Random access method and device, communication equipment, communication system and storage medium

Abstract

The embodiment of the invention discloses a random access method and device, and the method comprises the steps: receiving at least one piece of first information transmitted by network equipment, and enabling the first information to comprise the configuration information of at least one cell or cell group; when it is determined that a first condition is met, a random access process in a candidate cell corresponding to the first information is initiated, and the random access process corresponds to a first media access control (MAC) entity, so that when the terminal initiates the random access process, the random access process can be associated with a specified MAC entity, and the random access process is associated with the specified MAC entity. Therefore, the step understanding of the random access process initiated by the terminal on the network side and the terminal side is consistent, the conflict of the random access process can be effectively avoided, and the success rate of initiating the random access process in the candidate cell of the LTM is effectively improved.

Description

Random access method and device, communication equipment, communication system, and storage medium

[0001] The present disclosure relates to the field of communication technology, and in particular to a random access method and apparatus, communication equipment, a communication system, and a storage medium.

[0002] In the fifth generation mobile communication system (5G), the network side can provide one or more candidate configurations to the terminal, one of which can include one or more "cell (or cell group)" configurations. The network side can subsequently control the terminal to change among multiple "candidate configurations" through layer 1 (layer 1, L1) or layer 2 (layer 2, L2) signaling (for example, changing the working cell (or cell group) from "cell (or cell group) -1" to "cell (or cell group) -2"). This control signaling can be called "cell change control signaling".

[0003] This process may also be referred to as a layer 1 / layer 2 triggered mobility (L1 / L2-triggered Mobility, LTM) process.

[0004]

[0005] The embodiments of the present disclosure provide a random access method and apparatus, a communication device, a communication system, and a storage medium.

[0006] A first aspect of the present disclosure provides a random access method, which is performed by a terminal and includes:

[0007] Receiving at least one first information sent by a network device, where the first information includes configuration information of at least one cell or cell group;

[0008] Determine that a first condition is met, and initiate a random access process in the candidate cell corresponding to the first information, wherein the random access process corresponds to a first media access control MAC entity.

[0009] A second aspect of the present disclosure provides a random access method, which is performed by a network device and includes:

[0010] Sending at least one first information to a terminal, where the first information includes configuration information of at least one cell or cell group;

[0011] The first information is used by the terminal to determine whether a first condition is met and to initiate a random access process in a candidate cell corresponding to the first information, wherein the random access process corresponds to a first media access control MAC entity.

[0012] A third aspect of the present disclosure provides a random access method, the method comprising:

[0013] The network device sends at least one first information to the terminal, where the first information includes configuration information of at least one cell or cell group;

[0014] The terminal determines that the first condition is met, and initiates a random access process in the candidate cell corresponding to the first information, wherein the random access process corresponds to the first media access control MAC entity.

[0015] A fourth aspect of the present disclosure provides a terminal, wherein the terminal includes:

[0016] A transceiver module, configured to receive at least one first information sent by a network device, wherein the first information includes configuration information of at least one cell or cell group;

[0017] A processing module is used to trigger a random access process of a candidate cell corresponding to the first information when a first condition is met, wherein the random access process corresponds to a first media access control MAC entity.

[0018] A fifth aspect of the present disclosure provides a network device, the network device comprising:

[0019] A transceiver module, configured to send at least one first information to a terminal, wherein the first information includes configuration information of at least one cell or cell group;

[0020] The first information is used by the terminal to trigger a random access process in a candidate cell corresponding to the first information when a first condition is met, wherein the random access process corresponds to a first media access control MAC entity.

[0021] The solution proposed in the embodiment of the present disclosure is to receive at least one first information sent by a network device, wherein the first information includes configuration information of at least one cell or a cell group; and when a first condition is met, initiate a random access process in a candidate cell corresponding to the first information, wherein the random access process has a corresponding relationship with a first media access control MAC entity, so that when the terminal initiates the random access process, the random access process can be associated with the designated MAC entity, so that the network side and the terminal side have a consistent understanding of the steps of the random access process initiated by the terminal, which can effectively avoid conflicts in the random access process and effectively improve the success rate of initiating the random access process in the candidate cell of the LTM.

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the background technology, the drawings required for use in the embodiments of the present disclosure or the background technology will be described below.

[0023] FIG1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present disclosure;

[0024] FIG2A is an interactive schematic diagram of a random access method provided by an embodiment of the present disclosure;

[0025] FIG3A is a schematic diagram of a flow chart of a random access method provided by an embodiment of the present disclosure;

[0026] FIG3B is a schematic diagram of a flow chart of a random access method provided by an embodiment of the present disclosure;

[0027] FIG4A is a schematic diagram of a flow chart of a random access method provided by an embodiment of the present disclosure;

[0028] FIG5 is a schematic diagram of a flow chart of a random access method provided by an embodiment of the present disclosure;

[0029] FIG6A is a schematic diagram of the structure of a terminal provided by an embodiment of the present disclosure;

[0030] FIG6B is a schematic diagram of the structure of a network device provided by an embodiment of the present disclosure;

[0031] FIG7A is a schematic diagram of the structure of a communication device provided by an embodiment of the present disclosure;

[0032] FIG. 7B is a schematic diagram of the structure of a chip provided in an embodiment of the present disclosure.

[0033] The embodiments of the present disclosure provide a random access method and apparatus, a communication device, a communication system, and a storage medium.

[0034] In a first aspect, an embodiment of the present disclosure provides a random access method, which is performed by a terminal and includes:

[0035] Receiving at least one first information sent by a network device, where the first information includes configuration information of at least one cell or cell group;

[0036] Determine that a first condition is met, and initiate a random access process in the candidate cell corresponding to the first information, wherein the random access process corresponds to a first media access control MAC entity.

[0037] In the above embodiment, when the terminal initiates a random access process, it can associate the random access process with the designated MAC entity, so that the network side and the terminal side have a consistent understanding of the steps of the random access process initiated by the terminal, which can effectively avoid conflicts in the random access process and effectively improve the success rate of initiating the random access process in the candidate cell of LTM.

[0038] In combination with some embodiments of the first aspect, in some embodiments, the first MAC entity is any one of the following:

[0039] A MAC entity corresponding to the first cell group;

[0040] A MAC entity corresponding to the first information;

[0041] A MAC entity corresponding to the cell group corresponding to the first information;

[0042] The MAC entity corresponding to the second information, wherein the second information is used to trigger the random access process of the terminal in the candidate cell.

[0043] In the above embodiment, the random access process can be associated with a MAC entity of different types, which enhances the flexibility of the solution and effectively improves the success rate of initiating the random access process in the candidate cell of the LTM.

[0044] In combination with some embodiments of the first aspect, in some embodiments, the first cell group is a main cell group MCG or a secondary cell group SCG.

[0045] In the above embodiment, the random access process can be associated with the primary cell group MAC entity or the secondary cell group MAC entity, which enhances the flexibility of the solution and effectively improves the success rate of initiating the random access process in the candidate cell of LTM.

[0046] In combination with some embodiments of the first aspect, in some embodiments, each first information in the at least one first information corresponds to a different MAC entity; or,

[0047] The MAC entity corresponding to each first information in the at least one first information is the same; or,

[0048] The at least one first information is included in at least one first set, and each of the first sets corresponds to a different MAC entity.

[0049] In the above embodiment, the first information may correspond to the same or different MAC entities, thereby enhancing the flexibility of the solution and effectively improving the success rate of initiating a random access process in a candidate cell of the LTM.

[0050] In combination with some embodiments of the first aspect, in some embodiments, the first MAC entity corresponds to multiple random access processes, and the multiple random access processes are all random access processes in candidate cells.

[0051] In the above embodiment, one MAC entity can be allowed to be associated with multiple random access processes in candidate cells, which effectively improves the success rate of initiating random access processes in candidate cells of LTM.

[0052] In combination with some embodiments of the first aspect, in some embodiments, the method further includes: determining a maximum number of the multiple random access processes supported by the terminal.

[0053] In the above embodiment, the number of random access procedures initiated simultaneously in the candidate cells can be limited, resources can be saved, and the success rate of random access procedures initiated in the candidate cells of the LTM can be effectively improved.

[0054] In combination with some embodiments of the first aspect, in some embodiments, the first MAC entity corresponds to multiple random access procedures, and the multiple random access procedures include a random access procedure in a serving cell and a random access procedure in a candidate cell, and the method further includes:

[0055] terminating the random access procedure in the serving cell; or,

[0056] The random access procedure in the candidate cell is terminated.

[0057] In the above embodiment, a MAC entity is allowed to be associated with one type of random access process, which may be multiple random access processes in candidate cells or a random access process in a serving cell, thereby effectively improving the success rate of initiating a random access process in a candidate cell of LTM.

[0058] In combination with some embodiments of the first aspect, in some embodiments, the at least one cell or cell group corresponding to the configuration information included in the first information includes the candidate cell.

[0059] In the above embodiment, the configuration information of the candidate cell is included in the first information and sent to the terminal, which can effectively save signaling and improve the success rate of initiating a random access process in the candidate cell of LTM.

[0060] In combination with some embodiments of the first aspect, in some embodiments, the random access process is a random access process before the serving cell of the terminal is changed to the candidate cell.

[0061] In the above embodiment, the random access process is a random access process before the terminal completes the cell change, which improves the success rate of initiating the random access process in the candidate cell of the LTM.

[0062] In conjunction with some embodiments of the first aspect, in some embodiments, the first condition includes any one or more of the following:

[0063] receiving second information sent by the network device, where the second information is used to trigger the random access process of the terminal in the candidate cell;

[0064] The measurement value of the candidate cell is greater than or equal to a first threshold value;

[0065] The measurement value of the current serving cell of the terminal is less than or equal to the second threshold value.

[0066] In the above embodiment, when the above first condition is met, the terminal initiates a random access process in the candidate cell, so that the network side and the terminal side have a consistent understanding of the steps of the random access process initiated by the terminal, which can enhance the universality of the solution.

[0067] In combination with some embodiments of the first aspect, in some embodiments, the second information includes at least one of a random access preamble identifier and an identifier of the first information.

[0068] In the above embodiment, the network side can flexibly select signaling to trigger the random access process of the terminal, which enhances the flexibility of the solution and improves the success rate of initiating the random access process in the candidate cell of the LTM.

[0069] In combination with some embodiments of the first aspect, in some embodiments, the first condition is receiving second information sent by the network device, and the method further includes:

[0070] Determine resource information corresponding to the uplink signal sent by the terminal during the random access process.

[0071] In the above embodiment, the terminal can determine the resource corresponding to the uplink signal sent during the random access process, which can effectively save signaling and time-frequency domain resources and improve the success rate of initiating the random access process.

