Communication method, terminal, network device, communication device, and storage medium

Abstract

Embodiments of the present disclosure relate to a communication method, a terminal, a network device, a communication device, and a storage medium. The communication method may be applied to a terminal. The method comprises: when condition-based mobility is triggered, determining a first beam; and performing random access channel-less cell access on the basis of the first beam. In this way, in the embodiments of the present disclosure, the terminal selects a suitable beam for performing random access channel-less cell access, thereby reducing the probability of cell access failure.

Description

Communication method, terminal, network device, communication device and storage medium Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a communication method, a terminal, a network device, a communication device, and a storage medium. Background Art

[0002] With the development of wireless communication systems, mobility enhancement technologies have been introduced to improve the efficiency and stability of terminal handovers between different cells. These technologies include, for example, conditional handover (CHO), conditional primary and secondary cell addition / change (CPAC), cell group selective activation, and conditional layer 1 / layer 2 triggered mobility (C-LTM). The above technologies are also referred to as "conditionally triggered mobility procedures."

[0003] Summary of the Invention

[0004] When a terminal triggers mobility based on conditional triggering, how to perform random access channel-less (RACH-less) cell access is a problem that needs to be solved.

[0005] The embodiments of the present disclosure provide a communication method, a terminal, a network device, a communication device, and a storage medium.

[0006] According to a first aspect of an embodiment of the present disclosure, a communication method is proposed, which is executed by a terminal. The method includes: determining a first beam when condition-based mobility is triggered; and performing cell access without a random access channel based on the first beam.

[0007] According to a second aspect of an embodiment of the present disclosure, a communication method is proposed, which is performed by a network device, and the method includes: receiving uplink information based on a first beam, wherein the first beam is determined by the terminal to perform cell access without a random access channel when conditional-based mobility is triggered.

[0008] According to the third aspect of an embodiment of the present disclosure, a terminal is proposed, including: a first processing module, used to determine a first beam when conditional-based mobility is triggered; and a first transceiver module, used to perform cell access without a random access channel based on the first beam.

[0009] According to the fourth aspect of an embodiment of the present disclosure, a network device is proposed, including: a second transceiver module, used to receive uplink information based on a first beam, wherein the first beam is determined by the terminal to perform cell access without a random access channel when conditional-based mobility is triggered.

[0010] According to the fifth aspect of an embodiment of the present disclosure, a communication device is proposed, comprising: one or more processors; one or more memories for storing computer programs; wherein the processor executes the computer program to implement the steps of the communication party as described in the first and second aspects.

[0011] According to the sixth aspect of an embodiment of the present disclosure, a communication system is proposed, comprising a terminal and a network device, wherein the terminal is configured to implement the steps of the communication method described in the first aspect, and the network device is configured to implement the steps of the communication method described in the second aspect.

[0012] According to a seventh aspect of an embodiment of the present disclosure, a computer-readable storage medium is proposed, on which a computer program is stored, wherein when the computer program is executed by a processor, the steps of the communication party as described in the first and second aspects are implemented.

[0013] According to an eighth aspect of the embodiments of the present disclosure, a computer program product is proposed, comprising a computer program, which implements the steps of the communication party as described in the first and second aspects when the computer program is executed by a processor.

[0014] Through the embodiments of the present disclosure, when the terminal triggers a mobility process based on conditional triggering, the terminal selects a suitable beam for performing cell access without a random access channel, and performs cell access without a random access channel based on the beam, thereby reducing the probability of cell access failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following drawings required for describing the embodiments are introduced. The following drawings are merely some embodiments of the present disclosure and do not impose specific limitations on the protection scope of the present disclosure.

[0016] FIG1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present disclosure.

[0017] FIG2 is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure.

[0018] FIG3A is a schematic diagram showing a flow chart of a communication method executed by a terminal side according to an embodiment of the present disclosure.

[0019] FIG3B is a flow chart showing a communication method executed on a network device side according to an embodiment of the present disclosure.

[0020] FIG4A is a schematic diagram of a flow chart showing a communication method executed by a terminal side according to an embodiment of the present disclosure.

[0021] FIG4B is a flow chart showing a communication method executed on a network device side according to an embodiment of the present disclosure.

[0022] FIG5A is a schematic structural diagram of a terminal proposed in an embodiment of the present disclosure.

[0023] FIG5B is a schematic structural diagram of a network device proposed in an embodiment of the present disclosure.

[0024] FIG6A is a schematic structural diagram of a communication device proposed in an embodiment of the present disclosure.

[0025] FIG6B is a schematic structural diagram of a chip proposed in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0026] The embodiments of the present disclosure provide a communication method, a terminal, a network device, a communication system, and a storage medium.

[0027] In a first aspect, an embodiment of the present disclosure proposes a communication method, which is executed by a terminal, and the method includes: determining a first beam when condition-based mobility is triggered; and performing cell access without a random access channel based on the first beam.

[0028] In an embodiment of the present disclosure, when a conditionally triggered mobility process is triggered, the terminal can perform beam selection for performing cell access without a random access channel, and perform cell access without a random access channel based on the beam, thereby reducing the probability of cell access failure.

[0029] In combination with some embodiments of the first aspect, in some embodiments, the first beam includes at least one of the following: a second beam among the beams associated with the target cell; a beam whose measurement quality is greater than or equal to a threshold value; any beam associated with the target cell; a beam associated with a first measurement event, and the first measurement event is a measurement event that triggers conditional-based mobility.

[0030] In an embodiment of the present disclosure, the first beam may include a second beam among the beams associated with the target cell, a beam whose measurement quality is greater than or equal to a threshold value, any beam associated with the target cell, and at least one of the beams associated with a measurement event that triggers conditional-based mobility. These beams are more suitable for performing cell access without a random access channel when conditional-triggered mobility is triggered, thereby reducing the probability of cell access failure.

[0031] In combination with some embodiments of the first aspect, in some embodiments, the first beam is one of multiple third beams, and the third beam includes at least one of the following: a beam whose measurement quality is greater than or equal to a threshold value; a beam associated with a first measurement event, and the first measurement event is a measurement event that triggers conditional-based mobility.

[0032] In combination with some embodiments of the first aspect, in some embodiments, the first beam is a beam with the best measurement quality among the multiple third beams.

[0033] In combination with some embodiments of the first aspect, in some embodiments, the third beam includes a beam whose measurement quality is greater than or equal to a threshold value, the first beam is a beam associated with a first uplink resource among multiple third beams, and the first uplink resource is the uplink resource closest in time among the uplink resources associated with each third beam.

[0034] In combination with some embodiments of the first aspect, in some embodiments, the third beam includes a beam whose measurement quality is greater than or equal to a threshold value, the first beam is a beam associated with a first downlink control channel among multiple third beams, and the first downlink control channel is the downlink control channel closest in time among the downlink control channels associated with each third beam.

[0035] In combination with some embodiments of the first aspect, in some embodiments, the above method further includes: when no beam with a measurement quality greater than or equal to a threshold value is detected, determining that the first beam is any beam associated with the target cell.

[0036] In combination with some embodiments of the first aspect, in some embodiments, the above method further includes: performing cell access of a random access channel when no beam with a measurement quality greater than or equal to a threshold value is detected.

[0037] In combination with some embodiments of the first aspect, in some embodiments, based on the first beam, cell access without a random access channel is performed, including at least one of the following: sending uplink information on the uplink resources corresponding to the first beam; monitoring the second downlink control channel, which is the downlink control channel corresponding to the first beam.

[0038] In combination with some embodiments of the first aspect, in some embodiments, the above method further includes: sending uplink information on the uplink resources indicated by the second downlink control channel.

[0039] In combination with some embodiments of the first aspect, in some embodiments, the above method further includes: sending first information, where the first information is used to indicate the first beam.

[0040] In combination with some embodiments of the first aspect, in some embodiments, after performing cell access without a random access channel based on the first beam, the above method also includes: receiving second information on the downlink channel corresponding to the first beam, and the second information is used to indicate that the cell access without a random access channel is successfully executed.

[0041] In combination with some embodiments of the first aspect, in some embodiments, before triggering conditional-based mobility, the above method also includes: receiving third information, where the third information is used to indicate whether the terminal performs cell access without a random access channel when conditional-based mobility is triggered.

[0042] In combination with some embodiments of the first aspect, in some embodiments, before triggering condition-based mobility, the above method also includes: receiving fourth information, where the fourth information is used to indicate the association relationship between uplink resources and / or downlink resources and the beam.

[0043] In combination with some embodiments of the first aspect, in some embodiments, before triggering condition-based mobility, the above method also includes: receiving fifth information, where the fifth information is used to indicate uplink resources associated with cell access without a random access channel.

[0044] In a second aspect, an embodiment of the present disclosure proposes a communication method, which is executed by a network device, and the method includes: receiving uplink information based on a first beam, wherein the first beam is determined by the terminal to perform cell access without a random access channel when conditional-based mobility is triggered.

[0045] In combination with some embodiments of the second aspect, in some embodiments, the first beam includes at least one of the following: a second beam among the beams associated with the target cell; a beam whose measurement quality is greater than or equal to a threshold value; any beam associated with the target cell; a beam associated with a first measurement event, and the first measurement event is a measurement event that triggers conditional-based mobility.

[0046] In combination with some embodiments of the second aspect, in some embodiments, the first beam is one of multiple third beams, and the third beam includes at least one of the following: a beam whose measurement quality is greater than or equal to a threshold value; a beam associated with a first measurement event, and the first measurement event is a measurement event that triggers conditional-based mobility.

[0047] In combination with some embodiments of the second aspect, in some embodiments, the first beam is a beam with the best measurement quality among the multiple third beams.

[0048] In combination with some embodiments of the second aspect, in some embodiments, the third beam includes a beam whose measurement quality is greater than or equal to a threshold value, the first beam is a beam associated with a first uplink resource among multiple third beams, and the first uplink resource is the uplink resource closest in time among the uplink resources associated with each third beam.

[0049] In combination with some embodiments of the second aspect, in some embodiments, the third beam includes a beam whose measurement quality is greater than or equal to a threshold value, the first beam is a beam associated with a first downlink control channel among multiple third beams, and the first downlink control channel is the downlink control channel closest in time among the downlink control channels associated with each third beam.

[0050] In combination with some embodiments of the second aspect, in some embodiments, when no beam having a measurement quality greater than or equal to a threshold value is detected, the first beam is any beam associated with the target cell.

[0051] In combination with some embodiments of the second aspect, in some embodiments, the above method also includes: when a beam with a measurement quality greater than or equal to a threshold value is not detected, receiving a first message, wherein the first message is used for cell access of a random access channel.

