Cell access processing method and apparatus, and device and medium

Abstract

The embodiments of the present disclosure relate to a cell access processing method and apparatus, and a device and a medium. The method comprises: determining a target cell and / or a target beam from among candidate cells and / or candidate beams that meet a preset execution condition; and if it is determined that the target cell and / or the target beam meets a preset access condition, triggering access to the target cell and / or the target beam in a random access channel (RACH)-less manner. In the present technical solution, whether to access a target cell and / or a target beam in a RACH-less manner is determined at a terminal device side, thereby reducing the implementation complexity at a network side during cell access processing.

Description

Community access processing methods, devices, equipment and media

[0001] This disclosure claims priority to Chinese Patent Application No. 202411973881.5, filed with the Chinese Patent Office on December 30, 2024, entitled “Cell Access Processing Method, Apparatus, Device and Medium”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of communication technology, and in particular to a cell access processing method, apparatus, device and medium. Background Technology

[0003] Cell change execution based on user equipment (UE) evaluation can be implemented, supporting cell changes based on both random access channel (RACH) and random access channel-less (RACH-less) methods.

[0004] In related technologies, since cell changes are performed based on UE assessment, the terminal device decides the access time, cell, and beam. However, the network side does not know when the terminal device performs the cell change, nor does it know which cell or beam the terminal device will access from. Therefore, the network side needs to start detecting pre-configured uplink resources or dynamically scheduling the terminal device from the provision of pre-configuration information to enable UEs to access in RACH-less mode, etc. However, this access method introduces high complexity to the network side implementation. Summary of the Invention

[0005] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this disclosure provides a cell access processing method, apparatus, equipment and medium.

[0006] This disclosure provides a cell access processing method applied to a terminal device, comprising: determining a target cell and / or a target beam from candidate cells and / or candidate beams that meet preset execution conditions; and if the target cell and / or the target beam is determined to meet preset access conditions, triggering access to the target cell and / or the target beam in a RACH-less manner.

[0007] This disclosure provides a cell access processing method applied to a first base station, comprising: sending indication information to a second base station, wherein the indication information is used to indicate at least one candidate cell and / or candidate beam for a terminal device of the second base station; and / or receiving a notification message sent by the second base station, wherein the notification message is used to indicate whether the terminal device supports at least one candidate cell and / or candidate beam for performing RACH-less access.

[0008] This disclosure provides a cell access processing method applied to a second base station, comprising: receiving indication information sent by a first base station, wherein the indication information is used to indicate at least one candidate cell and / or candidate beam for a terminal device of the second base station; and / or sending a notification message to the first base station, wherein the notification message is used to indicate whether the terminal device supports at least one candidate cell and / or candidate beam for performing RACH-less access.

[0009] This disclosure also provides a terminal device, comprising: a memory, a transceiver, and a processor; the memory for storing a computer program; the transceiver for transmitting and receiving data under the control of the processor; and the processor for reading the computer program in the memory and performing the following operations: determining a target cell and / or a target beam from candidate cells and / or candidate beams that meet preset execution conditions; and if the target cell and / or the target beam is determined to meet preset access conditions, triggering access to the target cell and / or the target beam in a RACH-less manner.

[0010] This disclosure also provides a first base station, including a memory, a transceiver, and a processor: the memory for storing a computer program; the transceiver for transmitting and receiving data under the control of the processor; and the processor for reading the computer program in the memory and performing the following operations: sending indication information to a second base station, wherein the indication information is used to indicate at least one candidate cell and / or candidate beam for a terminal device of the second base station; and / or receiving a notification message sent by the second base station, wherein the notification message is used to indicate whether the terminal device supports at least one candidate cell and / or candidate beam for performing RACH-less access.

[0011] This disclosure also provides a second base station, the second base station including a memory, a transceiver, and a processor: the memory for storing a computer program; the transceiver for transmitting and receiving data under the control of the processor; the processor for reading the computer program in the memory and performing the following operations: receiving indication information sent by a first base station, wherein the indication information is used to indicate at least one candidate cell and / or candidate beam of the second base station terminal device; and / or sending a notification message to the first base station, wherein the notification message is used to indicate whether the terminal device supports at least one candidate cell and / or candidate beam for performing RACH-less access.

[0012] This disclosure also provides a cell access processing apparatus, which is applied to a terminal device and includes: a determination module, configured to determine a target cell and / or a target beam from candidate cells and / or candidate beams that meet preset execution conditions; and an access processing module, configured to trigger access to the target cell and / or the target beam in a RACH-less manner if it is determined that the target cell and / or the target beam meets preset access conditions.

[0013] This disclosure also provides a cell access processing apparatus, applied to a first base station, comprising: a first transmitting module for transmitting indication information to a second base station, wherein the indication information is used to indicate at least one candidate cell and / or candidate beam for a terminal device of the second base station; and / or a first receiving module for receiving a notification message sent by the second base station, wherein the notification message is used to indicate whether the terminal device supports at least one candidate cell and / or candidate beam for performing RACH-less access.

[0014] This disclosure also provides a cell access processing apparatus applied to a second base station, comprising: a second receiving module for receiving indication information sent by a first base station, wherein the indication information is used to indicate at least one candidate cell and / or candidate beam for a terminal device of the second base station; and / or a second sending module for sending a notification message to the first base station, wherein the notification message is used to indicate whether the terminal device supports at least one candidate cell and / or candidate beam for performing RACH-less access.

[0015] This disclosure provides a processor-readable storage medium storing a program for causing the processor to execute the aforementioned cell access processing method.

[0016] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0017] The cell access processing scheme provided in this disclosure determines the target cell and / or target beam from candidate cells and / or candidate beams that meet preset execution conditions. If the target cell and / or target beam meets the preset access conditions, it triggers access to the target cell and / or target beam in a RACH-less manner. In this technical solution, the decision on whether to access the target cell and / or target beam in a RACH-less manner is realized on the terminal device side, reducing the implementation complexity on the network side during cell access processing. Attached Figure Description

[0018] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0019] Figure 1 is a flowchart of a cell access processing method provided in an embodiment of this disclosure;

[0020] Figure 2 is a flowchart of a cell access processing method according to another embodiment of the present disclosure;

[0021] Figure 3 is a flowchart of a cell access processing method according to another embodiment of the present disclosure;

[0022] Figure 4 is a schematic diagram of the structure of a terminal device according to an embodiment of the present disclosure;

[0023] Figure 5 is a schematic diagram of the structure of a first base station or a second base station proposed in this disclosure;

[0024] Figure 6 is a schematic diagram of a cell access processing apparatus according to an embodiment of the present disclosure;

[0025] Figure 7 is a schematic diagram of a cell access processing apparatus according to another embodiment of the present disclosure;

[0026] Figure 8 is a structural schematic diagram of a cell access processing apparatus according to yet another embodiment of the present disclosure. Detailed Implementation

[0027] In this disclosure, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0028] In this disclosure, the term "multiple" refers to two or more, and other quantifiers are similar.

[0029] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0030] The technical solutions provided in this disclosure can be applied to a variety of systems. For example, applicable systems may include Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, Long Term Evolution Advanced (LTE-A) systems, Universal Mobile Telecommunications System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) systems, 5G New Radio (NR) systems and their evolved communication systems, and 6G (sixth generation mobile communication technology) systems. These systems may include terminal equipment and network equipment. The systems may also include a core network component, such as the Evolved Packet Core (EPC) or the 5G Core Network (5GC).

[0031] The terminal devices involved in the embodiments of this disclosure can be devices that provide voice and / or data connectivity to users, handheld devices with wireless connectivity, or other processing devices connected to a wireless modem. The names of the terminal devices may differ in different systems; for example, in 5G or 6G systems, the terminal device may be called User Equipment (UE). Wireless terminal devices can be USB storage devices, other personal computer memory devices, and dongles. They can also communicate with one or more core networks (CNs) via a Radio Access Network (RAN). Wireless terminal devices can be mobile terminal devices, such as mobile phones (or "cellular" phones) and computers with mobile terminal devices. For example, they can be portable, pocket-sized, handheld, computer-embedded, or vehicle-mounted mobile devices that exchange voice and / or data with the radio access network. Examples of such devices include Personal Communication Service (PCS) telephones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), personal computers, tablets, and Machine-type Communication (MTC) terminal devices. Wireless terminal devices can also be referred to as systems, subscriber units, subscriber stations, mobile stations, mobile devices, remote stations, access points, remote terminals, access terminals, user terminals, user agents, user devices, and wireless access devices and routers / modems that meet the limitations of this definition, but are not limited to these in the embodiments of this disclosure.

[0032] The network device involved in this disclosure can be a base station, which may include multiple cells providing services to terminals. Depending on the specific application, the base station may also be called an access point, or a device in the access network that communicates with wireless terminal devices through one or more sectors on the air interface, or other names. The network device can be used to exchange received air frames with Internet Protocol (IP) packets, acting as a router between the wireless terminal device and the rest of the access network, where the rest of the access network may include an Internet Protocol (IP) communication network. The network device can also coordinate the attribute management of the air interface. For example, the network device involved in this disclosure can be an evolved Node B (eNB or e-NodeB) in a long term evolution (LTE) system, a 5G base station (gNB) in a next generation system, or a Home evolved Node B (HeNB), relay node, femto, pico, network testing equipment, etc., and is not limited in this disclosure. In some network architectures, network devices may include centralized unit (CU) nodes and distributed unit (DU) nodes, which may also be geographically separated.

[0033] In existing 5G technologies, the Release 18 (R18) mobility enhancement project studied Layer 1 (L1) or Layer 2 (L2) triggered low-latency mobility (L1 / L2 Triggered Mobility, LTM) mechanisms. This involves the base station sending L1 / L2 commands to notify the terminal device (UE) to perform a serving cell change. In R18's LTM mechanism, the network side decides on cell changes based on measurement results reported by the UE. The network pre-configures the candidate cell configuration information to the UE, and simultaneously configures relevant candidate cell measurement reference signal information and pre-synchronization information for the UE. The UE performs L1 measurements of neighboring cells based on the configured candidate cell measurement reference signals and reports the results to the network side. The source cell can make a cell change decision based on the L1 measurement results of the candidate cells reported by the UE and notify the UE to perform the cell change by sending a MAC CE signaling (which can be an LTM cell switch command MAC CE) to trigger the UE to perform the cell change. After receiving this LTM cell switch command MAC CE, the UE applies the configuration information of the candidate cell specified in the MAC CE to access the target cell. That is, in the LTM mechanism, the network side decides whether to change the target cell.

[0034] 5G Release 19 will support Conditional LTM, a method for determining cell changes based on UE evaluation. Conditional LTM supports RACH-based access and RACH-less access. The network pre-configures candidate cell configuration information, measurement-related information, and associated execution conditions for the UE. The UE evaluates the execution conditions, and performs LTM cell changes when at least one candidate cell or candidate beam meets the conditions.

[0035] 6G or subsequent communication protocols can consider supporting cell change execution based on UE evaluation. This means the UE determines the timing of the cell change and the target cell and / or target beam, or target frequency, and / or target carrier frequency, and / or target access bandwidth, etc., based on configured execution conditions. This determines the target frequency domain range for access. The cell change can occur within the same cell or different cells. In the case of the same cell, it can trigger a change in the intra-cell serving frequency domain range. After determining the above access targets, the UE determines whether to access in RACH-less or RACH mode, and the network side determines the UE's access method accordingly.

[0036] It should be emphasized that the application scenarios in the embodiments of this disclosure are based solely on conditional LTM, but are not limited to conditional LTM. That is, they are applicable to any communication technology such as 5G and 6G. The following embodiments use a target cell or target beam as an example, but are equally applicable to target frequency points, and / or target carrier frequencies, and / or target access bandwidth, and any scenario or technical term that can determine the frequency domain range of the target can be substituted. The following embodiments use a target beam as an example, but are not limited to beams; any scenario or technical term that can determine the spatial division relationship of access can be substituted.

[0037] However, as mentioned above, the network side does not know when the terminal device will perform a cell change, nor does it know which cell (or bandwidth range, etc.) the terminal device is in or which beam it is accessing. Therefore, the network side needs to start detecting pre-configured uplink resources or dynamically scheduling the terminal device after providing pre-configuration information to enable the UE to access in RACH-less mode, etc. However, this access method will bring high complexity to the implementation on the network side.

[0038] To address the aforementioned technical issues, embodiments of this disclosure implement a UE-side decision on whether to access the target cell and / or target beam in a RACH-less manner. On the network side, the network can determine the cell, beam, and / or timing for RACH-LESS access.

[0039] The following describes the cell access processing method of this disclosure embodiment with reference to specific embodiments, focusing first on the terminal device side.

[0040] Figure 1 is a flowchart of a cell access processing method provided in an embodiment of this disclosure. The method is applied to a terminal device. As shown in Figure 1, the method includes:

[0041] Step 101: Determine the target cell and / or target beam from the candidate cells and / or candidate beams that meet the preset execution conditions.