[0072] In conjunction with some embodiments of the first aspect, in some embodiments, the resource information includes at least one of the following:

[0073] Information of candidate cells corresponding to the first information;

[0074] Identification of frequency domain resources;

[0075] The type of frequency domain resource.

[0076] In the above embodiment, the resources corresponding to the uplink signal in the random access process can be flexibly determined, which enhances the flexibility of the solution and improves the success rate of initiating the random access process.

[0077] In conjunction with some embodiments of the first aspect, in some embodiments, the information of the candidate cell corresponding to the first information includes at least one of the following:

[0078] The identification of the community;

[0079] The identifier of the cell group;

[0080] an identifier of the first information;

[0081] Cell type identifier.

[0082] In the above embodiment, the candidate cell information corresponding to the first information can be flexibly indicated through a variety of information, thereby saving signaling resources and enhancing the flexibility of the solution.

[0083] In combination with some embodiments of the first aspect, in some embodiments, the method further includes:

[0084] It is determined that the second condition is met, and the random access process is terminated.

[0085] In the above embodiment, the random access process can be terminated when the second condition is met, so that the network side and the terminal side have a consistent understanding of the steps of the random access process initiated by the terminal, thereby enhancing the universality of the solution.

[0086] In conjunction with some embodiments of the first aspect, in some embodiments, the second condition includes any one or more of the following:

[0087] The terminal triggers a new random access process, and the new random access process corresponds to the first MAC entity;

[0088] The terminal triggers a new random access process in the candidate cell, and the new random access process in the candidate cell corresponds to the first MAC entity.

[0089] In the above embodiment, the random access process can be terminated when the above conditions are met, thereby enhancing the universality of the solution and improving the success rate of initiating the random access process.

[0090] In combination with some embodiments of the first aspect, in some embodiments, the method further includes:

[0091] Determining that the network device triggers a retransmission of a random access preamble of the same random access process, and increasing a power ramp count;

[0092] It is determined that the network device triggers the first transmission of a random access preamble of the same random access process, and the power ramp count is determined to be an initial value.

[0093] In the above embodiment, the counter counting rule corresponding to the random access process can be determined, so that the network side and the terminal side have a consistent understanding of the steps of the random access process initiated by the terminal, which can effectively avoid conflicts in the random access process and effectively improve the success rate of initiating the random access process in the candidate cell of LTM.

[0094] In a second aspect, an embodiment of the present disclosure provides a random access method, which is performed by a network device and includes:

[0095] Sending at least one first information to a terminal, where the first information includes configuration information of at least one cell or cell group;

[0096] The first information is used by the terminal to determine whether a first condition is met and to initiate a random access process in a candidate cell corresponding to the first information, wherein the random access process corresponds to a first media access control MAC entity.

[0097] In the above embodiment, when the terminal initiates a random access process, it can associate the random access process with the designated MAC entity, so that the network side and the terminal side have a consistent understanding of the steps of the random access process initiated by the terminal, which can effectively avoid conflicts in the random access process and effectively improve the success rate of initiating the random access process in the candidate cell of LTM.

[0098] In combination with some embodiments of the second aspect, in some embodiments, the first MAC entity is any one of the following:

[0099] A MAC entity corresponding to the first cell group;

[0100] A MAC entity corresponding to the first information;

[0101] A MAC entity corresponding to the cell group corresponding to the first information;

[0102] The MAC entity corresponding to the second information, wherein the second information is used to trigger the random access process of the terminal in the candidate cell.

[0103] In combination with some embodiments of the second aspect, in some embodiments, the first cell group is a main cell group MCG or a secondary cell group SCG.

[0104] In combination with some embodiments of the second aspect, in some embodiments, each first information in the at least one first information corresponds to a different MAC entity; or,

[0105] The MAC entity corresponding to each first information in the at least one first information is the same; or,

[0106] The at least one first information is included in at least one first set, and each of the first sets corresponds to a different MAC entity.

[0107] In combination with some embodiments of the second aspect, in some embodiments, the first MAC entity corresponds to multiple random access processes, and the multiple random access processes are all random access processes in candidate cells.

[0108] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0109] and sending, to the terminal, a maximum number of the plurality of random access processes supported by the terminal.

[0110] In combination with some embodiments of the second aspect, in some embodiments, the first MAC entity corresponds to multiple random access processes, and the multiple random access processes include a random access process in a serving cell and a random access process in a candidate cell, and the random access process in the serving cell is terminated by the terminal; or,

[0111] The random access process in the candidate cell is terminated by the terminal.

[0112] In combination with some embodiments of the second aspect, in some embodiments, the at least one cell or cell group corresponding to the configuration information included in the first information includes the candidate cell.

[0113] In combination with some embodiments of the second aspect, in some embodiments, the random access process is a random access process before the serving cell of the terminal is changed to the candidate cell.

[0114] In conjunction with some embodiments of the second aspect, in some embodiments, the first condition includes any one or more of the following:

[0115] The terminal receives second information sent by the network device, where the second information is used to trigger the random access process of the terminal in the candidate cell;

[0116] The measurement value of the candidate cell is greater than or equal to a first threshold value;

[0117] The measurement value of the current serving cell of the terminal is less than or equal to the second threshold value.

[0118] In combination with some embodiments of the second aspect, in some embodiments, the second information includes at least one of a random access preamble identifier and an identifier of the first information.

[0119] In conjunction with some embodiments of the second aspect, in some embodiments, the first condition is that the terminal receives second information sent by the network device, and the method further includes:

[0120] Sending resource information to the terminal, where the resource information corresponds to an uplink signal sent by the terminal during the random access process.

[0121] In conjunction with some embodiments of the second aspect, in some embodiments, the first condition is that the terminal receives second information sent by the network device, and the method further includes:

[0122] Sending resource information to the terminal, where the resource information corresponds to an uplink signal sent by the terminal during the random access process.

[0123] In conjunction with some embodiments of the second aspect, in some embodiments, the information of the candidate cell corresponding to the first information includes at least one of the following:

[0124] The identification of the community;

[0125] The identifier of the cell group;

[0126] an identifier of the first information;

[0127] Cell type identifier.

[0128] In a third aspect, an embodiment of the present disclosure provides a random access method, the method comprising:

[0129] The network device sends at least one first information to the terminal, where the first information includes configuration information of at least one cell or cell group;

[0130] The terminal determines that the first condition is met, and initiates a random access process in the candidate cell corresponding to the first information, wherein the random access process corresponds to the first media access control MAC entity.

[0131] In the above embodiment, when the terminal initiates a random access process, it can associate the random access process with the designated MAC entity, so that the network side and the terminal side have a consistent understanding of the steps of the random access process initiated by the terminal, which can effectively avoid conflicts in the random access process and effectively improve the success rate of initiating the random access process in the candidate cell of LTM.

[0132] In combination with some embodiments of the third aspect, in some embodiments, the first MAC entity is any one of the following:

[0133] A MAC entity corresponding to the first cell group;

[0134] A MAC entity corresponding to the first information;

[0135] A MAC entity corresponding to the cell group corresponding to the first information;

[0136] The MAC entity corresponding to the second information, wherein the second information is used to trigger the random access process of the terminal in the candidate cell.

[0137] In combination with some embodiments of the third aspect, in some embodiments, the first cell group is a main cell group MCG or a secondary cell group SCG.

[0138] In combination with some embodiments of the third aspect, in some embodiments, each first information in the at least one first information corresponds to a different MAC entity; or,

[0139] The MAC entity corresponding to each first information in the at least one first information is the same; or,

[0140] The at least one first information is included in at least one first set, and each of the first sets corresponds to a different MAC entity.

[0141] In combination with some embodiments of the third aspect, in some embodiments, the first MAC entity corresponds to multiple random access processes, and the multiple random access processes are all random access processes in candidate cells.

[0142] In conjunction with some embodiments of the third aspect, in some embodiments, the method further includes:

[0143] The terminal determines a maximum number of the plurality of random access procedures supported by the terminal.

[0144] In combination with some embodiments of the third aspect, in some embodiments, the first MAC entity corresponds to multiple random access procedures, and the multiple random access procedures include a random access procedure in a serving cell and a random access procedure in a candidate cell, and the method further includes:

[0145] The terminal terminates the random access process in the serving cell; or,

[0146] The terminal terminates the random access process in the candidate cell.

[0147] In combination with some embodiments of the third aspect, in some embodiments, the at least one cell or cell group corresponding to the configuration information included in the first information includes the candidate cell.

[0148] In combination with some embodiments of the third aspect, in some embodiments, the random access process is a random access process before the serving cell of the terminal is changed to the candidate cell.

[0149] In conjunction with some embodiments of the third aspect, in some embodiments, the first condition includes any one or more of the following:

[0150] receiving second information sent by the network device, where the second information is used to trigger the random access process of the terminal in the candidate cell;

[0151] The measurement value of the candidate cell is greater than or equal to a first threshold value;

[0152] The measurement value of the current serving cell of the terminal is less than or equal to the second threshold value.

[0153] In combination with some embodiments of the third aspect, in some embodiments, the second information includes at least one of a random access preamble identifier and an identifier of the first information.

[0154] In conjunction with some embodiments of the third aspect, in some embodiments, the first condition is receiving second information sent by the network device, and the method further includes:

[0155] The terminal determines resource information corresponding to an uplink signal sent by the terminal during the random access process.

[0156] In conjunction with some embodiments of the third aspect, in some embodiments, the resource information includes at least one of the following:

[0157] Information of candidate cells corresponding to the first information;

[0158] Identification of frequency domain resources;

[0159] The type of frequency domain resource.

[0160] In conjunction with some embodiments of the third aspect, in some embodiments, the information of the candidate cell corresponding to the first information includes at least one of the following:

[0161] The identification of the community;

[0162] The identifier of the cell group;

[0163] an identifier of the first information;

[0164] Cell type identifier.

[0165] In conjunction with some embodiments of the third aspect, in some embodiments, the method further includes:

[0166] If it is determined that the second condition is met, the terminal terminates the random access process.

[0167] In conjunction with some embodiments of the third aspect, in some embodiments, the second condition includes any one or more of the following:

[0168] The terminal triggers a new random access process, and the new random access process corresponds to the first MAC entity;

[0169] The terminal triggers a new random access process in the candidate cell, and the new random access process in the candidate cell corresponds to the first MAC entity.

[0170] In conjunction with some embodiments of the third aspect, in some embodiments, the method further includes:

[0171] The network device triggers a retransmission of a random access preamble of the same random access process, and the terminal increases a power ramp count;

[0172] The network device triggers the first transmission of a random access preamble of the same random access process, and the terminal determines the power ramp count as an initial value.

