the second transmit power includes any of the following:

[0230] The transmit power of the random access preamble set by the Media Access Control (MAC) layer during the 4-step random access process;

[0231] The transmit power of the random access preamble set by the physical layer during the 4-step random access process;

[0232] The transmit power of the random access preamble during the 2-step random access process.

[0233] Optionally, the terminal can determine the transmission power of the random access preamble code transmitted in the uplink subband of SBFD (which can correspond to the first transmission power mentioned above) based on the existing transmission power of the random access preamble code (which can correspond to the second transmission power mentioned above) and the power offset related to SBFD.

[0234] In some embodiments, if a random access preamble is transmitted multiple times in an uplink subband of SBFD, determining the first transmit power based on a second transmit power for transmitting the random access preamble and a power offset associated with SBFD includes:

[0235] The sum of the power offset related to SBFD and the second transmit power is determined as the first transmit power for transmitting the random access preamble code in the uplink subband of SBFD at that time.

[0236] Optionally, if the operation of transmitting the random access preamble code in the uplink subband of SBFD is to be performed multiple times, for each transmission, the sum of the power offset related to SBFD and the second transmission power can be determined as the first transmission power of the random access preamble code transmitted in the uplink subband of SBFD that time.

[0237] In some embodiments, the power offset associated with SBFD does not vary with the number of times the random access preamble is transmitted in the uplink subband of SBFD.

[0238] Optionally, if the operation of transmitting the random access preamble in the uplink subband of SBFD is to be performed multiple times, the power offset related to SBFD remains unchanged when determining the first transmit power for each transmission.

[0239] For example, assume that the number of random access preamble transmissions in an uplink subband of SBFD is N, where N is an integer greater than or equal to 1. Therefore, the first transmit power of the random access preamble transmission in the uplink subband of SBFD = the second transmit power + the power offset associated with SBFD. If N is 1, the transmit power of the first random access preamble transmission in the uplink subband of SBFD can be determined. If N is 2, the transmit power of the second random access preamble transmission in the uplink subband of SBFD can be determined. Similarly, the transmit power of each random access preamble transmission in the uplink subband of SBFD is the sum of the power offset associated with SBFD and the second transmit power. Since the value of the second transmit power varies with the number of random access preamble transmissions (PREAMBLE_POWER_RAMPING_COUNTER - 1), this method can increase the transmit power of the random access preamble transmission in the uplink subband of SBFD, so that the network side can receive the random access preamble.

[0240] In some embodiments, the power offset associated with SBFD may be specified by a protocol, may be pre-configured, or may be configured on the network side.

[0241] In some embodiments, the power offset associated with SBFD is proportional to the number of times the random access preamble is transmitted in the uplink subband of SBFD.

[0242] Optionally, if the operation of transmitting the random access preamble code in the uplink subband of SBFD is to be performed multiple times, then for each transmission, when determining the first transmit power, the power offset related to SBFD is proportional to the number of times the random access preamble code is transmitted in the uplink subband of SBFD.

[0243] For example, assume that the number of times the random access preamble is transmitted in the uplink subband of SBFD is N, where N is an integer greater than or equal to 1. Then, the first transmit power of the random access preamble transmitted in the uplink subband of SBFD = the second transmit power + N * the power offset related to SBFD, where N starts at 1. If N is 1, the transmit power of the random access preamble for the first transmission in the uplink subband of SBFD can be determined; if N is 2, the transmit power of the random access preamble for the second transmission in the uplink subband of SBFD can be determined, and so on, gradually increasing the transmit power of the random access preamble for transmission in the uplink subband of SBFD until the random access preamble is received on the network side.

[0244] In some embodiments, the information related to SBFD includes a power boost step size related to SBFD, and determining a first transmit power for transmitting a random access preamble in an uplink subband of SBFD includes:

[0245] The first transmit power is determined according to the second transmit power for transmitting the random access preamble, the power boost step size related to SBFD, and the number of times the random access preamble is transmitted in the uplink subband of SBFD.

[0246] In some embodiments, the second transmit power includes any of the following:

[0247] The transmit power of the random access preamble set by the MAC layer during the 4-step random access process;

[0248] The transmit power of the random access preamble during the 2-step random access process.

[0249] In some embodiments, the number of times the random access preamble is transmitted in the uplink subband of the SBFD may be determined based on the value of a power boost counter associated with the SBFD.

[0250] Optionally, the terminal may determine the transmission power of the random access preamble code transmitted in the uplink subband of SBFD (which may correspond to the first transmission power mentioned above) based on the existing transmission power of the random access preamble code (which may correspond to the second transmission power mentioned above), the power boost step related to SBFD, and the number of times the random access preamble code is transmitted in the uplink subband of SBFD.

[0251] In some embodiments, if a random access preamble is transmitted multiple times in an uplink subband of SBFD, determining the first transmit power based on a second transmit power for transmitting the random access preamble, a power boost step size associated with SBFD, and the number of times the random access preamble is transmitted in the uplink subband of SBFD includes:

[0252] The product of the power boost step size related to SBFD and the number of times the random access preamble code is transmitted in the uplink subband of SBFD, and the sum of the second transmit power are determined as the first transmit power of the random access preamble code transmitted in the uplink subband of SBFD at that time.

[0253] Optionally, if the operation of transmitting the random access preamble code in the uplink subband of SBFD is to be performed multiple times, for each transmission, the product of the power boost step related to SBFD and the number of times the random access preamble code is transmitted in the uplink subband of SBFD, and the sum of the second transmission power can be determined as the first transmission power of the random access preamble code transmitted in the uplink subband of SBFD at that time.

