Access method, device, storage medium, and chip

Abstract

The present disclosure relates to an access method, an apparatus, a storage medium, and a chip. The method includes a step in which a terminal device determines a first parameter corresponding to at least one candidate access point, determines a target timing advance (TA) used to access a target access point based on the first parameter, and accesses the target access point based on the target TA. The candidate access points may include a target access point, and the access point may include a cell and / or a beam. In this manner, the terminal device can determine the target TA based on the first parameter and access the target access point based on the target TA, thereby saving time for determining the target TA through a random access process, reducing handover delays, and improving data transmission efficiency in the handover process.

Description

[Technical Field]

[0001] The present disclosure relates to the field of communications technology, and in particular to an access method, an apparatus, a storage medium, and a chip. [Background technology]

[0002] In a handover process of a wireless communication system, a network device can send a handover command to a terminal device in response to a measurement report result sent by the terminal device, and the handover command can carry configuration information of a target cell. When the terminal device receives the handover command, the terminal device synchronizes with the target cell and can then initiate a random access process (Radom Access Channel, RACH) to access the target cell. Through the random access process, the terminal device can obtain a timing advance (TA) of the target cell and send a reconfiguration complete message to the target cell based on the TA to complete the handover.

[0003] In the related art, the delay in the handover process of the terminal device is large, and the data transmission efficiency in the handover process is reduced. Summary of the Invention [Problem to be solved by the invention]

[0004] To overcome the above problems in the prior art, the present disclosure provides an access method, an apparatus, a storage medium, and a chip. [Means for solving the problem]

[0005] According to a first aspect of an embodiment of the present disclosure, there is provided an access method, the method comprising: determining a first parameter corresponding to at least one candidate access point, the candidate access point including a target access point, the access point being a cell and / or a beam; determining a target timing advance (TA) to be used in accessing the target access point based on the first parameter; and accessing the target access point based on the target TA.

[0006] According to a second aspect of an embodiment of the present disclosure, there is provided an access method, the method comprising: determining a first parameter corresponding to at least one candidate access point, the candidate access point including a target access point; The method includes a step of transmitting a first message to a terminal device based on the first parameter, the first message including the first parameter, the first parameter being used to determine a target timing advance (TA) to be used in accessing the target access point when attempting to access the target access point, and instructing the terminal device to access the target access point based on the target TA, the access point being a cell and / or beam.

[0007] According to a third aspect of an embodiment of the present disclosure, there is provided an access apparatus, which is applied to a terminal device, the apparatus comprising: a first determination module configured to determine a first parameter corresponding to at least one candidate access point, the candidate access point including a target access point, the access point being a cell and / or a beam; a second determination module configured to determine a target timing advance (TA) to be used in accessing the target access point based on the first parameter; an access module configured to access the target access point based on the target TA.

[0008] According to a fourth aspect of an embodiment of the present disclosure, there is provided an access apparatus, which is applied to a network device, the apparatus comprising: a third determination module configured to determine a first parameter corresponding to at least one candidate access point, the candidate access point including a target access point; a first transmitting module configured to transmit a first message to a terminal device based on the first parameter, the first message including the first parameter, the first parameter being used to determine a target timing advance (TA) to be used in accessing the target access point when attempting to access the target access point, and to instruct the terminal device to access the target access point based on the target TA, the access point being a cell and / or a beam.

[0009] According to a fifth aspect of an embodiment of the present disclosure, there is provided an access device, comprising: a processor; a memory for storing instructions executable by the processor; The processor is configured to perform the steps of the access method according to the first aspect of the present disclosure.

[0010] According to a sixth aspect of an embodiment of the present disclosure, there is provided an access device, comprising: a processor; a memory for storing instructions executable by the processor; The processor is configured to perform the steps of the access method according to the second aspect of the present disclosure.

[0011] According to a seventh aspect of an embodiment of the present disclosure, there is provided a computer-readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the access method according to the first aspect of the present disclosure.

[0012] According to an eighth aspect of an embodiment of the present disclosure, there is provided a computer-readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the access method according to the second aspect of the present disclosure.

[0013] According to a ninth aspect of an embodiment of the present disclosure, there is provided a chip, comprising: A chip is provided that includes a processor and an interface, the processor reading instructions to thereby perform the steps of the access method according to the first aspect of the present disclosure.

[0014] According to a tenth aspect of the embodiment of the present disclosure, there is provided a chip, comprising: A chip is provided which includes a processor and an interface, the processor reading instructions to thereby perform the steps of the access method according to the second aspect of the present disclosure. [Effects of the Invention]

[0015] The technical solutions according to the embodiments of the present disclosure may have the following beneficial effects: A terminal device can determine a first parameter corresponding to at least one candidate access point, determine a target timing advance (TA) used to access a target access point based on the first parameter, and access the target access point based on the target TA. The candidate access points may include a target access point, and the access point may include a cell and / or a beam. In this way, the terminal device can determine a target TA based on the first parameter and access the target access point based on the target TA, thereby saving time for determining a target TA through a random access process, reducing handover delays, and improving data transmission efficiency in the handover process.

[0016] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. [Brief explanation of the drawings]

[0017] The drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification serve to explain the principles of the present disclosure. [Figure 1] 1 is a schematic diagram of a communication system according to one exemplary embodiment. [Figure 2] 1 is a process chart of an access method according to one exemplary embodiment. [Figure 3] 1 is a process chart of an access method according to one exemplary embodiment. [Figure 4] 1 is a process chart of an access method according to one exemplary embodiment. [Figure 5] 1 is a process chart of an access method according to one exemplary embodiment. [Figure 6]1 is a process chart of a method for a network device shown in one exemplary embodiment to determine a first parameter. [Figure 7] 1 is a process chart of an access method according to one exemplary embodiment. [Figure 8] 1 is a process chart of an access method according to one exemplary embodiment. [Figure 9] 1 is a block diagram of an access device according to one exemplary embodiment. [Figure 10] 1 is a block diagram of an access device according to one exemplary embodiment. [Figure 11] 1 is a block diagram of an access device according to one exemplary embodiment. [Figure 12] 1 is a block diagram of an access device according to one exemplary embodiment. [Figure 13] 1 is a block diagram of an access device according to one exemplary embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0018] Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the drawings. In the following description, when referring to the drawings, identical numerals in different drawings refer to the same or similar elements unless otherwise noted. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0019] It should be noted that all operations of obtaining signals, information or data in this disclosure are performed with permission from the owner of the corresponding device, subject to the corresponding data protection regulations and policies of the country where the device is located.

[0020] In describing the present disclosure, terms such as "first," "second," etc. are used to distinguish between similar objects and need not be understood as indicating a particular order or priority. Furthermore, in the description referring to the drawings, the same reference numerals in different drawings refer to the same elements unless otherwise specified.

[0021] In the description of this disclosure, unless otherwise specified, "plurality" means two or more than two, and the same applies to other quantifiers. "At least one," "one or more," or similar expressions mean any combination of these, including any combination of singular or plural. For example, "at least one" a can represent any number of a. Also, for example, "one or more" of a, b, and c can represent a, b, c, ab, ac, bc, or abc, where a, b, and c may be singular or plural. "And / or" is a relational relationship describing related objects and indicates that three types of relationships may exist. For example, A and / or B indicates three cases: A alone, both A and B, and B alone, where A and B may be singular or plural.

[0022] In the embodiments of the present disclosure, although operations or steps are described in a particular order in the figures, this should not be understood as requiring that these operations or steps be performed in the particular order or serial order shown, or that all of the operations or steps shown be performed to achieve desired results. In the embodiments of the present disclosure, these operations or steps may be performed serially, these operations or steps may be performed in parallel, or some of these operations or steps may be performed.

[0023] First, an implementation environment for an embodiment of the present disclosure will be introduced below.

[0024] The technical solutions of the embodiments of the present disclosure can be applied to various communication systems, including one or more of a 4G (4th Generation) communication system, a 5G (5th Generation) communication system, and other future wireless communication systems (e.g., 6G), a Public Land Mobile Network (PLMN) network, a Device-to-Device (D2D) communication system, a Machine-to-Machine (M2M) communication system, an Internet of Things (IoT) communication system, a Vehicle-to-Everything (V2X) communication system, or other communication systems.

[0025] 1 is a schematic diagram of a communication system shown in one exemplary embodiment. As shown in FIG. 1, the communication system may include a terminal device 150 and a network device 160. The communication system may be used to support 4G network access technologies such as Long Term Evolution (LTE) access technologies, 5G network access technologies such as New Radio Access Technology (New RAT), or other future wireless communication technologies. Note that in the communication system, the number of network devices and terminal devices may be one or more. The number of network devices and terminal devices in the communication system shown in FIG. 1 is merely an example, and the present disclosure is not limited thereto.