[0052] In combination with some embodiments of the second aspect, in some embodiments, receiving uplink information based on the first beam includes at least one of the following: receiving uplink information on uplink resources corresponding to the first beam; receiving uplink information on uplink resources indicated by a second downlink control channel, where the second downlink control channel is a downlink control channel corresponding to the first beam.

[0053] In combination with some embodiments of the second aspect, in some embodiments, the above method further includes: receiving first information, where the first information is used to indicate the first beam.

[0054] In combination with some embodiments of the second aspect, in some embodiments, after receiving the first beam, the above method also includes: sending second information on the downlink channel corresponding to the first beam, and the second information is used to indicate that the cell access without the random access channel is successfully executed.

[0055] In combination with some embodiments of the second aspect, in some embodiments, after receiving the first beam, the above method also includes: sending third information, where the third information is used to indicate whether the terminal performs cell access without a random access channel when conditional-based mobility is triggered.

[0056] In combination with some embodiments of the second aspect, in some embodiments, after receiving the first beam, the above method also includes: sending fourth information, where the fourth information is used to indicate the association relationship between the uplink resources and / or downlink resources and the beam.

[0057] In combination with some embodiments of the second aspect, in some embodiments, after receiving the first beam, the above method also includes: sending fifth information, where the fifth information is used to indicate uplink resources associated with cell access without a random access channel.

[0058] In a third aspect, an embodiment of the present disclosure proposes a terminal, comprising: a first processing module, used to determine a first beam when condition-based mobility is triggered; and a first transceiver module, used to perform cell access without a random access channel based on the first beam.

[0059] In combination with some embodiments of the third aspect, in some embodiments, the first beam includes at least one of the following: a second beam among the beams associated with the target cell; a beam whose measurement quality is greater than or equal to a threshold value; any beam associated with the target cell; a beam associated with a first measurement event, and the first measurement event is a measurement event that triggers conditional-based mobility.

[0060] In combination with some embodiments of the third aspect, in some embodiments, the first beam is one of multiple third beams, and the third beam includes at least one of the following: a beam whose measurement quality is greater than or equal to a threshold value; a beam associated with a first measurement event, and the first measurement event is a measurement event that triggers conditional-based mobility.

[0061] In combination with some embodiments of the third aspect, in some embodiments, the first beam is a beam with the best measurement quality among the multiple third beams.

[0062] In combination with some embodiments of the third aspect, in some embodiments, the third beam includes a beam whose measurement quality is greater than or equal to a threshold value, the first beam is a beam associated with a first uplink resource among multiple third beams, and the first uplink resource is the uplink resource closest in time among the uplink resources associated with each third beam.

[0063] In combination with some embodiments of the third aspect, in some embodiments, the third beam includes a beam whose measurement quality is greater than or equal to a threshold value, the first beam is a beam associated with a first downlink control channel among multiple third beams, and the first downlink control channel is the downlink control channel closest in time among the downlink control channels associated with each third beam.

[0064] In combination with some embodiments of the third aspect, in some embodiments, the first processing module is further used to determine that the first beam is any beam associated with the target cell when no beam with a measurement quality greater than or equal to a threshold value is detected.

[0065] In combination with some embodiments of the third aspect, in some embodiments, the first transceiver module is configured to perform cell access on a random access channel when no beam with a measurement quality greater than or equal to a threshold value is detected.

[0066] In combination with some embodiments of the third aspect, in some embodiments, the first transceiver module is used to perform at least one of the following: sending uplink information on the uplink resources corresponding to the first beam; monitoring the second downlink control channel, which is the downlink control channel corresponding to the first beam.

[0067] In combination with some embodiments of the third aspect, in some embodiments, the first transceiver module is further configured to send uplink information on the uplink resources indicated by the second downlink control channel.

[0068] In combination with some embodiments of the third aspect, in some embodiments, the first transceiver module is further used to send first information, where the first information is used to indicate the first beam.

[0069] In combination with some embodiments of the third aspect, in some embodiments, the first transceiver module is also used to: after performing cell access without a random access channel based on the first beam, receive second information on the downlink channel corresponding to the first beam, and the second information is used to indicate that the cell access without a random access channel is successfully executed.

[0070] In combination with some embodiments of the third aspect, in some embodiments, the first transceiver module is also used to: receive third information before triggering conditional-based mobility, and the third information is used to indicate whether the terminal performs cell access without a random access channel when conditional-based mobility is triggered.

[0071] In combination with some embodiments of the third aspect, in some embodiments, the first transceiver module is also used to: receive fourth information before triggering conditional-based mobility, and the fourth information is used to indicate the association relationship between uplink resources and / or downlink resources and the beam.

[0072] In combination with some embodiments of the third aspect, in some embodiments, the first transceiver module is further used to: before triggering conditional-based mobility, receive fifth information, where the fifth information is used to indicate uplink resources associated with cell access without a random access channel.

[0073] In a fourth aspect, an embodiment of the present disclosure proposes a network device, comprising: a second transceiver module, used to receive uplink information based on a first beam, wherein the first beam is determined by the terminal to perform cell access without a random access channel when conditional-based mobility is triggered.

[0074] In combination with some embodiments of the fourth aspect, in some embodiments, the first beam includes at least one of the following: a second beam among the beams associated with the target cell; a beam whose measurement quality is greater than or equal to a threshold value; any beam associated with the target cell; a beam associated with a first measurement event, and the first measurement event is a measurement event that triggers conditional-based mobility.

[0075] In combination with some embodiments of the fourth aspect, in some embodiments, the first beam is one of multiple third beams, and the third beam includes at least one of the following: a beam whose measurement quality is greater than or equal to a threshold value; a beam associated with a first measurement event, and the first measurement event is a measurement event that triggers conditional-based mobility.

[0076] In combination with some embodiments of the fourth aspect, in some embodiments, the first beam is a beam with the best measurement quality among the multiple third beams.

[0077] In combination with some embodiments of the fourth aspect, in some embodiments, the third beam includes a beam whose measurement quality is greater than or equal to a threshold value, the first beam is a beam associated with a first uplink resource among multiple third beams, and the first uplink resource is the uplink resource closest in time among the uplink resources associated with each third beam.

[0078] In combination with some embodiments of the fourth aspect, in some embodiments, the third beam includes a beam whose measurement quality is greater than or equal to a threshold value, the first beam is a beam associated with a first downlink control channel among multiple third beams, and the first downlink control channel is the downlink control channel closest in time among the downlink control channels associated with each third beam.

[0079] In combination with some embodiments of the fourth aspect, in some embodiments, when no beam with a measurement quality greater than or equal to a threshold value is detected, the first beam is any beam associated with the target cell.

[0080] In combination with some embodiments of the fourth aspect, in some embodiments, the second transceiver module is also used to: receive a first message when no beam with a measurement quality greater than or equal to a threshold value is detected, wherein the first message is used for cell access of a random access channel.

[0081] In combination with some embodiments of the fourth aspect, in some embodiments, the second transceiver module is also used to perform at least one of the following: receiving uplink information on the uplink resources corresponding to the first beam; receiving uplink information on the uplink resources indicated by the second downlink control channel, and the second downlink control channel is the downlink control channel corresponding to the first beam.

[0082] In combination with some embodiments of the fourth aspect, in some embodiments, the above method also includes: receiving first information, where the first information is used to indicate the first beam.

[0083] In combination with some embodiments of the fourth aspect, in some embodiments, the second transceiver module is also used to: after receiving the first beam, send second information on the downlink channel corresponding to the first beam, and the second information is used to indicate that the cell access without the random access channel is successfully executed.

[0084] In combination with some embodiments of the fourth aspect, in some embodiments, the second transceiver module is also used to: after receiving the first beam, send third information, and the third information is used to indicate whether the terminal performs cell access without a random access channel when conditional-based mobility is triggered.

[0085] In combination with some embodiments of the fourth aspect, in some embodiments, the second transceiver module is also used to: after receiving the first beam, send fourth information, and the fourth information is used to indicate the association relationship between the uplink resources and / or downlink resources and the beam.

[0086] In combination with some embodiments of the fourth aspect, in some embodiments, the second transceiver module is further used to: after receiving the first beam, send fifth information, and the fifth information is used to indicate the uplink resources associated with the cell access without the random access channel.

[0087] In a fifth aspect, an embodiment of the present disclosure proposes a communication device, comprising: one or more processors; wherein the above-mentioned access network node is used to execute the steps of the communication method described in any one of the first aspect, the second aspect and their optional implementation methods.

[0088] In the sixth 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 steps of the communication method as described in any one of the first aspect and its optional implementation methods, and the network device is configured to execute the steps of the communication method as described in any one of the second aspect and its optional implementation methods.

[0089] In the seventh aspect, an embodiment of the present disclosure proposes a storage medium, which stores instructions. When the instructions are executed on an access network node, the communication device executes the method described in the optional implementation of the first and second aspects.

[0090] In an eighth 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 steps of the communication method as described in any one of the first aspect, the second aspect and their optional implementation methods.

[0091] In a ninth aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the steps of the communication method as described in any one of the first aspect, the second aspect, and their optional implementations.

[0092] In a tenth aspect, an embodiment of the present disclosure provides a chip or a chip system, wherein the chip or chip system includes a processing circuit configured to execute the steps of the communication method as described in any one of the first aspect, the second aspect, and their optional implementations.

[0093] It is understandable that the above-mentioned communication devices, communication systems, storage media, program products, computer programs, chips, or chip systems are all used to perform the methods proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding methods and will not be repeated here.

[0094] The present disclosure provides a communication method, terminal, network device, communication device, and storage medium. In some embodiments, the terms communication method, information processing method, cell access method, condition-based mobility management method, etc., are interchangeable, and the terms information processing system, communication system, etc. are interchangeable.

[0095] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0096] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0097] 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.

[0098] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article may be understood as a singular expression or a plural expression.

[0099] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0100] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0101] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on 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); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0102] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on 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). The above is also applicable when there are more branches such as A, B, C, etc.

[0103] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information", then the "first information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0104] 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.

[0105] In some embodiments, terms such as "time / frequency" and "time / frequency domain" refer to at least one of a time domain and a frequency domain.

[0106] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0107] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not less than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "not more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0108] In some embodiments, devices, etc. can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as "device", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", and "subject" can be used interchangeably.

[0109] In some embodiments, "network" can be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

[0110] In some embodiments, the terms "access network device (AN device)", "radio access network device (RAN device)", "base station (BS)", "radio base station" "fixed station", "node", "access network node", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)" "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femtocell", "picocell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)" and the like may be used interchangeably.

[0111] In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal", "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, etc. can be used interchangeably.