[0254] In some embodiments, the power boost step size associated with SBFD may be specified by a protocol, may be pre-configured, or may be configured on the network side.

[0255] For example, assume that the number of times a random access preamble is transmitted in the uplink subband of SBFD is N, where N is an integer greater than or equal to 1. Then, the first transmit power of the random access preamble transmitted in the uplink subband of SBFD = the second transmit power + N * the power boost step size associated with SBFD, where N starts at 1. If N is 1, the transmit power of the first random access preamble transmission in the uplink subband of SBFD can be determined; if N is 2, the transmit power of the second random access preamble transmission in the uplink subband of SBFD can be determined, and so on, gradually increasing the transmit power of the random access preamble transmitted in the uplink subband of SBFD until the random access preamble is received on the network side.

[0256] In some embodiments, the number of times the random access preamble is transmitted on the uplink subband of SBFD may be determined based on the value of a power boost counter associated with SBFD. Each time the random access preamble is transmitted on the uplink subband of SBFD, the value of the power boost counter associated with SBFD is incremented by 1.

[0257] In some embodiments, the number of times the random access preamble is transmitted in the uplink subband of SBFD is one more than the number of times the power is boosted for transmitting the random access preamble in the uplink subband of SBFD.

[0258] In some embodiments, terms such as "certain", "preset", "preset", "setting", "indicated", "a certain", "any", and "first" can be interchangeable. "Specific A", "preset A", "preset A", "setting A", "indicated A", "a certain A", "any A", and "first A" can be interpreted as A pre-specified in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., or as specific A, a certain A, any A, or first A, etc., but not limited to this.

[0259] In some embodiments, terms such as "in the case of", "at the time of", "when", "if", and "if" can be used interchangeably.

[0260] S204. The terminal 101 transmits a random access preamble in an uplink subband of SBFD based on the first transmit power.

[0261] In some embodiments, the terminal may send a random access preamble to the network device 102 on an uplink subband of SBFD based on the determined first transmit power.

[0262] The method involved in the embodiments of the present disclosure may include at least one of steps S201 to S204. For example, step S203 may be implemented as an independent embodiment, steps S203 and S204 may be implemented as independent embodiments, and steps S202, S203, and S204 may be implemented as independent embodiments, but are not limited thereto.

[0263] In some embodiments, step S201 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0264] In some embodiments, step S202 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0265] FIG3a is a flow chart of a method for random access according to an embodiment of the present disclosure. As shown in FIG3a , the method for random access may be executed by terminal 101, and the method includes:

[0266] S301: Obtain a first message.

[0267] The optional implementation of step S301 can refer to the optional implementation of step S201 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0268] In some embodiments, the terminal 101 may receive a first message sent by the network device 102, such as a message carried by a dedicated RRC signaling or a system message broadcast by the network device, but is not limited thereto and may also receive a first message sent by other entities.

[0269] In some embodiments, the first message carries at least one of the first threshold and the second threshold.

[0270] S302: Based on the first message, determine to transmit a random access preamble in an uplink subband of SBFD.

[0271] The optional implementation of step S302 can refer to the optional implementation of step S202 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0272] In some embodiments, the random access preamble is determined to be transmitted in an uplink subband of SBFD based on at least one of a first threshold and a second threshold in the first message.

[0273] In some embodiments, at least one of the first threshold and the second threshold may also be specified or preset based on a protocol.

[0274] S303: Determine a first transmit power for transmitting a random access preamble in an uplink subband of SBFD.

[0275] In some embodiments, based on information related to SBFD, a first transmit power for transmitting a random access preamble in an uplink subband of SBFD is determined.

[0276] In some embodiments, the information related to SBFD includes: a power offset related to SBFD, or a power boost step size related to SBFD.

[0277] In some embodiments, the information related to SBFD may be carried in the first message, or may be specified or preset by a protocol.

[0278] The optional implementation of step S303 can refer to the optional implementation of step S203 in FIG. 2 and other related parts in the embodiment involved in FIG. 2 , which will not be described in detail here.

[0279] S304: Transmit a random access preamble in an uplink subband of SBFD according to the first transmit power.

[0280] The optional implementation of step S304 can refer to the optional implementation of step S204 in FIG. 2 and other related parts in the embodiment involved in FIG. 2 , which will not be described in detail here.

[0281] The method involved in the embodiments of the present disclosure may include at least one of steps S301 to S304. For example, step S303 may be implemented as an independent embodiment, steps S303 and S304 may be implemented as independent embodiments, and steps S302, S303, and S304 may be implemented as independent embodiments, but are not limited thereto.

[0282] In some embodiments, step S301 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0283] In some embodiments, step S302 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0284] FIG3b is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3b , the communication method can be executed by the terminal 101, and the method includes:

[0285] S311. Obtain a first message.

[0286] The optional implementation of step S311 can refer to the optional implementation of step S201 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0287] In some embodiments, the terminal 101 may receive a first message sent by the network device 102, such as a message carried by a dedicated RRC signaling or a system message broadcast by the network device, but is not limited thereto and may also receive a first message sent by other entities.

[0288] In some embodiments, the first message carries information related to SBFD.

[0289] In some embodiments, the information related to SBFD includes: a power offset related to SBFD, or a power boost step size related to SBFD.

[0290] S312: Determine, based on the first message, a first transmit power for transmitting a random access preamble in an uplink subband of SBFD.

[0291] In some embodiments, based on the SBFD-related information carried in the first message, a first transmit power for transmitting the random access preamble in the uplink subband of the SBFD is determined.

[0292] In some embodiments, the information related to SBFD may also be specified by a protocol or preset.