[0026] The network device in FIG. 1 may be used to support access of a terminal. For example, the network device may be an evolved base station (evolutionary Node B, eNB or eNodeB) in LTE, the network device may be a next generation base station (the next generation Node B, gNB or gNodeB) in a 5G network, the network device may be a radio access network (NG Radio Access Network, NG-RAN) device in a 5G network, the network device may be a base station, a broadband network gateway (BNG), an aggregation switch, or a non-3GPP (3rd Generation Partnership Project) access device in a future evolved public land mobile network (PLMN), etc. Optionally, the network device in the embodiments of the present disclosure may include various types of base stations, such as a macro base station, a micro base station (also called a small station), a relay station, an access point, a 5G base station or a future base station, a satellite, a transmitting and receiving point (TRP), a transmitting point (TP), a mobile switching center, a device-to-device (D2D), a machine-to-machine (M2M), an Internet of Things (IoT), an Internet of Vehicles (V2X), or other devices that perform the function of a base station in communications, and the embodiments of the present disclosure are not particularly limited thereto. For convenience of description, in all embodiments of the present disclosure, devices that provide wireless communication functions to terminal devices will be collectively referred to as network devices or base stations.

[0027] The terminal device in FIG. 1 may be an electronic device providing voice or data communication. For example, the terminal device may be referred to as user equipment (UE), subscriber unit, mobile station, station, terminal, etc. For example, the terminal device may include a smartphone, a smart wearable device, a smart speaker, a smart tablet, a wireless modem, a wireless local loop (WLL) station, a personal digital assistant (PDA), a customer premises equipment (CPE), etc. With the development of wireless communication technology, any device that can access a communication system, communicate with a network device of a communication system, communicate with other objects via a communication system, or directly communicate between two or more devices may be a terminal device in the embodiments of the present disclosure. Examples include terminals and automobiles in smart transportation, household devices in smart homes, power meter readers, voltage monitoring meters, environmental monitoring meters in smart grids, video environment monitoring meters in smart security networks, cash registers, etc. In the embodiments of the present disclosure, a terminal device may communicate with a network device, and the terminal device may be statically fixed or mobile, and the present disclosure is not limited thereto.

[0028] In some embodiments, the network device may include at least one base station, and each base station may include at least one cell. Furthermore, each cell may further include at least one beam. As an example, some or all of the cells in the network device may be cells that support beamforming, and each cell may be equipped with one or more beams.

[0029] The above communication system can support mobility handover of a terminal device. For example, the terminal device may handover between two beams, between two cells, or between two base stations. In the handover process of the wireless communication system, the network device can send a handover command to the terminal device in response to a measurement report result sent by the terminal device, and the handover command may carry configuration information of a target cell. When the terminal device receives the handover command, the terminal device can synchronize with the target cell and then initiate a random access (Radom Access Channel, RACH) process to access the target cell. Through the random access process, the terminal device can obtain a timing advance (TA) of the target cell and send a reconfiguration complete message to the target cell based on the TA to complete the handover.

[0030] In some embodiments, the network device may indicate to the terminal device in the handover command the TA to be used to access the target cell, so that the terminal device can directly send a reconfiguration complete message to the target cell without performing a random access process, i.e., skipping the RACH, thereby reducing the handover delay and improving data transmission efficiency.

[0031] In some embodiments, to improve the robustness of the handover, the terminal device may perform a conditional handover (CHO). In the conditional handover process, the network device may pre-configure a CHO handover command for the terminal device, including a handover target cell configuration and a handover trigger condition, where the handover target cell configuration may be a configuration parameter provided by the target cell. The terminal device may store the CHO handover command received from the network device and perform radio resource management (RRM) measurements to determine whether the handover trigger condition indicated by the CHO handover command is satisfied. If the handover trigger condition is satisfied, the terminal device may perform a handover by itself. This can avoid a radio link failure caused by the base station sending the handover command too late.

[0032] In addition, when a terminal device hands over to a target cell, the TAs used may be different depending on different cells or beams, and in the condition-based handover process, the network device does not know when the handover will be performed, and the TAs used by the terminal device when handing over at different locations or times may be different, so the TA of the target cell cannot be indicated in the CHO command, which means that the terminal device cannot skip the RACH stage in the condition-based handover process, and as a result, the handover delay is still large.

[0033] The present disclosure provides an access method, an apparatus, a storage medium, and a chip to solve the above problems.

[0034] 2 is a process chart of an access method shown in one exemplary embodiment. The method can be applied to a terminal device in the above communication system. As shown in FIG. 2, the method may include the following steps S201 to S203.

[0035] In S201, the terminal device determines a first parameter corresponding to at least one candidate access point.

[0036] Here, the candidate access point may include a target access point, and the access point may be one or more of a cell and a beam. For example, in one possible embodiment, the terminal device may determine a first parameter corresponding to at least one candidate cell, and the candidate cell may include a target cell. In another possible embodiment, the terminal device may determine a first parameter corresponding to at least one candidate beam, and the candidate beam may include a target beam. In another possible embodiment, the terminal device may determine a first parameter corresponding to at least one candidate cell and candidate beam. Here, the first parameter corresponding to the target access point is used to instruct the terminal device to determine a timing advance (TA) to be used for accessing the target access point.

[0037] In some embodiments, the first parameter may be a parameter preset by the terminal device.

[0038] In some other embodiments, the first parameter may be a parameter set by the network device, for example, the network device sends a configuration to the terminal and sets the corresponding parameter in the terminal.

[0039] In response to receiving a first message sent by a network device, the terminal device may obtain the first parameter based on the first message, i.e., the network device may send a first message to the terminal device, and the first message includes the first parameter.

[0040] In S202, the terminal device determines a target timing advance (TA) to be used for accessing the target access point based on the first parameter.

[0041] In addition, the terminal device may determine whether to attempt to access the target access point based on a preset condition, where the preset condition may include a handover condition, an RRC (Radio Resource Control) reconfiguration condition, or other conditions, and the manner in which the terminal device accesses the target access point may include, but is not limited to, handover-based access, RRC reconfiguration-based access, or direct access.

[0042] For example, when a terminal device receives a handover command sent by a network device, it may attempt to access the target access point in accordance with the instructions of the handover command, i.e., initiate handover access to the target access point based on the instructions of the handover command.

[0043] Also, for example, the terminal device may attempt to access the target access point on its own if the handover conditions are met based on the CHO process, that is, may initiate handover access to the target access point based on the CHO process.

[0044] In some embodiments, when a terminal device determines to attempt to access a target access point, it may obtain a first parameter corresponding to the target access point, and determine a target TA to be used to access the target access point based on the first parameter.

[0045] In S203, the terminal device accesses the target access point based on the target TA.

[0046] For example, the terminal device may access the target access point based on the target TA based on a random access channel-less (RACH-less) scheme. For example, the terminal device may skip the random access process based on the target TA and directly send an RRC configuration complete message to the target access point based on the target TA, thereby accessing the target access point.

[0047] In the embodiments shown in the present disclosure, the target access point may include one or more of a target cell and a target beam, and the candidate access point may include one or more of a candidate cell and a candidate beam.

[0048] In some embodiments, the target access point may include a target cell, which may be different from or the same as the serving cell of the terminal device, where the serving cell represents the cell currently used by the terminal device.

[0049] In this way, the terminal device can obtain target TAs of different cells.

[0050] In some other embodiments, the target access point may be a target beam, which may be different from or the same as the serving beam of the terminal device, where the serving beam represents the beam currently used by the terminal device. Furthermore, the target beam and the serving beam may be in the same cell or in different cells.

[0051] In some other embodiments, the target access point may include a target cell and a target beam. For example, the terminal device may access the target beam of the target cell by handing over from the serving beam of the serving cell to the target beam of the target cell.

[0052] In this way, the terminal device can acquire targets TA of different beams.

[0053] By employing the above method, a terminal device can determine a first parameter corresponding to at least one candidate access point, determine a target timing advance (TA) used to access a target access point based on the first parameter, and access the target access point based on the target TA. Here, the candidate access points may include a target access point, and the access point may include a cell and / or a beam. In this way, the terminal device can determine a target TA based on the first parameter and access the target access point based on the target TA, thereby saving time for determining a target TA through a random access process, reducing handover delays, and improving data transmission efficiency in the handover process.

[0054] 3 is a process chart of an access method shown in one exemplary embodiment. As shown in FIG. 3, the method may include the following steps S301 to S303.

[0055] In S301, the terminal device receives a first message sent by the network device. Here, the first message may include a first parameter corresponding to at least one candidate access point, so that when the terminal device receives the first message, the terminal device can obtain the first parameter corresponding to the at least one candidate access point in the first message.

[0056] The first message may be any message or data package that the network device sends to the terminal device.

[0057] In some embodiments, the first message may be any RRC message sent by a network device to a terminal device, such as an RRC reconfiguration message, an RRC access success message, or another RRC message.

[0058] In some other embodiments, the first message may be an RRC message other than a handover command message. For example, the first message may be a message for instructing the terminal device to perform a CHO handover, such as a CHO handover command message.

[0059] In some other embodiments, the first message may be a system message, and the network device may broadcast the first parameters corresponding to the at least one candidate access point through the system message.

[0060] Here, the candidate access points may include a target access point, and the access point may be a cell and / or a beam.

[0061] If the access point includes a cell, the candidate access points may include one or more of a serving cell and a neighboring cell. The serving cell may be a cell that a terminal device currently accesses or is located in, e.g., the serving cell may provide wireless communication service to the terminal device.