[0112] In some embodiments, the access network device, the core network device, or the network device can be replaced by a terminal. For example, the various embodiments of the present disclosure can also be applied to a structure in which the communication between the access network device, the core network device, or the network device and the terminal is replaced by communication between multiple terminals (for example, device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it is also possible to set the structure in which the terminal has all or part of the functions of the access network device. In addition, terms such as "uplink" and "downlink" can also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. can be replaced by side channels, and uplinks, downlinks, etc. can be replaced by side links.

[0113] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, the core network device, or the network device may have a structure that has all or part of the functions of the terminal.

[0114] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0115] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0116] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0117] FIG1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present disclosure.

[0118] As shown in Figure 1, a communication system 100 includes a terminal 101 and a network device 102. The network device 102 may be at least one of an access network device and a core network device.

[0119] In some embodiments, the terminal 101 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited thereto.

[0120] In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network. The access 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.

[0121] In some embodiments, the technical solution of the present disclosure can be applied 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 can be transformed into internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0122] In some embodiments, the access network device can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the access network device, with the functions of some protocol layers centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0123] In some embodiments, the CU and DU may be centrally deployed on one access network device, or distributedly deployed on multiple access network devices.

[0124] In some embodiments, the access network device can be implemented using one or more access network devices. An access network device may include a CU and at least one DU. A CU can be connected to multiple DUs, and a DU can only be connected to one CU.

[0125] 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 skilled 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.

[0126] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1 , or a portion thereof, but are not limited thereto. The entities shown in FIG1 are illustrative only. The communication system may include all or part of the entities shown in FIG1 , or may include other entities outside of FIG1 . The number and form of the entities are arbitrary, and the entities may be physical or virtual. The connection relationships between the entities are illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0127] The embodiments of the present disclosure can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G New Radio (NR), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New Radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X), systems utilizing other communication methods, and next-generation systems based on and extending these methods. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0128] The following describes and explains the terms involved in the embodiments of the present disclosure.

[0129] 1. L1 / L2-triggered mobility (LTM)

[0130] In a communication system, the network side may provide a terminal with multiple "candidate cells (or candidate cell groups)". In some embodiments, the network side may subsequently control the terminal to change among multiple "candidate cells (or candidate cell groups)" through L1 signaling (e.g., downlink control information (DCI)) or L2 signaling (e.g., media access control (MAC) control element (CE)). For example, the working cell (or cell group) is changed from "candidate cell (or candidate cell group)-1" to "candidate cell (or candidate cell group)-2". Among them, one serving cell (or serving cell group) may correspond to one or more "candidate cells (or candidate cell groups)". In some embodiments, the LTM process can reduce the mobility delay of the terminal.

[0131] In some embodiments, LTM is a cell switching procedure of a primary cell (PCell) (or a primary secondary cell (PSCell)) triggered by the network via MAC CE based on L1 measurements.

[0132] In some embodiments, during the LTM process, the base station receives an L1 measurement report from the terminal and, based on the measurement report, changes the terminal's serving cell via a cell handover command carried in a MAC CE. The cell handover command indicates the LTM candidate cell configuration that the base station has prepared and provided to the terminal via RRC signaling. The terminal then switches to the target cell in accordance with the cell handover command.

[0133] In some embodiments, LTM can be used to trigger changes in PCell or master cell group (MCG) and / or PSCell or secondary cell group (SCG). LTM can also be used to trigger changes in secondary cell (SCell).

[0134] 2. Mobility based on conditional triggering

[0135] In a communication system, a terminal can perform mobility based on network-preconfigured execution conditions (e.g., specific measurement events) and the preconfigured cells (or cell groups) corresponding to the execution conditions. When the execution conditions are met, the terminal can change its serving cell (or cell group) to the cell (or cell group) corresponding to the execution conditions, i.e., perform serving cell switching based on a certain execution condition.

[0136] In some embodiments, the above-mentioned mobility based on conditional triggering may include: conditional handover (CHO), conditional PSCell addition (CPA), and conditional PSCell change (CPC).

[0137] Conditional Handover (CHO) refers to a handover performed by the terminal when one or more handover execution conditions are met. The terminal begins evaluating the execution conditions after receiving the CHO configuration and stops evaluating the execution conditions after the handover is executed. CHO applies to the following criteria: The CHO configuration includes the CHO candidate cell configuration and execution conditions; an execution condition may contain one or two triggering conditions (such as Event A3 and Event A5).

[0138] Conditional PSCell Addition (CPA) means that the terminal performs PSCell addition when the execution conditions are met. The terminal starts evaluating the execution conditions upon receiving the CPA configuration and stops evaluating the execution conditions once a PCell addition or PCell change is triggered.

[0139] Conditional PSCell Change (CPC) means that the terminal executes a PSCell change when the execution conditions are met. After receiving the CPC configuration, the terminal begins evaluating the execution conditions. If a PCell change occurs or a PCell change is triggered, the terminal stops evaluating the execution conditions.

[0140] In some embodiments, CPA and CPC may be collectively referred to as conditional PSCell addition or change (CPAC).

[0141] In some embodiments, when the execution condition is met, the terminal may change the configuration of a cell (or cell group). For example, the terminal may change the PCell configuration from candidate cell (or cell group) configuration-1 to candidate cell (or cell group) configuration-2.

[0142] In some embodiments, the network may also configure corresponding execution conditions for the candidate configurations of the aforementioned LTM. When the execution conditions are met, the terminal may change the serving cell configuration (or cell group configuration) to the candidate configuration of LTM. In other words, the terminal may determine whether to execute LTM based on whether the conditions are met. This is also called conditional LTM (C-LTM).

[0143] In some embodiments, the above-mentioned mobility based on conditional triggering may further include: C-LTM.

[0144] 3. RACH-less cell access

[0145] When the terminal is switched or the cell is changed, it can send uplink information directly in the target cell according to the network instruction (for example, sending uplink data through an uplink channel (such as the physical uplink shared channel (PUSCH)) without initiating a random access process. In this case, the cell access process is called RACH-less cell access.

[0146] In some embodiments, the network may instruct the terminal to perform RACH-less cell access through, for example, a radio resource control (RRC) message, a multimedia access control (MAC) control element (CE), etc. In one example, the network may instruct the terminal to perform RACH-less cell access through a MAC CE carrying an LTM cell switch command.

[0147] In some embodiments, the uplink resources used for RACH-less cell access to transmit uplink information may be uplink resources (such as dynamic grant (DG)) scheduled by downlink control information (DCI).

[0148] In some embodiments, the uplink resources used for RACH-less cell access to send uplink information may be uplink resources configured by RRC (such as configured grant (CG)).

[0149] It should be noted that the above-mentioned terms such as "change", "alteration", "switch", and "move" can be used interchangeably.

[0150] In the embodiments of the present disclosure, for the above-mentioned "condition-based mobility", when the terminal performs RACH-less cell access, how to select the beam for accessing the target cell and how the terminal and the network device reach a consensus on the selected beam are problems that need to be solved.

[0151] FIG2 is a first interaction diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG2 , the embodiment of the present disclosure relates to a communication method, which is executed by the above-mentioned communication system. The above-mentioned method includes steps S210 to S280.

[0152] In step S210 , the network device sends configuration information.

[0153] In some embodiments, the terminal receives configuration information.

[0154] In some embodiments, configuration information may be used to configure conditional mobility. In one embodiment, the configuration information may include configuration information for conditional mobility. In one exemplary embodiment, the configuration information for conditional mobility may include one or more execution conditions and candidate configurations. For example, the candidate configurations may include LTM candidate configurations, CHO candidate configurations, etc.

[0155] In some embodiments, the network device further configures one or more associated beams (referred to as a third beam) for the target cell in the candidate configuration (also referred to as a candidate cell). The second beam can be used by the terminal for subsequent beam selection for RACH-less cell access.

[0156] In some embodiments, the network device may further configure one or more beams (referred to as second beams) among the beams associated with the candidate cell to be used for performing RACH-less cell access to the target cell.

[0157] In one example, a "beam" can be identified by at least one of the following methods: a spatial relationship identifier (e.g., a transmission configuration indicator (TCI) status identifier); a reference signal identifier (e.g., a synchronization signal block (SSB) identifier, a channel state information reference signal (CSI-RS) identifier).

[0158] In some embodiments, the condition-based mobility may include at least one of the following: CHO, CPA, CPC, and C-LTM.

[0159] In some embodiments, the configuration information may be configured via RRC signaling. In one example, the RRC signaling may be RRC configuration signaling, RRC reconfiguration signaling, or the like.

[0160] In step S220 , the network device sends third information.

[0161] In some embodiments, the terminal receives third information.

[0162] In some embodiments, the third information is used to indicate whether the terminal performs RACH-less cell access when conditional-based mobility is triggered. In one embodiment, the third information can be carried in downlink signaling such as RRC signaling, MAC CE signaling, and DCI.

[0163] In some embodiments, step S220 may be omitted. In this case, the terminal may determine whether to perform RACH-less cell access when condition-based mobility is triggered based on protocol provisions or its own implementation.

[0164] In one example, the terminal may also perform RACH-less cell access by default when conditional mobility is triggered based on protocol provisions or its own implementation. In another example, the terminal may also perform RACH-less cell access by default when conditional mobility is triggered based on protocol provisions or its own implementation.

[0165] In some embodiments, the third information may be specific to one or more specific cells. Based on the third information, the terminal may determine whether to perform RACH-less cell access on the specific cell when condition-based mobility is triggered. In some embodiments, the specific cell may be a cell selected by the network device. In some embodiments, the specific cell may also be a candidate cell configured by the network device for one or more specific execution conditions.

[0166] In one example, when the timing advance (TA) of the target cell is known, the terminal determines, based on protocol provisions or its own implementation, to perform RACH-less cell access when conditional mobility is triggered. In this case, when the execution condition is met, the terminal triggers mobility for cell 1 corresponding to the execution condition. If the TA of the target cell (i.e., cell 1) is known to the terminal, the terminal can determine to perform RACH-less cell access for cell 1. In one example, the terminal can obtain the TA of the target cell through methods such as network advance indication or self-calculation.

[0167] In one example, when uplink resources are known, the terminal determines, based on protocol specifications or its own implementation, to perform RACH-less cell access when conditional mobility is triggered. In this case, when the execution condition is met, the terminal triggers mobility for cell 1 corresponding to the execution condition. If the uplink resources are known to the terminal, the terminal may determine to perform RACH-less cell access for cell 1. In one example, the terminal may obtain uplink resources through RRC signaling or DCI signaling.