[0293] In some embodiments, the first transmit power for transmitting the random access preamble in the uplink subband of the SBFD is determined based on protocol provisions or preset information related to the SBFD.

[0294] The optional implementation of step S312 can refer to the optional implementation of step S203 in FIG2 and other related parts in the embodiment involved in FIG2 , which will not be described in detail here.

[0295] S313: Transmit a random access preamble in an uplink subband of SBFD according to the first transmit power.

[0296] The optional implementation of step S313 can refer to the optional implementation of step S204 in FIG2 and other related parts in the embodiment involved in FIG2 , which will not be described in detail here.

[0297] The method involved in the embodiment of the present disclosure may include at least one of steps S311 to S313. For example, step S312 may be implemented as an independent embodiment, and steps S312 and S313 may be implemented as independent embodiments, but are not limited thereto.

[0298] In some embodiments, step S311 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0299] FIG3c is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3c, the communication method can be executed by the terminal 101, and the method includes:

[0300] S321 : Determine, according to information related to SBFD, a first transmit power for transmitting a random access preamble in an uplink subband of SBFD.

[0301] Optional implementations of step S321 may refer to the optional implementations of step S203 in FIG. 2 , step S303 in FIG. 3 a , step S312 in FIG. 3 b , and other related parts in the embodiments involved in FIG. 2 and FIG. 3 a - 3 b , which will not be described in detail here.

[0302] In some embodiments, information related to SBFD is specified by a protocol or configured by a network device.

[0303] In some embodiments, information related to SBFD is configured by the network device through at least one of the following:

[0304] System messages;

[0305] Dedicated Radio Resource Control (RRC) signaling.

[0306] In some embodiments, the information related to the SBFD includes a power offset related to the SBFD.

[0307] In some embodiments, determining a first transmit power for transmitting a random access preamble in an uplink subband of SBFD includes:

[0308] determining a first transmit power according to a second transmit power for transmitting a random access preamble and a power offset associated with SBFD;

[0309] The second transmit power includes any one of the following:

[0310] The transmit power of the random access preamble set by the media access control (MAC) layer during the 4-step random access process;

[0311] The transmit power of the random access preamble set by the physical layer during the 4-step random access process;

[0312] The transmit power of the random access preamble during the 2-step random access process.

[0313] In some embodiments, if a random access preamble is transmitted multiple times in an uplink subband of SBFD, determining the first transmit power based on a second transmit power for transmitting the random access preamble and a power offset associated with SBFD includes:

[0314] Determine the sum of the second transmit power and the power offset related to SBFD as the first transmit power for transmitting the random access preamble code in the uplink subband of SBFD at that time;

[0315] wherein the power offset associated with SBFD does not vary with the number of times the random access preamble is transmitted in the uplink subband of SBFD; or,

[0316] The power offset associated with SBFD is proportional to the number of times the random access preamble is transmitted in the uplink subband of SBFD.

[0317] In some embodiments, the information related to the SBFD includes a power boost step size related to the SBFD.

[0318] In some embodiments, determining a first transmit power for transmitting a random access preamble in an uplink subband of SBFD includes:

[0319] determining the first transmit power according to the second transmit power for transmitting the random access preamble, a power boost step size associated with SBFD, and the number of times the random access preamble is transmitted in an uplink subband of SBFD;

[0320] The second transmit power includes any one of the following:

[0321] The transmit power of the random access preamble set by the MAC layer during the 4-step random access process;

[0322] The transmit power of the random access preamble during the 2-step random access process.

[0323] In some embodiments, if a random access preamble is transmitted multiple times in an uplink subband of SBFD, determining the first transmit power based on a second transmit power for transmitting the random access preamble, a power boost step size associated with SBFD, and the number of times the random access preamble is transmitted in the uplink subband of SBFD includes:

[0324] The product of the power boost step size related to SBFD and the number of times the random access preamble code is transmitted in the uplink subband of SBFD, and the sum of the second transmit power are determined as the first transmit power of the random access preamble code transmitted in the uplink subband of SBFD at that time.

[0325] S322: Transmit a random access preamble in an uplink subband of SBFD according to the first transmit power.

[0326] Optional implementations of step S322 may refer to the optional implementations of step S204 in FIG. 2 , step S304 in FIG. 3 a , step S313 in FIG. 3 b , and other related parts in the embodiments involved in FIG. 2 and FIG. 3 a - 3 b , which will not be described in detail here.

[0327] In some embodiments, before step S321 , the method may further include: determining to transmit a random access preamble in the uplink subband of the SBFD.

[0328] In some embodiments, determining to transmit a random access preamble in an uplink subband of SBFD includes:

[0329] The time domain resource used for transmitting the random access preamble satisfies the first condition, and the random access preamble is determined to be transmitted in the uplink subband of the SBFD;

[0330] The first condition includes any of the following:

[0331] The time domain resources used for transmitting the random access preamble include at least one time domain resource related to SBFD;

[0332] The number of time domain resources related to SBFD included in the time domain resources used to transmit the random access preamble is greater than a first threshold;

[0333] The proportion of time domain resources related to SBFD included in the time domain resources used to transmit the random access preamble is greater than the second threshold.

[0334] In some embodiments, at least one of the first threshold and the second threshold is specified by a protocol; or,

[0335] At least one of the first threshold and the second threshold is configured by the network device.

[0336] The optional implementation of the above optional embodiment can refer to the optional implementation of step S202 in Figure 2, step S302 in Figure 3a, step S312 in Figure 3b, and other related parts in the embodiments involved in Figure 2 and Figures 3a-3b, which will not be repeated here.