[0062] In some embodiments, the neighboring cells may include cells that have a cell neighbor relationship with the serving cell. In other embodiments, the neighboring cells may include cells whose distance from the serving cell is equal to or less than a predetermined neighboring cell distance threshold. In still other embodiments, the neighboring cells may include cells that have a cell neighbor relationship with the serving cell and whose distance from the serving cell is equal to or less than a predetermined neighboring cell distance threshold. In still other embodiments, the neighboring cells may include cells that have a cell neighbor relationship with the serving cell or cells whose distance from the serving cell is equal to or less than a predetermined neighboring cell distance threshold. Here, the predetermined neighboring cell distance threshold may be any predetermined distance threshold.

[0063] If the access point is a beam, the candidate access points may include one or more of a serving beam and a neighboring beam. The serving beam may be a beam that a terminal device is currently accessing or serving, e.g., the serving beam may provide wireless communication service to the terminal device.

[0064] Similarly, in some embodiments, the neighboring beam may include a beam that has a beam neighbor relationship with the serving beam. In other embodiments, the neighboring beam may include a beam whose distance from the serving beam is equal to or less than a predetermined neighboring beam distance threshold. In still other embodiments, the neighboring beam may include a beam that has a beam neighbor relationship with the serving beam and whose distance from the serving beam is equal to or less than a predetermined neighboring beam distance threshold. In still other embodiments, the neighboring beam may include a beam that has a beam neighbor relationship with the serving beam or a beam whose distance from the serving beam is equal to or less than a predetermined neighboring beam distance threshold. Here, the predetermined neighboring beam distance threshold may be any predetermined distance threshold.

[0065] In S302, when the target access point to be accessed is determined, the terminal device determines a target timing advance (TA) to be used for accessing the target access point based on the first parameter.

[0066] In S303, the terminal device accesses the target access point based on the target TA.

[0067] In this way, the terminal device can receive the first parameter from the network device, determine the target TA based on the first parameter, and access the target access point based on the target TA, thereby saving the time required to determine the target TA through the random access process, reducing the handover delay, and improving the data transmission efficiency in the handover process.

[0068] The first parameter may include an access point identifier of at least one candidate access point and an access point TA parameter corresponding to each access point identifier. In this way, the terminal device can determine a target access point TA parameter corresponding to a target access point identifier based on the first parameter, where the target access point identifier may be an access point identifier corresponding to a target access point to be accessed. The terminal device determines the target TA based on the target access point TA parameter.

[0069] Here, the access point identifier may include one or more of a cell identifier and a beam identifier. For example, the cell identifier may include a CGI (Cell Global Identifier), and the beam identifier may be determined by a TCI (Transmission Configuration Indicator).

[0070] In some embodiments, the access point identifier may include a cell identifier, and the access point TA parameters may include cell TA parameters. In other embodiments, the access point identifier may include a beam identifier, and the access point TA parameters may include beam TA parameters. In still other embodiments, the access point identifier may include a cell identifier and a beam identifier, and the access point TA parameters may include a cell TA parameter and a beam TA parameter.

[0071] In some embodiments, the access point TA parameter may include a reserved TA, which may be used to instruct the terminal device to obtain a TA length corresponding to the access point identifier.

[0072] For example, the reserved TA may include an access point TA length (the access point TA length may be any numerical value equal to or greater than 0) or an access point TAG (Timing Advance Group) identifier, i.e., the above access point TA parameter may include the access point TA length or the access point TAG identifier. In this way, the terminal device may determine a target TA length corresponding to a target access point identifier based on the reserved TA (or the access point TA parameter). For example, the access point TA length corresponding to the target access point identifier may be the TA length of the target TA, or the TA length of the target TA may be determined based on the access point TAG identifier corresponding to the target access point identifier.

[0073] The terminal device may store N timing advance band groups (TAGs), where N may be a positive integer greater than or equal to 1, for example, N is 4. Each TAG may include at least one cell, and cells in the same TAG may use the same TA length. Each TAG may be distinguished by a TAG identifier, that is, different TAGs have different TAG identifiers. Each cell may belong to one TAG. In this way, the corresponding TA length may be determined based on the TAG identifier.

[0074] In some embodiments, the reserved TA is a TA offset N TA It may further include an offset.

[0075] In some other embodiments, the above target access point TA parameters may include at least one reserved TA and first condition information corresponding to each reserved TA.

[0076] In this way, the terminal device can determine whether the terminal device satisfies the TA activation condition based on the first condition information, and if it is determined that the terminal device satisfies the TA activation condition, determine the target TA based on the reserved TA corresponding to the first condition information.

[0077] Note that the reserved TA may also include an access point TA length or an access point TAG identifier.

[0078] In some embodiments, if the above access point TA parameters include a reserved TA but do not include the above first condition information, the terminal device may directly obtain a target TA corresponding to the target access point without performing a condition judgment.

[0079] The first condition information includes one or more of preset signal condition information, preset position condition information, and preset time condition information, each of which will be described below.

[0080] Information 1. Pre-set signal condition information The pre-set signal condition information may be used to instruct the terminal device to determine whether the terminal device meets the TA enabling condition based on the wireless signal strength of the detected target access point.

[0081] In some embodiments, when the first condition information includes predetermined signal condition information, the TA enabling condition includes that the wireless signal strength of the target access point detected by the terminal device is within a target signal strength range, and the target signal strength range is a signal strength range determined based on the predetermined signal condition information.

[0082] The radio signal strength may include a Reference Signal Receiving Power (RSRP) or a Received Signal Strength Indicator (RSSI) detected by the terminal device.

[0083] Taking the case where the radio signal strength is RSRP as an example, the pre-set signal condition information may include at least one correspondence relationship between RSRP and TA, and may, for example, include correspondence relationships between a plurality of RSRP ranges and TA. For example, a TA corresponding to a signal condition in which RSRP is smaller than a first RSRP value may be a first reserved TA, a TA corresponding to a signal condition in which RSRP is between the first RSRP value and a second RSRP value (e.g., equal to or greater than the first RSRP value and less than the second RSRP value) may be a second reserved TA, a TA corresponding to a signal condition in which RSRP is between the second RSRP value and a third RSRP value (e.g., equal to or greater than the second RSRP value and less than the third RSRP value) may be a third reserved TA, and a TA corresponding to a signal condition in which RSRP is equal to or greater than the third RSRP value may be a fourth reserved TA. The first to fourth RSRP values may be set empirically, and, for example, the relationship of the magnitudes of the RSRP values may be the first RSRP value<the second RSRP value<the third RSRP value<the fourth RSRP value. In some other embodiments, more or fewer interval ranges may be configured, for example, M RSRPs ordered from smallest to largest may be divided to obtain M+1 RSRP interval ranges, each RSRP range corresponding to one reserved TA.

[0084] In this way, when the terminal device detects that the RSRP of the target access point is within a target signal strength range, it can determine the target TA based on the reserved TA corresponding to the target signal strength range. For example, when the terminal device detects that the RSRP of the target access point is equal to or greater than a first RSRP value and less than a second RSRP value, it may determine the second reserved TA as the target TA.

[0085] The preset signal condition information may include signal condition information corresponding to candidate access points of the terminal device. The candidate access points may include one or more. For example, if the access point is a cell, the candidate access points may include one or more of a serving cell, a handover target cell, and a neighboring cell. For example, if the access point is a beam, the candidate access points may include one or more of a serving beam, a handover target beam, and a neighboring beam.

[0086] In this way, the terminal device can determine whether the terminal device satisfies the TA enabling condition based on the preset signal condition information, and if it is determined that the terminal device satisfies the TA enabling condition, determine a target TA based on the reserved TA corresponding to the preset signal condition information.

[0087] Information 2. Pre-set location condition information The preset location condition information may be used to instruct the terminal device to determine whether the terminal device satisfies a TA enabling condition based on the location information of the terminal device.

[0088] In some embodiments, when the first condition information includes preset location condition information, the preset location condition information may include at least one first reserved cell, and the TA enabling condition may include that a serving cell of the terminal device is included in the at least one first reserved cell.

[0089] For example, the terminal device may determine at least one first reserved cell based on the preset location condition information, and may determine that the terminal device satisfies a TA enabling condition if the serving cell is included in the first reserved cell, thereby determining a target TA based on the reserved TA corresponding to the preset location condition information.

[0090] In some other embodiments, when the first condition information includes predetermined location condition information, the predetermined location condition information may include at least one second reserved cell and a first distance parameter corresponding to each second reserved cell, and the TA enabling condition may include that a first distance between the terminal device and an antenna corresponding to the second reserved cell is less than or equal to a first distance threshold, and the first distance threshold is a distance threshold determined based on the first distance parameter.

[0091] As an example, the terminal device may determine a first distance threshold based on a first distance parameter, and if the distance between the terminal device and the second reserved cell is less than or equal to the first distance threshold, determine that the terminal device satisfies the TA activation condition, and determine a target TA based on the reserved TA corresponding to the preset location condition information.

[0092] In this embodiment, there are multiple methods by which the terminal device determines the first distance threshold based on the first distance parameter. For example, the terminal device may use the first distance parameter as the first distance threshold. Furthermore, for example, the terminal device may determine the first distance threshold corresponding to the first distance parameter based on a preset distance parameter-threshold correspondence relationship. The preset distance parameter-threshold correspondence relationship may be the same correspondence relationship set by both the terminal device and the network device. For example, if the first distance parameter is 1, the corresponding first distance threshold may be 30; if the first distance parameter is 2, the corresponding first distance threshold may be 50; and if the first distance parameter is 3, the corresponding first distance threshold may be 100.