[0042] It should be noted that the preset execution conditions in this embodiment are used to determine whether candidate cells and / or candidate beams meet the execution conditions for cell change. These execution conditions can be based on cell-level conditions, beam-level conditions, bandwidth-level conditions, frequency band-level conditions, carrier frequency-level conditions, or other conditions specifying a frequency domain range or frequency band. The evaluation content can be at least one of the following: measurement results of reference signals, time conditions, geographical location conditions, etc. The following embodiments use the evaluation of reference signal measurement results as an example, but are not limited thereto. The configuration information executed after the execution conditions are met can be configuration information for a cell, a beam within a cell, a specified frequency domain range, or a specified frequency band.

[0043] It should be noted that the candidate beam and target beam in the embodiments of this disclosure may refer to the associated reference signal, such as SSB, CSI-RS, or a determined transmission configuration indication TCI state, etc., which can determine the transmission spatial division relationship. There are no restrictions here.

[0044] In one embodiment of this disclosure, after determining candidate cells and / or candidate beams that meet preset execution conditions, a target cell and / or target beam are determined from these candidate cells and / or candidate beams. The preset execution conditions can be set according to the scenario of cell changes. There can be one or more target cells and / or target beams. In some possible embodiments, when only one candidate beam meets the preset execution conditions, the terminal device selects the cell containing the unique candidate beam that meets the preset execution conditions as the target cell and / or selects the unique candidate beam that meets the preset execution conditions as the target beam. When only one candidate cell meets the preset execution conditions, the terminal device selects the unique candidate cell that meets the preset execution conditions as the target cell. Of course, in actual execution, a candidate beam can also be selected as the target beam. Both the target cell and the target beam can be one or more. When there are multiple target cells or target beams, the method for determining multiple target beams and multiple target cells is the same as the method for determining one target beam and one target cell, and will not be repeated here.

[0045] In the embodiments of this disclosure, it is assumed that the network side sends signaling to configure candidate cells cell1, cell2, and cell3 for the UE. Cell1 contains candidate beams such as beam11 and beam12, cell2 contains candidate beams such as beam21 and beam22, and cell3 contains candidate beams beam31, beam32, and beam33. The UE evaluates whether the candidate cells or candidate beams meet preset execution conditions.

[0046] If the preset execution condition is the execution condition of the associated beam or the execution condition at the beam level, that is, the terminal device determines whether the preset execution condition is met by evaluating the measurement results of one or more beams. For example, assuming that the set of candidate beams that meet the preset execution condition is {beam11, beam22, beam31, beam33} or the set of candidate beams selected based on specified conditions for determining the target beam and / or target cell contains the candidate beams {beam11, beam22, beam31, beam33}, the terminal device can determine a target beam and / or target cell for access from the above beam set.

[0047] It should be emphasized that, in the embodiments of this disclosure, when there is only one candidate cell and / or candidate beam that meets the execution conditions, or when the set of candidate beams selected based on specified conditions for determining the target beam and / or target cell contains only one candidate beam and / or candidate cell, a single candidate cell and / or candidate beam can be directly determined as the target cell and / or target beam.

[0048] When there are multiple candidate cells and / or candidate beams that meet the preset execution conditions, the target cell and / or target beam can be determined from these candidate cells and / or candidate beams based on preset selection conditions. For example, if the candidate cells and / or candidate beams that meet the preset execution conditions include {beam11, beam22, beam31, beam33}, one of them can be selected as the target beam and / or one of the candidate cells contained therein as the target cell. The preset selection conditions are used to determine the target cell and / or target beam from multiple candidate cells and / or candidate beams.

[0049] In this embodiment, the method of determining the target cell and / or target beam from multiple candidate cells and / or candidate beams that meet the preset selection conditions based on preset selection conditions may include at least one of the following examples. It should be noted that when selecting the target cell and / or target beam, one possible implementation is as follows: if the selection is performed using the following multiple examples principle, the number of examples satisfied by each candidate cell and / or candidate beam can be determined, and the candidate cell and / or candidate beam with the most satisfied examples is selected as the target cell and / or target beam. If the number of examples satisfied by multiple selectable candidate cells and / or candidate beams is the same, further: among these multiple candidate cells and / or candidate beams, the candidate cell and / or candidate beam that satisfies the high-priority examples is selected first; or based on the UE implementation, one of the candidate cells and / or candidate beams is selected as the target cell and / or target beam from these multiple candidate cells and / or candidate beams. For example, if the target cell and / or target beam is selected using the principles of six examples below, where no single cell simultaneously satisfies all six principles, but beam31 satisfies the most examples, then when determining the target cell, the target cell is the cell containing beam31, i.e., cell 3, or when determining the target beam, beam31 is selected as the target beam. Alternatively, if beam31 and beam21 satisfy the same number of examples, but beam31 satisfies a higher-priority example, then beam31 is selected as the target beam, or the cell containing beam31, cell 3, is selected as the target cell. Or, if beam31 and beam21 satisfy the same number of examples, based on the UE implementation, one beam, such as beam21, is selected as the target beam, or the cell containing beam21, cell 2, is selected as the target cell.

[0050] Alternatively, another possible implementation is as follows: Priorities can be set for the following examples. When selecting a target cell and / or target beam, if multiple examples are used, and more than one candidate cell and / or candidate beam meets the highest priority, the next highest priority example is used to further determine the target cell and / or target beam until a unique or sufficient number of target cells and / or target beams are selected. For example, the eighth example below has the highest priority; beam11, beam22, and beam31 all meet the eighth example. The second highest priority example is the ninth example; beam11 and beam31 meet the ninth example. The third highest priority example is the seventh example; beam11 meets the seventh example. Therefore, beam11 is determined as the target beam or the cell cell1 where beam11 is located is the target cell. Alternatively, if there is more than one candidate cell and / or candidate beam with the highest priority, the number of examples that each candidate beam and / or candidate cell satisfies is further determined. For example, if the eighth example below has the highest priority, such as beam11, beam22, and beam31 all satisfying the eighth example, but beam11 satisfies the most examples, then beam11 is determined as the target beam or the cell cell 1 where beam11 is located is determined as the target cell. Alternatively, if there is more than one candidate cell and / or candidate beam with the highest priority (or further compared to the second or third priority, etc.), the UE implements the selection of one of the candidate cells and / or candidate beams. For example, if the eighth example below has the highest priority, such as beam11, beam22, and beam31 all satisfying the eighth example, the UE implements the selection of one candidate beam, such as beam22, from beam11, beam22, and beam31. The UE determines beam22 as the target beam or the cell cell 2 where beam22 is located is determined as the target cell. Alternatively, if the highest priority example is not satisfied, then the next highest priority example is satisfied. For example, if the highest priority selection of the beam with activated TCI (eleventh example) does not exist among the candidate beams that satisfy this example, but there is a beam that satisfies the second priority example, such as the beam included in the reported auxiliary information (seventh example), then the UE selects that beam. Of course, the above principles can also be used in combination.

[0051] In the specific implementation, the UE can use one or more candidate cells and / or candidate beams that meet the execution conditions as a candidate set for selecting the target cell and / or target beam. From the candidate set, the UE determines whether to select one or more candidate cells and / or candidate beams as the target cell and / or target beam based on at least one or more of the following examples. Alternatively, the UE can use one or more candidate cells and / or candidate beams from all one or more candidate cells and / or candidate beams as a candidate set for selecting the target cell and / or target beam according to one or more of the following examples (e.g., based on whether the execution conditions are met, based on whether TCI is activated), and further, from the candidate set, the UE determines whether to select one or more candidate cells and / or candidate beams as the target cell and / or target beam based on at least one or more of the following examples.

[0052] In specific implementations, one possible approach is for the UE to directly select the target beam, for example, by determining the target beam according to the third or eleventh example below. The UE then directly performs access on the target beam. Optionally, the cell to which the target beam belongs is the target cell. Another possible approach is for the UE to first determine the target cell, for example, by determining the target cell according to the fifth example, and then select the target beam within the target cell, for example, by selecting the target beam from multiple beams within the target cell according to the third or eleventh example. Yet another possible approach is for the UE to only determine the target cell, for example, by determining the target cell based on any of the following examples. In this approach, the network does not need to distinguish between beams. In the following embodiments, determining the target beam is taken as an example, where one target beam is a beam of a cell. Optionally, determining the target beam can simultaneously determine the target cell. The embodiments for determining the target beam can also be substituted as determining the target cell, and no separate embodiments will be written for this purpose. Separate embodiments will be provided for those that require separate determination of the target cell. This embodiment uses conditional LTM as an example, but is not limited to conditional LTM. Where beams are involved, the beam identification method can be a reference signal identifier, such as SSB index, csi-rs, etc., or a TCI-state ID, or a reference signal associated with TCI-STATE configuration, etc., without restriction.

[0053] The following are specific examples of selecting target cells and / or target beams:

[0054] In the first example, from multiple candidate cells and / or candidate beams that meet preset execution conditions, the terminal device selects a candidate cell and / or candidate beam as the target cell and / or target beam based on the implementation.

[0055] In this example, the terminal device actively selects the target cell and / or target beam from the candidate cells and / or candidate beams based on the principle of implementation, which does not restrict the specific selection.

[0056] The second example involves selecting the candidate cell and / or candidate beam with the best link quality at the current moment from multiple candidate cells and / or candidate beams that meet preset execution conditions, as the target cell and / or target beam. The link quality can be cell-level link quality, such as the result of Radio Resource Management (RRM) measurements, or beam-level measurement results. These measurements can be filtered or unfiltered, without restriction. The "current moment" can be the moment when the target cell and / or target beam are determined. Alternatively, it can be the link quality acquired at a time prior to the current moment, such as the link quality of the most recently acquired beam or cell before the current moment, to select the target cell and / or target beam.

[0057] For example, when determining the target beam, if the candidate beams include {beam11, beam22, beam31, beam33}, and beam33 has the best current link quality at the current time, then beam33 is selected as the target beam.

[0058] The third example involves selecting at least one candidate target cell and / or candidate target beam from multiple candidate cells and / or candidate beams that meet preset execution conditions, based on the auxiliary information reported by the terminal device to the network side. The candidate target cell and / or candidate target beam with the best link quality at the time the auxiliary information was reported is then selected as the target cell and / or target beam. In this embodiment, the network side can be an independent base station, which can be any base station in the communication scenario capable of processing auxiliary information. The network side can also be a centralized unit (CU) or a distributed unit (DU) of the base station.

[0059] In this example, the terminal device reports auxiliary information containing candidate target cells and / or candidate target beams. Thus, among multiple candidate beams and / or candidate cells that meet the execution conditions, at least one candidate target cell and / or candidate target beam contained in the auxiliary information reported by the terminal device to the network side is selected, and the candidate target cell and / or candidate target beam with the best link quality at the time the auxiliary information is reported is selected as the target cell and / or target beam.

[0060] Similarly, the link quality in this example can be cell-level link quality, such as the result of RRM measurement, or beam-level measurement result. It can be a filtered measurement result or an unfiltered measurement result; there are no restrictions. For example, when determining the target beam, if the candidate beams include {beam11, beam22, beam31, beam33}, and beam33 currently has the best link quality, but the auxiliary information reported by the terminal device to the network side includes candidate target cells and / or candidate target beams including {beam11, beam22, beam31}, and the candidate target beam with the best link quality at the reporting time is beam22, then beam22 is determined as the target beam. Optionally, whether to report auxiliary information can be based on network configuration.

[0061] The fourth example involves selecting the candidate cell and / or candidate beam that arrives first from a plurality of candidate cells and / or candidate beams that meet preset execution conditions as the target cell or target beam.

[0062] The pre-configured uplink resources may include the uplink resources required by the terminal device to complete access to the candidate cell.

[0063] In this embodiment, from a plurality of candidate cells and / or candidate beams that meet preset execution conditions, the candidate cell and / or candidate beam that arrives first with the pre-configured uplink resources is selected as the target cell and / or target beam. If a plurality of candidate cells and / or candidate beams do not meet the preset execution conditions, even if it arrives first, it will not be selected as the target cell or target beam.

[0064] For example, when determining the target beam, if the uplink resource of beam21, which does not meet the preset execution conditions, arrives first, and the uplink resource of beam33, which meets the preset execution conditions, arrives second, then beam33 will be taken as the target beam.

[0065] The fifth example involves identifying the cells corresponding to multiple candidate beams from among multiple candidate beams that meet preset execution conditions, and selecting the cell with the most candidate beams as the target cell based on the number of candidate beams contained in each cell.