[0168] In one example, when the target cell's TA and uplink resources are known, the terminal determines, based on protocol specifications or its own implementation, to perform RACH-less cell access when conditional mobility is triggered. In this case, if the execution condition is met, the terminal triggers mobility for cell 1 corresponding to the execution condition. If the TA and uplink resources of cell 1 are known to the terminal, the terminal can determine to perform RACH-less cell access for cell 1.

[0169] Of course, the terminal may also determine whether to perform RACH-less cell access when conditional mobility is triggered based on protocol provisions or its own implementation in other situations, and the embodiments of the present disclosure do not specifically limit this.

[0170] In step S230 , the network device sends fifth information.

[0171] In some embodiments, the terminal receives fifth information.

[0172] In some embodiments, the fifth information is used to indicate the uplink resources associated with RACH-less cell access. In some embodiments, when performing RACH-less cell access for a candidate cell, the network device may provide the corresponding uplink resources to the terminal by way of RRC configuration and / or DCI indication. In one example, the uplink resources associated with RACH-less cell access may be resources configured by RRC (such as Configured Grant Type-1). In one example, the uplink resources associated with RACH-less cell access may be resources indicated by a physical downlink control channel (PDCCH) (such as a DG indicated by DCI).

[0173] In step S240 , the network device sends fourth information.

[0174] In some embodiments, the terminal receives fourth information.

[0175] In some embodiments, the fourth information is used to indicate the association relationship between uplink resources and / or downlink resources and beams. Based on this relationship, the terminal can determine the uplink resources for cell access that performs RACH-less. In some embodiments, the above-mentioned association relationship can be an association relationship between uplink resources and / or downlink resources and beams associated with candidate cells. In some embodiments, the above-mentioned association relationship can be an association relationship between uplink resources and / or downlink resources and beams associated with candidate cells. In one example, the beam in the above-mentioned association relationship can be the second beam or the third beam configured in step S210, or it can be part or all of the beams of the network device. Of course, there can be other situations, and the embodiments of the present disclosure do not specifically limit this.

[0176] In some embodiments, uplink resources are used by a terminal to send uplink information to a network device. In one example, the uplink resources may be an uplink grant, such as at least one of a CG and a DG. In some embodiments, downlink resources are used by a network device to send downlink information to a terminal. In one example, the downlink resources may be resources associated with a downlink channel, such as resources associated with a physical downlink control channel (PDCCH).

[0177] In one example, the fourth information is used to indicate the association between uplink resources and beams, such as beam-1 corresponds to CG-1, CG-2, and CG-3, and beam-2 corresponds to CG-4, CG-5, and CG-6.

[0178] In one example, the fourth information is used to indicate the association relationship between the downlink resource and the beam, for example, beam-1 corresponds to PDCCH-1, and beam-2 corresponds to PDCCH-2.

[0179] In some embodiments, the fourth information and the fifth information in step S230 can be carried in the same message and sent, or carried in different messages and sent one after another. The embodiments of the present disclosure do not make specific limitations on this.

[0180] In step S250 , when condition-based mobility is triggered, the terminal determines a first beam.

[0181] In some embodiments, after a certain measurement event (or execution condition) is met, the terminal triggers condition-based mobility. At this time, the terminal performs beam selection for performing RACH-less cell access to select a beam that is more suitable for performing RACH-less cell access.

[0182] In some embodiments, the first beam includes at least one of the following: a second beam among the beams associated with the target cell, a beam whose measurement quality is greater than or equal to a threshold value, any beam associated with the target cell, and a beam associated with a first measurement event, wherein the first measurement event is a measurement event that triggers conditional-based mobility.

[0183] In some embodiments, the first measurement event may also be understood as the first execution condition.

[0184] In some embodiments, the network device configures one or more second beams for RACH-less cell access for the candidate cell in step S210. Then, when condition-based mobility is triggered, the terminal can determine a target cell from the candidate cells. The terminal then selects a second beam associated with the target cell as the first beam. In this case, the first beam is the second beam. In one example, the terminal can select any second beam associated with the target cell as the first beam.

[0185] In some embodiments, the network device configures an associated beam for the candidate cell in step S210. Then, in the case of triggering condition-based mobility, the terminal can determine the target cell from the candidate cell. Then, the terminal performs measurement based on the beam associated with the target cell to obtain the measurement quality of each beam. In some embodiments, when a beam whose measurement quality is greater than or equal to a threshold value is detected, the first beam is determined to be one of the beams (recorded as the third beam) whose measurement quality is greater than or equal to the threshold value. In some embodiments, the terminal selects a beam whose measurement quality is greater than or equal to the threshold value as the first beam based on the measurement quality. At this time, the first beam is a beam whose measurement quality is greater than or equal to the threshold value. In one example, the threshold value can be configured by the network device, can be preset, or can be determined by the terminal based on its own implementation.

[0186] In one example, the terminal may select any one of the third beams whose measurement quality is greater than or equal to a threshold value as the first beam. In this case, the first beam is any one of the third beams. In one example, the terminal may select the beam with the best measurement quality from the third beams whose measurement quality is greater than or equal to the threshold value as the first beam. In this case, the first beam is the beam with the best measurement quality among the third beams. In one example, the terminal may determine the uplink resource (e.g., UL gtant) associated with each third beam and select the beam corresponding to the latest uplink grant as the first beam. In this case, the first beam is the beam associated with the first uplink resource among the multiple third beams, and the first uplink resource is the latest uplink resource among the uplink resources associated with each third beam. In one example, the terminal may determine the downlink resource (e.g., PDCCH) associated with each third beam and select the beam corresponding to the latest PDCCH as the first beam. At this time, the first beam is a beam associated with the first downlink control channel among multiple third beams, and the first downlink control channel is the downlink control channel with the closest time among the downlink control channels associated with each third beam.

[0187] In some embodiments, when no beam with a measurement quality greater than or equal to a threshold value is detected, the terminal determines that the first beam is any beam associated with the target cell. In some embodiments, the terminal determines, based on the beam measurement quality, that no beam with a measurement quality greater than or equal to the threshold value exists. In this case, the terminal may select any beam among the beams associated with the target cell as the first beam.

[0188] In some embodiments, if no beam with measurement quality greater than or equal to a threshold value is detected, the terminal performs cell access using a random access channel. In some embodiments, if the terminal determines, based on beam measurement quality, that no beam with measurement quality greater than or equal to the threshold value is detected, the terminal may choose to perform cell access using a random access channel. In one example, if no beam with measurement quality greater than or equal to the threshold value is detected, the terminal may initiate a random access procedure to access a target cell. In this case, the terminal sends a first message to the network device, where the first message is used for cell access using a random access channel.

[0189] In some embodiments, the network device configures one or more beams for the candidate cell in step S210. Then, when condition-based mobility is triggered, the terminal may determine a target cell from the candidate cells. The terminal then selects any beam associated with the target cell as the first beam. In this case, the first beam is any beam associated with the target cell.

[0190] In some embodiments, the network device configures an associated beam for the candidate cell in step S210. Then, in the case where the first measurement event triggers conditional-based mobility, the terminal can determine the candidate cell corresponding to the first measurement event as the target cell, and then determine the beam associated with the first measurement event (i.e., the beam associated with the target cell, which can also be recorded as the third beam). Next, the terminal performs measurement based on the beam associated with the target cell to obtain the measurement quality of each beam. In some embodiments, when a beam with a measurement quality greater than or equal to a threshold value is detected, the first beam is determined to be one of the beams with a measurement quality greater than or equal to the threshold value (i.e., the third beam). In some embodiments, the terminal selects a beam with a measurement quality greater than or equal to the threshold value as the first beam based on the measurement quality. At this time, the first beam is a beam with a measurement quality greater than or equal to the threshold value. In one example, the threshold value can be configured by the network device, or it can be preset, or it can be determined by the terminal based on its own implementation.

[0191] In one example, the terminal may select any one of the third beams whose measurement quality is greater than or equal to a threshold value as the first beam. In this case, the first beam is any one of the third beams. In one example, the terminal may select the beam with the best measurement quality from the third beams whose measurement quality is greater than or equal to the threshold value as the first beam. In this case, the first beam is the beam with the best measurement quality among the third beams. In one example, the terminal may determine the uplink resource (e.g., UL gtant) associated with each third beam and select the beam corresponding to the latest uplink grant as the first beam. In this case, the first beam is the beam associated with the first uplink resource among the multiple third beams, and the first uplink resource is the latest uplink resource among the uplink resources associated with each third beam. In one example, the terminal may determine the downlink resource (e.g., PDCCH) associated with each third beam and select the beam corresponding to the latest PDCCH as the first beam. At this time, the first beam is a beam associated with the first downlink control channel among multiple third beams, and the first downlink control channel is the downlink control channel with the closest time among the downlink control channels associated with each third beam.

[0192] In one example, the network device configures the event that triggers C-LTM as measurement event 1. Measurement event 1 corresponds to target cell 1, which is associated with beam 1 (e.g., TCI-state 1). If measurement event 1 triggers C-LTM, and the measurement result of beam 1 is greater than or equal to a threshold, the terminal may select beam 1 as the first beam.

[0193] In some embodiments, the "measurement quality" may be indicated by at least one of the following parameters: reference signal received power (RSRP), reference signal received quality (RSRQ), and signal to interference and noise ratio (SINR). Of course, the measurement quality may also be indicated by other parameters, which are not specifically limited in the embodiments of the present disclosure.

[0194] In step S260, the terminal determines uplink resources based on the first beam.

[0195] In some embodiments, after determining the first beam, the terminal determines the uplink resources associated with the first beam according to the association relationship between the uplink resources and / or downlink resources and the beam indicated by the fourth information in step S240.

[0196] In some embodiments, when the fourth information indicates an association between uplink resources and beams, the terminal may select the uplink resources corresponding to the first beam as the uplink resources for RACH-less cell access. In one example, the network device configures Beam-1 to be associated with CG-1 and Beam-2 to be associated with CG-2 via RRC signaling. After selecting Beam-1, the terminal determines that CG-1 is selected for transmitting uplink information.

[0197] In some embodiments, when the fourth information indicates an association between a downlink resource (such as a downlink control channel) and a beam, the terminal may select the second downlink control channel corresponding to the first beam, and further determine the uplink resource indicated by the second downlink control channel as the uplink resource for performing RACH-less cell access. In one example, the network device configures beam-1 associated with PDCCH-1 and beam-2 associated with PDCCH-2 through RRC signaling. Then, after the terminal selects beam-1, the terminal may determine to select DG-1 indicated by PDCCH-1 to send uplink information.

[0198] In step S270, the terminal sends uplink information on the uplink resource.

[0199] In some embodiments, the network device receives uplink information on an uplink resource.

[0200] In some embodiments, after determining the uplink resource for accessing the cell performing RACH-less, the terminal may send uplink information on the uplink resource.