[0093] In some other embodiments, when the first condition information includes predetermined location condition information, the predetermined location condition information includes a predetermined location parameter and a second distance parameter, and the TA enabling condition includes that a second distance between the terminal device and the predetermined location is less than or equal to a second distance threshold, the predetermined location is a geographical location determined based on the predetermined location parameter, and the second distance threshold is a distance threshold determined based on the second distance parameter.

[0094] For example, the terminal device may determine a second distance threshold based on the second distance parameter, and determine that the terminal device satisfies the TA enabling condition when the distance between the terminal device and the preset location is equal to or less than the second distance threshold, and determine a target TA based on the reserved TA corresponding to the preset location condition information, where the preset location may be a geographical location determined based on the preset location parameter.

[0095] As an example, the preset location parameters may be latitude and longitude parameters, and the preset location may be determined based on the latitude and longitude parameters.

[0096] Similarly, there are multiple ways for the terminal device to determine the second distance threshold based on the second distance parameter, and for example, the terminal device may use the second distance parameter as the second distance threshold. Also, for example, the terminal device may determine the second distance threshold corresponding to the second distance parameter based on a predetermined correspondence relationship between the distance parameter and the threshold.

[0097] In this way, the terminal device can determine whether the terminal device satisfies the TA enabling condition based on the preset location condition information, and if it is determined that the terminal device satisfies the TA enabling condition, determine a target TA based on the reserved TA corresponding to the preset location condition information.

[0098] Information 3. Pre-set time condition information The preset time condition information may be used to instruct the terminal device to determine whether the terminal device satisfies the TA enabling condition based on the access start time.

[0099] As an example, when the first condition information includes predetermined time condition information, the predetermined time condition information includes a predetermined time parameter, and the TA enabling condition includes that the current time of the terminal device is within a first time range, and the first time range is a time range determined based on the predetermined time parameter.

[0100] In some embodiments, the preset time parameters include a first absolute time and a first time length, and the first time range may be determined by determining the first time range based on the first absolute time and the first time length.

[0101] Here, the first absolute time and the first time length may be times determined by the network device based on preset parameters.

[0102] As an example, the first time range may be a time range obtained by adding a first time length to a first absolute time. For example, the first absolute time may be a preset absolute time (e.g., 7 PM), and the first time length may be a preset time length (e.g., 30 minutes). In this way, the time range from 7 PM to 7:30 PM may be the first time range.

[0103] In this way, if the current time of the terminal device is within the first time range, it can be determined that the terminal device meets the target TA enabling condition.

[0104] In some embodiments, the preset time parameter may include a second time length and a first preset condition, and the first time range may be determined by a method in which the second time length after the terminal device meets the first preset condition is the first time range.

[0105] As an example, the first time range may be determined by a first timer, and when the terminal device satisfies a first preset condition, the first timer may be started or restarted, and the time length of the first timer may be a second time length, and if the current time of the terminal device is within the operating time length range of the first timer, it may be determined that the current time of the terminal device is within the first time range, that is, it may be determined that the terminal device satisfies the TA enabling condition.

[0106] The first preset condition may include one or more of the following conditions:

[0107] Condition 1. The terminal device receives a first message sent by the network device.

[0108] As an example, when a first message sent by a network device is received, the first timer may be started or restarted based on the second length of time.

[0109] Condition 2: The current time of the terminal device is equal to the second absolute time.

[0110] Here, the second absolute time may be determined by the terminal device based on a time parameter received from the network device.

[0111] As an example, if the current time of the terminal device is equal to the second absolute time, the first timer may be started or restarted based on the second time length.

[0112] Condition 3. The terminal device determines that the terminal device satisfies the TA enabling condition based on the preset signal condition information.

[0113] Condition 4. The terminal device determines that the terminal device satisfies the TA enabling condition based on the preset location condition information.

[0114] For example, when the terminal device triggers a target event, the first timer may be started or restarted based on the second duration, which may include an event corresponding to condition 3 or condition 4.

[0115] In this way, the terminal device can determine whether the terminal device satisfies the TA enabling condition based on the preset time condition information, and if it is determined that the terminal device satisfies the TA enabling condition, determine the target TA based on the reserved TA corresponding to the preset time condition information.

[0116] When the above method is adopted, the terminal device may determine whether the terminal device satisfies the TA enabling condition based on one or more of the above first condition information, and if it is determined that the terminal device satisfies the TA enabling condition, determine a target TA based on the reserved TA corresponding to the first condition information.

[0117] In some embodiments, if the terminal device satisfies any one of the above first condition information, the target TA may be determined based on the reserved TA corresponding to the first condition information. For example, the reserved TA may be set as the target TA.

[0118] In some other embodiments, when the terminal device satisfies multiple pieces of the above-mentioned first condition information, the target TA may be determined based on the reserved TAs corresponding to the multiple pieces of first condition information. For example, the target TA may be the average, maximum, or minimum value of the reserved TAs corresponding to the multiple pieces of first condition information.

[0119] In this way, the terminal device can determine a target TA based on various condition information and access a target access point (e.g., a target cell or a target beam) based on the target TA.

[0120] In some embodiments of the present disclosure, the terminal device may further determine an uplink channel resource parameter, and if it determines a target TA to be used for accessing the target access point based on the first parameter, it may perform uplink transmission based on the uplink channel resource parameter.

[0121] As an example, the terminal device may perform uplink transmission via a target access point (target cell or target beam) based on the uplink channel resource parameters.

[0122] Here, the uplink channel resource parameter may include a parameter indicating an uplink PUSCH (Physical Uplink Shared Channel) resource, which may be an available PUSCH resource provided by a network device, such as a reserved PUSCH resource.

[0123] In some embodiments, the terminal device may receive a second message sent by the network device, and the second message may include uplink channel resource parameters. In this way, when the terminal device receives the second message sent by the network device, it may obtain the uplink channel resource parameters in the second message and determine the uplink PUSCH resource based on the uplink resource parameters. Here, the second message may be the same as or different from the first message.

[0124] There are several ways for a terminal device to perform uplink transmission based on the uplink channel resource parameters, and examples thereof are as follows:

[0125] In some embodiments, the terminal device may transmit an uplink RRC message based on the uplink channel resource parameter, which may include an RRC reconfiguration complete message, an RRC reconfiguration failure message, or another RRC message.

[0126] In some other embodiments, the terminal device may transmit uplink data based on the uplink channel resource parameters.

[0127] In some other embodiments, the terminal device may transmit an uplink RRC message and uplink data based on the uplink channel resource parameters.

[0128] In this way, when the target TA is determined, the terminal device may perform uplink transmission based on the uplink channel resource parameters, thereby reducing the delay of service interruption due to handover and improving data transmission efficiency.

[0129] 4 is a process chart of an access method shown in one exemplary embodiment. As shown in FIG. 4, the method may include the following steps S401 to S406.

[0130] In S401, the terminal device receives a first message sent by the network device.

[0131] The first message may be any message or data package sent by the network device to the terminal device, for example, a message for instructing the terminal device to perform a CHO handover, such as a CHO handover command message.

[0132] In some embodiments, the first message may include first parameters corresponding to at least one candidate access point.

[0133] In some other embodiments, the first message may further include uplink channel resource parameters corresponding to at least one candidate access point.

[0134] In some other embodiments, the first message may further include a first parameter and an uplink channel resource parameter corresponding to at least one candidate access point.

[0135] At S402, the terminal device determines a first parameter corresponding to at least one candidate access point based on the first message.

[0136] Here, the first parameter may be used to instruct a terminal device to determine a timing advance (TA) to be used for accessing the candidate access point. For example, the first parameter may include an access point identifier of at least one candidate access point and an access point TA parameter corresponding to each access point identifier. Further, the access point TA parameter may include at least one reserved TA and first condition information corresponding to each reserved TA.

[0137] At S403, the terminal device determines uplink channel resource parameters corresponding to at least one candidate access point based on the first message.

[0138] In S404, the terminal device determines a target access point to be accessed.

[0139] It should be noted that the above steps S402, S403, and S404 may be executed in any order or in parallel, and the present disclosure is not limited thereto.

[0140] At S405, the terminal device determines a target timing advance (TA) to be used for accessing the target access point based on the first parameter, and determines a target uplink channel resource to be used for accessing the target access point based on the uplink channel resource parameter.

[0141] At S406, the terminal device accesses the target access point based on the target TA and the target uplink channel resource.

[0142] As an example, the terminal device may transmit an RRC reconfiguration complete message or uplink data to the target access point using a target uplink channel resource (e.g., a PUSCH resource) to access and communicate with the target access point based on the target TA.

[0143] In this way, the terminal device can access the target access point based on the target TA and the target uplink channel resource, thereby further reducing the delay of service interruption due to handover and improving data transmission efficiency.

[0144] 5 is a process chart of an access method shown in one exemplary embodiment. The method can be applied to a network device in the above-mentioned communication system. As shown in FIG. 5, the method may include S501 and S502.

[0145] At S501, the network device determines a first parameter corresponding to at least one candidate access point.