[0173] In a fourth aspect, an embodiment of the present disclosure proposes a terminal, which includes at least one of a transceiver module and a processing module; wherein the terminal is used to execute the first aspect and the optional implementation method of the first aspect.

[0174] In a fifth aspect, an embodiment of the present disclosure proposes a network device, which includes at least one of a transceiver module and a processing module; wherein the terminal is used to execute the second aspect and the optional implementation method of the second aspect.

[0175] In a sixth aspect, an embodiment of the present disclosure proposes a terminal, comprising: one or more processors; wherein the terminal is used to execute the first aspect and the optional implementation method of the first aspect.

[0176] In a seventh aspect, an embodiment of the present disclosure proposes a network device, comprising: one or more processors; wherein the network device is used to execute the second aspect and the optional implementation method of the second aspect.

[0177] In an eighth aspect, an embodiment of the present disclosure proposes a communication system, which includes: a terminal and a network device; wherein the terminal is configured to execute the method described in the first aspect and the optional implementation of the first aspect, and the network device is configured to execute the method described in the second aspect and the optional implementation of the second aspect.

[0178] In the ninth 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 first aspect and the optional implementation method of the first aspect, the second aspect and the optional implementation method of the second aspect.

[0179] In a tenth 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 first aspect and the optional implementation of the first aspect, the second aspect and the optional implementation of the second aspect.

[0180] In an eleventh 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 first aspect and the optional implementation of the first aspect, the second aspect and the optional implementation of the second aspect.

[0181] In a twelfth aspect, an embodiment of the present disclosure provides a chip or a chip system. The chip or chip system includes a processing circuit configured to execute the method described in accordance with the first aspect and the optional implementation of the first aspect, the second aspect and the optional implementation of the second aspect.

[0182] It is understandable that the above-mentioned terminals, network devices, communication systems, storage media, program products, computer programs, chips or chip systems are all used to execute the methods proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding methods, which will not be repeated here.

[0183] The embodiments of the present disclosure provide a random access method and apparatus, a communication device, a communication system, and a storage medium. In some embodiments, the terms such as random access method, random access method, and communication method can be replaced with each other, the terms such as random access apparatus, random access apparatus, and communication apparatus can be replaced with each other, and the terms such as random access system and communication system can be replaced with each other.

[0184] The embodiments of the present disclosure are not exhaustive, but are only illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection 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 of the steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0185] In each embodiment of the present disclosure, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between the embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form a new embodiment based on their internal logical relationships.

[0186] 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 present disclosure.

[0187] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular form, such as "a", "an", "the", "above", "said", "aforementioned", "this", 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 after the article may be understood as a singular expression or a plural expression.

[0188] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0189] In some embodiments, the terms “at least one,” “one or more,” “a plurality of,” “multiple,” etc. may be used interchangeably.

[0190] In some embodiments, "at least one of A and B", "A and / or B", "A in one case, B in another case", "in response to one case A, in response to another case B", etc., may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, A and B (both A and B are executed). When there are more branches such as A, B, C, etc., the above is also similar.

[0191] In some embodiments, the recording method of "A or B" may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). When there are more branches such as A, B, C, etc., the above is also similar.

[0192] 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 restrictions on the position, order, priority, quantity or content of the description objects. The statement of the description object refers to the description in the context of the claims or embodiments, and should not constitute unnecessary restrictions 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", and the "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 the "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes may be the same or different. For example, if the description object is "device", then the "first device" and the "second device" may be the same device or different devices, and their types may be the same or different. For another example, if the description object is "information", then the "first information" and the "second information" may be the same information or different information, and their contents may be the same or different.

[0193] 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.

[0194] In some embodiments, the terms "in response to ," "in response to determining ," "in the case of ," "at ," "when ," "if ," "if ," and the like may be used interchangeably.

[0195] 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 lower 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", "no more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0196] In some embodiments, devices and equipment may be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. In some cases, they may also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject", etc.

[0197] In some embodiments, "network" can be interpreted as devices included in the network, such as access network equipment, core network equipment, etc.

[0198] In some embodiments, "access network device (AN device)" may also be referred to as "radio access network device (RAN device)", "base station (BS)", "radio base station (radio base station)", "fixed station (fixed station)", and in some embodiments may also be understood as "node (node)", "access point (access point)", "transmission point (TP)", "reception point (reception point, RP)", "transmission and / or reception point (transmission / reception point, TRP)" "panel (panel)", "antenna panel (antenna panel)", "antenna array (antenna array)" "cell (cell)", "macro cell (macro cell)", "small cell (small cell)", "femto cell (femto cell)", "pico cell (pico cell)", "sector (sector)", "cell group (cell group)", "serving cell (serving cell)", "carrier (carrier)", "component carrier (component carrier)", "bandwidth part (bandwidth part, BWP)" and the like.

[0199] In some embodiments, "terminal" or "terminal device" can be referred to as "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.

[0200] In some embodiments, acquisition of data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0201] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0202] In addition, each element, each row, or each column in the table of the embodiments of the present disclosure may be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns may also be implemented as an independent embodiment.

[0203] FIG1A is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure.

[0204] As shown in FIG. 1A , a communication system 100 includes a terminal 101 and a network device 102 .

[0205] 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 (Pad), 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 to these.

[0206] In some embodiments, the network device 102 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 Wi-Fi system, but is not limited thereto.

[0207] In some embodiments, the technical solution of the present disclosure may be applicable to the Open RAN architecture. In this case, the interfaces between or within the access 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.

[0208] In some embodiments, the network device may be composed of a centralized unit (central unit, CU) and a distributed unit (distributed unit, DU), wherein the CU may also be referred to as a control unit (control unit). The CU-DU structure may be used to split the protocol layer of the access network device, with some functions of the protocol layer being centrally controlled by the CU, and the remaining part or all of the functions of the protocol layer being distributed in the DU, and the DU being centrally controlled by the CU, but not limited to this.

[0209] 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. A person of ordinary skill in the art 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.

[0210] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG. 1A or part of the subject, but are not limited thereto. The subjects shown in FIG. 1A are examples, and the communication system may include all or part of the subjects in FIG. 1A, or may include other subjects other than FIG. 1A, and the number and form of the subjects are arbitrary, and the subjects may be physical or virtual, and the connection relationship between the subjects is an example, and the subjects may be connected or disconnected, and the connection may be in any manner, and may be a direct connection or an indirect connection, and may be a wired connection or a wireless connection.

[0211] 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) network, Device-to-Device (D2D) system, Machine-to-Machine (M2M) system, Internet of Things (IoT) system, Vehicle-to-Everything (V2X), systems using other communication methods, and next-generation systems based on them. In addition, multiple systems can also be combined (for example, a combination of LTE or LTE-A and 5G, etc.) for application.

[0212] In some embodiments, such as in a 5G system, the network side may provide one or more candidate configurations to the terminal 101, one of which may include one or more "cell (or cell group)" configurations. The network side may subsequently control the terminal to make changes in multiple "candidate configurations" through layer 1 (layer 1, L1) or layer 2 (layer 2, L2) signaling (e.g., changing the working cell (or cell group) from "cell (or cell group) -1" to "cell (or cell group) -2"). This control signaling may be referred to as "cell change control signaling".

[0213] Optionally, the L1 signaling may be, for example, downlink control information (Downlink Control Information, DCI), and the L2 signaling may be, for example, a medium access control layer control element (MAC CE, (MAC, Medium Access Control, media access control layer) (CE, Control Element, control element)), and the like.

[0214] This process may also be referred to as a layer 1 / layer 2 triggered mobility (L1 / L2-triggered Mobility, LTM) process.

[0215] In some embodiments, the LTM process and the Early RACH (RACH, Random Access Channel, random access) process can be as shown in Figure 1B. Before the network actually triggers the terminal to change the cell, the serving cell can instruct the terminal to initiate a random access process in the candidate cell through instructions, thereby obtaining the terminal's uplink transmission timing advance (Timing Advance, TA) in the candidate cell.

[0216] Optionally, for example, the terminal initiates a random access process in the candidate cell through an order DCI of a physical downlink control channel (PDCCH), and the terminal sends a preamble sequence to the candidate cell to trigger the random access process. Then the serving cell can instruct the terminal to switch to the candidate cell through a cell switch command, and after the cell switch, the terminal completes uplink transmission (UL transmission) in the candidate cell.

[0217] In some embodiments, in the 5G system, due to the use of a dual connectivity (DC) architecture, two cell groups are included:

[0218] Master Cell Group (MCG) and Secondary Cell Group (SCG).

[0219] Among them, the network side node in the primary cell group is a master node (Master Node, MN); the network side node in the secondary cell group is a secondary node (Secondary Node, SN).

[0220] The MCG includes a primary cell (PCell) and one or more secondary cells (SCell). The SCG includes a primary secondary cell (PSCell) and one or more SCells. The PCell and PSCell can be collectively referred to as SpCell (Special Cell).

[0221] In some embodiments, when the terminal is configured with DC, the MCG and SCG of the terminal correspond to different MAC entities.

[0222] Among them, the MAC entity refers to the entity responsible for scheduling and managing wireless resources in the wireless communication system. It can be used to schedule and manage wireless resources, control the access process and transmission process, and support quality of service QoS management, etc., to ensure that the wireless communication system can transmit data efficiently and reliably. For example, the MAC entity can encapsulate and decapsulate data on multiple transmission channels, as well as schedule and manage data to ensure the correct transmission and processing of data between the physical layer and the logical link control layer, such as:

[0223] Broadcast Channel (BCH);

[0224] Downlink Shared Channel(s), DL-SCH;

[0225] Paging Channel (PCH);

[0226] Uplink Shared Channel(s), UL-SCH;

[0227] Random Access Channel(s), RACH, etc.

[0228] In some embodiments, the terminal 101 can trigger a random access process, and the triggered random access process includes: a 2-step random access process and a 4-step random access process.

[0229] The two-step random access process includes: the terminal sends MsgA (Message A, random access message A); the network feeds back MsgB (Message B, random access message B). The terminal matches MsgB with MsgA to determine whether the contention is resolved.

[0230] The 4-step random access process includes: the terminal sends Msg1 (Message 1, the first random access message); the network feeds back Msg2 (Message 2, the second random access message); the terminal sends Msg3 (Message 3, the third random access message) according to the uplink grant (UL grant) of Msg2; the network feeds back Msg4 (Message 4, the fourth random access message). The terminal matches Msg3 and Msg4 to determine whether the contention is resolved.

[0231] Optionally, the terminal can have only one ongoing random access procedure in each MAC entity. If multiple RACH procedures are triggered in one MAC entity of the terminal, it is up to the terminal implementation to retain which RACH procedure.