[0201] In some embodiments, when uplink resources are configured via RRC signaling, the terminal can transmit uplink information on the uplink resources corresponding to the first beam. In one example, the network device configures Beam-1 to be associated with CG-1 and Beam-2 to be associated with CG-2 via RRC signaling. After selecting Beam-1, the terminal transmits uplink information on CG-1.

[0202] In some embodiments, when the uplink resource is indicated by PDCCH, the terminal can monitor the downlink control channel corresponding to the first beam (i.e., the second control channel). In some embodiments, the terminal can also send uplink information on the uplink resource indicated by the second control channel. In one example, the network device configures beam-1 associated with PDCCH-1 and beam-2 associated with PDCCH-2 through RRC signaling. Then, after the terminal selects beam-1, the terminal can monitor PDCCH-1. Furthermore, the terminal can also send uplink information on DG-1 indicated by PDCCH-1.

[0203] In some embodiments, the terminal may send first information indicating a first beam. In this way, the terminal indicates to the network device the first beam selected for performing RACH-less cell access, so that the network device can receive uplink information based on the first beam to perform RACH-less cell access with the terminal.

[0204] In some embodiments, the first information and the uplink information may be carried in the same message and sent, or carried in different messages and sent one after another. This embodiment of the present disclosure does not specifically limit this.

[0205] In some embodiments, the terminal may not send the first information. In this case, the network device may determine the first beam through the received uplink information.

[0206] In step S280 , the network device sends second information based on the first beam.

[0207] In some embodiments, the terminal receives second information based on the first beam. The second information is used to indicate that the RACH-less cell access is successfully executed. In some embodiments, after receiving the second information, the terminal confirms that the RACH-less cell access is successfully executed.

[0208] In some embodiments, the network device transmits the second information in a downlink channel corresponding to the first beam. In one example, the downlink channel corresponding to the first beam may include a PDCCH, a PDSCH, etc. In one example, the second information may include control signaling, RRC signaling, MAC CE, etc. transmitted in the PDCCH or PDSCH.

[0209] In some embodiments, the terminal monitors a downlink channel corresponding to the first beam to receive second information sent by the network device.

[0210] In some embodiments, the second information may include at least one of downlink data and downlink control information. The downlink control information is used to schedule uplink information.

[0211] In some embodiments, the second information may also be an acknowledgement of the uplink information. In this case, the second information indicates an acknowledgment of receipt of the uplink information. In one example, the network device transmits the second information on the downlink channel (e.g., PDCCH) corresponding to the first beam selected by the terminal to indicate that the network device has received the uplink information. In one example, the second information may carry a terminal identifier, such as a C-RNTI identifier.

[0212] In some embodiments, in step S210, the network device may further configure a measurement gap (MG) for the terminal's conditional mobility. In this case, the configuration information may further include the measurement gap. In one example, the measurement gap is periodic, such as 10ms or 20ms. In another example, the terminal may perform inter-frequency measurements within the measurement gap.

[0213] In some embodiments, when the network device configures a measurement interval for the conditional-based mobility of the terminal, after triggering RACH-less cell access (i.e., executing step S270), the terminal can continue to monitor the downlink control channel corresponding to the first beam (i.e., the second control channel) within the measurement interval.

[0214] In some embodiments, the terminal monitoring the downlink control channel may include at least one of the following: monitoring a downlink control channel for sending dynamic scheduling resources, and monitoring a downlink control channel for receiving feedback information from a network device.

[0215] In one example, after triggering RACH-less cell access, the terminal may start a timer and monitor the downlink control channel, such as a downlink control channel for sending dynamically scheduled resources, during the timer's running period.

[0216] In one example, after triggering RACH-less cell access and after sending uplink data, the terminal may start a timer and monitor the downlink control channel, such as a downlink control channel used to receive feedback information from a network device, during the timer's execution. In one example, sending uplink data may be understood as the terminal sending uplink data for the first time after triggering RACH-less cell access, or may be understood as the terminal sending uplink data after triggering RACH-less cell access.

[0217] It should be noted that the above steps S250 to S280 are a RACH-less cell access process.

[0218] Thus, when condition-based mobility is triggered, the terminal performs beam selection for RACH-less cell access to select a more appropriate beam, thereby reducing the probability of cell access failure.

[0219] The communication method involved in the embodiments of the present disclosure may include at least one of steps S210 to S280. For example, step S210 can be implemented as an independent embodiment. For example, step S230 can be implemented as an independent embodiment. For example, step S240 can be implemented as an independent embodiment. For example, steps S230 and S240 can be implemented as independent embodiments. For example, steps S210, S230, and S240 can be implemented as independent embodiments. For example, steps S210 and S220 can be implemented as independent embodiments. For example, steps S220 and S230 can be implemented as independent embodiments. For example, steps S220 and S240 can be implemented as independent embodiments. For example, steps S220 to S240 can be implemented as independent embodiments. For example, steps S210 to S240 can be implemented as independent embodiments. For example, step S250 can be implemented as an independent embodiment. For example, steps S250 to S270 can be implemented as independent embodiments. For example, steps S250 to S280 can be implemented as independent embodiments. For example, steps S210 and S250 can be implemented as independent embodiments. For example, steps S230 and S250 can be implemented as independent embodiments. For example, steps S240 and S250 can be implemented as independent embodiments. For example, steps S230 to S250 can be implemented as independent embodiments. For example, steps S210, S230 to S250 can be implemented as independent embodiments. For example, steps S210, S220, and S250 can be implemented as independent embodiments. For example, steps S220, S230, and S250 can be implemented as independent embodiments. For example, steps S220, S240, and S250 can be implemented as independent embodiments. For example, steps S220 to S250 can be implemented as independent embodiments. For example, steps S210 to S250 can be implemented as independent embodiments. For example, steps S210 and steps S250 to S270 can be implemented as independent embodiments. For example, steps S230 and steps S250 to S270 can be implemented as independent embodiments. For example, steps S240 to S270 can be implemented as independent embodiments. For example, steps S230 to S270 can be implemented as independent embodiments. For example, steps S210, steps S230 to S270 can be implemented as independent embodiments. For example, steps S210, steps S220, and steps S250 to S270 can be implemented as independent embodiments. For example, steps S220, steps S230, and steps S250 to S270 can be implemented as independent embodiments. For example, steps S220, steps S240 to S270 can be implemented as independent embodiments.For example, steps S220 to S270 can be implemented as independent embodiments. For example, steps S210 to S270 can be implemented as independent embodiments. For example, steps S210 and steps S250 to S280 can be implemented as independent embodiments. For example, steps S230 and steps S250 to S280 can be implemented as independent embodiments. For example, steps S240 to S280 can be implemented as independent embodiments. For example, steps S230 to S280 can be implemented as independent embodiments. For example, steps S210, steps S230 to S280 can be implemented as independent embodiments. For example, steps S210, steps S220, and steps S250 to S280 can be implemented as independent embodiments. For example, steps S220, steps S230, and steps S250 to S280 can be implemented as independent embodiments. For example, steps S220 and S240 to S280 can be implemented as independent embodiments. For example, steps S220 to S280 can be implemented as independent embodiments. For example, steps S210 to S280 can be implemented as independent embodiments.

[0220] In some embodiments, step S210 , step S220 , step S230 and step S240 may be executed in an interchangeable order or simultaneously.

[0221] In some embodiments, step S220 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0222] In some embodiments, step S280 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0223] In some embodiments, the names of information, etc. are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "codeword", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0224] In some embodiments, terms such as "uplink", "uplink", "physical uplink" can be interchangeable with each other, and terms such as "downlink", "downlink", "physical downlink" can be interchangeable with each other, and terms such as "side", "sidelink", "side communication", "sidelink communication", "direct connection", "direct link", "direct communication", "direct link communication" can be interchangeable with each other.

[0225] In some embodiments, the terms "downlink control information (DCI)", "downlink (DL) assignment", "DCI", "uplink (UL) grant" and the like may be used interchangeably.

[0226] In some embodiments, terms such as "physical downlink shared channel (PDSCH)" and "DL data" can be used interchangeably, and terms such as "physical uplink shared channel (PUSCH)" and "UL data" can be used interchangeably.

[0227] 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.

[0228] In some embodiments, "obtain", "get", "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 higher layers, obtaining by self-processing, autonomous implementation, etc.

[0229] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0230] In some embodiments, terms such as "certain", "preset", "preset", "setting", "indicated", "a certain", "any", and "first" can be interchangeable. "Specific A", "preset A", "preset A", "setting A", "indicated A", "a certain A", "any A", and "first A" can be interpreted as A pre-specified in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., or as specific A, a certain A, any A, or first A, etc., but not limited to this.

[0231] In some embodiments, the determination or judgment can be performed by a value represented by 1 bit (0 or 1), or by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a predetermined value), but is not limited thereto.

[0232] Figure 3A is a flow chart illustrating a terminal-side communication method according to an embodiment of the present disclosure. As shown in Figure 3A, the present disclosure embodiment relates to a communication method executed by a terminal in the above-mentioned communication system. The above-mentioned method includes steps S3110 to S3180.

[0233] In step S3110, configuration information is received.

[0234] The optional implementation of step S3110 can refer to the optional implementation of step S210 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0235] In some embodiments, the terminal receives configuration information sent by a network device, but is not limited thereto and may also receive configuration information sent by other entities.

[0236] In step S3120, third information is received.

[0237] The optional implementation of step S3120 can refer to the optional implementation of step S220 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0238] In some embodiments, the terminal receives the third information sent by the network device, but is not limited thereto, and may also receive the third information sent by other entities.

[0239] In some embodiments, step S3120 may be omitted. In this case, the terminal determines whether to perform RACH-less cell access when conditional-based mobility is triggered according to protocol provisions or its own implementation.

[0240] In step S3130, the fifth information is received.

[0241] The optional implementation of step S3130 can refer to the optional implementation of step S230 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0242] In some embodiments, the terminal receives the fifth information sent by the network device, but is not limited thereto, and may also receive the fifth information sent by other entities.

[0243] In step S3140, fourth information is received.

[0244] The optional implementation of step S3140 can refer to the optional implementation of step S240 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0245] In some embodiments, the terminal receives the fourth information sent by the network device, but is not limited thereto, and may also receive the fourth information sent by other entities.

[0246] In step S3150 , when condition-based mobility is triggered, a first beam is determined.

[0247] The optional implementation of step S3150 can refer to the optional implementation of step S250 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0248] In step S3160, uplink resources are determined based on the first beam.

[0249] The optional implementation of step S3160 can refer to the optional implementation of step S260 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0250] In step S3170, uplink information is sent on uplink resources.