[0146] Here, the candidate access point may include a target access point, and the access point may be a cell and / or a beam. For example, in one possible embodiment, the network device may determine a first parameter corresponding to at least one candidate cell, and the candidate cell may include a target cell. In another possible embodiment, the network device may determine a first parameter corresponding to at least one candidate beam, and the candidate beam may include a target beam. In another possible embodiment, the network device may determine a first parameter corresponding to at least one candidate cell and candidate beam. The first parameter corresponding to the target access point may be used to instruct a terminal device to determine a timing advance (TA) to be used for accessing the target access point.

[0147] If the access point includes a cell, the candidate access points may include one or more of a serving cell and a neighboring cell determined by the network device. The serving cell may be a cell that the terminal device is currently accessing or serving, e.g., the serving cell may provide wireless communication service to the terminal device.

[0148] In some embodiments, the neighboring cells may include cells that have a cell neighbor relationship with the serving cell. In other embodiments, the neighboring cells may include cells whose distance from the serving cell is equal to or less than a predetermined neighboring cell distance threshold. In still other embodiments, the neighboring cells may include cells that have a cell neighbor relationship with the serving cell and whose distance from the serving cell is equal to or less than a predetermined neighboring cell distance threshold. In still other embodiments, the neighboring cells may include cells that have a cell neighbor relationship with the serving cell or cells whose distance from the serving cell is equal to or less than a predetermined neighboring cell distance threshold. Here, the predetermined neighboring cell distance threshold may be any predetermined distance threshold.

[0149] If the access point includes beams, the candidate access points may include one or more of a serving beam and a neighboring beam. The serving beam may be a beam that a terminal device is currently accessing or serving, e.g., the serving beam may provide wireless communication service to the terminal device.

[0150] Similarly, in some embodiments, the neighboring beam may include a beam that has a beam neighbor relationship with the serving beam. In other embodiments, the neighboring beam may include a beam whose distance from the serving beam is equal to or less than a predetermined neighboring beam distance threshold. In still other embodiments, the neighboring beam may include a beam that has a beam neighbor relationship with the serving beam and whose distance from the serving beam is equal to or less than a predetermined neighboring beam distance threshold. In still other embodiments, the neighboring beam may include a beam that has a beam neighbor relationship with the serving beam or a beam whose distance from the serving beam is equal to or less than a predetermined neighboring beam distance threshold. Here, the predetermined neighboring beam distance threshold may be any predetermined distance threshold.

[0151] At S502, the network device sends a first message to the terminal device based on the first parameter.

[0152] Here, the first message may include the above-mentioned first parameter, and when attempting to access the target access point, the first parameter may be used to determine a target timing advance (TA) to be used for accessing the target access point, and to instruct the terminal device to access the target access point based on the target TA.

[0153] In addition, the terminal device may determine whether to attempt to access the target access point based on a preset condition, where the preset condition may include a handover condition, an RRC (Radio Resource Control) reconfiguration condition, or other conditions, and the manner in which the terminal device accesses the target access point may include, but is not limited to, handover-based access, RRC reconfiguration-based access, or direct access.

[0154] For example, when a terminal device receives a handover command sent by a network device, the terminal device may attempt to access the target access point based on the instructions of the handover command, i.e., may initiate handover access to the target access point based on the instructions of the handover command.

[0155] Also, for example, the terminal device may attempt to access the target access point on its own if the handover conditions are met based on the CHO process, that is, may initiate handover access to the target access point based on the CHO process.

[0156] By employing the above method, a network device can determine a first parameter corresponding to at least one candidate access point and send a first message to a terminal device based on the first parameter. Here, the candidate access point may include a target access point, and the access point may include a cell and / or a beam. The first message may include the first parameter, which, when attempting to access the target access point, may be used to determine a target timing advance (TA) to be used for accessing the target access point and instruct the terminal device to access the target access point based on the target TA. In this way, the network device can determine the target TA based on the first parameter and instruct the terminal device to access the target access point based on the target TA, thereby saving the time required for determining the target TA through a random access process, reducing handover delays, and improving data transmission efficiency in the handover process.

[0157] 6 is a process chart of a method for determining a first parameter by a network device according to an exemplary embodiment. As shown in FIG. 6, the method may include the following steps S601 to S603.

[0158] At S601, the network device determines an access point identifier of at least one candidate access point.

[0159] Here, the access point identifier may include one or more of a cell identifier and a beam identifier. For example, the cell identifier may include a CGI (Cell Global Identifier), and the beam identifier may be determined by a TCI (Transmission Configuration Indication).

[0160] At S602, the network device determines access point TA parameters corresponding to each access point identifier.

[0161] Here, the access point TA parameters may be parameters pre-set by the network device. For example, the network device may pre-set at least one access point identifier and access point TA parameters corresponding to each access point identifier.

[0162] In some embodiments, the access point identifier may include a cell identifier, and the access point TA parameters may include cell TA parameters. In other embodiments, the access point identifier may include a beam identifier, and the access point TA parameters may include beam TA parameters. In still other embodiments, the access point identifier may include a cell identifier and a beam identifier, and the access point TA parameters may include a cell TA parameter and a beam TA parameter.

[0163] At S603, the network device obtains a first parameter based on the access point identifier and the access point TA parameter.

[0164] In this manner, the network device may determine a first parameter corresponding to at least one candidate access point.

[0165] In some embodiments, the access point TA parameter may include a reserved TA, which may be used to instruct the terminal device to obtain a TA length corresponding to the access point identifier.

[0166] As an example, the reserved TA may include an access point TA length (the access point TA length may be any numerical value equal to or greater than 0) or an access point TAG identifier, that is, the above access point TA parameter may include an access point TA length or an access point TAG identifier. In this way, the terminal device may determine the length of the target TA corresponding to the target access point identifier based on the reserved TA (or the access point TA parameter). For example, the access point TA length corresponding to the target access point identifier may be the TA length of the target TA, or the TA length of the target TA may be determined based on the access point TAG identifier corresponding to the target access point identifier.

[0167] In some embodiments, the reserved TA is a TA offset N TA It may further include an offset.

[0168] In some other embodiments, the above access point TA parameters may include at least one reserved TA and first condition information corresponding to each reserved TA.

[0169] As an example, the network device may obtain the access point TA parameters in the following manner:

[0170] First, obtain at least one reserved TA corresponding to the access point identifier.

[0171] Next, the first condition information corresponding to each reserved TA is determined.

[0172] Finally, the access point TA parameters are determined based on the reserved TA and the first condition information.

[0173] The first condition information includes one or more of preset signal condition information, preset position condition information, and preset time condition information, each of which will be described below.

[0174] Information 1. Pre-set signal condition information The pre-set signal condition information may be used to instruct the terminal device to determine whether the terminal device meets the TA enabling condition based on the wireless signal strength of the detected target access point.

[0175] As an example, when the first condition information includes preset signal condition information, the TA enabling condition includes that the wireless signal strength of the target access point detected by the terminal device is within a target signal strength range, and the target signal strength range is a signal strength range determined based on the preset signal condition information.

[0176] In some embodiments, when the first condition information includes predetermined signal condition information, the TA enabling condition may include that the wireless signal strength of the target access point detected by the terminal device is within a target signal strength range, and the target signal strength range may be within a signal strength range determined based on the predetermined signal condition information, where the wireless signal strength may include an RSRP or an RSSI detected by the terminal device.

[0177] Information 2. Pre-set location condition information The preset location condition information may be used to instruct the terminal device to determine whether the terminal device satisfies a TA enabling condition based on the location information of the terminal device.

[0178] In some embodiments, when the first condition information includes preset location condition information, the preset location condition information may include at least one first reserved cell, and the TA enabling condition may include that a serving cell of the terminal device is included in the at least one first reserved cell.

[0179] For example, the preset location condition information may be used to instruct the terminal device to determine at least one first reserved cell based on the preset location condition information, and determine that the terminal device satisfies a TA enabling condition if the serving cell is included in the first reserved cell, so that a target TA can be determined based on the reserved TA corresponding to the preset location condition information.

[0180] In some other embodiments, when the first condition information includes predetermined location condition information, the predetermined location condition information may include at least one second reserved cell and a first distance parameter corresponding to each second reserved cell, and the TA enabling condition may include that a first distance between the terminal device and an antenna corresponding to the second reserved cell is less than or equal to a first distance threshold, and the first distance threshold is determined based on the first distance parameter.

[0181] As an example, the preset location condition information may be used to determine a first distance threshold based on a first distance parameter, and if the distance between the terminal device and the second reserved cell is less than or equal to the first distance threshold, determine that the terminal device satisfies the TA activation condition, and instruct the terminal device to determine a target TA based on the reserved TA corresponding to the preset location condition information.

[0182] In some other embodiments, when the first condition information includes predetermined location condition information, the predetermined location condition information includes a predetermined location parameter and a second distance parameter, and the TA enabling condition includes that a second distance between the terminal device and the predetermined location is less than or equal to a second distance threshold, the predetermined location is a geographical location determined based on the predetermined location parameter, and the second distance threshold is a distance threshold determined based on the second distance parameter.

[0183] For example, the preset location condition information may be used to determine a second distance threshold based on a second distance parameter, and when the distance between the terminal device and the preset location is equal to or less than the second distance threshold, determine that the terminal device satisfies the TA enabling condition, and instruct the terminal device to determine a target TA based on a reserved TA corresponding to the preset location condition information, where the preset location may be a geographical location determined based on the preset location parameter.