[0066] In this example, cell selection is performed at the target cell level, and access is then executed. One possible implementation is that the terminal selects the target cell according to preset rules (e.g., determining the target cell according to the fifth example). Optionally, a target beam is selected from multiple beams within the target cell (e.g., the second example). In this example, from multiple candidate beams that meet preset execution conditions, the cells corresponding to each candidate beam are determined, and the cell with the most candidate beams is selected as the target cell based on the number of candidate beams contained in each cell. For example, if the cells corresponding to the multiple candidate beams under the preset execution conditions are cell1, cell2, and cell3, where cell1 and cell2 each have only one candidate beam that meets the preset execution conditions, and cell3 has two candidate beams that meet the preset execution conditions, then cell3 is selected as the target cell.

[0067] The sixth example involves selecting multiple candidate target beams from among multiple candidate beams that meet preset execution conditions, identifying the cells corresponding to the auxiliary information reported by the terminal device to the network side, determining the cells containing the most candidate target beams, and selecting the cell with the most candidate target beams as the target cell based on the number of candidate target beams contained in each cell.

[0068] In this example, the auxiliary information reported by the terminal device includes candidate target beams. Therefore, from multiple candidate beams that meet preset execution conditions, the multiple candidate target beams included in the auxiliary information reported by the terminal device to the network side are selected. The cells corresponding to each candidate target beam are determined, and based on the number of candidate target beams contained in each cell, the cell containing the most candidate target beams is selected as the target cell. In this example, the cell with the most candidate target beams in the auxiliary information reported to the network side will be preferentially selected as the target cell.

[0069] For example, in this example, cell selection is performed at the target cell level, and access is executed. One possible implementation is that the terminal selects the target cell according to preset rules (e.g., determining the target cell according to the sixth example). Optionally, the target beam is selected from multiple beams in the target cell (e.g., the second example). If the auxiliary information reported by the terminal device to the network side contains multiple candidate target beams as beam21, beam31, and beam22, where beam21 and beam22 correspond to cell2 and beam31 correspond to cell3, then both cell2 and cell3 have beams that meet the preset execution conditions. Even if cell3 has more beams that meet the preset execution conditions, cell2 reports more beams to the network side, so cell2 is selected as the target cell.

[0070] The seventh example involves selecting, from multiple candidate cells and / or candidate beams that meet preset execution conditions, the candidate target cell and / or candidate target beam contained in the auxiliary information reported by the terminal device to the network side as the target cell and / or target beam.

[0071] In this example, the auxiliary information includes candidate target cells and / or candidate target beams. In this example, the candidate target cells and / or candidate target beams included in the auxiliary information reported by the terminal device to the network side from multiple candidate cells and / or candidate beams that meet the preset execution conditions can be directly used as the target cell and / or target beam. The auxiliary information including candidate target cells and / or candidate target beams can be in the form of reporting the measurement results of the relevant beam or cell (in this example, the measurement results can be cell-level measurement results, such as RRM measurement results, or beam-level measurement results, which can be filtered measurement results or unfiltered measurement results, without limitation), or directly reporting beam identifiers, such as SSB index, CSI-RS index, or TCI state index. Optionally, auxiliary information can be reported, allowing the network side to determine which beams and / or cells the UE might access. For example, by reporting measurement results, the network can determine which relevant cells and / or beams the UE might access based on satisfied events and measurement results, or it can identify which beams and / or cells the UE is unlikely to access. Further details are omitted.

[0072] For example, to determine the target beam, if the candidate beams that meet the preset execution conditions are {beam11, beam22, beam31, beam33}, in this example, from the multiple candidate cells and / or candidate beams that meet the preset execution conditions, the candidate target cell and / or candidate target beam contained in the auxiliary information reported by the terminal device to the network side is selected as the target cell and / or target beam. If the auxiliary information reported by the terminal device to the network side includes beam31 and beam22 as candidate target beams, indicating to the network side that beam31 and beam22 are candidate access beams, but beam11 and beam33 are not reported to the network side in the auxiliary information, then the set of candidate beams includes beams {beam22, beam31}, meaning the UE can choose the target beam from beam22 and beam31. Alternatively, if only one beam meets the conditions, it is determined as the target beam.

[0073] The eighth example involves selecting, from multiple candidate cells and / or candidate beams that meet preset execution conditions, a candidate cell and / or a candidate beam on a candidate cell that has completed candidate configuration information preprocessing as the target cell and / or target beam.

[0074] In this example, candidate configuration information is the relevant information that needs to be configured when accessing a cell. In this embodiment, candidate cells that have completed candidate configuration information preprocessing and / or candidate beams on candidate cells that have completed candidate configuration information preprocessing can be selected as target cells and / or target beams.

[0075] For example, to determine the target beam, the candidate beams that meet the preset execution conditions are {beam11, beam22, beam31, beam33}. In this example, the candidate cells that have completed the candidate configuration information preprocessing and / or the candidate beams on the candidate cells that have completed the candidate configuration information preprocessing are selected as the target cell and / or target beam. For example, the candidate configuration information preprocessing of cell3 and cell2 has been completed, but the candidate configuration information preprocessing of cell1 has not been completed. Then the target beams included in the set of candidate beams are {beam22, beam31, beam33}, that is, the UE can select the target beam from beam22 and beam31, beam33. Alternatively, if the pre-configuration information is beam-level configuration information, then the candidate beams that meet the preset execution conditions are {beam11, beam22, beam31, beam33}. For example, if the preprocessing of the candidate configuration information of beam31 has been completed, but the preprocessing of the candidate configuration information of beam11, beam22, and beam33 has not been completed, then the target beam is determined to be beam31.

[0076] The ninth example involves selecting, from among multiple candidate cells and / or candidate beams that meet preset execution conditions, a candidate cell and / or candidate beam that the network side indicates to perform RACH-less access is selected as the target cell and / or target beam.

[0077] In this example, the network can indicate candidate cells and / or candidate beams for RACH-less access. For instance, to determine the target beam, if the network indicates that candidate beam33 can perform RACH-less access, then beam33 is selected as the target beam. The specific indication method can be included in pre-configuration information, or the network can notify the UE via separate signaling. This will not be elaborated upon or limited here.

[0078] For example, to determine the target beam, if the candidate beams that meet the preset execution conditions are {beam11, beam22, beam31, beam33}, in this example, the candidate cell and / or candidate beam that the network side indicates can perform RACH-less access is selected as the target cell and / or target beam. If the network side indicates that beam22, beam31, and beam33 can perform RACH-less access, then the set of candidate beams includes the target beam {beam22, beam31, beam33}, meaning the UE can choose the target beam from beam22 and beam31 / beam33. Alternatively, if only one beam meets the conditions, it is determined as the target beam.

[0079] The tenth example involves selecting a candidate cell and / or candidate beam that matches the current time from multiple candidate cells and / or candidate beams that meet preset execution conditions, based on the preset associated time period of the candidate cells and / or candidate beams.

[0080] In this example, the target cell and / or target beam have a preset association time period, including: an aperiodic association time period configured by the network side, wherein the start time and duration of the association time period can be determined according to configuration information, and the association time period can be set at the cell level or the beam level. Alternatively, the association time period can include a periodic association time period configured by the network side, wherein the period of the association time can be determined according to the configuration, and the start time within the period can be determined, for example, by configuring the period offset time, period, and duration, for example, the network side configures the period offset time, period, and duration to obtain a periodically occurring window, and if the current time falls within the periodically occurring window time of the candidate cell and / or candidate beam, it can be determined as the target cell or target beam.

[0081] For example, to determine the target beam, if the candidate beams that meet the preset execution conditions are {beam11, beam22, beam31, beam33}, in this example, the candidate cell and / or candidate beam that matches the current time is selected as the target cell or target beam. For instance, if the current time is within the preset associated time period of beam22, beam31, and beam33 respectively, then RACH-Less access is possible. In this case, the set of candidate beams includes the target beam {beam22, beam31, beam33}, meaning the UE can choose the target beam from beam22, beam31, and beam33. Alternatively, if only one candidate beam meets the conditions, then that beam is determined as the target beam.

[0082] In this embodiment, the method for determining the start time of the associated time period may include: using the start time at which the terminal device receives the configured start time, or using the start time at which the terminal device receives the preset execution conditions, or...

[0083] The start time is defined as the moment when the candidate target cell and / or candidate target beam indicated in the auxiliary information reported by the terminal device includes the target cell and / or target beam, i.e., the moment when the auxiliary information is reported is the start time, or...

[0084] The start time is determined based on the second signaling sent by the network side. The second signaling may include any signaling such as Radio Resource Control (RRC) signaling, Media Access Control Control Element (MAC CE) signaling, physical layer signaling, etc., and is not limited here.

[0085] In this example, the second signaling may include a preset association time period, etc. Any information in the second signaling may be configured at the beam level, i.e., different beams use different configuration information, or configured at the cell level, i.e., different beams within a cell use the same configuration information, while different cells use different configuration information, or configured at the beam group level, cell group level, signaling level, etc. The second signaling may include at least one of the following: duration, indication information for activating the preset association time period, offset time for the preset association time period to take effect, identification information of one or more candidate cells, identification information of one or more candidate beams, etc.

[0086] The aforementioned duration is the duration L for supporting RACH-Less. The offset time can be used to determine T1+n (where n represents the offset time) starting from the time T1 when the second signaling is received, corresponding to the candidate cell or candidate beam starting to support RACH-Less access. Both the duration and offset time can be configured at the candidate cell level, beam group level, cell group level, signaling level, cell level, or beam level, etc. Alternatively, T1 can be the start time. Optionally, the offset time n can be a network configuration parameter (provided through the second signaling or other signaling), a configuration parameter determined based on UE capabilities, or a configuration parameter specified by the protocol; there are no restrictions.

[0087] The eleventh example involves selecting, from multiple candidate cells and / or candidate beams that meet preset execution conditions, candidate cells and / or candidate beams that have completed Transmission Configuration Indication (TCI) activation and / or Channel State Information (CSI) measurement and / or CSI measurement reporting as target cells and / or target beams.

[0088] In this example, candidate cells or candidate beams that have completed TCI activation and / or CSI measurement reporting and / or CSI measurement can be preferentially selected as target cells and / or target beams.

[0089] For example, to determine the target beam, the candidate beams that meet the preset execution conditions are {beam11, beam22, beam31, beam33}. In this example, candidate cells and / or candidate beams that have completed TCI activation are selected as the target cell and / or target beam. For example, if the UE has completed TCI activation of beams beam22, beam31, and beam33, then the set of candidate beams includes the target beam {beam22, beam31, beam33}. Alternatively, in this example, candidate cells and / or candidate beams that have completed CSI measurement are selected as the target. The target cell and / or target beam, for example, if the UE has completed CSI measurements for beams 22, 31, and 33, then the set of candidate beams includes the target beam {beam22, beam31, beam33}. Alternatively, in this example, candidate cells and / or candidate beams that have completed CSI measurements and reporting are selected as the target cell and / or target beam. For example, if the UE has completed CSI measurements and reporting for beams 22, 31, and 33, then the set of candidate beams includes the target beam {beam22, beam31, beam33}. Furthermore, the UE can select the target beam from beam22 and beam31, beam33. Or, if only one candidate beam meets the criteria, it is directly determined as the target beam.

[0090] In this example, before the UE evaluates the candidate cells and / or candidate beams to meet preset execution conditions, the network side can trigger the TA acquisition or candidate cell TCI activation process. For example, during the network-triggered candidate cell TCI activation process, the activated candidate cells are TCI state ID1 and TCI state ID2 of cell 3, with beams 32 and 33 associated with them, respectively. One possible implementation is that beams 32 and 33 themselves are TCI states, i.e., the beams are represented by TCI states. Another possible implementation is that beams 32 and 33 are reference signals, i.e., the beams are represented by reference signals such as the SSB index. The associated beams beam32 and beam33 are the reference signals for the corresponding TCI states, or the reference signal for a specific QCL type (e.g., typeID) of the corresponding TCI state (e.g., TCI State ID 1) (e.g., beam32), or the reference signal for the associated TCI state ID (e.g., TCI state 3) of the corresponding TCI state (e.g., TCI State ID 1) (e.g., beam32), or the reference signal for the associated TCI state ID (e.g., TCI state 3) of the corresponding TCI state (e.g., TCI State ID 1) (e.g., typeID) (e.g., beam32). There are no specific restrictions.

[0091] The CSI measurement in this embodiment may include, but is not limited to, CQI, PMI, RI, RSRP, etc.

[0092] The twelfth example involves selecting, from a plurality of candidate cells and / or candidate beams that meet preset execution conditions, a candidate cell and / or candidate beam that indicates the execution of Channel State Indication (CSI) measurement and / or CSI measurement reporting as the target cell and / or target beam.

[0093] In this example, candidate cells and / or candidate beams that indicate the performance of Channel State Indication (CSI) measurement reporting can be preferentially selected as target cells and / or target beams.