[0251] The optional implementation of step S3170 can refer to the optional implementation of step S270 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0252] In some embodiments, the terminal sends uplink information to the network device on the uplink resource, but is not limited thereto, and the terminal may also send uplink information to other entities on the uplink resource.

[0253] In step S3180, second information is received based on the first beam.

[0254] The optional implementation of step S3180 can refer to the optional implementation of step S280 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0255] In some embodiments, the terminal receives the second information sent by the network device, but is not limited thereto, and may also receive the second information sent by other entities.

[0256] The communication method involved in the embodiments of the present disclosure may include at least one of steps S3110 to S3180. For example, step S3110 can be implemented as an independent embodiment. For example, step S3130 can be implemented as an independent embodiment. For example, step S3140 can be implemented as an independent embodiment. For example, steps S3130 and S3140 can be implemented as independent embodiments. For example, steps S3110, S3130, and S3140 can be implemented as independent embodiments. For example, steps S3110 and S3120 can be implemented as independent embodiments. For example, steps S3120 and S3130 can be implemented as independent embodiments. For example, steps S3120 and S3140 can be implemented as independent embodiments. For example, steps S3120 to S3140 can be implemented as independent embodiments. For example, steps S3110 to S3140 can be implemented as independent embodiments. For example, step S3150 can be implemented as an independent embodiment. For example, steps S3150 to S3170 can be implemented as independent embodiments. For example, steps S3150 to S3180 can be implemented as independent embodiments. For example, steps S3110 and S3150 can be implemented as independent embodiments. For example, steps S3130 and S3150 can be implemented as independent embodiments. For example, steps S3140 and S3150 can be implemented as independent embodiments. For example, steps S3130 to S3150 can be implemented as independent embodiments. For example, steps S3110, S3130 to S3150 can be implemented as independent embodiments. For example, steps S3110, S3120, and S3150 can be implemented as independent embodiments. For example, steps S3120, S3130, and S3150 can be implemented as independent embodiments. For example, steps S3120, S3140, and S3150 can be implemented as independent embodiments. For example, steps S3120 to S3150 can be implemented as independent embodiments. For example, steps S3110 to S3150 can be implemented as independent embodiments. For example, steps S3110 and S3150 to S3170 can be implemented as independent embodiments. For example, steps S3130 and S3150 to S3170 can be implemented as independent embodiments. For example, steps S3140 to S3170 can be implemented as independent embodiments. For example, steps S3130 to S3170 can be implemented as independent embodiments. For example, steps S3110, S3130 to S3170 can be implemented as independent embodiments. For example, steps S3110, S3120, and S3150 to S3170 can be implemented as independent embodiments.For example, steps S3120, S3130, and S3150 to S3170 can be implemented as independent embodiments. For example, steps S3120 and S3140 to S3170 can be implemented as independent embodiments. For example, steps S3120 to S3170 can be implemented as independent embodiments. For example, steps S3110 to S3170 can be implemented as independent embodiments. For example, steps S3110 and S3150 to S3180 can be implemented as independent embodiments. For example, steps S3130 and S3150 to S3180 can be implemented as independent embodiments. For example, steps S3140 to S3180 can be implemented as independent embodiments. For example, steps S3130 to S3180 can be implemented as independent embodiments. For example, steps S3110 and S3130 to S3180 can be implemented as independent embodiments. For example, steps S3110, S3120, and S3150 to S3180 can be implemented as independent embodiments. For example, steps S3120, S3130, and S3150 to S3180 can be implemented as independent embodiments. For example, steps S3120, S3140 to S3180 can be implemented as independent embodiments. For example, steps S3120 to S3180 can be implemented as independent embodiments. For example, steps S3110 to S3180 can be implemented as independent embodiments.

[0257] In some embodiments, step S3110 , step S3120 , step S3130 and step S3140 may be executed in an interchangeable order or simultaneously.

[0258] In some embodiments, step S3120 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0259] In some embodiments, step S3180 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0260] Figure 3B is a flow chart illustrating a communication method on a network device side according to an embodiment of the present disclosure. As shown in Figure 3B, the present disclosure embodiment relates to a communication method, which is executed by a network device in the above-mentioned communication system. The above-mentioned method includes steps S3210 to S3260.

[0261] In step S3210, configuration information is sent.

[0262] The optional implementation of step S3210 can refer to the optional implementation of step S210 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0263] In some embodiments, the network device sends configuration information to the terminal, but is not limited thereto and may also send configuration information to other entities.

[0264] In step S3220, the third information is sent.

[0265] The optional implementation of step S3220 can refer to the optional implementation of step S220 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0266] In some embodiments, the network device sends the third information to the terminal, but is not limited thereto, and the third information may also be sent to other entities.

[0267] In some embodiments, step S3120 may be omitted. In this case, the terminal determines whether to perform RACH-less cell access when conditional-based mobility is triggered according to protocol provisions or its own implementation.

[0268] In step S3230, the fifth information is sent.

[0269] The optional implementation of step S3230 can refer to the optional implementation of step S230 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0270] In some embodiments, the network device sends the fifth information to the terminal, but is not limited thereto, and the fifth information may also be sent to other entities.

[0271] In step S3240, the fourth information is sent.

[0272] The optional implementation of step S3240 can refer to the optional implementation of step S240 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0273] In some embodiments, the network device sends the fourth information to the terminal, but is not limited thereto, and the fourth information may also be sent to other entities.

[0274] In step S3250, uplink information is received on uplink resources.

[0275] The optional implementation of step S3250 can refer to the optional implementation of step S270 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0276] In some embodiments, the network device receives uplink information sent by the terminal on the uplink resource, but is not limited thereto, and may also receive uplink information sent by other entities on the uplink resource.

[0277] In step S3260, second information is sent based on the first beam.

[0278] The optional implementation of step S3260 can refer to the optional implementation of step S280 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0279] In some embodiments, the network device sends downlink information to the terminal, but is not limited thereto, and may also send downlink information to other entities.

[0280] The communication method involved in the embodiments of the present disclosure may include at least one of steps S3210 to S3260. For example, step S3210 can be implemented as an independent embodiment. For example, step S3230 can be implemented as an independent embodiment. For example, step S3240 can be implemented as an independent embodiment. For example, steps S3230 and S3240 can be implemented as independent embodiments. For example, steps S3210, S3230, and S3240 can be implemented as independent embodiments. For example, steps S3210 and S3220 can be implemented as independent embodiments. For example, steps S3220 and S3230 can be implemented as independent embodiments. For example, steps S3220 and S3240 can be implemented as independent embodiments. For example, steps S3220 to S3240 can be implemented as independent embodiments. For example, steps S3210 to S3240 can be implemented as independent embodiments. For example, step S3250 can be implemented as an independent embodiment. For example, step S3260 can be implemented as an independent embodiment. For example, steps S3210 and S3250 can be implemented as independent embodiments. For example, steps S3230 and S3250 can be implemented as independent embodiments. For example, steps S3240 and S3250 can be implemented as independent embodiments. For example, steps S3230 to S3250 can be implemented as independent embodiments. For example, steps S3210, S3230 to S3250 can be implemented as independent embodiments. For example, steps S3210, S3220, and S3250 can be implemented as independent embodiments. For example, steps S3220, S3230, and S3250 can be implemented as independent embodiments. For example, steps S3220, S3240, and S3250 can be implemented as independent embodiments. For example, steps S3220 to S3250 can be implemented as independent embodiments. For example, steps S3210 to S3250 can be implemented as independent embodiments. For example, steps S3210 and steps S3250 to S3260 can be implemented as independent embodiments. For example, steps S3230 and steps S3250 to S3260 can be implemented as independent embodiments. For example, steps S3240 to S3260 can be implemented as independent embodiments. For example, steps S3230 to S3260 can be implemented as independent embodiments. For example, steps S3210, steps S3230 to S3260 can be implemented as independent embodiments. For example, steps S3210, steps S3220, and steps S3250 to S3260 can be implemented as independent embodiments. For example, step S3220, step S3230, and steps S3250 to S3260 may be implemented as independent embodiments.For example, steps S3220 and S3240 to S3260 can be implemented as independent embodiments. For example, steps S3220 to S3260 can be implemented as independent embodiments. For example, steps S3210 to S3260 can be implemented as independent embodiments.

[0281] In some embodiments, step S3210, step S3220, step S3230 and step S3240 may be executed in an interchangeable order or simultaneously.

[0282] In some embodiments, step S3220 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0283] In some embodiments, step S3260 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0284] Figure 4A is a flow chart illustrating a terminal-side communication method according to an embodiment of the present disclosure. As shown in Figure 4A, the present disclosure embodiment relates to a communication method executed by a terminal in the above-mentioned communication system. The above-mentioned method includes steps S4110 to S4120.

[0285] In step S4110 , when condition-based mobility is triggered, a first beam is determined.

[0286] The optional implementation of step S4110 can refer to the optional implementation of step S250 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0287] In step S4120, RACH-less cell access is performed based on the first beam.

[0288] The optional implementation of step S4120 can refer to the optional implementation of steps S260 to S280 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0289] FIG4B is a flow chart illustrating a communication method on a network device side according to an embodiment of the present disclosure. As shown in FIG4B , the present disclosure embodiment relates to a communication method executed by a network device in the above communication system. The method includes step S4210.

[0290] In step S4210, uplink information is received based on the first beam.

[0291] The optional implementation of step S4210 can refer to the optional implementation of step S270 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0292] In an embodiment of the present disclosure, when a conditionally triggered mobility process is triggered, the terminal can perform beam selection for performing cell access without a random access channel, and perform cell access without a random access channel based on the beam, thereby reducing the probability of cell access failure.

[0293] The present disclosure also provides a communication method, which is performed by the above-mentioned communication system. The communication method may include the following steps:

[0294] Step 1: The network side configures the terminal with a "mobility process based on conditional triggering".

[0295] The type of the "condition-triggered mobility process" includes at least one of the following: CHO, CPA, CPC, and CLTM.

[0296] In some embodiments, the network side configuration or protocol stipulates whether the terminal adopts the "RACH-less access procedure" (such as the third information) when triggering a specific "condition-triggered mobility procedure". In one example, when the terminal meets a specific measurement event (such as the quality of the serving cell is lower than the threshold value, and the quality of the target cell is higher than the threshold value), the terminal triggers the mobility procedure for cell 1. The TA value of the target cell is known to the terminal (such as the target cell TA value obtained by advance indication by the network or self-calculation by the terminal), then the terminal adopts the "RACH-less access procedure" for the mobility procedure of cell 1.