[0184] Information 3. Pre-set time condition information The preset time condition information may be used to instruct the terminal device to determine whether the terminal device satisfies the TA enabling condition based on the access start time.

[0185] As an example, when the first condition information includes predetermined time condition information, the predetermined time condition information includes a predetermined time parameter, and the TA enabling condition includes that the current time of the terminal device is within a first time range, and the first time range is a time range determined based on the predetermined time parameter.

[0186] In some embodiments, the preset time parameters include a first absolute time and a first time length, and the first time range may be determined by determining the first time range based on the first absolute time and the first time length.

[0187] In some embodiments, the preset time parameter may include a second time length and a first preset condition, and the first time range may be determined by setting the second time length after the terminal device meets the first preset condition as the first time range.

[0188] The first preset condition may include one or more of the following conditions:

[0189] Condition 1. The terminal device receives a first message sent by the network device.

[0190] Condition 2. The current time of the terminal device is equal to the second absolute time.

[0191] Here, the second absolute time may be a time determined based on a time parameter transmitted by the network device to the terminal device.

[0192] Condition 3. The terminal device determines that the terminal device satisfies the TA enabling condition based on the preset signal condition information.

[0193] Condition 4. The terminal device determines that the terminal device satisfies the TA enabling condition based on the preset location condition information.

[0194] When the above method is adopted, the network device may instruct the terminal device to determine whether the terminal device satisfies the TA enabling condition based on one or more of the above first condition information, and if it is determined that the terminal device satisfies the TA enabling condition, determine a target TA based on the reserved TA corresponding to the first condition information.

[0195] In some embodiments of the present disclosure, the network device may determine an uplink channel resource parameter and send a second message to the terminal device based on the uplink channel resource parameter.

[0196] Wherein, the second message may include uplink channel resource parameters, which may be used to determine a target TA used to access the target access point according to the first parameters, and then instruct the terminal device to perform uplink transmission according to the uplink channel resource parameters.

[0197] The second message may be the same as the first message or may be different.

[0198] The uplink channel resource parameters may include a parameter for indicating an uplink PUSCH resource, which may be an available PUSCH resource provided by the network device, such as a reserved PUSCH resource.

[0199] In some embodiments, the network device may instruct the terminal device to transmit an uplink RRC message based on the uplink channel resource parameter, and thus the network device can receive an uplink RRC message transmitted by the terminal device based on the uplink channel resource parameter. The uplink RRC message may include an RRC reconfiguration complete message, an RRC reconfiguration failure message, or another RRC message.

[0200] In some other embodiments, the network device may instruct the terminal device to transmit uplink data based on the uplink channel resource parameters, and in this way, the network device can receive the uplink data transmitted by the terminal device based on the uplink channel resource parameters.

[0201] In some other embodiments, the network device may instruct the terminal device to transmit an uplink RRC message and uplink data based on the uplink channel resource parameters, and in this way, the network device can receive the uplink RRC message and uplink data transmitted by the terminal device based on the uplink channel resource parameters.

[0202] In this way, when the target TA is determined, the network device can instruct the terminal device to perform uplink transmission based on the uplink channel resource parameters, thereby reducing the delay of service interruption due to handover and improving data transmission efficiency.

[0203] 7 is a process chart of an access method shown in one exemplary embodiment. As shown in FIG. 7, the method may include the following steps S701 and S702.

[0204] At S701, the network device determines a first parameter and an uplink channel resource parameter corresponding to at least one candidate access point.

[0205] At S702, the network device sends a first message to the terminal device based on the first parameter and the uplink channel resource parameter.

[0206] Here, the first message may include the first parameter and uplink channel resource parameters, and the candidate access points may include a target access point, which may include a cell and / or a beam. The first parameter corresponding to the target access point may be used to instruct a terminal device to determine a timing advance (TA) to be used for accessing the target access point. The uplink channel resource parameters corresponding to the target access point may be used to instruct a terminal device to perform uplink transmission based on the uplink channel resource parameters after determining a target TA to be used for accessing the target access point based on the first parameter.

[0207] As an example, the uplink channel resource parameters may include parameters for indicating uplink PUSCH resources.

[0208] In this way, the network device can instruct the terminal device to access the target access point based on the target TA and the target uplink channel resource, thereby further reducing the delay of service interruption due to handover and improving data transmission efficiency.

[0209] 8 is a process chart of an access method shown in one exemplary embodiment. As shown in FIG. 8, the method may include the following steps S801 to S805.

[0210] At S801, the network device determines a first parameter corresponding to at least one candidate access point.

[0211] Here, the candidate access points may include a target access point, and the access point may include a cell and / or a beam. A first parameter corresponding to the target access point may be used to instruct a terminal device to determine a timing advance (TA) to be used for accessing the target access point.

[0212] At S802, the network device sends a first message to the terminal device based on the first parameter.

[0213] At S803, the terminal device determines a first parameter corresponding to at least one candidate access point in response to receiving a first message sent by the network device.

[0214] In S804, when the target access point to be accessed is determined, the terminal device determines a target timing advance (TA) to be used for accessing the target access point based on the first parameter.

[0215] In S805, the terminal device accesses the target access point based on the target TA.

[0216] Note that the specific implementation forms of the above steps can be referred to in the descriptions of the above embodiments of the present disclosure, and therefore will not be described in detail here.

[0217] In this way, the terminal device can determine the target TA based on the first parameter sent by the network device, and access the target access point based on the target TA, thereby saving the time required to determine the target TA through the random access process, reducing the handover delay, and improving the data transmission efficiency in the handover process.

[0218] 9 is a block diagram of an access device 900 shown in one exemplary embodiment, which can be applied to a terminal device. As shown in FIG. 9, the device 900 includes: a first determination module 901 configured to determine first parameters corresponding to at least one candidate access point, the candidate access point including a target access point, the access point including a cell and / or a beam; a second determination module 902 configured to determine a target timing advance (TA) to be used in accessing the target access point based on the first parameter; and an access module 903 configured to access the target access point based on the target TA.

[0219] In some embodiments, the first determination module 901 is configured to receive a first message transmitted by a network device, the first message including the first parameters corresponding to at least one of the candidate access points.

[0220] In some embodiments, the first parameters include an access point identifier of at least one of the candidate access points and an access point TA parameter corresponding to each of the access point identifiers, and the second determination module 902 is configured to determine a target access point TA parameter corresponding to a target access point identifier based on the first parameters, where the target access point identifier is an access point identifier corresponding to the target access point to be accessed, and to determine the target TA based on the target access point TA parameter.

[0221] In some embodiments, the target access point TA parameters include at least one reserved TA and first condition information corresponding to the reserved TA, and the second determination module 902 is configured to determine whether the terminal device satisfies a TA enabling condition based on the first condition information, and if it is determined that the terminal device satisfies the TA enabling condition, determine the target TA based on the reserved TA corresponding to the first condition information.

[0222] In some embodiments, the first condition information is: preset signal condition information for instructing the terminal device to determine whether the terminal device satisfies the TA enabling condition based on the wireless signal strength of the detected target access point; Pre-set location condition information for instructing the terminal device to determine whether the terminal device satisfies the TA enabling condition based on location information of the terminal device; and preset time condition information for instructing the terminal device to determine whether the terminal device satisfies the TA enabling condition based on an access start time.

[0223] In some embodiments, when the first condition information includes the preset signal condition information, the TA enabling condition includes that the wireless signal strength is within a target signal strength range, and the target signal strength range is a signal strength range determined based on the preset signal condition information.

[0224] In some embodiments, when the first condition information includes preset location condition information, the preset location condition information includes at least one first reserved cell, and the TA enabling condition includes that a serving cell of the terminal device is included in the at least one first reserved cell.

[0225] In some embodiments, when the first condition information includes predetermined location condition information, the predetermined location condition information includes at least one second reserved cell and a first distance parameter corresponding to each of the second reserved cells, and the TA enabling condition includes that a first distance between the terminal device and an antenna corresponding to the second reserved cell is less than or equal to a first distance threshold, and the first distance threshold is a distance threshold determined based on the first distance parameter.

[0226] In some embodiments, when the first condition information includes predetermined location condition information, the predetermined location condition information includes a predetermined location parameter and a second distance parameter, the TA enabling condition includes that a second distance between the terminal device and the predetermined location is less than or equal to a second distance threshold, the predetermined location is a geographical location determined based on the predetermined location parameter, and the second distance threshold is a distance threshold determined based on the second distance parameter.

[0227] In some embodiments, when the first condition information includes predetermined time condition information, the predetermined time condition information includes a predetermined time parameter, and the TA enabling condition includes that the current time of the terminal device is within a first time range, and the first time range is a time range determined based on the predetermined time parameter.

[0228] In some embodiments, the preset time parameters include a first absolute time and a first time length, and the first time range is: The first time range is determined based on the first absolute time and the first time length.