[0094] For example, to determine the target beam, the candidate beams that meet the preset execution conditions are {beam11, beam22, beam31, beam33}. In this example, the candidate cell and / or candidate beam that indicates the execution of Channel State Indication (CSI) measurement and / or CSI measurement reporting is selected as the target cell and / or target beam. For example, the network instructs the UE to perform CSI measurement and reporting of beam31. The indication information can be included in the pre-configuration information or notified to the UE through separate signaling. There is no restriction here. The UE then selects beam31 as the target beam.

[0095] The following specific embodiments illustrate this: In one possible embodiment, taking the target cell as one cell and the target beam as one beam as an example, it is not excluded that the target beam is multiple beams, nor is it excluded that the target cell is multiple cells. For the case that the target cell is multiple cells, or the target beam is multiple beams, other cells or beams are selected according to the same principle, which will not be elaborated here.

[0096] The following describes the process of selecting the target beam in this embodiment, using a specific application scenario as an example:

[0097] Example 3-1: Determining the candidate beam / cell set. The specific configuration and process are the same as in the previous examples. Assume that the beams that meet the execution conditions are beam11, beam22, beam31, and beam33, or the candidate cells that meet the execution conditions are cell1 and cell2. Taking the selection of the target beam as an example, the UE determines a set of candidate beams from the beams that meet the execution conditions, and the UE selects a target beam from the set of candidate beams for access.

[0098] Referring to the above embodiments, the principles for selecting the target beam can be one or a combination of the following:

[0099] Principle 1: The candidate cell or candidate beam must meet the associated execution conditions;

[0100] Under this principle, all beams that meet the execution conditions are candidate beams. Taking this embodiment as an example, the set of candidate beams includes beams {beam11, beam22, beam31, beam33}.

[0101] Principle 2: Prioritize candidate target cells or candidate target beams included in the auxiliary information reported by the UE to the network side;

[0102] Under this principle, the UE will prioritize selecting candidate target cells or candidate target beams contained in the auxiliary information reported to the network side. For example, taking the aforementioned embodiment as an example, if the auxiliary information reported by the UE to the network side includes beam31 and beam22 as candidate target beams, indicating to the network side that beam31 and beam22 are candidate access beams, but beam11 and beam33 are not reported to the network side, then the set of candidate beams includes beams {beam22, beam31}.

[0103] Principle 3: Prioritize candidate cells that have completed candidate configuration information preprocessing or candidate beams on candidate cells that have completed candidate configuration information preprocessing;

[0104] Under this principle, for example, if the UE has completed the preprocessing of candidate configuration information for cell3 and cell2, but has not completed the preprocessing of candidate configuration information for cell1, then the set of candidate beams includes beams {beam22, beam31, beam33}.

[0105] Principle 4: Prioritize candidate cells or candidate beams that can perform RACH-less operations based on network indications;

[0106] Under this principle, for example, according to the above embodiment, if the network side indicates that beam22, beam31, and beam33 can perform RACH-Less access, then the set of candidate beams includes beams {beam22, beam31, beam33}.

[0107] Principle 5: Prioritize candidate cells or candidate beams that are currently located within a preset time period associated with the candidate cell or candidate beam;

[0108] Under this principle, for example, if the current time is within the preset time period associated with beam22, beam31, and beam33, RACH-Less access can be performed, and the set of candidate beams includes beams {beam22, beam31, beam33}.

[0109] Principle 6: Prioritize candidate cells or candidate beams that have completed TCI activation / or CSI measurement and / or CSI measurement reporting;

[0110] Under this principle, for example, if the UE has completed TCI activation and / or CSI measurement and / or CSI measurement reporting for beams 22, 31, and 33, then the set of candidate beams includes beams {beam22, beam31, beam33}.

[0111] In practical implementation, only one of the above principles can be executed to determine the set of candidate beams, or several principles can be combined. For example, beams selected when both principles 6 and 2 are satisfied are included in the set of candidate beams. When no beams satisfy multiple principles simultaneously, the beam that satisfies the most principles can be prioritized as the beam in the set of candidate beams. For example, when principles 2-6 are used simultaneously, among all beams that meet the execution conditions, no single beam satisfies all the above principles simultaneously, but beam31 satisfies the most principles, so the beam velocity included in the set of candidate beams is {beam31}. Alternatively, when multiple principles are used in combination, the candidate beam that satisfies the highest priority principle can be prioritized. If the beam that satisfies the highest priority principle does not exist, the second highest priority beam is further judged and selected as a candidate beam, and so on, until at least one candidate beam is selected.

[0112] When only one candidate beam satisfies the execution conditions, the set of candidate beams contains only one candidate beam that satisfies the execution conditions.

[0113] Alternatively, if only one candidate cell meets the execution conditions, then the set of candidate cells contains only one candidate cell that meets the execution conditions.

[0114] Example 3-2: Target cell selection. When only one candidate beam meets the execution conditions, the UE selects the cell containing the only candidate beam that meets the execution conditions as the target cell.

[0115] If only one candidate cell meets the execution conditions, the UE selects the only candidate cell that meets the execution conditions as the target cell.

[0116] The following examples illustrate this with specific scenarios:

[0117] Scenario 1: Assume the execution condition is an associated beam execution condition or a beam-level execution condition, meaning the UE determines whether the execution condition is met by evaluating the measurement results of one or more beams:

[0118] The specific configuration and process are the same as in the previous embodiment. It is assumed that the beams that meet the execution conditions are {beam11, beam22, beam31, beam33} or the set of candidate beams determined according to embodiment 3-1 contains the beams {beam11, beam22, beam31, beam33}. The UE determines a target cell for access from the above beam set.

[0119] Specifically, the UE can optionally execute the aforementioned embodiment 3-1.

[0120] When Example 3-1 is not executed, the UE selects the target cell from the beams or candidate cells that meet the execution conditions.

[0121] When Example 3-1 is executed, the UE selects the target beam from the beam set or candidate cell set determined in Example 3-1 above;

[0122] The principles for selecting the target cell can be one or a combination of the following:

[0123] Principle 1: Implementation selection based on UE;

[0124] Under this principle, based on the UE implementation, a target cell, such as cell3, can be selected from {beam11, beam22, beam31, beam33}.

[0125] Principle 2: The UE selects the candidate cell with the best current link quality;

[0126] Under this principle, link quality can be cell-level link quality, such as the result of RRM measurement, or L1 measurement result, i.e., beam-level measurement result (which can be time-filtered or unfiltered, without restriction). For example, if beam33 currently has the best link quality, or cell3 currently has the best link quality, then cell3 is selected as the target cell.

[0127] Principle 3: When the UE selects the candidate target cell with the best link quality to report auxiliary information;

[0128] Under this principle, link quality can be cell-level link quality, such as the result of RRM measurement, or L1 measurement result, i.e., beam-level measurement result (which can be time-filtered or unfiltered, without restriction). For example, beam33 currently has the best link quality, or cell3 currently has the best link quality. However, when the UE reports auxiliary information to the network (see the aforementioned embodiment), if beam22 has the best link quality or cell2 has the best link quality, then cell2 is selected as the target cell.

[0129] Principle 4: Pre-configure uplink resources for the first candidate cell to arrive;

[0130] Under this principle, uplink resources are associated with candidate beams that meet the conditions. For example, if the uplink resources of beam33 arrive first, even if the uplink resources of beam21 arrive earlier, the target cell is selected because beam21 does not meet the execution conditions. That is, the target cell is cell3.

[0131] Principle 5: Candidate cells for which candidate configuration information preprocessing has been completed;

[0132] Under this principle, for example, if the UE has completed the preprocessing of candidate configuration information for cell3 and cell2, but has not completed the preprocessing of candidate configuration information for cell1, then the target cell selected is cell2 or cell3.

[0133] Principle 6: Include candidate cells that contain the most beams that meet the execution conditions;

[0134] Under this principle, based on this embodiment, it can be seen that only one beam in cell1 and cell2 meets the execution conditions, while two beams in cell3 meet the execution conditions. Therefore, the target cell selected is cell3.

[0135] Principle 7: The cell with the most candidate target beams in the reported auxiliary information is the target cell;

[0136] Under this principle, the UE will prioritize the cell with the most candidate target beams in the auxiliary information reported to the network side. For example, taking the aforementioned embodiment as an example, the auxiliary information reported by the UE to the network side in step three includes beam21, beam31 and beam22, indicating to the network side that beam21, beam31 and beam22 are candidate access beams. It can be seen that cell2 contains more beams than cell3. Therefore, both cell2 and cell3 have beams that meet the execution conditions. Even if cell3 has more beams that meet the execution conditions, cell2 reports more beams when reporting to the network side, so cell2 is selected as the target cell.

[0137] Principle 8: Candidate cells that can perform RACH-less operations or candidate cells that can perform RACH-less candidate beams;

[0138] Under this principle, to determine whether a candidate cell can perform RACH-less access, refer to Example 2. For example, if beam33 can perform RACH-less access, then cell3 is selected as the target cell.

[0139] Principle 9: Prioritize candidate cells or candidate beams that have completed TCI activation / or CSI measurement and / or CSI measurement reporting;

[0140] Under this principle, for example, if the UE has completed TCI activation and / or CSI measurement and / or CSI measurement reporting for beam31 and beam33, then the target cell selected is cell3.

[0141] In the specific implementation process, only one of the above principles can be executed to determine the target cell, or several principles can be used in combination. For example, principles 6 and 8 can be satisfied simultaneously to select the target cell. When there is no beam that satisfies multiple principles simultaneously, the cell that satisfies the most principles can be selected as the target cell. For example, if principles 2-6 are used simultaneously, among all beams that meet the execution conditions, no cell satisfies all of the above principles at the same time, but beam31 satisfies the most principles, then the target cell is the cell where beam31 is located, i.e., cell3. Alternatively, when multiple principles are used in combination, the cell that satisfies the principle with the highest priority can be selected first. When there is more than one cell that satisfies the highest priority, the second highest priority is further judged to select the target cell, until a unique or sufficient number of target cells are selected. For example, if principle 8 has the highest priority, and cells 1, 2, and 3 all satisfy principle 8, the second highest priority is principle 9, and cells 1 and 3 satisfy principle 9, then the third highest priority is further judged, such as principle 1, and one of the cells is selected as the target cell based on principle 1. If no cell meets the execution conditions under the first priority principle, the second priority principle can be further evaluated, and so on, until a unique or sufficient number of target cells are selected.

[0142] Scenario 2: Assume the execution condition is the execution condition of the associated cell, or the execution condition at the cell level, that is, the UE determines whether the execution condition is met by evaluating the measurement results of a cell:

[0143] The specific configuration and process are the same as in the previous embodiments. It is assumed that the candidate cells that meet the execution conditions are {cell1, cell2}, or the set of candidate cells determined according to embodiment 3-1 contains cells {cell1, cell2}. The UE selects a target cell from the above cell set for access.

[0144] Specifically, the UE can choose to execute Example 3-1.

[0145] If Example 3-1 is not executed, the UE can select the target cell from the beams or candidate cells that meet the execution conditions.

[0146] When Example 3-1 is executed, the UE selects the target cell from the beam set or candidate cell set determined in Example 3-1;

[0147] The principles for selecting the target cell can be one or a combination of the following:

[0148] Principle 1: Implementation selection based on UE;

[0149] Under this principle, the UE implements the selection of a target cell, such as cell3, from {cell1, cell2}.

[0150] Principle 2: The UE selects the candidate cell with the best current link quality;

[0151] Under this principle, link quality can be cell-level link quality, such as the result of RRM measurement, or L1 measurement result, i.e., beam-level measurement result (which can be time-filtered or unfiltered, without restriction). For example, if beam33 currently has the best link quality, or cell3 currently has the best link quality, then cell3 is selected as the target cell.

[0152] Principle 3: When the UE selects the candidate target cell with the best link quality to report auxiliary information;

[0153] Under this principle, link quality can be cell-level link quality, such as the result of RRM measurement, or L1 measurement result, i.e., beam-level measurement result (which can be time-filtered or unfiltered, without restriction). For example, beam33 currently has the best link quality, or cell3 currently has the best link quality. However, when the UE reports auxiliary information to the network (see the aforementioned embodiment), if beam22 has the best link quality or cell2 has the best link quality, then cell2 is selected as the target cell.

[0154] Principle 4: Pre-configure uplink resources for the first candidate cell to arrive;

[0155] Under this principle, one implementation is to associate uplink resources with beam-associated uplink resources that meet certain configuration conditions (e.g., link quality greater than a pre-configured threshold). For example, if the uplink resource of beam33 arrives first, even if the uplink resource of beam21 arrives earlier, beam21 does not meet the configuration conditions. Since the configuration conditions here are different from the execution conditions for determining cell changes, the cell where beam33 is located is selected as the target cell, i.e., cell3 is the target cell. Another implementation is to not determine the beam-level conditions, and then the uplink resource is the uplink resource of the cell. For example, if the uplink resource of cell2 arrives first, then cell2 is the target cell, or the cell with the shorter uplink resource period is selected as the candidate cell.