[0297] In some embodiments, for a "RACH-less access procedure" of a specific cell, uplink resources (e.g., uplink grant) of the terminal in the "RACH-less access procedure" of the specific cell are provided to the terminal in at least one of the following ways:

[0298] Uplink resource configuration mode 1: resources configured by RRC (eg, Configured Grant Type-1).

[0299] Uplink resource configuration mode 2: resources indicated by PDCCH (eg, Dynamic Grant indicated by DCI).

[0300] In some embodiments, for uplink resource configuration mode 1, the network side can configure the correspondence between uplink resources and beams for the "RACH-less access process" of a specific cell. In one example, Beam-1 corresponds to CG-1 / 2 / 3, and Beam-2 corresponds to CG-4 / 5 / 6.

[0301] In some embodiments, for uplink resource configuration mode 2, the network side can configure the correspondence between downlink resources and beams for the "RACH-less access process" of the specific cell. In one example, beam-1 corresponds to PDCCH-1, and beam-2 corresponds to PDCCH-2.

[0302] In some embodiments, for the above method, the identification method of the "beam" includes any of the following: spatial relationship identification, reference signal identification. In one example, the spatial relationship identification can be a TCI state identification, and the reference signal identification can be an SSB identification, a CSI-RS identification, etc.

[0303] Step 2: The terminal triggers a "mobility process based on conditional triggering", and the mobility process adopts a "RACH-less access process".

[0304] In the "RACH-less access process", the terminal selects a specific beam for access. The specific beam selection method includes any one of the following methods 1 to 4.

[0305] Method 1: The terminal selects a configured specific beam (for example, when the network side provides a "candidate configuration for LTM" (or "candidate configuration for CHO"), it indicates the specific beam to be used when accessing the target cell (such as PCell or PSCell) of the candidate configuration. Then, when the terminal uses the "RACH-less access procedure" to access the target cell, it selects the specific beam configured by the network for access)

[0306] In some embodiments, based on Method 1, Method 1.1: For uplink resource configuration mode 1, after the terminal selects a specific beam, it uses the uplink resources corresponding to that specific beam for signal transmission. In one example, the network-side RRC message configures Beam-1 to be associated with CG-1 and Beam-2 to be associated with CG-2. After the terminal selects Beam-1, it uses CG-1 to transmit uplink data.

[0307] In some embodiments, based on Method 1, Method 1.2: For uplink resource configuration mode 2, after the terminal selects a specific beam, the terminal monitors the specific downlink control channel corresponding to the specific beam and uses the uplink resources indicated by the specific downlink control channel to transmit signals. In one example, the RRC message on the network side configures Beam-1 to be associated with PDCCH-1 and Beam-2 to be associated with PDCCH-2. After the terminal selects Beam-1, the terminal monitors PDCCH-1 and uses the uplink grant indicated by PDCCH-1 to transmit uplink data.

[0308] Method 2: The terminal selects a beam whose measurement quality is greater than or equal to a threshold value (e.g., the measurement result corresponding to the beam selected when the terminal accesses the target cell using the "RACH-less access procedure" is configured on the network side or agreed upon in the protocol). In one example, RSRP, RSRQ, or SINR must be greater than or equal to the threshold value configured on the network side or agreed upon in the protocol.

[0309] In some embodiments, based on method 2, method 2.1: same as method 1.1.

[0310] In some embodiments, based on Method 2, Method 2.2: Same as Method 1.2.

[0311] Method 3: The terminal selects any beam.

[0312] In some embodiments, based on Method 3, Method 3.1: Same as Method 1.1.

[0313] In some embodiments, based on method 3, method 3.2: same as method 1.2.

[0314] Method 4: The terminal selects the beam corresponding to the measurement event that triggers the mobility process. In one example, the network configures the event that triggers C-LTM as measurement event-1. The measurement result of beam-1 of target cell-1 associated with measurement event-1 (such as the RSRP measurement value of TCI-state-1 or SSB-1) is greater than or equal to the threshold value. When the terminal meets the condition that measurement event-1 triggers the C-LTM process, the beam selected by the terminal is beam-1 of target cell-1 corresponding to measurement event-1.

[0315] In some embodiments, for method 2 or method 4, when there are multiple beams whose measurement quality is greater than or equal to the threshold value or there are multiple beams that meet the measurement event, the terminal selects a specific beam in a manner including at least one of the following:

[0316] Method 1: The terminal selects any beam.

[0317] Method 2: The terminal selects a beam with the best measurement quality.

[0318] In some embodiments, for multiple beams whose measurement quality is greater than or equal to a threshold value, the terminal selects any one beam.

[0319] In some embodiments, for multiple beams whose measurement quality is greater than or equal to a threshold, the terminal selects a beam with the best measurement quality (eg, the highest RSRP / RSRQ / SINR).

[0320] In some embodiments, for a plurality of beams whose measurement quality is greater than or equal to a threshold value:

[0321] For uplink resource configuration mode 1, for multiple uplink grants corresponding to the multiple beams, the terminal selects the "latest uplink grant" (such as the latest UL grant) and selects the beam corresponding to the "latest uplink grant".

[0322] For uplink resource configuration mode 2, for multiple downlink control channels corresponding to the multiple beams (such as multiple PDCCH monitoring positions), the terminal selects the "downlink control channel closest in time" (such as the latest PDCCH) and selects the beam corresponding to the "downlink control channel closest in time".

[0323] In some embodiments, for method 2, when the terminal does not detect that the measurement quality corresponding to the beam is greater than or equal to the threshold value, the terminal's behavior includes any one of the following: the terminal selects any beam, and the terminal adopts a random access process.

[0324] Step 3: According to step 2, the terminal adopts the "RACH-less access process", selects a specific beam, and selects the uplink resources corresponding to the specific beam to send data.

[0325] In some embodiments, the terminal may indicate its selected beam information to the network side. The "beam information" is the same as the "beam" identifier above. In one example, the TCI state identifier used is indicated to the network through a MAC CE or RRC message.

[0326] Step 4: The network side determines the beam used by the terminal based on the uplink signal sent by the terminal, and uses the beam to send downlink signals or schedule uplink signals.

[0327] In one example, the network sends confirmation information on the downlink channel (e.g., PDCCH) corresponding to the beam selected by the terminal, indicating that the network device has confirmed receipt of the terminal's uplink signal. In one example, the confirmation information can be control signaling carrying the terminal's identifier (e.g., PDCCH or PDSCH with a C-RNTI identifier, or a MAC CE or RRC message carrying the C-RNTI).

[0328] Step 5: The terminal monitors the network-side feedback signal (e.g., PDCCH) on the downlink channel corresponding to the beam selected in Step 1. Based on the confirmation information sent by the network device received in Step 4, the terminal confirms that the access process is successfully completed (e.g., the RACH-less access process is successfully completed).

[0329] In some embodiments, when the terminal is performing conditional mobility, if the measurement interval function is activated, the terminal may continue to monitor the downlink control channel within the activated measurement interval. In some embodiments, the conditional mobility process may be a RACH-less conditional mobility process. For the RACH-less conditional mobility process, the monitoring interval of the downlink control channel includes at least one of the following: a downlink control channel for sending dynamically scheduled resources (such as after the terminal triggers the RACH-less conditional mobility process, it starts a timer and monitors the downlink control channel during the timer is running); a downlink control channel for receiving network feedback (such as after the terminal triggers the RACH-less conditional mobility process, the terminal starts a timer after sending uplink data (for the first time) and monitors the downlink control channel during the timer is running).

[0330] In some embodiments, the above method may include the method described in the above embodiments on the communication system side, terminal side and network device side, which will not be repeated here.

[0331] The embodiments of the present disclosure further provide a communication device for implementing any of the above methods. For example, a terminal is provided, including units or modules for implementing each step performed by the terminal in any of the above methods. For another example, another network device is provided, including units or modules for implementing each step performed by the network device in any of the above methods.

[0332] It should be understood that the division of the various units or modules in the above communication device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a single physical entity, or they may be physically separated. In addition, the units or modules in the communication device may be implemented in the form of a processor calling software: for example, the communication device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules in the communication device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the communication device or a memory outside the communication device. Alternatively, the units or modules in the communication device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units or modules by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above communication device can be realized in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the remaining part by the form of hardware circuits.

[0333] In the embodiments of the present disclosure, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution capabilities, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationship of the hardware circuit. The logical relationship of the above-mentioned hardware circuit is fixed or reconfigurable. For example, the processor is a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and implementing the hardware circuit configuration can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0334] As shown in Figure 5A, Figure 5A is a schematic diagram of the structure of a terminal shown in an embodiment of the present disclosure. The structure of the terminal 51 can be as shown in Figure 5A. The terminal 51 includes: a first processing module 5101 and a first transceiver module 5102. In some embodiments, the first transceiver module 5102 is used to perform cell access without a random access channel based on the first beam. Optionally, the first transceiver module 5102 is used to perform at least one of the communication steps such as sending and / or receiving performed by the first device in any of the above methods (for example, step S210, step S220, step S230, step S240, step S270, step S280, but not limited thereto), which are not described in detail here. Optionally, the terminal 51 may also include: a first processing module 5101. In some embodiments, the first processing module 5101 is used to perform at least one of the other steps (for example, step S250, step S260, but not limited thereto) performed by the first device in any of the above methods, which are not described in detail here.

[0335] As shown in Figure 5B, Figure 5B is another structural diagram of the network device shown in an embodiment of the present disclosure. The structure of the above-mentioned network device 52 can be as shown in Figure 5B. The network device 52 may include: a second transceiver module 5201. In some embodiments, the second transceiver module 5201 is used to receive uplink information based on a first beam, wherein the first beam is determined by the terminal for performing cell access without a random access channel when condition-based mobility is triggered. Optionally, the above-mentioned second transceiver module 5201 is used to perform at least one of the communication steps such as sending and / or receiving (for example, step S210, step S220, step S230, step S240, step S270, step S280, but not limited to this) performed by the network device in any of the above methods, which will not be repeated here.

[0336] In some embodiments, the transceiver module may include a first transceiver module 5102 and / or a second transceiver module 5201. The first transceiver module 5102 and the second transceiver module 5201 may be separate or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

[0337] As shown in Figure 6A, Figure 6A is a schematic diagram of the structure of a communication device shown in an embodiment of the present disclosure. Communication device 61 can be a terminal, a network device (such as an access network device), a chip, a chip system, or a processor that supports a terminal to implement any of the above methods, or a chip, a chip system, or a processor that supports a network device to implement any of the above methods. Communication device 61 can be used to implement the method described in the above method embodiment. For details, please refer to the description of the above method embodiment.