[0337] In some embodiments, before step S321, the following steps may also be included:

[0338] S320 (not shown in the figure): obtain the first message.

[0339] Optional implementations of step S320 may refer to the optional implementations of step S201 in FIG. 2 , step S301 in FIG. 3 a , step S311 in FIG. 3 b , and other related parts in the embodiments involved in FIG. 2 and FIG. 3 a - 3 b , which will not be described in detail here.

[0340] In some embodiments, before step S322, the following steps may also be included:

[0341] S323 (not shown in the figure): Based on the first message, determine to transmit a random access preamble in the uplink subband of SBFD.

[0342] Optional implementations of step S322 may refer to the optional implementations of step S202 in FIG. 2 , step S302 in FIG. 3 a , step S312 in FIG. 3 b , and other related parts in the embodiments involved in FIG. 2 and FIG. 3 a - 3 b , which will not be described in detail here.

[0343] FIG4a is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4a , the method according to the embodiment of the present disclosure is executed by the network device 102, and the method includes:

[0344] S401: Send a first message to a terminal.

[0345] The optional implementation of step S401 can refer to the optional implementation of step S201 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0346] In some embodiments, the network device 102 may send the first message to the terminal 101, for example, by carrying the message via dedicated RRC signaling or by broadcasting a system message.

[0347] In some embodiments, the first message carries information related to SBFD.

[0348] In some embodiments, the information related to SBFD is used by the terminal to determine a first transmit power for transmitting a random access preamble in an uplink subband of SBFD.

[0349] In some embodiments, the information related to SBFD includes: a power offset related to SBFD, or a power boost step size related to SBFD.

[0350] In some embodiments, the first message also carries at least one of a first threshold and a second threshold.

[0351] In some embodiments, at least one of the first threshold and the second threshold is used by the terminal to determine whether to transmit the random access preamble in an uplink subband of SBFD.

[0352] S402: Receive a random access preamble transmitted by the terminal in the uplink subband of SBFD.

[0353] In some embodiments, the network side may receive a random access preamble code transmitted by the terminal in the uplink subband of SBFD.

[0354] In some embodiments, the first transmit power of the random access preamble is determined by the terminal based on information related to SBFD.

[0355] The optional implementation of step S402 can refer to the optional implementation of step S204 in FIG. 2 and other related parts in the embodiment involved in FIG. 2 , which will not be described in detail here.

[0356] The method involved in the embodiment of the present disclosure may include at least one of steps S401 and S402. For example, step S402 may be implemented as an independent embodiment, but is not limited thereto.

[0357] In some embodiments, step S401 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0358] FIG4 b is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4 b , the method according to the embodiment of the present disclosure is executed by the network device 102, and the method includes:

[0359] S411: Receive a random access preamble transmitted by a terminal in an uplink subband of SBFD.

[0360] The optional implementation of step S411 can refer to step S204 in FIG. 2 , the optional implementation of step S402 in FIG. 4 a , and other related parts in the embodiments involved in FIG. 2 and FIG. 4 a , which will not be described in detail here.

[0361] In some embodiments, the first transmit power of the random access preamble is determined by the terminal based on information related to SBFD.

[0362] In some embodiments, the information related to SBFD includes: a power offset related to SBFD, or a power boost step size related to SBFD.

[0363] In some embodiments, information related to SBFD is specified by a protocol or configured by a network device.

[0364] In some embodiments, before step 411 , the method may further include: sending a first message to the terminal, where the first message carries information related to SBFD.

[0365] In some embodiments, the first message may further carry: at least one of a first threshold and a second threshold, wherein at least one of the first threshold and the second threshold is used by the terminal to determine whether to transmit a random access preamble in an uplink subband of SBFD.

[0366] In some embodiments, the first message includes at least one of:

[0367] System messages;

[0368] Dedicated Radio Resource Control (RRC) signaling.

[0369] In some embodiments, the network device 102 sends the configured SBFD-related information to the terminal via a message carried in a dedicated RRC signaling or by broadcasting a system message.

[0370] The optional implementation of the above optional embodiment can refer to the optional implementation of step S201 in Figure 2, the optional implementation of step S401 in Figure 4a, and other related parts in the embodiments involved in Figures 2 and 4a, which will not be repeated here.

[0371] FIG5 is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG5 , the method according to the embodiment of the present disclosure is used in a communication system 100, and the method includes:

[0372] S501: The terminal determines, based on information related to SBFD, a first transmit power for transmitting a random access preamble in an uplink subband of SBFD.

[0373] Optional implementations of step S501 may refer to the optional implementations of step S203 in FIG. 2 , step S303 in FIG. 3a , step S312 in FIG. 3b , step S321 in FIG. 3c , and other related parts in the embodiments involved in FIG. 2 and FIG. 3a to 3c , which will not be repeated here.

[0374] S502: The terminal sends a random access preamble to the network device on an uplink subband of SBFD according to a first transmission power.

[0375] For the optional implementation of step S502, please refer to step S204 of Figure 2, step S304 of Figure 3a, step S313 of Figure 3b, step S322 of Figure 3c, step S402 of Figure 4a, and the optional implementation of step S411 of Figure 4b, as well as other related parts in the embodiments involved in Figure 2, Figures 3a to 3c, and Figures 4a to 4b, which will not be repeated here.

[0376] S503: The network device receives a random access preamble code sent by the terminal on the uplink subband of SBFD.

[0377] For the optional implementation of step S503, please refer to step S204 of Figure 2, step S304 of Figure 3a, step S313 of Figure 3b, step S322 of Figure 3c, step S402 of Figure 4a, and the optional implementation of step S411 of Figure 4b, as well as other related parts in the embodiments involved in Figure 2, Figures 3a to 3c, and Figures 4a to 4b, which will not be repeated here.