[0232] In some embodiments, the terminal 101 may trigger a mobility process based on a "preconfigured condition" of the network and a "preconfigured cell (or cell group)" corresponding to the condition. When the terminal 101 meets the "preconfigured condition" (e.g., a specific measurement event), the terminal changes the serving cell (or cell group) to the "preconfigured cell (or cell group)". The "mobility process triggered based on the condition" includes any one or more of the following:

[0233] Conditional Handover (CHO);

[0234] Conditional PSCell Addition (CPA);

[0235] Conditional PSCell Change (CPC) change.

[0236] The terminal may also change the configuration of a specific cell (or cell group) according to the network instruction after satisfying the "pre-configured conditions". (For example, changing the PCell configuration of the terminal from "candidate cell (or cell group) configuration-1" to "candidate cell (or cell group) configuration-2").

[0237] In summary, when the network side triggers the terminal to initiate a random access process in the candidate cell of LTM, how to manage the random access process (for example, how to manage the corresponding counters and timers; how to associate the MAC entity corresponding to the RACH process, etc.) is a problem that needs to be solved.

[0238] The random access method and device provided by the present disclosure are described in detail below with reference to the accompanying drawings.

[0239] FIG2A is an interactive schematic diagram of a random access method according to an embodiment of the present disclosure. As shown in FIG2A , the embodiment of the present disclosure relates to a random access method, and the method includes:

[0240] Step S2101, the network device 102 sends first information to the terminal 101.

[0241] In some embodiments, the terminal 101 receives first information sent by the network device 102 .

[0242] In some embodiments, the number of the above-mentioned first information is at least one.

[0243] In some embodiments, the first information includes configuration information of at least one cell or cell group.

[0244] In some embodiments, the first information is used by terminal 101 to trigger a random access process.

[0245] In some embodiments, the above-mentioned first information corresponds to at least one candidate cell or cell group, wherein the above-mentioned at least one candidate cell or cell group is included in the above-mentioned at least one cell or cell group, and the configuration information of the above-mentioned at least one cell or cell group is included in the above-mentioned first information.

[0246] In some embodiments, the first information is used by the terminal to trigger a random access process in the candidate cell corresponding to the first information when a first condition is met.

[0247] Optionally, the first condition may be that a control signaling sent by a network device is received, or that a measurement value acquired by the terminal satisfies a preset condition.

[0248] In some embodiments, the name of the first information is not limited, and it may be, for example, "random access configuration", "candidate configuration", "candidate cell configuration", "candidate cell group configuration", etc.

[0249] In some embodiments, the MAC entity corresponding to each first information in the at least one first information is different.

[0250] In some embodiments, the MAC entity corresponding to each first information in the at least one first information mentioned above is the same.

[0251] In some embodiments, the at least one first information is included in at least one first set, and each first set corresponds to a different MAC entity.

[0252] As an example, the network device provides four first information to the terminal, first information-1, first information-2, first information-3 and first information-4, wherein the first information-1 and the first information-2 belong to the first set-1, the first information-2 and the first information-4 belong to the first set-2, and the first set-1 corresponds to MAC entity-1, and the first set-2 corresponds to MAC entity-2.

[0253] Step S2102: Terminal 101 initiates a random access process.

[0254] In some embodiments, when the first condition is met, the terminal 101 initiates a random access process.

[0255] In some embodiments, terminal 101 triggers a random access process in the candidate cell corresponding to the first information.

[0256] Optionally, the candidate cell corresponding to the first information is configured by a network device or agreed upon by a protocol.

[0257] Optionally, the candidate cell corresponding to the first information is included in at least one cell or cell group, wherein the first information includes configuration information of the at least one cell or cell group.

[0258] Optionally, the candidate cell corresponding to the first information is one of the at least one cell or cell group corresponding to the configuration information included in the first information.

[0259] Optionally, the information used to indicate the candidate cell corresponding to the first information includes at least one of the following:

[0260] The identification of the community;

[0261] The identifier of the cell group;

[0262] an identifier of the first information;

[0263] Cell type identifier.

[0264] Among them, optionally, the cell identifier can be at least one of the following: a serving cell identifier (such as a serving cell index (serving cell index)), an SCell identifier, a physical cell identifier (such as a physical cell identifier (Physical Cell Identifier, PCI)), etc.); a frequency domain resource identifier of the cell (such as an absolute radio frequency channel number (Absolute Radio Frequency Channel Number, ARFCN), etc.).

[0265] Optionally, the cell group identifier may be an MCG identifier or an SCG identifier.

[0266] Optionally, the cell type includes any one of the following: PCell; SCell; PSCell; SPCell.

[0267] In some embodiments, the random access process corresponds to the first MAC entity.

[0268] Optionally, the correspondence between the random access process and the first MAC entity may be configured by a network device or agreed upon by a protocol.

[0269] Optionally, the first MAC entity may be any one of the following:

[0270] A MAC entity corresponding to the first cell group;

[0271] A MAC entity corresponding to the first information;

[0272] A MAC entity corresponding to the cell group corresponding to the first information;

[0273] The MAC entity corresponding to the second information, wherein the second information is used to trigger the random access process of the terminal 101 in the candidate cell.

[0274] In some embodiments, there is a corresponding relationship between the random access process and the MAC entity corresponding to the first cell group.

[0275] Optionally, the first cell group is a main cell group MCG or the first cell group is a secondary cell group SCG.

[0276] Optionally, the random access procedures initiated by the terminal 101 in the candidate cell corresponding to the first information are all associated with the MAC entity corresponding to the MCG.

[0277] Optionally, the random access process initiated by the terminal 101 in the candidate cell corresponding to the first information is associated with the MAC entity corresponding to the SCG.

[0278] Optionally, when the candidate cell for the terminal 101 to initiate a random access process is a cell of an MCG, the first MAC entity is a MAC entity corresponding to the MCG. When the candidate cell for the terminal 101 to initiate a random access process is a cell of an SCG, the first MAC entity is a MAC entity corresponding to the SCG.

[0279] In some embodiments, there is a corresponding relationship between the random access process and the MAC entity corresponding to the first information.

[0280] Optionally, in some embodiments, the MAC entity corresponding to the first information is configured or indicated by a network device, or the MAC entity corresponding to the first information is agreed upon by a protocol.

[0281] In some embodiments, the MAC entity corresponding to each first information in the at least one first information is different.

[0282] As an example, the network device 102 provides two first information, first information-1 and first information-2, to the terminal 101, wherein the first information-1 corresponds to the MAC entity-1, and the first information-2 corresponds to the MAC entity-2. When the terminal 101 initiates a random access process based on the first information-1, the MAC entity corresponding to the random access process is the MAC entity corresponding to the first information-2, i.e., the MAC entity-2.

[0283] In some embodiments, the MAC entity corresponding to each first information in the at least one first information mentioned above is the same.

[0284] As an example, the network device 102 provides two first information, first information-1 and first information-2, to the terminal 101, wherein the first information-1 and the first information-2 both correspond to the MAC entity-1. When the terminal 101 initiates a random access process based on the first information-2, the MAC entity corresponding to the random access process is the MAC entity corresponding to the first information-1, i.e., the MAC entity-1.

[0285] In some embodiments, the at least one first information is included in at least one first set, and each first set corresponds to a different MAC entity.

[0286] As an example, the network device 102 provides the terminal 101 with four first information, first information-1, first information-2, first information-3 and first information-4, wherein the first information-1 and the first information-2 belong to the first set-1, the first information-2 and the first information-4 belong to the first set-2, and the first set-1 corresponds to MAC entity-1, and the first set-2 corresponds to MAC entity-2. When the terminal 101 initiates a random access process based on the first information-1 included in the first set-1, the MAC entity corresponding to the random access process is the MAC entity corresponding to the first set-1, i.e., MAC entity-1.

[0287] In some embodiments, there is a corresponding relationship between the random access process and the MAC entity corresponding to the cell group corresponding to the first information.

[0288] Optionally, the cell group corresponding to the first information may be a main cell group MCG or a secondary cell group SCG.

[0289] As an example, the network device 102 provides two first information to the terminal 101, the first information-1 and the first information-2, the first information-1 is used for MCG change (corresponding to the MCG MAC entity), and the first information-2 is used for SCG change (corresponding to the SCG MAC entity). In the case where the terminal 101 initiates a random access process based on the first information-1, that is, the terminal 101 initiates a random access process in the candidate cell corresponding to the first information-1 corresponding to the MCG, the MAC entity corresponding to the random access process is the MAC entity corresponding to the cell group corresponding to the first information-1, that is, the MCG MAC entity.

[0290] In some embodiments, there is a corresponding relationship between the random access process and the MAC entity corresponding to the second information, wherein the second information is used to trigger the random access process of the terminal 101 in the candidate cell.

[0291] Optionally, the second information may be, for example, PDCCH-order, such as DCI, or other signaling such as MAC CE, Radio Resource Control (RRC), etc., which may trigger the terminal 101 to initiate a random access process.

[0292] Optionally, the second information may be high-layer signaling and / or physical-layer signaling, etc.

[0293] As an example, the network device 102 provides two first information, first information-1 and first information-2, to the terminal 101. When the terminal 101 receives a PDCCH-order in the MCG (for example, the PDCCH-order is received in the PCell of the MCG; for another example, the PDCCH-order can also be received in an SCell of the MCG) to trigger the terminal 101 to initiate a random access process in the candidate cell corresponding to the first information-1, the MAC entity corresponding to the random access process is the MAC entity corresponding to the PDCCH-order that triggers the random access process, that is, the MCG MAC entity.

[0294] As another example, the network device provides the terminal with two first information, first information-1 and first information-2. When the terminal 101 receives a PDCCH-order in the SCG (for example, the PDCCH-order is received in the PSCell of the SCG; for another example, the PDCCH-order can also be received in an SCell of the SCG) to trigger the terminal 101 to initiate a random access process in the candidate cell corresponding to the first information-1, the MAC entity corresponding to the random access process is the MAC entity corresponding to the PDCCH-order that triggers the random access process, that is, the SCG MAC entity.

[0295] In some embodiments, when the first condition is met, the terminal 101 initiates a random access process.

[0296] Optionally, the first condition includes any one or more of the following:

[0297] receiving second information sent by the network device 102, where the second information is used to trigger a random access process of the terminal 101 in the candidate cell;

[0298] The measurement value of the candidate cell is greater than or equal to the first threshold value;

[0299] The measurement value of the current serving cell of terminal 101 is less than or equal to the second threshold value.

[0300] In some embodiments, the terminal 101 receives the second information sent by the network device 102, and based on the triggering of the second information, the terminal 101 initiates a random access process in the candidate cell corresponding to the first information.