[0338] As shown in FIG6A , the communication device 61 includes one or more processors 6101. The processor 6101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process the communication protocol and communication data, and the central processing unit can be used to control the first device (such as an environmental IoT device) and / or the second device (such as a base station, baseband chip, terminal, terminal chip, DU or CU, etc.), execute programs, and process program data.

[0339] In some embodiments, the communication device 61 further includes one or more transceivers 6102. When the communication device 61 includes one or more transceivers 6102, the transceiver 6102 performs at least one of the communication steps (e.g., step S210, step S220, step S230, step S240, step S270, and step S280, but not limited thereto) of the sending and / or receiving in the above method. The processor 6101 performs at least one of the other steps (e.g., step S250 and step S260, but not limited thereto). In an optional embodiment, the transceiver may include a receiver and / or a transmitter, and the receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, and interface may be interchangeable, the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be interchangeable, and the terms receiver, receiving unit, receiver, and receiving circuit may be interchangeable.

[0340] In some embodiments, the communication device 61 also includes one or more memories 6103 for storing data. Alternatively, all or part of the memories 6103 may be located outside the communication device 61. In alternative embodiments, the communication device 61 may include one or more interface circuits 6104. Optionally, the interface circuits 6104 are connected to the memories 6103 and can be used to receive data from the memories 6103 or other devices, or to send data to the memories 6103 or other devices. For example, the interface circuits 6104 can read data stored in the memories 6103 and send the data to the processor 6101.

[0341] The communication device 61 described in the above embodiment may be a terminal or a network device, but the scope of the communication device 61 described in the present disclosure is not limited thereto, and the structure of the communication device 61 may not be limited by FIG. 6A. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data or programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, an environmental Internet of Things device, etc.; (6) others, etc.

[0342] As shown in Figure 6B, Figure 6B is a schematic diagram of a chip structure shown in an embodiment of the present disclosure. If the communication device 61 can be a chip or a chip system, please refer to the schematic diagram of the chip structure 62 shown in Figure 6B, but it is not limited thereto.

[0343] In some embodiments, chip 62 may include one or more processors 6201 .

[0344] In some embodiments, chip 62 may further include one or more interface circuits 6202. Terms such as interface circuit, interface, and transceiver pins may be used interchangeably. In some embodiments, chip 62 may further include one or more memories 6203 for storing data. Alternatively, all or part of memory 6203 may be located external to chip 62. Optionally, interface circuit 6202 is connected to memory 6203 and may be configured to receive data from memory 6203 or other devices, or to send data to memory 6203 or other devices. For example, interface circuit 6202 may read data stored in memory 6203 and send the data to processor 6201.

[0345] In some embodiments, the interface circuit 6202 performs at least one of the communication steps (e.g., steps S210, S220, S230, S240, S270, and S280) of the aforementioned method. For example, the interface circuit 6202 performing the communication steps (e.g., steps S210, S220, S230, S240, S270, and S280) of the aforementioned method means that the interface circuit 6202 performs data exchange between the processor 6201, the chip 62, the memory 6203, or the transceiver device. In some embodiments, the processor 6201 performs at least one of the other steps (e.g., steps S250 and S260, but not limited thereto).

[0346] The embodiment of the present disclosure further provides a storage medium having instructions stored thereon. When the instructions are executed on the communication device 61, the communication device 61 is caused to execute 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 thereto and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto and may also be a transient storage medium.

[0347] The embodiment of the present disclosure further provides a program product, which, when executed by the communication device 61, enables the communication device 61 to perform any of the above methods. Optionally, the program product is a computer program product.

[0348] The embodiments of the present disclosure also provide a computer program, which, when executed on a computer, enables the computer to execute any one of the above methods.

[0349] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. The embodiments disclosed herein are intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed in the embodiments disclosed herein. The specification and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0350] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A communication method, performed by a terminal, comprising: In case condition-based mobility is triggered, determining a first beam; Based on the first beam, cell access without a random access channel is performed.

2. The method according to claim 1, wherein The first beam includes at least one of the following: a second beam among beams associated with a target cell, where the target cell is a target cell to which the terminal is to be handed over in condition-based mobility; Beams whose measurement quality is greater than or equal to the threshold value; Any beam associated with a target cell, where the target cell is the target cell to which the terminal is to be handed over in condition-based mobility; A beam associated with a first measurement event, wherein the first measurement event is a measurement event that triggers the condition-based mobility.

3. The method according to claim 1 or 2, wherein: The first beam is one of multiple third beams, and the third beam includes at least one of the following: a beam with measurement quality greater than or equal to a threshold value; a beam associated with a first measurement event, and the first measurement event is a measurement event that triggers the condition-based mobility.

4. The method according to claim 3, wherein: The first beam is a beam with the best measurement quality among the multiple third beams.

5. The method according to claim 3, wherein The third beam includes a beam whose measurement quality is greater than or equal to a threshold value, the first beam is a beam associated with a first uplink resource among the multiple third beams, and the first uplink resource is the uplink resource closest in time among the uplink resources associated with each third beam.

6. The method according to claim 3, wherein: The third beam includes a beam whose measurement quality is greater than or equal to a threshold value, the first beam is a beam associated with a first downlink control channel among the multiple third beams, and the first downlink control channel is the downlink control channel closest in time among the downlink control channels associated with each third beam.

7. The method according to any one of claims 1 to 6, wherein: The method further comprises: When no beam with a measurement quality greater than or equal to the threshold value is detected, the first beam is determined to be any beam associated with the target cell.

8. The method according to any one of claims 1 to 6, wherein: The method further comprises: When no beam with a measurement quality greater than or equal to the threshold value is detected, cell access using a random access channel is performed.

9. The method according to any one of claims 1 to 8, wherein: The performing cell access without a random access channel based on the first beam includes at least one of the following: Sending uplink information on the uplink resources corresponding to the first beam; Monitor a second downlink control channel, where the second downlink control channel is the downlink control channel corresponding to the first beam.

10. The method according to claim 9, wherein: The method further comprises: Uplink information is sent on the uplink resource indicated by the second downlink control channel.

11. The method according to any one of claims 1 to 10, wherein: The method further comprises: First information is sent, where the first information is used to indicate the first beam.

12. The method according to any one of claims 1 to 11, wherein: After performing cell access without a random access channel based on the first beam, the method further includes: Second information is received on a downlink channel corresponding to the first beam, where the second information is used to indicate that access to the cell without the random access channel is successfully performed.

13. The method according to any one of claims 1 to 12, wherein: Before triggering the condition-based mobility, the method further includes: Third information is received, where the third information is used to indicate whether the terminal performs a cell access without a random access channel when the condition-based mobility is triggered.

14. The method according to any one of claims 1 to 13, wherein: Before triggering the condition-based mobility, the method further includes: Receive fourth information, where the fourth information is used to indicate an association relationship between uplink resources and / or downlink resources and the beam.

15. The method according to any one of claims 1 to 14, wherein: Before triggering the condition-based mobility, the method further includes: Fifth information is received, where the fifth information is used to indicate uplink resources associated with access of a cell without a random access channel.

16. A communication method, performed by a network device, the method comprising: Uplink information is received based on a first beam, where the first beam is determined by the terminal to perform cell access without a random access channel when condition-based mobility is triggered.

17. The method according to claim 16, wherein The first beam includes at least one of the following: a second beam among the beams associated with the target cell; Beams whose measurement quality is greater than or equal to the threshold value; Any beam associated with the target cell; A beam associated with a first measurement event, wherein the first measurement event is a measurement event that triggers the condition-based mobility.

18. The method according to claim 16 or 17, wherein The first beam is one of multiple third beams, and the third beam includes at least one of the following: a beam with measurement quality greater than or equal to a threshold value; a beam associated with a first measurement event, and the first measurement event is a measurement event that triggers the condition-based mobility.

19. The method according to claim 18, wherein The first beam is a beam with the best measurement quality among the multiple third beams.

20. The method according to claim 18, wherein The third beam includes a beam whose measurement quality is greater than or equal to a threshold value, the first beam is a beam associated with a first uplink resource among the multiple third beams, and the first uplink resource is the uplink resource closest in time among the uplink resources associated with each third beam.

21. The method according to claim 18, wherein The third beam includes a beam whose measurement quality is greater than or equal to a threshold value, the first beam is a beam associated with a first downlink control channel among the multiple third beams, and the first downlink control channel is the downlink control channel closest in time among the downlink control channels associated with each third beam.

22. The method according to any one of claims 16 to 21, wherein: When no beam with a measurement quality greater than or equal to the threshold value is detected, the first beam is any beam associated with the target cell.

23. The method according to any one of claims 16 to 21, wherein: The method further comprises: When no beam with a measurement quality greater than or equal to a threshold value is detected, a first message is received, where the first message is used for cell access on a random access channel.

24. The method according to any one of claims 16 to 23, wherein: The receiving uplink information based on the first beam includes at least one of the following: receiving uplink information on the uplink resource corresponding to the first beam; Uplink information is received on an uplink resource indicated by a second downlink control channel, where the second downlink control channel is a downlink control channel corresponding to the first beam.

25. The method according to any one of claims 16 to 24, wherein: The method further comprises: First information is received, where the first information is used to indicate the first beam.

26. The method according to any one of claims 16 to 25, wherein: After receiving the first beam, the method further includes: Second information is sent on a downlink channel corresponding to the first beam, where the second information is used to indicate that access to the cell without the random access channel is successful.

27. The method according to any one of claims 16 to 26, wherein: After receiving the first beam, the method further includes: Third information is sent, where the third information is used to indicate whether the terminal performs a cell access without a random access channel when the condition-based mobility is triggered.

28. The method according to any one of claims 16 to 27, wherein After receiving the first beam, the method further includes: Send fourth information, where the fourth information is used to indicate an association relationship between uplink resources and / or downlink resources and the beam.

29. The method according to any one of claims 16 to 28, wherein After receiving the first beam, the method further includes: Sending fifth information, where the fifth information is used to indicate uplink resources associated with access of a cell without a random access channel.

30. A terminal comprising: A first processing module is configured to determine a first beam when condition-based mobility is triggered; The first transceiver module is configured to perform cell access without a random access channel based on the first beam.

31. A network device comprising: The second transceiver module is configured to receive uplink information based on a first beam, wherein the first beam is determined by the terminal for performing cell access without a random access channel when condition-based mobility is triggered.

32. A communication device comprising: one or more processors; one or more memories for storing computer programs; The processor executes the computer program to implement the steps of the communication method according to any one of claims 1 to 29.

33. A computer-readable storage medium having a computer program stored thereon, wherein: When the computer program is executed by a processor, the steps of the communication method according to any one of claims 1 to 29 are implemented.

34. A computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the computer program implements the steps of the communication method according to any one of claims 1 to 29.

Images