[0156] Principle 5: Candidate cells for which candidate configuration information preprocessing has been completed;

[0157] Under this principle, for example, if the UE has completed the preprocessing of candidate configuration information for cell3 but has not completed the preprocessing of candidate configuration information for cell2, then the target cell is cell3.

[0158] Principle 6: Include candidate cells that meet the configuration conditions for the most beams;

[0159] Under this principle, for example, if two beams in cell3 meet the configuration conditions (e.g., the link quality is greater than the pre-configured threshold), but only one beam in cell2 meets the configuration conditions, then cell3 is selected as the target cell.

[0160] Principle 7: The cell with the most candidate target beams in the reported auxiliary information is the target cell;

[0161] Under this principle, the UE will prioritize selecting the cell with the most candidate target beams in the auxiliary information reported to the network side. For example, taking the aforementioned embodiment as an example, the auxiliary information reported by the UE to the network side in the above steps includes beam21, beam31, and beam22, indicating to the network side that beam21, beam31, and beam22 are candidate access beams. It can be seen that cell2 contains more beams than cell3, so cell2 is selected as the target cell.

[0162] Principle 8: Candidate cells that can perform RACH-less operations or candidate cells that can perform RACH-less candidate beams;

[0163] Under this principle, to determine whether a candidate cell can perform RACH-less access, refer to Example 2. For example, if cell 3 can perform RACH-less access, then cell 3 is selected as the target cell.

[0164] Principle 9: Prioritize candidate cells or candidate beams that have completed TCI activation / or CSI measurement and / or CSI measurement reporting;

[0165] Under this principle, for example, if the UE has completed TCI activation and / or CSI measurement and / or CSI measurement reporting for beam cell 3, then the target cell selected is cell 3.

[0166] In practical implementation, only one of the above principles can be executed to determine the target cell, or several principles can be combined. For example, principles 6 and 8 can be satisfied simultaneously to select the target cell. When no beam satisfies multiple principles simultaneously, the cell satisfying the most principles can be prioritized as the target cell. For example, if principles 2-6 are used simultaneously, among all beams that meet the execution conditions, no single cell satisfies all the above principles, but cell 3 satisfies the most principles, then cell 3 is the target cell. Alternatively, when multiple principles are used in combination, the cell satisfying the highest priority principle can be prioritized. When more than one cell satisfies the highest priority principle, the second highest priority principle is further evaluated to select the target cell, until a unique or sufficient number of target cells are selected. For example, if principle 8 has the highest priority, and cells 1, 2, and 3 all satisfy principle 8, the second highest priority principle is principle 9, and cells 1 and 3 satisfy principle 9. Then, the third highest priority principle is evaluated, such as principle 1, and one cell is selected as the target cell based on principle 1. When no cell satisfies the execution conditions under the first priority principle, the second priority principle can be evaluated, and so on, until a unique or sufficient number of target cells are selected.

[0167] Example 3-3: Target beam selection is performed, with the specific configuration and process the same as in the previous examples. Assume the beams meeting the execution conditions are {beam11, beam22, beam31, beam33}, or the set of candidate beams determined according to Example 3-1 contains {beam11, beam22, beam31, beam33}, or a target cell, such as cell3, has been determined according to Example 3-2, and cell3 contains beams {beam31, beam33} that meet the execution conditions. The UE selects a target beam from the above beam set for access. Without executing Example 3-2, if the UE selects a target beam, the cell containing the target beam is the target cell. Specifically, the UE can optionally execute Example 3-2 or Example 3-1.

[0168] If Example 3-1 is not executed, the UE can select the target beam from the beams that meet the execution conditions.

[0169] When Example 3-1 is executed, but Example 3-2 is not executed, the UE selects the target beam from the beam set determined in Example 3-1;

[0170] When Example 3-2 is executed, the UE selects the target beam from the beam associated with the target cell determined in Example 3-2, or from the beams of the target cell that meet the execution conditions.

[0171] The principles for selecting the target beam can be one or a combination of the following:

[0172] Principle 1: Implementation selection based on UE;

[0173] Under this principle, a target beam, such as cell31, can be selected from {beam11, beam22, beam31, beam33} based on the UE implementation.

[0174] Principle 2: The UE selects the candidate beam with the best current link quality;

[0175] Under this principle, the link quality can be the L1 measurement result, i.e., the beam-level measurement result (which can be time-filtered or unfiltered, without restriction). For example, if beam33 currently has the best link quality, then beam33 is selected as the target beam.

[0176] Principle 3: When the UE selects to report auxiliary information, it should choose the candidate target beam with the best link quality.

[0177] Under this principle, the link quality can be the L1 measurement result, i.e., the beam-level measurement result (which can be time-filtered or unfiltered, without restriction). For example, beam33 currently has the best link quality, but when the UE reports auxiliary information to the network (see the aforementioned embodiment), beam31 has the best link quality, then beam31 is selected as the target beam.

[0178] Principle 4: Pre-configure the candidate beam that arrives first for uplink resources;

[0179] Under this principle, uplink resources are associated with candidate beams that meet the conditions. For example, if the uplink resource of beam33 arrives first, even if the uplink resource of beam21 arrives earlier, beam33 is selected as the target beam because beam21 does not meet the execution conditions.

[0180] Principle 5: Candidate beams for RACH-less candidate cells or candidate beams for RACH-less cells can be executed;

[0181] Under this principle, to determine whether a candidate cell or candidate beam can perform RACH-less access, refer to Example 3-2. For example, if beam33 can perform RACH-less access, then the target cell is cell3.

[0182] Principle 6: Prioritize candidate cells or candidate beams that have completed TCI activation / or CSI measurement and / or CSI measurement reporting;

[0183] Under this principle, for example, if the UE has completed TCI activation and / or CSI measurement and / or CSI measurement reporting for beam33, then the target beam selected is beam33.

[0184] In practical implementation, any one of the above principles can be executed to determine the target beam, or several principles can be combined. For example, if both principles 6 and 5 are satisfied, the target beam can be selected. When no beam satisfies multiple principles simultaneously, the candidate beam that satisfies the most principles can be selected as the target beam. For example, if principles 2-6 are used simultaneously, among all beams that meet the execution conditions, no single beam satisfies all of the above principles, but beam31 satisfies the most principles, then beam31 is the target beam. Alternatively, when multiple principles are used in combination, the beam that satisfies the highest priority principle can be selected first. When there is more than one beam that satisfies the highest priority principle, the second highest priority beam is further judged to select the target beam, until a unique target beam or a target beam that meets the required number is selected. For example, if principle 5 has the highest priority, beam21, beam31, and beam33 all satisfy principle 5. If principle 6 is the second highest priority, beam21 and beam31 satisfy principle 6, then the third highest priority beam is further judged, such as principle 1. Based on principle 1, one of the beams is selected as the target beam. If no beam meets the execution conditions under the first priority principle, the second priority principle can be further judged, and so on, until a unique target beam or a target beam that meets the required quantity is selected.

[0185] When only one candidate beam meets the execution conditions, the UE selects the only candidate beam that meets the execution conditions as the target beam.

[0186] Alternatively, if only one candidate cell meets the execution conditions, the UE selects the beam from the only candidate cell that meets the execution conditions as the target beam.

[0187] Step 102: If it is determined that the target cell and / or target beam meet the preset access conditions, then trigger access to the target cell and / or target beam in a RACH-less manner.

[0188] Among them, at least one preset access condition must be met to determine whether access is via RACH-less mode.

[0189] In this embodiment, if the target cell and / or target beam meet the preset access conditions, access to the target cell and / or target beam in a RACH-less manner is triggered; otherwise, access to the target cell and / or target beam in a RACH-random manner is triggered. Thus, the terminal device can determine whether to trigger RACH-less access to the target cell and / or target beam.

[0190] It should be noted that the preset access conditions differ in different application scenarios, and therefore, the methods for determining whether the target cell and / or target beam meet the preset access conditions vary. In specific execution, at least one of the following examples can be used to determine whether the target cell and / or target beam meet the preset access conditions, as shown below:

[0191] The first example determines that the terminal device has acquired the effective Time Advanced (TA) value for the target cell and / or target beam.

[0192] In this embodiment, if the TA value of the target cell and / or the target beam is obtained in advance, it indicates that the terminal device has the basis to access the target cell and / or the target beam, thereby determining that the target cell and / or the target beam meet the corresponding preset access conditions.

[0193] In this example, before the UE performs a cell change, it can be triggered to send a preamble in a specified candidate cell to obtain the TA value of the corresponding candidate cell. Alternatively, the source cell can send the corresponding TA value to the UE when sending indication information. In addition, a UE-based TA acquisition process is also supported, where the UE can obtain the TA value of the candidate cell through UE measurement based on network configuration. A valid TA value means that the TA value is valid in the target cell and / or target beam of the application.

[0194] The second example determines that the terminal device has acquired the uplink pre-configured resources associated with the target cell and / or the target beam.

[0195] If the uplink pre-configured resources associated with the target cell and / or target beam are obtained, it indicates that the target cell and / or target beam can be accessed in a RACH-less manner. The uplink pre-configured resources may include relevant uplink resources for cell access.

[0196] The third example is determining the Transmission Configuration Indicator (TCI) state for when the terminal device activates the target cell and / or target beam.

[0197] In this example, if the terminal device activates the Transmission Configuration Indicator (TCI) state for the target cell and / or target beam, the activation of the TCI state can be based on network signaling or on preset conditions. When the conditions are met, the UE activates the relevant TCI state. Optional preset conditions include network configuration. Optionally, the UE sends indication information to the network side to notify the network side of the activation of the relevant TCI state. This method allows the network side to obtain the UE's activated TCI state information, i.e., predict the beam information that the UE can access, thereby determining that the target cell and / or target beam meet the corresponding preset access conditions. The above example uses TCI state but is not limited to other configuration information that can represent spatial division relationships.

[0198] The fourth example is determining that the candidate target cell or candidate target beam indicated in the auxiliary information reported by the terminal device to the network side contains the target cell and / or target beam.

[0199] In this example, the auxiliary information may include candidate target cells or candidate target beams, which include the selected target cell and / or target beam. Therefore, in this implementation, it is determined that the candidate target cell or candidate target beam indicated in the auxiliary information reported by the terminal device to the network side contains the target cell and / or target beam. The specific content of the auxiliary information can be found in the foregoing description. Optionally, if the network is not configured to report auxiliary information, or if it is configured to report auxiliary information but the reported candidate target cells or candidate target beams do not include the selected target cell or target beam, then RACH access is performed.

[0200] The fifth example is determining that the auxiliary information reported by the terminal device to the network side includes the Activation Transmission Configuration Indication (TCI) for the target cell and / or target beam.

[0201] In this example, the auxiliary information reported by the terminal device to the network side includes the Activation Transmission Configuration Indicator (TCI) for the target cell and / or target beam. Therefore, it can be assumed that the target cell and / or target beam will prepare the access resources for the terminal device in advance and determine that the target cell and / or target beam meet the preset access conditions.

[0202] The sixth example determines that the network side instructs the terminal device to access the target cell or target beam in a RACH-less manner.

[0203] In this example, the network side can receive the relevant content of RACH-less access configured in the pre-configuration message to determine whether the target cell and / or target beam can be accessed via RACH-less. That is, the network side indicates in the pre-configuration information whether the terminal device can access the target cell or target beam in a RACH-less manner.

[0204] For example, if the target beam is beam31, the UE determines whether the pre-configuration information of the target cell cell3 corresponding to beam31 contains an indication of whether RACH-LESS is allowed. This indication can be configured at the cell level or at the beam level, etc. The specific implementation can determine whether RACH-LESS access can be performed in the target cell and / or the target beam by using different values ​​or by configuring this indication.

[0205] Alternatively, in this example, the receiving network side may indicate whether RACH-less access can be performed by the candidate cell and / or candidate beam via a first signaling message. The first signaling message may be a MAC CE, or Downlink Control Information (DCI), or RRC signaling, etc. The first signaling message may include at least one of the following: indication information indicating whether RACH-less access can be performed by the candidate cell or candidate beam; identification information of one or more candidate cells; and identification information of one or more candidate beams.

[0206] The configuration information in the first signaling can be configured according to the signaling level (i.e., all beams or cells included in the first signaling are subject to the configuration information of the first signaling), according to the cell level (i.e., the configuration information of the first signaling is applied to the associated cells), according to the beam level (i.e., the configuration information of the first signaling is applied to the relevant beams), according to the cell group level (i.e., the configuration information of the first signaling is applied to all cells in the associated cell group), or according to the beam group level (i.e., the configuration information of the first signaling is applied to the associated beam group, the beam group contains at least one or more beams, the beams can be identified by TCI state ID, reference signal, etc., and the beams in the same beam group can be beams from different cells or beams from the same cell).

[0207] In this implementation, if the network side instructs the terminal device to access the target cell or target beam in a RACH-less manner, it indicates that the target cell and / or target beam meet the corresponding preset access conditions.