[0301] Optionally, the second information may be upper layer(s) signaling (such as RRC message) and / or physical layer signaling (such as DCI), etc.

[0302] Optionally, the second information includes at least one of a random access preamble identifier and an identifier of the first information.

[0303] Optionally, the random access preamble identifier may be, for example, a "preamble index", the identifier of the first information may be, for example, a "candidate configuration index", and the like.

[0304] Further, in some embodiments, after the terminal 101 receives the second information sent by the network device 102, the terminal 101 can determine the resource information corresponding to the uplink signal for sending the above-mentioned random access process.

[0305] Optionally, the uplink signal may be, for example, any one or more of Msg1, Msg3, and MsgA.

[0306] Optionally, the terminal 101 may determine the above resource information based on the configuration of the network device 102 or based on the agreement of the protocol.

[0307] Optionally, the resource information includes at least one of the following:

[0308] Information of the candidate cell corresponding to the first information;

[0309] Identification of frequency domain resources;

[0310] The type of frequency domain resource.

[0311] Optionally, the information of the candidate cell corresponding to the first information includes at least one of the following:

[0312] The identification of the community;

[0313] The identifier of the cell group;

[0314] an identifier of the first information;

[0315] Cell type identifier.

[0316] Among them, optionally, the cell identifier can be at least one of the following: a serving cell identifier (such as a serving cell index, etc.); an SCell identifier; a physical cell identifier (such as a physical cell identifier PCI, etc.); a frequency domain resource identifier of the cell (such as an absolute radio frequency channel number ARFCN, etc.).

[0317] Optionally, the cell group identifier may be an MCG identifier or an SCG identifier.

[0318] Optionally, the cell type includes any one of the following: PCell; SCell; PSCell; SPCell.

[0319] Optionally, the identifier of the frequency domain resource may be, for example, a partial bandwidth (Bandwidth Part, BWP) identifier, or an identifier of a frequency domain resource of other granularity, which is not limited in the embodiments of the present disclosure.

[0320] Optionally, the type of the frequency domain resource may be, for example, a BWP type, or a type of frequency domain resource of other granularity, which is not limited in the embodiments of the present disclosure.

[0321] Optionally, the type of BWP includes at least one of the following: an initial BWP; a first active BWP.

[0322] In some embodiments, the terminal 101 determines that the measurement value of the candidate cell corresponding to the first information is greater than or equal to the first threshold value, and the terminal 101 triggers a random access process in the candidate cell.

[0323] Optionally, the measurement value can be used to measure the signal quality of the candidate cell.

[0324] Optionally, the measurement value may be, for example, a reference signal received power (RSRP), a reference signal received quality (RSRQ), a received signal strength indication (RSSI), a signal to interference plus noise ratio (SINR), etc., which is not limited in the embodiments of the present disclosure.

[0325] Optionally, the first threshold value may be configured by a network device or agreed upon by a protocol.

[0326] As an example, the terminal 101 determines that the RSRP measurement value of the PCell corresponding to the first information is greater than or equal to the first threshold value, and the terminal 101 initiates a random access process in the PCell.

[0327] In some embodiments, terminal 101 determines that the measurement value of the current serving cell is less than or equal to the second threshold value, and terminal 101 triggers a random access process of the candidate cell corresponding to the first information.

[0328] Optionally, the measurement value can be used to measure the signal quality of the serving cell.

[0329] Optionally, the measurement value may be, for example, a reference signal received strength RSRP, a reference signal received quality RSRQ, a received signal strength indication RSSI, a signal to interference plus noise ratio SINR, etc., which is not limited in the embodiments of the present disclosure.

[0330] Optionally, the first threshold value may be configured by a network device or agreed upon by a protocol.

[0331] As an example, the terminal 101 determines that the RSRP measurement value of the current PCell or PSCell of the terminal is less than or equal to the second threshold value, and the terminal 101 initiates a random access process in the candidate cell corresponding to the first information.

[0332] In some embodiments, when the first MAC entity corresponds to multiple random access processes, and the multiple random access processes are all random access processes in candidate cells, the terminal 101 allows multiple random access processes to be performed simultaneously.

[0333] Optionally, the terminal 101 may determine the maximum number of multiple random access processes supported based on its own implementation, or based on the configuration of the network device, or based on the agreement of the protocol.

[0334] In some embodiments, the number of the multiple "random access processes in the candidate cell" performed simultaneously may also be configured by the network device or agreed upon by the protocol, and the number does not exceed the maximum allowed number reported by the terminal.

[0335] In some embodiments, when the first MAC entity corresponds to multiple random access processes, and the multiple random access processes include a random access process in a serving cell and a random access process in a candidate cell, the terminal 101 terminates the random access process in the serving cell (or is called the random access process retained in the candidate cell); or, the terminal 101 terminates the random access process in the candidate cell (or is called the random access process retained in the serving cell).

[0336] Optionally, whether the terminal 101 terminates (or retains) the random access process in the serving cell or terminates (or retains) the random access process in the candidate cell may be configured by the network device or agreed upon by the protocol.

[0337] As an example, terminal 101 triggers multiple random access procedures on the MCG MAC entity, including random access procedure-1 in candidate cell-1, random access procedure-2 in candidate cell-2, and random access procedure-3 in serving cell-1. If terminal 101 determines to retain other types of random access procedures except "random access procedure in candidate cell" (i.e., retain "random access procedure in serving cell") based on the configuration of network equipment or based on the agreement of protocol. Then terminal 101 retains random access procedure-3 in serving cell-1, and terminates random access procedure-1 of candidate cell-1 and random access procedure-2 of candidate cell-2. If terminal 101 determines to retain other types of random access procedures except "random access procedure in serving cell" (i.e., retain "random access procedure in candidate cell") based on the configuration of network equipment or based on the agreement of protocol. Then terminal 101 retains random access procedure-1 in candidate cell-1 and random access procedure-2 in candidate cell-2, and terminates random access procedure-3 in serving cell-1.

[0338] In some embodiments, the random access process in the above-mentioned embodiments is a random access process initiated on the candidate cell before the serving cell of the terminal 101 is changed to the candidate cell.

[0339] Step S2103: Terminal 101 terminates the random access process.

[0340] In some embodiments, when the second condition is met, the terminal 101 terminates the random access procedure.

[0341] Optionally, the second condition includes any one or more of the following:

[0342] The terminal 101 triggers a new random access process, and the new random access process corresponds to the first MAC entity;

[0343] Terminal 101 triggers a new random access process in the candidate cell, and the new random access process in the candidate cell corresponds to the first MAC entity.

[0344] As an example, network device 102 triggers terminal 101 to initiate a random access process in candidate cell-1 through PDCCH-order, and the random access process corresponds to the MCG MAC entity. Afterwards, network device 102 triggers terminal 101 to initiate a random access process in candidate cell-2 through PDCCH-order, and the random access process corresponds to the MCG MAC entity. Then terminal 101 terminates the "random access process in candidate cell-1".

[0345] As another example, the network device 102 triggers the terminal 101 to initiate the first transmission of the random access preamble of the random access process in the candidate cell-1 through the PDCCH-order, and the random access process corresponds to the MCG MAC entity. Afterwards, the network device 102 triggers the terminal 101 to initiate the first transmission of the random access preamble of the random access process in the candidate cell-1 through the PDCCH-order again, and the random access process corresponds to the MCG MAC entity. Then the terminal 101 terminates the previous "random access process in the candidate cell-1".

[0346] In some embodiments, the network device 102 triggers a retransmission of a random access preamble of the same random access procedure and increases the power ramp count.

[0347] Optionally, the maximum value of the power ramp count is limited to be less than or equal to a threshold value configured by the network or agreed upon by the protocol.

[0348] Optionally, increasing the power ramp count is to add 1 to the value of the power ramp counter.

[0349] In some embodiments, the network device 102 triggers the first transmission of a random access preamble of the same random access process and determines the power ramp count as an initial value.

[0350] Optionally, the initial value may be 1.

[0351] Optionally, determining the power climb count as an initial value refers to resetting the value of the power climb counter to an initial value, for example, the initial value is "1".

[0352] In some embodiments, the names of information, etc. are not limited to the names recorded in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "code element", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0353] In some embodiments, the names of information, etc. are not limited to the names recorded in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "code element", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0354] In some embodiments, terms such as "physical downlink shared channel (PDSCH)", "DL data" and the like can be interchangeable, and terms such as "physical uplink shared channel (PUSCH)", "UL data" and the like can be interchangeable.

[0355] In some embodiments, the terms "radio", "wireless", "radio access network (RAN)", "access network (AN)", "RAN-based" and the like may be used interchangeably.

[0356] In some embodiments, terms such as "resource block (RB)", "physical resource block (PRB)", "sub-carrier group (SCG)", "resource element group (REG)", "PRB pair", "RB pair", "resource element (RE)", and "sub-carrier" can be used interchangeably.

[0357] In some embodiments, "obtain", "obtain", "get", "receive", "transmit", "bidirectional transmission", "send and / or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from high levels, obtaining by self-processing, autonomous implementation, etc.

[0358] In some embodiments, terms such as "send", "transmit", "report", "send", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0359] In some embodiments, terms such as "certain", "preset", "preset", "set", "indicated", "some", "any", and "first" can be interchangeable, and "specific A", "preset A", "preset A", "set A", "indicated A", "some A", "any A", and "first A" can be interpreted as A pre-defined in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., and can also be interpreted as specific A, some A, any A, or first A, etc., but is not limited to this.

[0360] In some embodiments, the determination or judgment can be performed by a value represented by 1 bit (0 or 1), 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 to this.

[0361] The communication method involved in the embodiments of the present disclosure may include at least one of steps S2101 to S2103. For example, step 2101 may be implemented as an independent embodiment, step 2102 may be implemented as an independent embodiment, step 2103 may be implemented as an independent embodiment, step 2102+2103 may be implemented as an independent embodiment, step 2101+2102 may be implemented as an independent embodiment, step 2101+2102+2103 may be implemented as an independent embodiment, etc., but is not limited thereto.

[0362] In some embodiments, step 2102 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0363] In some embodiments, step 2103 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0364] In some embodiments, reference may be made to other optional implementations recorded before or after the description corresponding to FIG. 2 .

[0365] FIG3A is a flow chart of a random access method according to an embodiment of the present disclosure. As shown in FIG3A , the embodiment of the present disclosure relates to a random access method, which is executed by a terminal 101 and includes:

[0366] Step S3101, receiving the first information sent by the network device 102.

[0367] The optional implementation of step S3101 can refer to the optional implementation of step S2101 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.

[0368] In some embodiments, the terminal 101 receives the first information sent by the network device 102, but is not limited thereto and may also receive the first information sent by other entities.