[0378] In some embodiments, the above method may include the method described in the above embodiments of the communication system side, terminal side, network equipment side, core network equipment side, etc., which will not be repeated here.

[0379] The present disclosure also provides an optional implementation scheme. Optionally, the UE transmits a random access preamble in an uplink sub-band of sub-band full duplex using a transmit power determined according to a power offset specified by a protocol or configured by a network.

[0380] In some embodiments, the transmit power of the random access preamble is controlled by introducing a power offset (POWER_OFFSET_SBFD).

[0381] Optionally, when the random access procedure is initialized, POWER_OFFSET_SBFD is set to 0 dB.

[0382] Optionally, when the UE transmits a random access preamble in an uplink subband in full-duplex mode, there are two options for setting POWER_OFFSET_SBFD:

[0383] Solution 1: Set POWER_OFFSET_SBFD to powerOffsetSBFD (which may correspond to the power offset related to SBFD mentioned above).

[0384] In this solution, no matter how many times the UE transmits the random access preamble in the uplink subband of subband full-duplex during this random access process, the random access preamble is transmitted in the uplink subband of subband full-duplex using the transmit power determined by the power offset powerOffsetSBFD.

[0385] That is, in this solution, the power offset of the random access preamble transmitted by the UE in the uplink subband of subband full duplex does not change with the number of random access preambles transmitted in the uplink subband of SBFD during this random access process.

[0386] Solution 2: Increase POWER_OFFSET_SBFD by the power offset associated with SBFD, that is, POWER_OFFSET_SBFD = POWER_OFFSET_SBFD + the power offset associated with SBFD.

[0387] In this solution, the power offset of the UE transmitting the random access preamble in the uplink subband of the subband full-duplex is proportional to the number of times the random access preamble is transmitted in the uplink subband of the subband full-duplex during this random access process.

[0388] That is, in this solution, the power offset of the UE's random access preamble transmission in the uplink subband of subband full duplex varies with the number of random access preamble transmissions in the uplink subband of SBFD during this random access process, and the two are in direct proportion.

[0389] In some embodiments, in the above two solutions, the power offset associated with SBFD is set as follows:

[0390] (a) The power offset associated with SBFD is specified in the protocol (e.g., 3 dB);

[0391] (b) The power offset associated with SBFD is configured by the network through system information, for example, in the IE (Information Element) RACH-Config Common (Random Access Channel-Config Common) in the System Information Block 1 (SIB1).

[0392] (c) The power offset associated with SBFD is configured by the network through dedicated RRC signaling, for example, by configuring the power offset associated with SBFD in the IE RACH-ConfigDedicated (Random Access Channel-Config Common) of the RRC Reconfiguration message.

[0393] In some embodiments, the 4-step random access procedure (4-step RACH) and the 2-step random access procedure (2-step RACH) may be configured with power offsets related to SBFD respectively, or may share the power offset related to SBFD.

[0394] In some embodiments, when the UE transmits a random access preamble in a 4-step RACH, the target received power of the random access preamble is set to preambleReceivedTargetPower + DELTA_PREAMBLE + (the value of the preamble power boost counter – 1) × preamble power boost step size + 2-step random access power offset + introduced power offset (POWER_OFFSET_SBFD).

[0395] In some embodiments, when the UE transmits the MSG A random access preamble in the 2-step RACH, the target received power setting of the random access preamble is set to msgA-PreambleReceivedTargetPower + DELTA_PREAMBLE + (the value of the preamble power boost counter – 1) × the preamble power boost step size + the introduced power offset.

[0396] In some embodiments, a power offset may also be introduced when the physical layer sets the transmit power.

[0397] Optional, P PRACH,b,f,c (i) = min{P CMAX,f,c (i),P PRACH,target,f,c +PL b,f,c +ROWER_OFFSET_SBFD}[dBm].

[0398] In some embodiments, a SBFD-related power boost counter (PREAMBLE_POWER_RAMPING_COUNTER_SBFD) and a power boost step size (PREAMBLE_POWER_RAMPING_STEP_SBFD) are introduced to control the transmit power of the random access preamble.

[0399] In some embodiments, when the random access procedure is initialized, the power boost counter associated with SBFD is set to 1, and PREAMBLE_POWER_RAMPING_STEP_SBFD is set to preamblePowerRampingStepSBFD (which may correspond to the power boost step associated with SBFD mentioned above).

[0400] In some embodiments, the power boost step size associated with SBFD is set as follows:

[0401] (d) The power boost step size associated with SBFD is specified in the protocol (e.g., 3 dB);

[0402] (e) The power boost step size related to SBFD is configured by the network through system information, for example, the power boost step size related to SBFD is configured in IERACH-ConfigCommon in SIB1.

[0403] (f) The power boost step size associated with SBFD is configured by the network through dedicated RRC signaling, for example, by configuring the power boost step size associated with SBFD in the IE RACH-ConfigDedicated of the RRC reconfiguration message.

[0404] In some embodiments, the 4-step RACH and the 2-step RACH may be configured with power boost step sizes related to SBFD respectively, or may share the power boost step size related to SBFD.

[0405] In some embodiments, when the UE transmits a random access preamble in an uplink subband of subband full duplex, PREAMBLE_POWER_RAMPING_COUNTER_SBFD is increased by 1.

[0406] In some embodiments, when the UE transmits a random access preamble in a 4-step RACH, the preamble target received power is set to preambleReceivedTargetPower + DELTA_PREAMBLE + (the value of the preamble power boost counter – 1) × the preamble power boost step size + 2-step random access power offset + (the value of the power boost counter related to the SBFD introduction – 1) × the power boost step size related to the SBFD.