[0208] The seventh example, combined with the sixth example, involves determining whether to activate the RACH-less function of the associated candidate cell or candidate beam according to predefined default rules if the first signaling message does not contain RACH-less indication information. For example, taking a beam as an example, one possible default rule is: if the first signaling message carries beam11, then beam11 is considered to support RACH-less; if the first signaling message carries beam11 a second time, then beam11 is considered not to support RACH-less; and if it appears a third time, then beam11 is considered to support RACH-less. The reverse is also true.

[0209] The eighth example determines that the time when the terminal device performs access to the target cell and / or target beam is within a preset associated time period of the target cell and / or target beam.

[0210] In this example, the target cell and / or target beam have a preset association time period, including: a non-periodic preset association time period configured by the network side, wherein the preset association time period can determine the start time and duration. This preset association time period can be set at the cell level, the beam level, or the terminal device level, etc., without limitation, as described above. Alternatively, the preset association time period can include a periodically occurring preset association time period configured by the network side, wherein the preset association time period can determine the period, the start time within the period, and the duration, etc. For example, the network side configures the period, offset time, and duration to obtain a periodically occurring window. If the current time falls within the periodically occurring window time of the candidate cell and / or candidate beam, it can be determined as the target cell or target beam. See the foregoing.

[0211] In this embodiment, the start time of the preset associated time period can be referred to the foregoing.

[0212] For example, before the UE evaluates whether a candidate cell or candidate beam meets preset execution conditions, the UE triggers auxiliary information reporting to the network side. For instance, at time T1, the UE reports auxiliary information containing beams beam21 and beam33. The start time is, for example, the moment when the candidate target cell and / or candidate target beam indicated in the auxiliary information reported by the terminal device contains the target cell and / or target beam, i.e., time T1 is the start time, and the duration is L. Assuming the target beam is beam33, and the execution conditions are met at time T3, if T3 is between [T1, T1+L], then the time when the terminal device executes access to the target cell is determined to be within the preset associated time period of the target beam, and RACH-less can be executed. One possible approach is for the network to determine, based on big data or AI conditions, that the probability of the UE entering the associated beam or cell within the preset associated time period is extremely high, and therefore allocates RACH-less access resources to the UE during that time period.

[0213] In this example, the target beam is associated with a preset associated time period, denoted by timer1. Timer1 has a start time of T1, a duration of L1, and a timeout time of T2, where T2 = timer1 + L1. The configuration of timer1 can include, for example, L1 and / or T1, and / or T2. In one implementation, the configuration information of this preset associated time period can be indicated by the network side in the second signaling as described above, or provided by other signaling or pre-configured information. The configuration of timer1 can be at the cell level, at the UE level, or at the beam level, as described above. Referring to the above embodiment, the start time of timer1 can be determined in any of the following ways:

[0214] The start time is taken as the time when the terminal device receives the configuration, or...

[0215] The start time is defined as the moment when the terminal device receives the preset execution conditions, or...

[0216] The start time is defined as the moment when the candidate target cell or candidate target beam indicated in the auxiliary information reported by the terminal device contains the target cell or target beam, or...

[0217] The start time is determined based on the second signaling sent from the network side.

[0218] The details are as described above and will not be repeated here.

[0219] Taking beam31 as the target beam as an example, if the current time is T3, and T3 is within the preset associated time period [T1, T2], then RACH-less access is executed; otherwise, RACH access is executed.

[0220] In this embodiment of the present disclosure, the preset associated time period can be determined by a timer or by other calculation methods.

[0221] The ninth example is determining whether the target cell and / or target beam support dynamic scheduling access.

[0222] In this example, the UE determines that the target cell and / or target beam supports dynamic scheduling access. This can be achieved by notifying the UE through configuration indications. Specific configurations can include relevant indication information in the pre-configuration information of candidate cells or candidate beams, or through separate signaling. The signaling format can be RRC, MAC CE, DCI, etc., without limitation, and the signaling granularity can be cell-level, beam-level, cell group-level, beam group-level, etc., without limitation. The UE can determine that the target beam or target cell supports dynamic scheduling, or allow the UE to access via dynamic scheduling, based on the indication information. The UE can listen to the scheduling information of the target cell or target beam when determining access to the target cell or target beam. Optionally, under this scheme, even if the terminal does not obtain pre-configured uplink resources, it can still access the target cell through dynamic scheduling.

[0223] The tenth example determines that the terminal is within a specified location area.

[0224] In this example, the UE determines that it meets a specified location area range. The specific location area range configuration can be through pre-configured information of candidate cells or candidate beams containing relevant indication information, or through separate signaling. The signaling format can be RRC, MAC CE, DCI, etc., without restriction. The signaling granularity can be cell-level, beam-level, cell group-level, beam group-level, etc., without restriction. The UE determines whether it is within the specified area range or meets a certain location condition based on its own location information. The network provides RACH-less access within this location range. For example, if the network configures a location area range S1, one possible implementation is that there are few user terminals within S1, base station resources are sufficient, or the network determines based on big data or other conditions that the probability of the UE entering S1 is high, so RACH-less access resources are allocated. Optionally, when the UE meets the requirements of this area range, it can report auxiliary information to the network side. This auxiliary information can include the UE's geographic location information and / or beam information, etc. The location area range can be a spatial range, a distance range, an altitude range, or an indication of the corresponding spatial range via an indication beam.

[0225] The eleventh example determines that the terminal performed and / or was instructed to perform CSI measurements and / or report for the target beam or target cell.

[0226] In this example, the terminal determines that it has performed and / or been instructed to perform CSI measurements and / or reporting for the target beam or target cell. For example, if the target beam is beam33, the terminal completes the CSI measurement for beam33. This measurement can be performed by the terminal based on network instructions or by the UE. Alternatively, the UE may be instructed by the network to perform and report beam33 measurements. The specific measurement can be performed before or after determining access to beam33, and the reporting is not limited to either the source cell or the target cell. The instruction information can be included in pre-configuration information or notified to the UE via separate signaling; this is not limited here. Therefore, RACH-less access can be performed on beam33.

[0227] The twelfth example determines that the terminal has the specified service.

[0228] In this example, the terminal determines that a specified service exists and whether RACH-less access can be triggered. For example, the specified service could be indicated to the UE via bearer configuration, allowing RACH-less access, or it could be notified to the UE via indication information associated with the PDU-session that the service in that PDU-session can be accessed RACH-less. Alternatively, it could be associated with QoS; this is not limited here. One possible implementation, taking the bearer as an example, is that the UE has RB1 and RB2, where RB2 is configured with indication information allowing RACH-less access. When the UE determines to perform a cell change, RB2 is active, for example, if there is a service being transmitted and / or a service to be transmitted, then RACH-less access to the target cell can be performed. If RB2 is suspended or deactivated, for example, if there is no service being transmitted and / or a service to be transmitted, and RB1 is active, for example, if there is a service being transmitted and / or a service to be transmitted, then the UE cannot trigger RACH-LESS access.

[0229] Specifically, if the UE meets at least one of the above criteria, it can be determined to access the RACH-less mode. For example, it can meet only one of the criteria, such as the first example, or meet the first, second, and third examples simultaneously, or meet the eleventh example, the first example, and the third example simultaneously. The specific combination of examples is not limited here. The above examples can also be combined to determine whether RACH-less access can be performed based on priority. For example, the priority of the beam that activates the TCI is higher than the priority of the beam that is only included in the auxiliary information. If the UE reports auxiliary information, such as beam31, beam32, beam21, and beam12, but meets the execution conditions before receiving the network side's command to activate the TCI, that is, before the UE selects the target beam, it has not received the command from the network side to activate the TCI of the target cell, and the target beam selected by the UE is the beam that reported the auxiliary information, such as beam31, then the UE can perform RACH-less access. However, if the UE receives the command to activate the TCI before meeting the execution conditions, and the TCI of the candidate cell included in the activation command contains the target beam, such as the TCI indicating activation of beam31, and the UE selects beam31, then RACH-less access can be performed. If beam31 is not indicated to be activated, then even if beam31 is included in the auxiliary information, RACH-less access cannot be performed if the target beam is beam31. It should be noted that the foregoing embodiments all mention that the terminal device will report auxiliary information to the network side. The content of the reported auxiliary information may vary depending on the scenario, and the auxiliary information may include at least one of the following examples:

[0230] In some possible examples, the content of the auxiliary information includes: identification information of at least one or more candidate cells and / or candidate beams, wherein the identification information can be used to uniquely identify the candidate cell or candidate beam, for example, beam11, beam22, etc. One possible implementation is that the beam is represented in the form of a reference signal identifier such as SSB index, CSI-RS index, etc.

[0231] In some possible examples, the content of the auxiliary information includes: one or more TCI information of at least one or more candidate cells and / or candidate beams that have been activated or may be activated. For example, the content of the auxiliary information is TCI11, where TCI11 is the TCI state of candidate cell cell1. One possible implementation scenario is that the UE determines to activate a certain TCI state of a certain candidate cell based on preset conditions and reports it to the network through auxiliary information, where the preset conditions can be preset conditions configured by the network.

[0232] In some possible examples, the content of the auxiliary information includes: information indicating whether one or more candidate cells and / or candidate beams are candidate target cells or candidate target beams. That is, the indication information can notify the network side that the UE may perform at least one of the following items in the candidate cell or candidate beam: access, activate TCI, obtain TA value, RACH-less access, CSI measurement, do not perform access, deactivate TCI, do not perform RACH-less access, do not perform CSI measurement; and / or, request the network to perform at least one of the following in the candidate cell or candidate beam: support RACH-less access, activate TCI, obtain TA, CSI measurement, do not support RACH-less access, do not activate TCI, do not obtain TA, do not perform CSI measurement. The aforementioned indication information can be configured according to the signaling level; for example, one auxiliary information item carries one indication information item, applied to all candidate cells or candidate beams carried in the auxiliary information. Alternatively, the information indicated above can be configured at the beam level, cell level, beam group level, or cell group level, meaning the indicated information can be applied to an associated beam, cell, beam group, or cell group.

[0233] When the information indicated by the indication is a candidate target cell or candidate target beam (e.g., notifying the network side that the UE may perform at least one of the following items in the candidate cell or candidate beam: access, activate TCI, obtain TA value, RACH-less access, CSI measurement; and / or requesting the network to perform at least one of the following in the candidate cell or candidate beam: support RACH-less access, activate TCI, obtain TA, CSI measurement), the network side may consider notifying the UE to activate TCI, or obtain TA, or support RACH-LESS access, or consider the beam or cell as a potential cell or beam for UE access based on the configuration information. When the information in the indication indicates that the associated cell or beam is no longer a candidate target cell or beam (e.g., notifying the network that the UE may perform at least one of the following items in the candidate cell or beam: no access, no activation of TCI, no acquisition of TA value, no RACH-less access, no CSI measurement; and / or requesting the network to perform at least one of the following in the candidate cell or beam: no support for RACH-less access, no activation of TCI, no acquisition of TA, no CSI measurement), the network may consider, based on the configuration information, notifying the UE to deactivate TCI or not activate TCI in the beam or cell, or not trigger TA acquisition, or not need to support RACH-LESS access, or consider the beam or cell not to be a potential cell or beam for the UE to access, etc.

[0234] In this example, if auxiliary information is reported multiple times, and the information indicating whether one or more candidate cells and / or candidate beams are candidate target cells or candidate target beams differs across reports, the most recently reported auxiliary information shall prevail. Alternatively, all reported auxiliary information may be used. For example, if the first reported auxiliary information includes candidate target beams beam11 and beam22, and the most recently reported auxiliary information includes candidate target beams beam23 and beam33, then the network considers beam23 and beam33 to be candidate target beams. Alternatively, it can be determined based on all reported auxiliary information. For instance, if the first reported auxiliary information includes candidate target beams beam11 and beam22, and the most recently reported auxiliary information includes candidate target beams beam23 and beam33, then the network considers beam11, beam22, beam23, and beam33 to be candidate target beams.

[0235] In some possible examples, the auxiliary information includes: one or more channel quality-related measurements for at least one or more candidate cells and / or candidate beams. These channel quality-related test results include, but are not limited to, Channel Quality Indicator (CQI), Signal-to-Interference plus Noise Ratio (SINR), and Reference Signal Receiving Power (RSRP). Furthermore, there is no restriction on whether the measurement results have been filtered, nor is there a restriction on whether the measurement results are cell-level or beam-level measurements.

[0236] In one embodiment of this disclosure, the reporting trigger time for auxiliary information reported by the terminal device to the network side may include: reporting auxiliary information to the network side before the terminal device performs target cell and / or target beam access; or,

[0237] Before the terminal device determines the target cell and / or target beam, it reports auxiliary information to the network side; or...