[0369] In some embodiments, terminal 101 obtains first information specified by a protocol.

[0370] In some embodiments, terminal 101 obtains the first information from an upper layer(s).

[0371] In some embodiments, terminal 101 performs processing to obtain the first information.

[0372] In some embodiments, step S3101 is omitted, and the terminal 101 autonomously implements the function indicated by the first information, or the above function is default or acquiescent.

[0373] Step S3102, initiate a random access process.

[0374] The optional implementation of step S3102 can refer to the optional implementation of step S2102 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.

[0375] Step S3103, terminate the random access process.

[0376] The optional implementation of step S3103 can refer to the optional implementation of step S2103 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.

[0377] The communication method involved in the embodiments of the present disclosure may include at least one of steps S3101 to S3103. For example, step 3101 may be implemented as an independent embodiment, step 3102 may be implemented as an independent embodiment, step 3103 may be implemented as an independent embodiment, step 3102+3103 may be implemented as an independent embodiment, step 3101+3102 may be implemented as an independent embodiment, step 3101+3102+3103 may be implemented as an independent embodiment, etc., but the present invention is not limited thereto.

[0378] In some embodiments, step 3102 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0379] In some embodiments, step 3103 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0380] FIG3B is a flow chart of a random access method according to an embodiment of the present disclosure. As shown in FIG3B , the embodiment of the present disclosure relates to a random access method, which is executed by a terminal 101 and includes:

[0381] Step S3201, receiving the first information sent by the network device 102.

[0382] The optional implementation of step S3201 can refer to step S2101 in Figure 2A, the optional implementation of step S3101 in Figure 3A, and other related parts in the embodiments involved in Figures 2A and 3A, which will not be repeated here.

[0383] Step S3202: initiate a random access process.

[0384] The optional implementation of step S3202 can refer to step S2102 of FIG. 2A , the optional implementation of step S3102 of FIG. 3A , and other related parts in the embodiments involved in FIG. 2A and FIG. 3A , which will not be described in detail here.

[0385] Optionally, in some embodiments, the terminal 101 can terminate the random access process initiated above. The optional implementation method thereof can refer to step S2103 of FIG. 2A , the optional implementation method of step S3103 of FIG. 3A , and other related parts in the embodiments involved in FIG. 2A and FIG. 3A , which will not be described in detail here.

[0386] The communication method involved in the embodiment of the present disclosure may include at least one of step S3201 to step S3202. For example, step 3201 may be implemented as an independent embodiment, step 3202 may be implemented as an independent embodiment, step 3201+3202 may be implemented as an independent embodiment, etc., but is not limited thereto.

[0387] In some embodiments, step 3202 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0388] FIG4A is a flow chart of a random access method according to an embodiment of the present disclosure. As shown in FIG4A , the embodiment of the present disclosure relates to a random access method, which is executed by a network device 102 and includes:

[0389] Step S4101, sending the first information.

[0390] The optional implementation of step S4101 can refer to the optional implementation of step S2101 in FIG. 2A and other related parts of the embodiment involved in FIG. 2A , which will not be described in detail here.

[0391] In some embodiments, the network device 102 sends the first information to the terminal 101, but is not limited thereto and may also send configuration information to other entities.

[0392] Optionally, the first information is used by the terminal 101 to trigger a random access process in the candidate cell corresponding to the first information. The optional implementation method thereof can refer to the optional implementation method of step S2102 of FIG. 2A and other related parts of the embodiment involved in FIG. 2A, which will not be described in detail here.

[0393] Optionally, the random access process may be terminated by the terminal 101. For its optional implementation, please refer to the optional implementation of step S2103 in FIG2A and other related parts in the embodiment involved in FIG2A, which will not be described in detail here.

[0394] FIG5 is a flow chart of a random access method according to an embodiment of the present disclosure. As shown in FIG5 , the method involved in the embodiment of the present disclosure is used in a communication system 100, and the method includes:

[0395] Step S5101, the network device 102 sends at least one first information to the terminal 101.

[0396] Step S5102: When the first condition is met, the terminal 101 triggers a random access process of the candidate cell corresponding to the first information.

[0397] The optional implementation methods of step S5101 and step S5102 can refer to the steps in any embodiment or any multiple embodiments in the embodiments of Figures 2A, 3A-3B, and 4A, and other related parts of the embodiments involved in Figures 2A, 3A-3B, and 4A.

[0398] In some embodiments, the above method may include the method described in the above embodiments of the communication system side, terminal side, network device side, etc., which will not be repeated here.

[0399] The communication method involved in the embodiment of the present disclosure may include at least one of step S5101 to step S5102. For example, step 5101 may be implemented as an independent embodiment, step 5102 may be implemented as an independent embodiment, step 5101+5102 may be implemented as an independent embodiment, etc., but is not limited thereto.

[0400] In some embodiments, step 5102 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0401] In this implementation mode or example, unless there is any contradiction, each step can be independent, arbitrarily combined or exchanged in order, the optional methods or optional examples can be arbitrarily combined, and can be arbitrarily combined with any steps of other implementation modes or other examples.

[0402] The following is an exemplary introduction to the methods described in the above embodiments.

[0403] Embodiments of the present invention:

[0404] Step 1: The network side provides one or more "candidate configurations" to the terminal side (eg, a "candidate configuration" provided by an RRCReconfiguration message, where one "candidate configuration" may include one or more "cell (or cell group) configurations").

[0405] Optionally, the “candidate configuration” may be used for at least one of the following purposes:

[0406] Purpose 1: The network side can subsequently control the terminal to change multiple "candidate cells (or cell groups)" through signaling (such as "dynamic cell (or cell group) change" in the background technology);

[0407] Purpose 2: When the terminal meets the triggering conditions of the network configuration or protocol agreement, the terminal changes the configuration to the candidate cell (or cell group) configuration (for example, when the terminal measurement meets the A3 or A5 event, the service MCG configuration is changed to the candidate MCG configuration. For example, the "mobility process based on conditional triggering" mentioned above).

[0408] Step 2: The terminal triggers a random access process in the candidate cell and associates the random access process with a specific MAC entity.

[0409] Furthermore, the candidate cell is a designated cell corresponding to the candidate configuration, wherein the designated cell information is a network configuration or a protocol agreement.

[0410] Optionally, the “designated cell information” includes at least one of the following:

[0411] 1. Community identification;

[0412] 2. Cell group identifier (e.g., MCG or SCG);

[0413] 3. Candidate configuration identification;

[0414] 4. Cell type identification.

[0415] Optionally, the type of the cell identifier includes at least one of the following:

[0416] Serving cell identifier (eg, serving cell index);

[0417] SCell logo;

[0418] Physical cell identifier (e.g., PCI (Physical Cell Identifier));

[0419] Cell frequency identifier (e.g., ARFCN (Absolute Radio Frequency Channel Number)).

[0420] Optionally, the cell type includes any of the following:

[0421] PCell;

[0422] SCell;

[0423] PSCell;

[0424] SpCell.

[0425] In some embodiments, the MAC entity associated with the random access process may be a network configuration or a protocol agreement.

[0426] Optionally, the type of MAC entity associated with the random access process includes any one of the following:

[0427] Type 1: MAC entity corresponding to a specific cell group.

[0428] The “MAC entity corresponding to a specific cell group” includes any one of the following (for example, the specific cell group may be a protocol agreement or a network configuration):

[0429] MCGMAC entity (e.g., according to the protocol, the random access process initiated by the terminal in the candidate cell is associated with the MCG MAC entity);

[0430] SCG MAC entity.

[0431] Type 2: MAC entity corresponding to the candidate configuration.

[0432] Optionally, the “MAC entity corresponding to the candidate configuration” includes any one of the following:

[0433] Different candidate configurations correspond to different MAC entities (e.g., candidate configuration-1 is MAC entity-1, and candidate configuration-2 is MAC entity-2. The protocol stipulates that when the terminal initiates a random access process in the candidate cell corresponding to candidate configuration-1, the random access process is associated with the MAC entity-1 corresponding to candidate configuration-1);

[0434] All candidate configurations correspond to the same MAC entity (for example, the network side provides the terminal with candidate configuration-1 and candidate configuration-2, and both candidate configuration-1 and candidate configuration-2 correspond to MAC entity-1. The protocol stipulates that when the terminal initiates a random access process in a candidate cell, the random access process is associated with the MAC entity-1 corresponding to the candidate configuration);

[0435] Different candidate configuration sets correspond to different MAC entities (for example, the network side provides the terminal with candidate configuration-1 / candidate configuration-2 / candidate configuration-3 / candidate configuration-4, candidate configuration-1 and candidate configuration-2 belong to candidate configuration set-1 and correspond to MAC entity-1, candidate configuration-3 and candidate configuration-4 belong to candidate configuration set-2 and correspond to MAC entity-2. The protocol stipulates that when the terminal initiates a random access process in the candidate cell corresponding to candidate configuration set-1, the random access process is associated with the MAC entity-1 corresponding to candidate configuration set-1.).

[0436] Type 3: The MAC entity corresponding to the cell group corresponding to the candidate configuration.

[0437] (For example, the network side provides the terminal with candidate configuration-1 and candidate configuration-2, candidate configuration-1 is used for MCG change (corresponding to MCGMAC entity), and candidate configuration-2 is used for SCG change (corresponding to SCGMAC entity). The protocol stipulates that when the terminal initiates a random access process in the candidate cell corresponding to candidate configuration-1 corresponding to MCG, the random access process is associated with the MCGMAC entity corresponding to candidate configuration-1.)

[0438] Type 4: MAC entity corresponding to the random access process triggering signaling.

[0439] (For example, the network side provides the terminal with candidate configuration-1 and candidate configuration-2. The terminal receives PDCCH-order in MCG (for example, receives PDCCH-order in PCell of MCG), which triggers the terminal to initiate a random access process in the candidate cell corresponding to candidate configuration-1. The protocol stipulates that the random access process is associated with the MCG MAC entity corresponding to PDCCH-order.) (For example, the network side provides the terminal with candidate configuration-1 and candidate configuration-2. The terminal receives PDCCH-order in SCG (for example, receives PDCCH-order in PSCell of SCG), which triggers the terminal to initiate a random access process in the candidate cell corresponding to candidate configuration-1. The protocol stipulates that the random access process is associated with the SCG MAC entity corresponding to PDCCH-order.)

[0440] Furthermore, the "random access process" may be limited to a random access process initiated in a candidate cell before the serving cell of the terminal is changed to a candidate cell.

[0441] In some embodiments, the triggering condition of "the candidate cell initiating a random access process" may be any one of the following:

[0442] Trigger condition 1: The network sends an indication signaling trigger.

[0443] Optionally, the "indication signaling" may be an RRC message and / or a physical layer control signaling (eg, DCI).