[0407] In some embodiments, when the UE transmits the MSGA random access preamble in the 2-step RACH, the preamble target received power is set to msgA-PreambleReceivedTargetPower + DELTA_PREAMBLE + (the value of the preamble power boost counter – 1) × the preamble power boost step size + (the value of the power boost counter related to the introduction of SBFD – 1) × the power boost step size related to SBFD.

[0408] In some embodiments, the random access preamble may be transmitted in multiple symbols in the time domain. Therefore, when the symbols transmitted by the random access preamble include both SBFD symbols and non-SBFD symbols, a method is required to determine whether the above-mentioned condition of "UE transmitting the random access preamble in an uplink subband of subband full duplex" is met.

[0409] In optional embodiment 1, when all symbols used to transmit the random access preamble are SBFD symbols, it is considered that the UE transmits the random access preamble in an uplink sub-band of sub-band full duplex.

[0410] In optional embodiment 2, when the symbols transmitting the random access preamble include at least one SBFD symbol, it is considered that the UE transmits the random access preamble in an uplink sub-band of sub-band full-duplex.

[0411] Optional embodiment 3 defines a ratio threshold (which may correspond to the second threshold mentioned above). The threshold may be predefined (eg, 50%), or specified in the protocol, or may be configured by the network.

[0412] In some embodiments, the network may be configured through system information or through dedicated RRC signaling.

[0413] In some embodiments, the threshold may be a general configuration for SBFD or may be configured individually for each SBFD resource.

[0414] In this optional embodiment 3, when the ratio of the number of SBFD symbols included in the symbols for transmitting the random access preamble to the number of all symbols for transmitting the random access preamble is equal to or greater than a threshold, it is considered that the UE transmits the random access preamble in the uplink subband of the subband full-duplex.

[0415] The above optional embodiments 1 and 2 can be considered as special cases of the optional embodiment 3. For example, the above optional embodiment 1 can be considered to predefine a threshold of 100%, while the above optional embodiment 2 can be considered to predefine a very small threshold (for example, 1%).

[0416] In optional embodiment 4, a threshold value for the number of symbols is defined (which may correspond to the first threshold value mentioned above). The threshold value may be predefined (eg, 2) or may be configured by the network.

[0417] In some embodiments, the network may be configured through system information or through dedicated RRC signaling.

[0418] In some embodiments, the threshold may be a general configuration for SBFD or may be configured individually for each SBFD resource.

[0419] In this optional embodiment 4, when the number of SBFD symbols included in the symbols for transmitting the random access preamble is equal to or greater than a threshold, it is considered that the UE transmits the random access preamble in the uplink subband of subband full-duplex.

[0420] The above optional embodiment 2 can be considered as a special case of the optional embodiment 4. For example, the predefined threshold value in the optional embodiment 2 can be considered to be 1.

[0421] The embodiments of the present disclosure further provide an apparatus for implementing any of the above methods. For example, an apparatus is provided, comprising units or modules for implementing each step performed by a terminal in any of the above methods. For another example, another apparatus is provided, comprising units or modules for implementing each step performed by a network device (e.g., an access network device, a core network function node, a core network device, etc.) in any of the above methods.

[0422] It should be understood that the division of the various units or modules in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), and the functions of some or all of the above units or modules are realized by designing the logical relationship of the elements in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be implemented by a programmable logic device (PLD), taking a field programmable gate array (FPGA) as an example, which can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by a configuration file, thereby realizing the functions of some or all of the above units or modules.

[0423] All units or modules of the above devices can be implemented in the form of software called by the processor, or in the form of hardware circuits, or partially implemented in the form of software called by the processor, and the remaining part implemented in the form of hardware circuits. In the embodiment of the present disclosure, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution 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 relationship of the hardware circuit. The logical relationship of the above hardware circuit is fixed or reconfigurable, such as a hardware circuit implemented by a processor as 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 to implement the hardware circuit configuration 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. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0424] FIG6 a is a schematic diagram of the structure of a terminal proposed in an embodiment of the present disclosure. As shown in FIG6 a , the terminal may include at least one of: a first transceiver module 611 , a first processing module 612 , and the like.

[0425] In some embodiments, the first processing module 612 is configured to determine, based on information related to sub-band full-duplex (SBFD), a first transmit power for transmitting a random access preamble in an uplink sub-band of SBFD;

[0426] In some embodiments, the first transceiver module 611 is configured to transmit a random access preamble in an uplink subband of SBFD according to a first transmit power.

[0427] Optionally, the first transceiver module 611 is used to execute steps related to signaling reception and transmission performed by the terminal 101 in any of the above methods, for example, at least one of steps S201 shown in FIG. 2 , which will not be described in detail here.

[0428] Optionally, the first transceiver module 611 is further configured to execute steps related to communication performed by the terminal 101 in any of the above methods, such as step S204 shown in FIG. 2 , which will not be described in detail here.

[0429] Optionally, the first processing module 612 is configured to execute steps related to determining the random access preamble for uplink subband transmission in SBFD, which are executed by the terminal 101 in any of the above methods, for example, step S202 shown in FIG. 2 , which will not be described again here.

[0430] FIG6 b is a schematic diagram of the structure of a network device according to an embodiment of the present disclosure. As shown in FIG6 b , the network device includes at least one of a second transceiver module 621 and a second processing module 622 .

[0431] In some embodiments, the second transceiver module 621 is configured to receive a random access preamble transmitted by a terminal in an uplink subband of subband full-duplex (SBFD), where the first transmit power of the random access preamble is determined by the terminal based on information related to SBFD.