[0238] According to the period configured on the network side, auxiliary information is periodically reported to the network side, where the duration of the period can be configured on the network side; or,

[0239] The UE reports auxiliary information to the network side based on preset reporting trigger conditions. These reporting trigger conditions include: triggering an event that triggers a measurement report, triggering a request to obtain a TA, triggering TCI activation, triggering a request to measure CSI, triggering when the terminal device activates TCI, triggering when the terminal device obtains a TA value, or configured execution conditions before the UE performs cell change or beam change, or based on a network request, i.e., the UE receives a request message sent by the network and the UE triggers auxiliary information reporting, etc.

[0240] The cell access processing procedure of this disclosure is illustrated below with reference to a specific embodiment. In this example, UE represents the terminal device:

[0241] The UE's current serving cell is Cell0. The network sends signaling to configure the candidate cells cell1, cell2, and cell3 for the UE. This configuration information, taking cell1 as an example, includes, but is not limited to, the configuration information of cell1 itself. For example, it can include the configuration information of the cell group where cell1 is a Special Cell (SpCell). Candidate cells cell1 and cell2 can be candidate primary cells (PCell), primary secondary cells (PSCell), SpCells, or secondary cells (SCells). The serving cell cell0 can be a PCell, PSCell, SpCell, or any serving cell. Furthermore, it includes the execution conditions configured by the network for candidate cells cell1, cell2, and cell3. One application scenario is that the execution conditions are used by the UE to evaluate and determine whether to perform a cell change, such as handover or PSCell change. Additionally, the network can optionally provide the UE with other configuration information for cell1, cell2, and cell3 for measurement, early synchronization, TCI activation, etc. One possible application scenario is that the pre-configured information is candidate configuration information for LTM (Low-Time Mobility) triggered by L2 signaling, and the execution conditions are the execution conditions for conditional LTM. Cell1 contains candidate beams such as Beam11 and Beam12, cell2 contains candidate beams such as Beam21 and Beam22, and cell3 contains candidate beams Beam31, Beam32, and Beam33. The beams are associated through SSB, CSI-RS, or other reference signals, or through configurations that can associate spatial relationships such as TCI state ID; this is not limited here.

[0242] After the UE obtains the preset execution conditions and candidate cells and / or candidate beams configured by the network side, it evaluates whether the candidate cells or candidate beams meet the execution conditions. The UE can determine the candidate cells and / or candidate beams that meet the preset execution conditions. Before the UE determines that a candidate cell or candidate beam meets the preset execution conditions, the UE may optionally trigger auxiliary information reporting to the network side. For example, the reported auxiliary information may include indications that beam12, beam22, beam31, and beam32 are candidate target beams. In some possible embodiments, before the UE evaluates whether a candidate cell or candidate beam meets the preset execution conditions, the network side may trigger TA acquisition and / or candidate cell TCI activation procedures. The order of triggering TA acquisition and / or triggering candidate cell TCI activation procedures and the UE reporting auxiliary information is not limited.

[0243] Optionally, before the UE determines that a candidate cell or candidate beam meets the preset execution conditions, the network side sends a first signaling instruction to indicate that the UE can execute a RACH-Less candidate cell or candidate beam (e.g., beam31, beam22, or cell3), or cannot execute a RACH-LESS candidate cell or candidate beam (e.g., beam22 or cell3).

[0244] When at least one candidate cell (e.g., cell2) or at least one candidate beam (e.g., beam31, beam12) meets the preset execution conditions, the UE determines the target cell or target beam, such as beam31. The UE then determines whether RACH-less access can be performed on the target beam. If it can, the RACH-less access procedure is triggered; otherwise, the RACH access procedure is triggered.

[0245] The UE uses the pre-configured information of the target cell. Taking beam31 as an example, it uses the pre-configured information of cell3 or beam31 to access the target cell. If it accesses the target cell in beam31, it can listen to the PDCCH scheduling in the target beam, obtain uplink resources to send the first uplink data packet, or send the first uplink data packet in the pre-configured uplink resources associated with the target beam, and listen to the PDCCH to complete the RACH-less access process. If it accesses the target cell in RACH mode, it initiates the RACH process in the target beam.

[0246] In summary, the cell access processing method of this disclosure determines the target cell and / or target beam from candidate cells and / or candidate beams that meet preset execution conditions. If the target cell and / or target beam meets the preset access conditions, it triggers access to the target cell and / or target beam in a RACH-less manner. This technical solution enables the terminal device to decide whether to access the target cell and / or target beam in a RACH-less manner, reducing the implementation complexity on the network side during cell access processing.

[0247] The following description focuses on the cell access processing method of the present disclosure from the perspective of the first base station.

[0248] Wherein, the first base station may be the base station corresponding to the current serving cell of the terminal device. Figure 2 is a flowchart of a cell access processing method according to another embodiment of the present disclosure. As shown in Figure 2, the method includes the following steps 201 and 202. Steps 201 and 202 may be executed selectively or both may be executed. That is, steps 201 and 202 are executed in an AND / OR relationship, and steps 201 and 202 are not necessarily executed in sequence.

[0249] Step 201: Send indication information to the second base station, wherein the indication information is used to indicate at least one candidate cell and / or candidate beam of the second base station terminal equipment.

[0250] The second base station is the base station corresponding to the candidate cell of the terminal device.

[0251] In one embodiment of this disclosure, indication information is sent to a second base station. This indication information is used to indicate at least one candidate cell and / or candidate beam for the terminal device of the second base station. The at least one candidate cell and / or candidate beam refers to a cell and / or beam that the terminal device may potentially access. That is, the indication information informs the second base station that the associated terminal device, within the service range of the base station, may potentially or highly likely access at least one candidate cell and / or candidate beam of the base station, or may potentially or highly likely not access at least one candidate cell and / or candidate beam of the base station. The access method can refer to different access methods in different scenarios. In one embodiment, the access method refers to RACH-less access, and one possible scenario is access under a conditional LTM scenario. Specifically, the second base station can perform access preparation for the corresponding terminal based on this information. For example, it can start performing reception detection or scheduling of the UE on a potentially accessing beam to enable the UE to access in RACH-less mode, or stop performing reception detection or scheduling of the UE on a potentially non-accessible beam, etc., which is not limited here.

[0252] In one embodiment of this disclosure, a first base station can receive auxiliary information reported by a terminal device and send indication information to a second base station based on the auxiliary information. In this scenario, the first base station can know the beam or cell situation that the UE can potentially access based on the auxiliary information reported by the UE. Therefore, the first base station notifies the second base station of the corresponding beam information (the target candidate beam and / or target candidate cell included in the auxiliary information reported by the UE) through the indication information. Alternatively, a command to activate the TCI state can be sent to the terminal device. In this scenario, the first base station determines the TCI state of the candidate cells that the UE can activate and notifies the UE to activate the corresponding TCI state. One possible implementation is that if the UE selects RACH-less access, it selects the target beam from the beams of the activated TCI state to achieve RACH-less access. Therefore, the first base station notifies the second base station of the corresponding beam information (i.e., the candidate cell and / or candidate beam whose TCI is activated by the first base station) through the indication information (the order of the first base station sending the candidate cell TCI activation command to the UE and sending the indication information to the second base station is not limited).

[0253] In one embodiment of this disclosure, the indication information may be first indication information for two network nodes, i.e., it may include beam information associated one-to-one between different serving cells and different candidate cells between the two network nodes (optionally, UE information does not need to be associated). Alternatively, it may be indication information for the access status of at least one UE between the two nodes, such as the access status of UE1 and UE2 of the first base station. The serving cells of UE1 and UE2 may belong to different cells or the same cell of the first base station. For the access status of UE1, it may include one or more cells of the second base station, and each cell may contain one or more beams. The indication information may also be UE-level signaling, i.e., only for the access status of one UE, i.e., the access status of one UE of the first base station, which may include one or more cells of the second base station, and each cell may contain one or more beams. This is not limited.

[0254] In one embodiment of this disclosure, after sending indication information to the second base station, in order to ensure that the second base station receives the indication information or to determine that the second base station accepts the indication information, an acknowledgment message sent by the second base station may also be received. The acknowledgment message may provide acknowledgment information for each candidate cell, each terminal device, or each candidate beam.

[0255] The confirmation message may include at least one of the following:

[0256] One or more confirmation messages for whether to acknowledge or reject indication information, wherein the confirmation message is configured for each terminal device, each candidate cell, or each candidate beam. Regarding the indication information sent by the first base station, one possible implementation is that the second base station (regarding access information for a UE, or information for a serving cell or a candidate cell, or information for a signaling signal) can completely accept or completely reject, i.e., it does not reject some information while accepting others. For example, if the first indication information includes potential access beams 31 and 32, and the second base station accepts UE access from beam 31 but does not accept UE access from beam 32, this is not allowed. The second base station can accept UE access from either beam 31 or beam 32, or reject UE access from both beam 31 and beam 32. In one approach, the second base station only needs to reply with an acknowledgment or rejection indication. This indication can be provided for each UE (if the first indication includes multiple UEs), one for each signaling, or one for each serving cell. Another possible implementation is that the second base station (for the access information of a UE, or for the information of a serving cell or a candidate cell, or for the information of a signaling) can reject some information and accept some information. For example, if the first indication includes beams 31 and 32 for potential access, the second base station accepts the UE accessing from beam 31 but does not accept the UE accessing from beam 32. In this implementation, the second base station needs to reply with an acknowledgment or rejection indication for each piece of information (e.g., each candidate cell, each beam, each UE, each serving cell, each candidate cell).

[0257] Identification information of one or more terminal devices, such as simultaneously including UE1 and UE2, wherein UE1 and UE2 are currently serving the same cell of the first base station, or different cells, without restriction;

[0258] One or more beam identification information, wherein the beam identification information may include a synchronization signal block index (SSB index), channel state information-reference signal (CSI-RS) identification information, or other reference signal (RS) identification information, or TCI-State information, such as SSB1, SSB2, etc., wherein if the acknowledgment message contains multiple UEs, each UE is associated with one or more beam identification information, for example, UE1 is associated with SSB1, SSB2, UE2 is associated with SSB5, SSB7, and optionally each beam information is associated with a cell. One implementation is that the beam belongs to the beam of the second base station. Another possible implementation is that the beam is the beam that supports UE access in RACH-less mode.

[0259] One or more candidate cell identification information, which enables the first base station and / or the second base station to identify relevant cell information, such as Cell1, Cell2. If the confirmation message contains multiple UEs, each UE is associated with one or more cell identification information, such as UE1 associated with Cell1, Cell2, and UE2 associated with Cell1, Cell7. In one implementation, the cell belongs to the cell of the second base station. In another possible implementation, the cell is the cell that supports UE access in RACH-less mode.

[0260] At least one indication of whether RACH-less access is performed, for example, the indication may be provided for each beam (second base station) or each cell (second base station), such as SSB1 supporting RACH-less access and SSB2 not supporting RACH-less access;

[0261] At least one RACH-less access type, wherein the RACH-less access type may include dynamically scheduled authorized (DG) or pre-configured authorized (CG) access type. DG access allows the terminal device to listen to the scheduling information of the target cell and send uplink data directly according to the scheduled uplink resources without first requesting resources through RACH. CG access allows the terminal device to use pre-configured resources for data transmission when needed. For example, the indication information may be provided for each beam (second base station) or each cell (second base station). For example, SSB1 supports DG RACH-less access and SSB2 supports CG RACH-less access.

[0262] One or more serving cell identifiers, wherein the serving cell identifier can be a pre-set cell number, etc., which enables the first base station and / or the second base station to identify relevant cell information, wherein the serving cell identifier is the cell of the first base station.

[0263] In one embodiment of this disclosure, the first base station may send at least one candidate cell and / or candidate beam to the terminal device based on the confirmation message, such as sending a candidate cell TCI activation command or sending a first signaling message, wherein the included beam is a beam that the second base station has confirmed can support RACH-less access.

[0264] In this embodiment of the disclosure, if the confirmation information of the indication information includes candidate cells and / or candidate beams that refuse to perform RACH-less access, then the relevant indication information sent to the terminal device (e.g., sending a candidate cell TCI activation command, sending a first signaling) does not carry the candidate cells and / or candidate beams that are refused to perform RACH-less access. Thus, it can be guaranteed that the terminal device does not access the candidate cells and / or candidate beams that refuse to perform RACH-less access in a RACH-less manner.

[0265] Step 202: Receive notification information sent by the second base station, wherein the notification information is used to indicate whether the terminal device is supported to perform at least one candidate cell and / or candidate beam for random access RACH-less access.