[0444] Optionally, the content of the "indication signaling" includes at least one of the following:

[0445] Random access preamble identifier (eg, preamble index);

[0446] Candidate configuration identifier (e.g., candidate configuration index).

[0447] Trigger condition 2: The terminal initiates a random access process in the candidate cell when the preset conditions are met.

[0448] Optionally, the “pre-condition” includes at least one of the following:

[0449] Condition 1: The measurement value of the candidate cell is greater than or equal to the threshold value (for example, the measurement value RSRP (Reference Signal Received Power) of the PCell of candidate configuration-1 is greater than or equal to the threshold value);

[0450] Condition 2: The measured value of the serving cell is less than or equal to the threshold value (eg, the measured value RSRP of the PCell or PSCell is less than or equal to the threshold value).

[0451] Among them, for "trigger condition 1", in addition, the uplink resource information sent by the uplink signal corresponding to the random access process (such as Msg1 of the 4-step random access process; MsgA of the 2-step random access process, etc.) can be indicated through protocol agreement or network configuration.

[0452] Optionally, the uplink resource information includes at least one of the following: "designated cell information" (same as above, "designated cell information"); designated BWP information.

[0453] Optionally, the "specified BWP information" includes at least one of the following: BWP identifier; BWP type.

[0454] Optionally, the BWP type includes any one of the following: an initial BWP; a first active BWP.

[0455] Among them, further, the network side configuration or protocol agreement, when the MAC entity corresponding to the "random access process corresponding to the candidate cell" has multiple triggered random access processes at the same time, the terminal processing rules include any of the following:

[0456] Processing rule 1: If the type of multiple triggered random access procedures is "random access procedures corresponding to candidate cells", the terminal allows multiple "random access procedures corresponding to candidate cells" to be performed simultaneously.

[0457] Processing rule 2: If the types of the multiple triggered random access processes include both "random access process corresponding to the candidate cell" and "other random access process types" (e.g., the random access process initiated on the service cell-1), the terminal selects to retain one type of random access process from the "random access process corresponding to the candidate cell" and "other random access process types". The retained random access process type is a network configuration or protocol agreement. (For example, on the MCG MAC of the terminal, the terminal triggers random access process-1 on the candidate cell-1, triggers random access process-2 on the candidate cell-2, and triggers random access process-3 on the service cell-1. The protocol may stipulate that the terminal retains other random access process types except the "random access process corresponding to the candidate cell". Then, the terminal retains the random access process-3 on the service cell-1, and abandons the random access process-1 on the candidate cell-1 and the random access process-2 on the candidate cell-2.)

[0458] Among them, for processing rule 1, further, the number of multiple "random access processes corresponding to candidate cells" that are carried out simultaneously can be agreed upon by network configuration or protocol (for example, the protocol stipulates that the number of multiple "random access processes corresponding to candidate cells" that are carried out simultaneously does not exceed the maximum allowed number reported by the terminal).

[0459] Step 3: When the terminal triggers the random access process of the "random access process corresponding to the candidate cell", the network configuration or protocol stipulates that the end condition of the "random access process corresponding to the candidate cell" is any of the following:

[0460] End condition 1: The MAC entity corresponding to the "random access process corresponding to the candidate cell" triggers a new random access process.

[0461] End condition 2: The MAC entity corresponding to the "random access procedure corresponding to the candidate cell", the terminal triggers a new "random access procedure corresponding to the candidate cell". (For example, the network side triggers the terminal to initiate a random access procedure in candidate cell-1 in MCG MAC through PDCCH-order. Afterwards, the network side triggers the terminal to initiate a random access procedure in candidate cell-2 in MCG MAC through PDCCH-order, and the terminal terminates the "random access procedure of candidate cell-1".) (For example, the network side triggers the terminal to initiate the first transmission of the random access preamble of the random access procedure in candidate cell-1 in MCG MAC through PDCCH-order. Afterwards, the network side triggers the terminal to initiate the first transmission of the random access preamble of the random access procedure in candidate cell-1 in MCG MAC again through PDCCH-order, and the terminal terminates the previous "random access procedure of candidate cell-1".)

[0462] For the same "random access process of a candidate cell", if the network triggers the retransmission of the random access preamble, the terminal increases the power climbing counter by 1. Furthermore, the maximum value of the power climbing counter may be limited to be less than or equal to a threshold value configured by the network or agreed upon by the protocol.

[0463] Among them, for the same "random access process of the candidate cell", if the network side triggers the first transmission of the random access preamble again, the terminal sets the value of the power climbing counter to the initial value (eg, the initial value "1").

[0464] The embodiments of the present disclosure also propose a device for implementing any of the above methods, for example, a device is proposed, the above device includes a unit or module for implementing each step performed by the terminal in any of the above methods. For another example, another device is also proposed, including a unit or module for implementing each step performed by a network device (such as an access network device, a core network function node, a core network device, etc.) in any of the above methods.

[0465] It should be understood that the division of the units or modules in the above device is only a division of logical functions, and in actual implementation, they can be fully or partially integrated into one physical entity, or they can be physically separated. In addition, the units or modules in the device can 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 instructions are stored in the memory. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the 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 inside 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 hardware circuits can be understood as one or more processors; for example, in one implementation, the above 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 components in the circuit; for example, in another implementation, the above hardware circuit can be realized 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, so as to realize the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of a processor calling software, or in the form of a hardware circuit, or in part by a processor calling software, and the rest by a hardware circuit.

[0466] In the disclosed embodiment, the processor is a circuit with signal processing capability. In one implementation, the processor may be a circuit with instruction reading and running capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which may be understood as a microprocessor), or a digital signal processor (DSP), etc.; in another implementation, the processor may realize certain functions through the logical relationship of the hardware circuit, and 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 processor loads a configuration document to implement the process of hardware circuit configuration, which may 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 may also be a hardware circuit designed for artificial intelligence, which may be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0467] FIG6A is a schematic diagram of the structure of a terminal proposed in an embodiment of the present disclosure. As shown in FIG6A, the terminal 6100 may include: at least one of a transceiver module 6101 and a processing module 6102. In some embodiments, the transceiver module is used to receive at least one first information sent by a network device, wherein the first information includes configuration information of at least one cell or cell group; the processing module is used to trigger a random access process of a candidate cell corresponding to the first information when a first condition is met, wherein the random access process corresponds to a first media access control MAC entity.

[0468] Optionally, the transceiver module is used to execute at least one of the communication steps such as sending and / or receiving (such as step S2101, but not limited to this) executed by the terminal 101 in any of the above methods, which will not be repeated here. Optionally, the processing module is used to execute at least one of the other steps (such as step S2102, step S2103, but not limited to this) executed by the terminal 101 in any of the above methods, which will not be repeated here.

[0469] FIG6B is a schematic diagram of the structure of a network device proposed in an embodiment of the present disclosure. As shown in FIG6B , the network device 6200 may include: at least one of a transceiver module 6201, a processing module, etc. In some embodiments, the transceiver module is used to send at least one first information to a terminal, wherein the first information includes configuration information of at least one cell or cell group; the first information is used for the terminal to trigger a random access process in a candidate cell corresponding to the first information when a first condition is met, wherein the random access process corresponds to a first media access control MAC entity.

[0470] Optionally, the above-mentioned transceiver module is used to execute at least one of the communication steps such as sending and / or receiving (such as step S2101, but not limited to this) performed by the network device 102 in any of the above methods, which will not be repeated here.

[0471] In some embodiments, the transceiver module may include a sending module and / or a receiving module, and the sending module and the receiving module may be separate or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

[0472] In some embodiments, the processing module can be a module or include multiple submodules. Optionally, the multiple submodules respectively execute all or part of the steps required to be executed by the processing module. Optionally, the processing module can be replaced with the processor.

[0473] FIG7A is a schematic diagram of the structure of a communication device 7100 proposed in an embodiment of the present disclosure. The communication device 7100 may be a network device (e.g., an access network device, a core network device, etc.), or a terminal (e.g., a user device, etc.), or 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. The communication device 7100 may be used to implement the method described in the above method embodiment, and the details may refer to the description in the above method embodiment.

[0474] As shown in FIG. 7A , the communication device 7100 includes one or more processors 7101. The processor 7101 may be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor may be used to process the communication protocol and the communication data, and the central processing unit may be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute a program, and process the data of the program. The communication device 7100 is used to execute any of the above methods.

[0475] In some embodiments, the communication device 7100 further includes one or more memories 7102 for storing instructions. Optionally, all or part of the memory 7102 may also be outside the communication device 7100.

[0476] 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 transceiver 7103 performs at least one of the communication steps such as sending and / or receiving in the above method (for example, step S2101, step S2102, but not limited thereto), and the processor 7101 performs at least one of the other steps (for example, step S2103, but not limited thereto).

[0477] In some embodiments, the transceiver may include a receiver and / or a transmitter, and the receiver and the transmitter may be separate or integrated. Optionally, the terms such as transceiver, transceiver unit, transceiver, transceiver circuit, etc. may be replaced with each other, the terms such as transmitter, transmission unit, transmitter, transmission circuit, etc. may be replaced with each other, and the terms such as receiver, receiving unit, receiver, receiving circuit, etc. may be replaced with each other.

[0478] In some embodiments, the communication device 7100 may include one or more interface circuits 7104. Optionally, the interface circuit 7104 is connected to the memory 7102, and the interface circuit 7104 may be used to receive signals from the memory 7102 or other devices, and may be used to send signals to the memory 7102 or other devices. For example, the interface circuit 7104 may read instructions stored in the memory 7102 and send the instructions to the processor 7101.

[0479] The communication device 7100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 7100 described in 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 and 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, a vehicle-mounted device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0480] 7B is a schematic diagram of the structure of a chip 7200 provided in an embodiment of the present disclosure. In the case where the communication device 7100 may be a chip or a chip system, reference may be made to the schematic diagram of the structure of the chip 7200 shown in FIG. 7B , but the present disclosure is not limited thereto.

[0481] The chip 7200 includes one or more processors 7201, and the chip 7200 is used to execute any of the above methods.

[0482] In some embodiments, the chip 7200 further includes one or more interface circuits 7202. Optionally, the interface circuit 7202 is connected to the memory 7203. The interface circuit 7202 can be used to receive signals from the memory 7203 or other devices, and the interface circuit 7202 can be used to send signals to the memory 7203 or other devices. For example, the interface circuit 7202 can read instructions stored in the memory 7203 and send the instructions to the processor 7201.

[0483] In some embodiments, the interface circuit 7202 executes at least one of the communication steps such as sending and / or receiving in the above method (for example, step S2101, step S2102, but not limited to this), and the processor 7201 executes at least one of the other steps (for example, step S2103, but not limited to this).