[0432] Optionally, the second transceiver module 621 is used to execute steps related to signaling performed by the network device 102 in any of the above methods, for example, at least one of steps S201 shown in FIG. 2 , which will not be described in detail here.

[0433] Optionally, the second transceiver module 621 is further configured to execute steps related to communication performed by the network device 102 in any of the above methods, such as step S204 shown in FIG. 2 , which will not be described in detail here.

[0434] Figure 7a is a schematic diagram of the structure of a communication device 7100 proposed in an embodiment of the present disclosure. Communication device 7100 can be a network device (e.g., an access network device, a core network device, etc.), a terminal (e.g., a user equipment, etc.), a chip, a chip system, or a processor that supports a network device to implement any of the above methods, or a chip, a chip system, or a processor that supports a terminal to implement any of the above methods. Communication device 7100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0435] As shown in Figure 7a, the communication device 7100 includes one or more processors 7101. The processor 7101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control the communication device (such as a base station, baseband chip, terminal device, terminal device chip, DU or CU, etc.), execute programs, and process program data. The processor 7101 is used to call instructions to enable the communication device 7100 to perform any of the above methods.

[0436] In some embodiments, the communication device 7100 further includes one or more transceivers 7102. When the communication device 7100 includes one or more transceivers 7102, the transceiver 7102 performs at least one of the communication steps such as sending and / or receiving in the above method (for example, at least one of steps S201 and S204 shown in FIG2 , but not limited thereto), and the processor 7101 performs at least one of the other steps (for example, at least one of steps S202 and S203 shown in FIG2 , but not limited thereto). In an optional embodiment, the transceiver may include a receiver and / or a transmitter, and the receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, and interface may be interchangeable, the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be interchangeable, and the terms receiver, receiving unit, receiver, and receiving circuit may be interchangeable.

[0437] In some embodiments, the communication device 7100 further includes one or more memories 7102 for storing instructions. Optionally, all or part of the memories 7102 may be located outside the communication device 7100.

[0438] In some embodiments, the communication device 7100 further includes one or more transceivers 7103. When the communication device 7100 includes one or more transceivers 7103, the communication steps such as sending and receiving in the above method are performed by the transceiver 7103, and the other steps are performed by the processor 7101.

[0439] In some embodiments, a transceiver may include a receiver and a transmitter, which may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, and transceiver circuit may be used interchangeably; the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be used interchangeably; and the terms receiver, receiving unit, receiver, and receiving circuit may be used interchangeably.

[0440] Optionally, the communication device 7100 further includes one or more interface circuits 7104, which are connected to the memory 7102. The interface circuits 7104 may be configured to receive signals from the memory 7102 or other devices, and may be configured to send signals to the memory 7102 or other devices. For example, the interface circuits 7104 may read instructions stored in the memory 7102 and send the instructions to the processor 7101.

[0441] The communication device 7100 described in the above embodiment may be a network device or a terminal, but the scope of the communication device 7100 described in the embodiment of the present disclosure is not limited thereto, and the structure of the communication device 7100 may not be limited by FIG. 7a. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data or programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0442] FIG7 b is a schematic diagram of the structure of a chip 7200 according to an embodiment of the present disclosure. If the communication device 7100 can be a chip or a chip system, reference can be made to the schematic diagram of the structure of the chip 7200 shown in FIG7 b , but the present disclosure is not limited thereto.

[0443] The chip 7200 includes one or more processors 7201. The chip 7200 is configured to execute any of the above methods.

[0444] In some embodiments, chip 7200 further includes one or more interface circuits 7202. Optionally, terms such as interface circuit, interface, and transceiver pins may be used interchangeably. In some embodiments, chip 7200 further includes one or more memories 7203 for storing data. Optionally, all or part of memory 7203 may be located outside chip 7200. Optionally, interface circuit 7202 is connected to memory 7203 and may be used to receive data from memory 7203 or other devices, or may be used to send data to memory 7203 or other devices. For example, interface circuit 7202 may read data stored in memory 7203 and send the data to processor 7201.

[0445] In some embodiments, the interface circuit 7202 performs at least one of the communication steps, such as sending and / or receiving, in the above-described method (e.g., at least one of steps S201 and S204 shown in FIG. 2 , but not limited thereto). The interface circuit 7202 performing the communication steps, such as sending and / or receiving, in the above-described method, for example, means that the interface circuit 7202 performs data exchange between the processor 7201, the chip 7200, the memory 7203, or the transceiver device. In some embodiments, the processor 7201 performs at least one of the other steps (e.g., at least one of steps S202 and S203 shown in FIG. 2 , but not limited thereto).

[0446] The present disclosure also provides a program product, which, when executed by the communication device 7100, enables the communication device 7100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0447] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

[0448] The technical solutions described in the embodiments of the present disclosure can be arbitrarily combined without conflict.

[0449] Other embodiments of the present invention will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention that follow from the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

[0450] It should be understood that the present invention is not limited to the exact construction described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A method for random access, characterized in that, The method is executed by a terminal, and the method includes: Determine a first transmission power for transmitting a random access preamble in an uplink subband of SBFD according to information related to subband full duplex (SBFD); Transmit the random access preamble in the uplink subband of the SBFD according to the first transmission power.

2. The method according to claim 1, wherein The information related to SBFD is specified by a protocol; or The information related to SBFD is configured by a network device.

3. The method according to claim 2, wherein The information related to SBFD is configured by the network device through at least one of the following: System message; Dedicated radio resource control (RRC) signaling.