[0229] In some embodiments, the preset time parameter comprises a second time length, and the first time range comprises: The first time range is determined by a method in which a second time length after the terminal device satisfies the first preset condition is set as the first time range; Here, the first preset condition is: a condition for receiving the first message sent by a network device; a condition that the current time of the terminal device is equal to a second absolute time, the second absolute time being a time received by the terminal device from the network device; A condition for determining that the terminal device satisfies the TA enabling condition based on the preset signal condition information; and The predetermined location condition information includes one or more conditions for determining that the terminal device satisfies the TA enabling condition.

[0230] In some embodiments, the access point TA parameter includes an access point TA length or an access point Timing Advance Group (TAG) identifier, and determining the target access point TA parameter corresponding to the target access point identifier based on the first parameter includes: determining a target TA length corresponding to a target access point identifier based on the access point TA parameters;

[0231] 10 is a block diagram of an access device 900 shown in one exemplary embodiment. As shown in FIG. 10, the device 900 may further include a first determination module 901; The first determining module 901 is further configured to determine an uplink channel resource parameter; The transmission module 904 is further configured to perform uplink transmission based on the uplink channel resource parameter when a target TA to be used for accessing the target access point is determined based on the first parameter.

[0232] In some embodiments, the first determining module 901 is configured to receive a second message sent by a network device, the second message including the uplink channel resource parameters.

[0233] In some embodiments, the transmission module 904 is configured to transmit an uplink radio resource control (RRC) message based on the uplink channel resource parameters and / or to transmit uplink data based on the uplink channel resource parameters.

[0234] In some embodiments, the access module 903 is configured to access the target access point based on a random access channel-less (RACH-less) scheme based on the target TA.

[0235] 11 is a block diagram of an access device 1100 shown in one exemplary embodiment, which can be applied to a terminal device. As shown in FIG. 11, the device 1100 includes: a third determining module 1101 configured to determine a first parameter corresponding to at least one candidate access point, the candidate access point including a target access point; The first transmission module 1102 may include a first transmission module configured to transmit a first message to a terminal device based on the first parameter, the first message including the first parameter, which when attempting to access a target access point, is used to determine a target timing advance (TA) to be used in accessing the target access point and to instruct the terminal device to access the target access point based on the target TA, the access point including a cell and / or a beam.

[0236] In some embodiments, the third determination module 1101 is configured to determine an access point identifier of at least one candidate access point, determine an access point TA parameter corresponding to each of the access point identifiers, and obtain a first parameter based on the access point identifier and the access point TA parameter.

[0237] In some embodiments, the third determination module 1101 is configured to obtain at least one reserved TA corresponding to the access point identifier, determine first condition information corresponding to each of the reserved TAs, and determine the access point TA parameters based on the reserved TAs and the first condition information.

[0238] In some embodiments, the first condition information is: preset signal condition information for instructing the terminal device to determine whether the terminal device satisfies the TA enabling condition based on the wireless signal strength of the detected target access point; Pre-set location condition information for instructing the terminal device to determine whether the terminal device satisfies the TA enabling condition based on location information of the terminal device; and preset time condition information for instructing the terminal device to determine whether the terminal device satisfies the TA enabling condition based on an access start time.

[0239] In some embodiments, when the first condition information includes the preset signal condition information, the TA enabling condition includes that the wireless signal strength of the target access point detected by the terminal device is within a target signal strength range, and the target signal strength range is a signal strength range determined based on the preset signal condition information.

[0240] In some embodiments, when the first condition information includes preset location condition information, the preset location condition information includes at least one first reserved cell, and the TA enabling condition includes that a serving cell of the terminal device is included in the at least one first reserved cell.

[0241] In some embodiments, when the first condition information includes predetermined location condition information, the predetermined location condition information includes at least one second reserved cell and a first distance parameter corresponding to each of the second reserved cells, and the TA enabling condition includes that a first distance between the terminal device and an antenna corresponding to the second reserved cell is less than or equal to a first distance threshold, and the first distance threshold is a distance threshold determined based on the first distance parameter.

[0242] In some embodiments, when the first condition information includes predetermined location condition information, the predetermined location condition information includes a predetermined location parameter and a second distance parameter, the TA enabling condition includes that a second distance between the terminal device and the predetermined location is less than or equal to a second distance threshold, the predetermined location is a geographical location determined based on the predetermined location parameter, and the second distance threshold is a distance threshold determined based on the second distance parameter.

[0243] In some embodiments, when the first condition information includes predetermined time condition information, the predetermined time condition information includes a predetermined time parameter, and the TA enabling condition includes that the current time of the terminal device is within a first time range, and the first time range is a time range determined based on the predetermined time parameter.

[0244] In some embodiments, the access point TA parameters include an access point TA length or an access point Timing Advance Group (TAG) identifier.

[0245] 12 is a block diagram of an access device 1100 shown in one exemplary embodiment. As shown in FIG. 12, the device 1100 may further include a fourth determination module 1103, The fourth determining module 1103 is further configured to determine an uplink channel resource parameter; The first transmitting module 1102 is further configured to send a second message to a terminal device based on the uplink channel resource parameters, the second message including the uplink channel resource parameters, which are used to determine a target TA used to access the target access point based on the first parameters, and then instruct the terminal device to perform uplink transmission based on the uplink channel resource parameters.

[0246] Regarding the apparatus in the above embodiment, the specific manner in which each module performs an operation has been described in detail in the embodiment relating to this method, and will not be described in detail here.

[0247] 13 is a block diagram of an access device 2000 shown in one exemplary embodiment. The access device 2000 may be a terminal device in the communication system shown in FIG. 1 or a network device in the communication system.

[0248] Referring to FIG. 13, the device 2000 may include one or more of the following components: a processing component 2002 , a memory 2004 , and a communication component 2006 .

[0249] The processing component 2002 may be used to control the overall operation of the device 2000, such as display, telephone calls, data communications, camera operation, and recording operation. The processing component 2002 may include one or more processors 2020 that execute instructions to complete all or some of the steps of the access method described above. Furthermore, the processing component 2002 may include one or more modules to facilitate interaction between the processing component 2002 and other components. For example, the processing component 2002 may include a multimedia module to facilitate interaction between the processing component 2002 and a multimedia component.

[0250] Memory 2004 is configured to store various types of data to support operation on device 2000. Examples of this data include instructions for any applications or methods operating on device 2000, contact data, phone book data, messages, images, videos, etc. Memory 2004 may be implemented by any type of volatile or non-volatile storage device, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk, or a combination thereof.

[0251] The communication component 2006 is configured to facilitate wired or wireless communication between the device 2000 and other devices. The device 2000 may access a wireless network based on communication standards such as Wi-Fi, 2G, 3G, 4G, 5G, 6G, NB-IOT, eMTC, or a combination thereof. In one exemplary embodiment, the communication component 2006 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the communication component 2006 further includes a near-field communication (NFC) module to facilitate near-field communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0252] In an exemplary embodiment, the apparatus 2000 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above access methods.

[0253] The apparatus 2000 may be an independent electronic device or part of an independent electronic device. For example, in one embodiment, the electronic device may be an integrated circuit (IC) or chip, where the integrated circuit may be a single IC or a collection of ICs. The chip may be a graphics processing unit (GPU), a central processing unit (CPU), a field programmable gate array (FPGA), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a system on chip (SOC), or the like. The integrated circuit or chip may be used to execute executable instructions (or code) to implement the access method. The executable instructions may be stored on the integrated circuit or chip or may be obtained from another device, for example, the integrated circuit or chip may include a processor, memory, and an interface for communicating with other devices. The executable instructions may be stored in the processor, and when executed by the processor, the executable instructions implement the above access method, or the integrated circuit or chip may receive executable instructions via the interface and send them to the processor for execution to implement the above access method.

[0254] In an exemplary embodiment, the present disclosure further provides a computer-readable storage medium having computer program instructions stored thereon, which, when executed by a processor, implement the steps of the access method according to the present disclosure. As an example, the computer-readable storage medium may be a non-transitory computer-readable storage medium containing instructions, such as the memory 2004 described above containing instructions, which may be executed by the processor 2020 of the device 2000 to complete the access method. For example, the non-transitory computer-readable storage medium may be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0255] In some other embodiments, a computer program product is further provided, the computer program product including a computer program executable by a programmable device, the computer program having code portions for performing the access method when executed by the programmable device.

[0256]

[0013] Other embodiments of the present disclosure will readily occur to those skilled in the art after studying the specification and practicing the present disclosure. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common sense or customary technical means known in the art but not disclosed in the present disclosure. The specification and examples are considered to be exemplary, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0257] It is to be understood that the present disclosure is not limited to the exact construction described above and shown in the drawings, and that various modifications and variations are possible without departing from the scope thereof, which is limited only by the appended claims.

Claims

1. 1. An access method applied to a terminal device, said method comprising: determining a first parameter corresponding to at least one candidate access point, the candidate access point including a target access point, the access point being a cell and / or a beam; determining a target timing advance (TA) to be used in accessing the target access point based on the first parameter; and accessing the target access point based on the target TA. An access method characterized by:

2. The step of determining a first parameter corresponding to the at least one candidate access point comprises: receiving a first message transmitted by a network device, the first message including the first parameters corresponding to at least one of the candidate access points; 2. The access method according to claim 1.