[0484] In some embodiments, terms such as interface circuit, interface, transceiver pin, and transceiver may be used interchangeably.

[0485] In some embodiments, the chip 7200 further includes one or more memories 7203 for storing instructions. Optionally, all or part of the memory 7203 may be outside the chip 7200.

[0486] The present disclosure also proposes a storage medium, on which instructions are stored, and when the instructions are executed on the communication device 7100, the communication device 7100 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited to this, and it can also be a storage medium readable by other devices. Optionally, the storage medium can be a non-transitory storage medium, but is not limited to this, and it can also be a temporary storage medium.

[0487] The present disclosure also proposes a program product, which, when executed by the communication device 7100, enables the communication device 7100 to execute any of the above methods. Optionally, the program product is a computer program product.

[0488] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to execute any one of the above methods.

[0489] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, the process or function described in the embodiment of the present disclosure is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a high-density digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0490] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this disclosure.

[0491] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0492] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

A random access method, characterized in that: The method is executed by a terminal, and includes: receiving at least one first information sent by a network device, wherein the first information includes configuration information of at least one cell or a cell group; determining that a first condition is met, and initiating a random access process in a candidate cell corresponding to the first information, wherein the random access process corresponds to a first media access control MAC entity. The method according to claim 1, characterized in that The first MAC entity is any one of the following: a MAC entity corresponding to the first cell group; a MAC entity corresponding to the first information; a MAC entity corresponding to the cell group corresponding to the first information; a MAC entity corresponding to the second information, wherein the second information is used to trigger the random access process of the terminal in the candidate cell. The method according to claim 2, characterized in that The first cell group is a main cell group MCG or a secondary cell group SCG. The method according to claim 2, characterized in that The MAC entity corresponding to each of the at least one first information is different; or, the MAC entity corresponding to each of the at least one first information is the same; or, the at least one first information is included in at least one first set, and the MAC entity corresponding to each of the first sets is different. The method according to any one of claims 1 to 4, characterized in that The first MAC entity corresponds to multiple random access processes, and the multiple random access processes are all random access processes in candidate cells. The method according to claim 5, characterized in that The method further includes determining a maximum number of the plurality of random access procedures supported by the terminal. The method according to any one of claims 1 to 4, characterized in that The first MAC entity corresponds to multiple random access processes, and the multiple random access processes include a random access process in a serving cell and a random access process in a candidate cell. The method also includes: terminating the random access process in the serving cell; or, terminating the random access process in the candidate cell. The method according to any one of claims 1 to 7, characterized in that The at least one cell or cell group corresponding to the configuration information included in the first information includes the candidate cell. The method according to any one of claims 1 to 8, characterized in that The random access process is a random access process before the serving cell of the terminal is changed to the candidate cell. The method according to any one of claims 1 to 9, characterized in that The first condition includes any one or more of the following: receiving second information sent by the network device, where the second information is used to trigger the random access process of the terminal in the candidate cell; a measurement value of the candidate cell is greater than or equal to a first threshold value; The measurement value of the current serving cell of the terminal is less than or equal to the second threshold value. The method according to claim 10, characterized in that The second information includes at least one of a random access preamble identifier and an identifier of the first information. The method according to claim 10 or 11, characterized in that The first condition is receiving second information sent by the network device, and the method further includes: determining resource information corresponding to the uplink signal sent by the terminal during the random access process. The method according to claim 12, characterized in that The resource information includes at least one of the following: information of a candidate cell corresponding to the first information; an identifier of a frequency domain resource; and a type of a frequency domain resource. The method according to claim 13, characterized in that The information of the candidate cell corresponding to the first information includes at least one of the following: a cell identifier; a cell group identifier; an identifier of the first information; and a cell type identifier. The method according to any one of claims 1 to 14, characterized in that The method further includes: determining that a second condition is satisfied, and terminating the random access process. The method according to claim 15, characterized in that The second condition includes any one or more of the following: the terminal triggers a new random access process, and the new random access process corresponds to the first MAC entity; the terminal triggers a new random access process in a candidate cell, and the new random access process in the candidate cell corresponds to the first MAC entity. The method according to claim 16, characterized in that The method also includes: determining that the network device triggers the retransmission of the random access preamble of the same random access process, and increasing the power climb count; determining that the network device triggers the first transmission of the random access preamble of the same random access process, and determining that the power climb count is an initial value. A random access method, characterized in that: The method is executed by a network device, and the method includes: sending at least one first information to a terminal, the first information including configuration information of at least one cell or cell group; the first information is used by the terminal to determine whether a first condition is met, and to initiate a random access process in a candidate cell corresponding to the first information, wherein the random access process corresponds to a first media access control MAC entity. The method according to claim 18, characterized in that The first MAC entity is any one of the following: a MAC entity corresponding to the first cell group; a MAC entity corresponding to the first information; a MAC entity corresponding to the cell group corresponding to the first information; a MAC entity corresponding to the second information, wherein the second information is used to trigger the random access process of the terminal in the candidate cell. The method according to claim 19, characterized in that The first cell group is a main cell group MCG or a secondary cell group SCG. The method according to claim 19, characterized in that The MAC entity corresponding to each of the at least one first information is different; or, the MAC entity corresponding to each of the at least one first information is the same; or, the at least one first information is included in at least one first set, and the MAC entity corresponding to each of the first sets is different. The method according to any one of claims 18 to 21, characterized in that The first MAC entity corresponds to multiple random access processes, and the multiple random access processes are all random access processes in candidate cells. The method according to claim 22, characterized in that The method further includes: sending, to the terminal, a maximum number of the plurality of random access procedures supported by the terminal. The method according to any one of claims 18 to 21, characterized in that The first MAC entity corresponds to multiple random access processes, and the multiple random access processes include a random access process in a serving cell and a random access process in a candidate cell, and the random access process in the serving cell is terminated by the terminal; or, the random access process in the candidate cell is terminated by the terminal. The method according to any one of claims 18 to 24, characterized in that The at least one cell or cell group corresponding to the configuration information included in the first information includes the candidate cell. The method according to any one of claims 18 to 25, characterized in that The random access process is a random access process before the serving cell of the terminal is changed to the candidate cell. The method according to any one of claims 18 to 26, characterized in that The first condition includes any one or more of the following: the terminal receives second information sent by the network device, and the second information is used to trigger the random access process of the terminal in the candidate cell; the measurement value of the candidate cell is greater than or equal to the first threshold value; The measurement value of the current serving cell of the terminal is less than or equal to the second threshold value. The method according to claim 27, characterized in that The second information includes at least one of a random access preamble identifier and an identifier of the first information. The method according to claim 27 or 28, characterized in that The first condition is that the terminal receives second information sent by the network device, and the method further includes: sending resource information to the terminal, where the resource information corresponds to an uplink signal sent by the terminal during the random access process. The method according to claim 29, characterized in that The resource information includes at least one of the following: information of a candidate cell corresponding to the first information; an identifier of a frequency domain resource; and a type of a frequency domain resource. The method according to claim 30, characterized in that The information of the candidate cell corresponding to the first information includes at least one of the following: a cell identifier; a cell group identifier; an identifier of the first information; and a cell type identifier. A random access method, characterized in that: The method includes: a network device sends at least one first information to a terminal, the first information including configuration information of at least one cell or cell group; the terminal determines that a first condition is met, and initiates a random access process in a candidate cell corresponding to the first information, wherein the random access process corresponds to a first media access control MAC entity. The method according to claim 32, characterized in that The first MAC entity is any one of the following: a MAC entity corresponding to the first cell group; a MAC entity corresponding to the first information; a MAC entity corresponding to the cell group corresponding to the first information; a MAC entity corresponding to the second information, wherein the second information is used to trigger the random access process of the terminal in the candidate cell. The method according to claim 33, characterized in that The first cell group is a main cell group MCG or a secondary cell group SCG. The method according to claim 33, characterized in that The MAC entity corresponding to each of the at least one first information is different; or, the MAC entity corresponding to each of the at least one first information is the same; or, the at least one first information is included in at least one first set, and the MAC entity corresponding to each of the first sets is different. The method according to any one of claims 32 to 35, characterized in that The first MAC entity corresponds to multiple random access processes, and the multiple random access processes are all random access processes in candidate cells. The method according to claim 36, characterized in that The method further includes: determining, by the terminal, a maximum number of the plurality of random access procedures supported by the terminal. The method according to any one of claims 32 to 35, characterized in that The first MAC entity corresponds to multiple random access processes, and the multiple random access processes include a random access process in a serving cell and a random access process in a candidate cell. The method also includes: the terminal terminating the random access process in the serving cell; or, the terminal terminating the random access process in the candidate cell. The method according to any one of claims 32 to 38, characterized in that The at least one cell or cell group corresponding to the configuration information included in the first information includes the candidate cell. The method according to any one of claims 32 to 39, characterized in that The method further includes: the terminal determining that a second condition is satisfied, and terminating the random access process. The method according to claim 40, characterized in that The second condition includes any one or more of the following: the terminal triggers a new random access process, and the new random access process corresponds to the first MAC entity; the terminal triggers a new random access process in a candidate cell, and the new random access process in the candidate cell corresponds to the first MAC entity. The method according to claim 41, characterized in that The method also includes: the terminal determines that the network device triggers the retransmission of the random access preamble of the same random access process, and the terminal increases the power climb count; the terminal determines that the network device triggers the first transmission of the random access preamble of the same random access process, and the terminal determines that the power climb count is an initial value. A terminal, characterized in that: The terminal includes: a transceiver module, used to receive at least one first information sent by a network device, the first information including configuration information of at least one cell or cell group; a processing module, used to determine whether a first condition is met and initiate a random access process in a candidate cell corresponding to the first information, wherein the random access process corresponds to a first media access control MAC entity. A network device, characterized in that: The network device includes: a transceiver module, used to send at least one first information to a terminal, the first information including configuration information of at least one cell or cell group; the first information is used by the terminal to determine whether a first condition is met and to initiate a random access process in a candidate cell corresponding to the first information, wherein the random access process corresponds to a first media access control MAC entity. A communication device, characterized in that: The communication device comprises: one or more processors; wherein the communication device is used to execute the random access method according to any one of claims 1 to 17, or to execute the random access method according to any one of claims 18 to 31. A communication system, characterized in that: The method comprises a terminal and a network device, wherein the terminal is configured to implement the random access method according to any one of claims 1 to 17, and the network device is configured to implement the random access method according to any one of claims 18 to 31. A storage medium stores instructions, characterized in that: When the instruction is executed on a communication device, the communication device is enabled to perform the random access method according to any one of claims 1-17 or 18-31.

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