4. The method according to any one of claims 1 to 3, characterized in that, The information related to SBFD includes a power offset related to SBFD.

5. The method according to claim 4, characterized in that, The determining of the first transmission power for transmitting a random access preamble in the uplink subband of SBFD includes: Determine the first transmission power according to a second transmission power for transmitting the random access preamble and the power offset related to SBFD; Wherein, the second transmission power includes any one of the following: The transmission power of the random access preamble set by the media access control (MAC) layer in a 4-step random access procedure; The transmission power of the random access preamble set by the physical layer in a 4-step random access procedure; The transmission power of the random access preamble in a 2-step random access procedure.

6. The method according to claim 5, characterized in that If the random access preamble is transmitted multiple times in the uplink subband of SBFD, the determining of the first transmission power according to the second transmission power for transmitting the random access preamble and the power offset related to SBFD includes: Determine the sum of the second transmission power and the power offset related to SBFD as the first transmission power for transmitting the random access preamble in the uplink subband of SBFD for the current time; Wherein, the power offset related to SBFD does not change with the number of times of transmitting the random access preamble in the uplink subband of SBFD; or The power offset related to SBFD is proportional to the number of times of transmitting the random access preamble in the uplink subband of SBFD.

7. The method according to any one of claims 1 to 3, characterized in that, The information related to SBFD includes a power boost step related to SBFD.

8. The method according to claim 7, wherein The determining of the first transmission power for transmitting a random access preamble in the uplink subband of SBFD includes: Determine the first transmission power according to the second transmission power for transmitting the random access preamble, the power boost step related to SBFD, and the number of times of transmitting the random access preamble in the uplink subband of SBFD; Wherein, the second transmission power includes any one of the following: The transmission power of the random access preamble set by the MAC layer in a 4-step random access procedure; The transmission power of the random access preamble in a 2-step random access procedure.

9. The method according to claim 8, characterized in that, If the random access preamble is transmitted multiple times in the uplink subband of SBFD, the determining of the first transmission power according to the second transmission power for transmitting the random access preamble, the power boost step related to SBFD, and the number of times of transmitting the random access preamble in the uplink subband of SBFD includes: Determine the sum of the product of the power boost step related to SBFD and the number of times of transmitting the random access preamble in the uplink sub-band of SBFD, and the second transmit power as the first transmit power for transmitting the random access preamble in the uplink sub-band of SBFD for this time.

10. The method according to any one of claims 1-9, characterized in that, The method further includes: Determine to transmit a random access preamble in the uplink sub-band of SBFD.

11. The method according to claim 10, wherein The determining to transmit a random access preamble in the uplink sub-band of SBFD includes: Each time the time-domain resource for transmitting the random access preamble satisfies the first condition, determine to transmit the random access preamble in the uplink sub-band of SBFD; Wherein, the first condition includes any one of the following: The time-domain resource for transmitting the random access preamble includes at least one time-domain resource related to SBFD; The number of time-domain resources related to SBFD included in the time-domain resource for transmitting the random access preamble is greater than the first threshold; The proportion of the time-domain resources related to SBFD included in the time-domain resource for transmitting the random access preamble is greater than the second threshold.

12. The method according to claim 11, wherein, At least one of the first threshold and the second threshold is specified by the protocol; or, At least one of the first threshold and the second threshold is configured by the network device.

13. The method according to claim 12, characterized in that, At least one of the first threshold and the second threshold is configured by the network device through at least one of the following: System message; Dedicated RRC signaling.

14. A method for random access, characterized in that, The method is executed by a network device, and the method includes: Receive the random access preamble transmitted by the terminal in the uplink sub-band of sub-band full duplex (SBFD), and the first transmit power of the random access preamble is determined by the terminal based on the information related to SBFD.

15. The method according to claim 14, wherein The method further includes: Send a first message to the terminal, and the first message carries the information related to SBFD.

16. The method according to claim 14 or 15, wherein, The information related to SBFD includes a power offset related to SBFD; or, The information related to SBFD includes a power boost step related to SBFD.

17. The method according to claim 15, wherein The first message further carries at least one of a first threshold and a second threshold, and at least one of the first threshold and the second threshold is used by the terminal to determine whether to transmit a random access preamble in the uplink sub-band of SBFD.

18. The method according to claim 15 or 17, characterized in that, The first message includes at least one of the following: System message; Dedicated radio resource control (RRC) signaling.

19. A terminal, characterized in that, Includes: A first processing module, configured to determine the first transmit power for transmitting a random access preamble in the uplink sub-band of SBFD according to the information related to sub-band full duplex (SBFD); A first transceiver module, configured to transmit the random access preamble in the uplink sub-band of SBFD according to the first transmit power.

20. A network device, characterized in that, Includes: A second transceiver module, configured to receive the random access preamble transmitted by the terminal in the uplink sub-band of sub-band full duplex (SBFD), and the first transmit power of the random access preamble is determined by the terminal based on the information related to SBFD.

21. A terminal, characterized in that, Includes: One or more processors; Wherein, the terminal is used to execute the method for random access according to any one of claims 1 to 13.

22. A network device, characterized in that, Comprising: One or more processors; Wherein, the network device is used to execute the method for random access according to any one of claims 14 to 18.

23. A communication system, characterized in that, Comprising: A terminal and a network device, wherein the terminal is used to implement the method according to any one of claims 1 to 13, and the network device is used to implement the method according to any one of claims 14 to 18.

24. A computer-readable storage medium having a computer program stored thereon, characterized in that, Executable instructions are stored in the computer-readable storage medium, and the executable instructions are loaded and executed by the processor to implement the method according to any one of claims 1 to 13, or claims 14 to 18.

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