3. the first parameters include an access point identifier of at least one of the candidate access points and an access point TA parameter corresponding to each of the access point identifiers; determining a target timing advance (TA) to be used for accessing the target access point based on the first parameter, determining a target access point TA parameter corresponding to a target access point identifier based on the first parameter, wherein the target access point identifier is an access point identifier corresponding to the target access point to be accessed; determining the target TA based on the target access point TA parameters; 2. The access method according to claim 1.

4. The target access point TA parameters include at least one reserved TA and first condition information corresponding to the reserved TA; determining the target TA based on the target access point TA parameters, determining whether the terminal device satisfies a TA activation condition based on the first condition information; If it is determined that the terminal device satisfies a TA enabling condition, determining the target TA based on a reserved TA corresponding to the first condition information.

4. The access method according to claim 3.

5. The first condition information is preset signal condition information for instructing the terminal device to determine whether the terminal device satisfies the TA activation condition based on the wireless signal strength of the detected target access point; Pre-set location condition information for instructing the terminal device to determine whether the terminal device satisfies the TA validation condition based on location information of the terminal device; and predetermined time condition information for instructing the terminal device to determine whether the terminal device satisfies the TA validation condition based on an access start time.

5. The access method according to claim 4.

6. When the first condition information includes the predetermined signal condition information, the TA activation condition includes that the wireless signal strength is within a target signal strength range, and the target signal strength range is a signal strength range determined based on the predetermined signal condition information.

6. The access method according to claim 5.

7. When the first condition information includes preset location condition information, the preset location condition information includes at least one first reserved cell, and the TA activation condition includes that a serving cell of the terminal device is included in the at least one first reserved cell.

6. The access method according to claim 5.

8. When the first condition information includes predetermined location condition information, the predetermined location condition information includes at least one second reserved cell and a first distance parameter corresponding to each of the second reserved cells, and the TA enabling condition includes that a first distance between the terminal device and an antenna corresponding to the second reserved cell is equal to or less than a first distance threshold, and the first distance threshold is a distance threshold determined based on the first distance parameter.

6. The access method according to claim 5.

9. If the first condition information includes predetermined location condition information, the predetermined location condition information includes a predetermined location parameter and a second distance parameter, the TA enabling condition includes that a second distance between the terminal device and the predetermined location is equal to or less than a second distance threshold, the predetermined location is a geographical location determined based on the predetermined location parameter, and the second distance threshold is a distance threshold determined based on the second distance parameter.

6. The access method according to claim 5.

10. If the first condition information includes predetermined time condition information, the predetermined time condition information includes a predetermined time parameter, and the TA enabling condition includes that a current time of the terminal device is within a first time range, and the first time range is a time range determined based on the predetermined time parameter.

6. The access method according to claim 5.

11. The preset time parameters include a first absolute time and a first time length, and the first time range is: The first time range is determined based on the first absolute time and the first time length. The access method according to claim 10.

12. The predetermined time parameter includes a second time length, and the first time range includes: The first time range is determined by a method in which a second time length after the terminal device satisfies the first preset condition is set as the first time range; The first preset condition is: a condition for receiving the first message sent by a network device; a condition that the current time of the terminal device is equal to a second absolute time, the second absolute time being a time received by the terminal device from the network device; A condition for determining that the terminal device satisfies the TA activation condition based on the preset signal condition information; and The predetermined location condition information includes one or more conditions for determining that the terminal device satisfies the TA enabling condition. The access method according to claim 10.

13. The access point TA parameters include an access point TA length or an access point Timing Advance Group (TAG) identifier; determining a target access point TA parameter corresponding to a target access point identifier based on the first parameter, determining a target TA length corresponding to a target access point identifier based on the access point TA parameters; 4. The access method according to claim 3.

14. The method comprises: determining uplink channel resource parameters; When a target TA to be used for accessing the target access point is determined based on the first parameter, performing uplink transmission based on the uplink channel resource parameter.

2. The access method according to claim 1.

15. The step of determining uplink channel resource parameters comprises: receiving a second message transmitted by a network device, the second message including the uplink channel resource parameters; 15. The access method according to claim 14.

16. performing uplink transmission based on the uplink channel resource parameter, transmitting an uplink Radio Resource Control (RRC) message based on the uplink channel resource parameters; and / or transmitting uplink data based on the uplink channel resource parameters.

15. The access method according to claim 14.

17. The step of accessing the target access point based on the target TA includes: accessing the target access point based on the target TA in a random access channel-less (RACH-less) manner; 17. The access method according to any one of claims 1 to 16.

18. 1. An access method applied to a network device, the method comprising: determining a first parameter corresponding to at least one candidate access point, the candidate access point including a target access point, the access point including a cell and / or a beam; transmitting a first message to a terminal device based on the first parameter, the first message including the first parameter, the first parameter being used to determine a target timing advance (TA) to be used in accessing the target access point when attempting to access the target access point, and to instruct the terminal device to access the target access point based on the target TA; An access method characterized by:

19. The step of determining a first parameter corresponding to the at least one candidate access point comprises: determining an access point identifier for at least one of the candidate access points; determining access point TA parameters corresponding to each said access point identifier; and obtaining a first parameter based on the access point identifier and the access point TA parameter.

20. The access method according to claim 18.

20. The step of determining access point TA parameters corresponding to each said access point identifier comprises: obtaining at least one reserved TA corresponding to the access point identifier; determining first condition information corresponding to each of the reserved TAs; determining the access point TA parameters based on the reserved TA and the first condition information; 20. The access method according to claim 19.

21. The first condition information is preset signal condition information for instructing the terminal device to determine whether the terminal device satisfies a TA activation condition based on the wireless signal strength of the detected target access point; Pre-set location condition information for instructing the terminal device to determine whether the terminal device satisfies the TA validation condition based on location information of the terminal device; and predetermined time condition information for instructing the terminal device to determine whether the terminal device satisfies the TA validation condition based on an access start time.

21. The access method according to claim 20.

22. When the first condition information includes the preset signal condition information, the TA enabling condition includes that the wireless signal strength of the target access point detected by the terminal device is within a target signal strength range, and the target signal strength range is a signal strength range determined based on the preset signal condition information.

22. The access method according to claim 21.

23. When the first condition information includes preset location condition information, the preset location condition information includes at least one first reserved cell, and the TA activation condition includes that a serving cell of the terminal device is included in the at least one first reserved cell.

22. The access method according to claim 21.

24. When the first condition information includes predetermined location condition information, the predetermined location condition information includes at least one second reserved cell and a first distance parameter corresponding to each of the second reserved cells, and the TA enabling condition includes that a first distance between the terminal device and an antenna corresponding to the second reserved cell is equal to or less than a first distance threshold, and the first distance threshold is a distance threshold determined based on the first distance parameter.

22. The access method according to claim 21.

25. If the first condition information includes predetermined location condition information, the predetermined location condition information includes a predetermined location parameter and a second distance parameter, the TA enabling condition includes that a second distance between the terminal device and the predetermined location is equal to or less than a second distance threshold, the predetermined location is a geographical location determined based on the predetermined location parameter, and the second distance threshold is a distance threshold determined based on the second distance parameter.

22. The access method according to claim 21.

26. If the first condition information includes predetermined time condition information, the predetermined time condition information includes a predetermined time parameter, and the TA enabling condition includes that a current time of the terminal device is within a first time range, and the first time range is a time range determined based on the predetermined time parameter.

22. The access method according to claim 21.

27. The access point TA parameters include an access point TA length or an access point Timing Advance Group (TAG) identifier.

20. The access method according to claim 19.

28. The method comprises: determining uplink channel resource parameters; and further comprising: sending a second message to a terminal device based on the uplink channel resource parameter, the second message including the uplink channel resource parameter, the uplink channel resource parameter being used to instruct the terminal device to perform uplink transmission based on the uplink channel resource parameter after a target TA used to access the target access point is determined based on the first parameter. The access method according to any one of claims 18 to 27.

29. 1. An access apparatus adapted for a terminal device, the apparatus comprising: a first determination module configured to determine a first parameter corresponding to at least one candidate access point, the candidate access point including a target access point, the access point being a cell and / or a beam; a second determination module configured to determine a target timing advance (TA) to be used in accessing the target access point based on the first parameter; an access module configured to access the target access point based on the target TA; An access device characterized by:

30. 1. An access device applied to a network device, the device comprising: a third determination module configured to determine a first parameter corresponding to at least one candidate access point, the candidate access point including a target access point; a first transmission module configured to transmit a first message to a terminal device based on the first parameter, the first message including the first parameter, the first parameter being used to determine a target timing advance (TA) to be used in accessing the target access point when attempting to access the target access point, and to instruct the terminal device to access the target access point based on the target TA, the access point being a cell and / or a beam; An access device characterized by:

31. An access device, a processor; a memory for storing instructions executable by the processor; The processor is configured to perform the steps of the access method according to any one of claims 1 to 17, or the processor is configured to perform the steps of the access method according to any one of claims 18 to 28. An access device characterized by:

32. A computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the access method of any one of claims 1 to 17, or which, when executed by a processor, implement the steps of the access method of any one of claims 18 to 28. A computer-readable storage medium comprising:

33. A chip, a processor and an interface, The processor executes the steps of the access method according to any one of claims 1 to 17 by reading instructions, or the processor executes the steps of the access method according to any one of claims 18 to 28 by reading instructions. A chip characterized by:

Images