[0266] In embodiments of this disclosure, the instruction information and / or notification information includes at least one of the following:

[0267] (1) Identification information of terminal device, wherein the identification information may include the production code of terminal device, the identifier assigned to UE by network device, etc., which enable the first base station and / or the second base station to identify the relevant UE context, and the specific format and the method of allocating the identification information are not limited;

[0268] (2) One or more beam identification information, wherein the beam identification information may include synchronization signal block index SSB index, CSI-RS identification information, or other RS ​​identification information, or TCI-State information, such as including SSB1, SSB2, wherein if the indication information and / or notification information contains multiple UEs, each UE is associated with one or more beam identification information, for example, UE1 is associated with SSB1, SSB2, UE2 is associated with SSB5, SSB7, and optionally each beam information is associated with a cell. In one implementation, the beam belongs to the second base station. In another possible implementation, the beam is the beam that the UE can potentially access or that supports the UE to access in a RACH-less manner.

[0269] (3) One or more candidate cell identification information, the identification of which enables the first base station and / or the second base station to identify the relevant cell information, such as including Cell1, Cell2, wherein if the indication information and / or notification information contains multiple UEs, each UE is associated with one or more cell identification information, such as UE1 associated with Cell1, Cell2, UE2 associated with Cell1, Cell7, one implementation, the cell belongs to the cell of the second base station, one possible implementation, the cell is the cell that the UE can potentially access or that supports the UE to access in RACH-less mode;

[0270] (4) At least one indication of whether RACH-less access is performed, for example, the indication may be provided for each beam (second base station) or each cell (second base station), for example, SSB1 accesses RACH-less and SSB2 does not access RACH-less;

[0271] (5) At least one indication of potential access, such as the indication being provided for each beam (second base station) or each cell (second base station), for example, SSB1 is likely to access, and SSB2 is likely not to access;

[0272] (6) At least one RACH-less access type, wherein the RACH-less access type may include dynamically scheduled authorized (DG) or pre-configured authorized (CG) access type. DG access allows the terminal device to listen to the scheduling information of the target cell and send uplink data directly according to the scheduled uplink resources without first requesting resources through RACH. CG access allows the terminal device to use pre-configured resources for data transmission when needed. For example, the indication information may be provided for each beam (second base station) or each cell (second base station). For example, SSB1 supports DG RACH-less access, and SSB2 supports CG RACH-less access.

[0273] (7) Identification information of one or more serving cells, which may include a pre-set cell number of the serving cell, etc., which enables the first base station and / or the second base station to identify the relevant cell information, wherein the serving cell is identified as a cell of the first base station.

[0274] In one embodiment of this disclosure, a notification message sent by a second base station can be received, wherein the notification message is used to indicate whether the terminal device is supported to perform at least one candidate cell and / or candidate beam for RACH-less access, that is, the second base station indicates whether the terminal device is supported to perform RACH-less access for at least one candidate cell and / or candidate beam through the notification message.

[0275] In one embodiment of this disclosure, before receiving notification information sent by the second base station, a request signaling is sent to the second base station, that is, a request signaling is sent to the second base station of the candidate cell, requesting the candidate cell to support and / or not support the terminal performing RACH-less access.

[0276] The request signaling includes at least one of the following:

[0277] (1) One or more UE identifiers, as described above;

[0278] (2) One or more serving cell identifiers, as described above;

[0279] (3) One or more beam identification information, wherein the beam identification information may include the synchronization signal block index SSB index, CSI-RS identification information, or other RS ​​identification information, or TCI-State identification information, or TCI-State information, and / or measurement results, as described above. Additionally, the beam measurement results may be included here, wherein the form of the measurement results is not limited to whether or not they are filtered, and the form of the measurement quantity is not limited.

[0280] (4) One or more candidate cell identifiers, as described above;

[0281] (5) Whether to execute the RACH-less access instruction information, as described above;

[0282] (6) At least one RACH-less access type, wherein the RACH-less access type may include DG or CG access type, as described above.

[0283] The indication information on whether to implement RACH-less access and at least one RACH-less access type can be configured for each terminal device, each candidate beam, or each candidate cell.

[0284] Optionally, after receiving the notification information sent by the second base station, the first base station may also send a response message to the second base station, which is used to confirm or reject the notification information.

[0285] It should be noted that the network devices mentioned above can be independent base stations, CU nodes of base stations, or DU nodes of base stations. The signaling transmitted between these network devices can be direct interface signaling between base stations, such as Xn / X2 interface signaling (where Xn / X2 is the interface between radio nodes), or signaling sent from the core network, or interface signaling between centralized units (CUs), or signaling sent from a distributed unit (DU) to a CU, such as F1 interface signaling, or signaling forwarded between DUs through different CUs (i.e., signaling from DU1 to CU1, CU1 to CU2, and then from CU2 to DU2), or signaling between DUs, etc. No restrictions are placed here.

[0286] The following specific embodiment illustrates the process by which the first base station, upon receiving auxiliary information from the terminal device indicating beam21, beam31, and beam32 as candidate target beams, determines the access method of the target cell and / or target beam, and triggers interface interaction:

[0287] In this embodiment, the serving cell of the current UE is cell0, the base station where cell0 is located is the first base station, and the network sends signaling to configure candidate cells cell1, cell2, and cell3 for the UE. Cell1 contains candidate beams such as beam11 and beam12, cell2 contains candidate beams such as beam21 and beam22, and cell3 contains candidate beams beam31, beam32, and beam33.

[0288] The UE evaluates whether the candidate cell or candidate beam meets the execution conditions.

[0289] Before the UE evaluates whether a candidate cell or candidate beam meets the execution conditions, the UE triggers auxiliary information reporting to the network. For example, the reported auxiliary information may include beam12, beam22, beam31, and beam32 as candidate target beams.

[0290] The first base station sends inter-interface indication information to the second base station where the candidate cells are located, notifying the second base station of the candidate cells and / or candidate beams for potential UE access. The candidate cells perform RACH-less reception for the UE, or schedule uplink resources for RACH-less access for the UE. The first base station sends inter-interface indication information to candidate cells cell2 and beam31 corresponding to beam21, and candidate cell3 corresponding to beam32 (if cell2 and cell3 belong to different base stations, indication information is sent to each base station separately; if they belong to the same base station, it can be the same message or different messages). Taking cell3 as an example, the specific inter-interface indication information carries at least one of the following: terminal device identification information (used by the network node where cell3 is located to identify the terminal device); one or more beam identification information (e.g., SSB). index, CSI-RS identification information, or other RS ​​identification information, or TCI-State information, etc., such as beam31 and beam32; candidate cell identification information, such as cell3; indication information on whether to perform RACH-less access; RACH-less access type (DG or CG); one or more measurement results, identification information of the serving cell, such as cell0; wherein the indication information on whether to perform RACH-less access, the RACH-less access type can be provided for each candidate beam, or it can be provided for each candidate cell, etc.

[0291] In this embodiment, the first base station can also obtain an acknowledgment message sent by the second base station. The acknowledgment message is used to acknowledge or reject the indication information sent by the first base station. The acknowledgment message may include at least one of the following: one or more acknowledgment messages regarding whether to acknowledge or reject the indication information; identification information of one or more terminal devices; identification information of one or more beams; identification information of one or more candidate cells; indication information regarding whether at least one candidate cell and / or candidate beam performs RACH-less access; the RACH-less access type of at least one candidate cell and / or candidate beam; and one or more serving cell identifiers. Similarly, the acknowledgment message can be configured for each candidate beam (i.e., multiple acknowledgment messages when there are multiple candidate beams), or for each terminal device (i.e., multiple acknowledgment messages when there are multiple terminal devices), or for each candidate cell (i.e., multiple acknowledgment messages when there are multiple candidate cells), or one message can be configured per signaling signal (i.e., complete acceptance or complete rejection).

[0292] If the rejection message contains candidate cells and / or candidate beams that are rejected from performing RACH-less, then the relevant indication information (such as TCI activation command, etc.) sent by the first base station to the terminal device does not carry the candidate cells and / or candidate beams that are rejected from performing RACH-less.

[0293] Therefore, the second base station corresponding to the candidate cell can determine, based on the inter-interface indication information sent by the first base station, whether to perform RACH-less access for the corresponding UE on the corresponding candidate cell and / or candidate beam. For example, it can detect uplink reception on the corresponding beam or send scheduling information on the corresponding beam to schedule uplink resources for the UE's first uplink transmission. On other beams, the candidate cell can be considered as not performing RACH-less access for the UE.

[0294] In this embodiment, before the UE evaluates the candidate cell and / or candidate beam to meet the preset execution conditions, the network side triggers the TA acquisition or candidate cell TCI activation process.

[0295] In this embodiment, when at least one candidate cell and / or candidate beam meets the execution conditions, for example, if the UE determines that the target beam is beam31 and the UE determines that the auxiliary information reported by the network side includes beam31 as a candidate target beam, then the UE determines to perform RACH-less access on beam31; for example, if the target beam is beam21 and the UE determines that the reported auxiliary information does not include beam21 as a candidate target beam, then the UE determines to perform RACH access on the target beam.

[0296] In determining whether a target beam meets preset access conditions, the UE can also combine other preset access conditions for a comprehensive judgment. For example, after determining that beam31 is a candidate target beam in the auxiliary information reported by the network side, beam31 must also meet at least one of the following conditions; otherwise, RACH access will be performed:

[0297] 1) The UE has a valid TA value for beam31, which can be a TA value obtained through a network-triggered TA acquisition process and provided via relevant signaling, or a TA value obtained based on UE measurements, and the TA is valid. A valid TA value indicates that the TA value can be applied to the target cell and / or target beam. Optionally, based on UE measurements of beam31, the UE indicates to the network that the TA value for beam31 has been obtained.

[0298] 2) The UE has uplink pre-configured resources associated with beam31. For example, the network provides uplink resources for beam31 to perform RACH-Less access through uplink pre-configuration information or other configuration information.

[0299] 3) The UE activates the TCI state of beam31. Optionally, the UE can activate the corresponding TCI based on network signaling, or the UE can activate the TCI of beam31. For example, the TCI associated with beam31 can be activated after or before the preset execution conditions are met. The TCI can be used for both uplink transmission and downlink reception, or it can be a TCI used for uplink transmission and / or a TCI used for downlink reception. The TCI can also be used to specify a channel.

[0300] 4) Determine the target cell and / or target beam, i.e., cell3 or beam31, which supports dynamic scheduling access.

[0301] Taking conditions 1)-4) above as an example, other access conditions in the specific embodiments described above are not excluded and are not limited here.

[0302] In summary, the cell access processing method of this disclosure embodiment sends indication information to a second base station, wherein the indication information is used to indicate at least one candidate cell and / or candidate beam for the terminal device of the second base station; and / or receives a notification message sent by the second base station, wherein the notification message is used to indicate whether the terminal device supports at least one candidate cell and / or candidate beam for performing RACH-less access. That is, based on whether the candidate cell and / or candidate beam corresponding to the terminal device indicated by the relevant base station supports RACH-less access, the terminal device can select the target cell and / or target beam for RACH-less access.

[0303] The following description focuses on the cell access processing method of this disclosure from the perspective of the second base station. Figure 3 is a flowchart of another embodiment of the cell access processing method of this disclosure. As shown in Figure 3, the method includes steps 301 and 302, wherein steps 301 and 302 can be executed selectively or both can be executed, that is, steps 301 and 302 are executed in an AND / OR relationship, and steps 301 and 302 are not necessarily executed sequentially.

[0304] Step 301: Receive indication information sent by the first base station, wherein the indication information is used to indicate at least one candidate cell and / or candidate beam of the second base station terminal device.

[0305] In one embodiment of this disclosure, an indication message sent by a first base station is received. This indication message is used to indicate at least one candidate cell and / or candidate beam for a second base station terminal device. Optionally, the access method can be understood as RACH-less access, meaning the indication message conveys to the first base station that the terminal device associated with the second base station, within the service range of that base station, is potentially or highly likely to access at least one candidate cell and / or candidate beam of that base station, or is potentially or highly likely not to access at least one candidate cell and / or candidate beam of that base station. The access method can refer to different access methods in different scenarios. In one embodiment, the access method refers to RACH-less access, one possible scenario being access under a conditional LTM scenario. Specifically, the second base station can perform access preparation for the corresponding terminal based on this information. For example, it can start performing reception detection or scheduling of the UE in a potentially accessible beam to achieve RACH-less access, or stop performing reception detection or scheduling of the UE in a potentially unaccessible beam, etc., without limitation.

[0306] In one embodiment of this disclosure, after receiving the indication information initiated by the first base station, a confirmation message may also be sent to the first base station, wherein the confirmation message includes at least one of the following:

[0307] (1) One or more confirmation messages for whether to acknowledge or reject the instruction;

[0308] (2) Identification information of one or more terminal devices;

[0309] (3) One or more beam identification information;

[0310] (4) One or more candidate cell identifiers;

[0311] (5) At least one indication of whether RACH-less access is performed;

[0312] (6) At least one indication of whether access is granted;

[0313] (7) Configuration information for at least one RACH-less access type;

[0314] (8) One or more serving cell identifiers.

[0315] Step 302: Send a notification message to the first base station, wherein the notification message is used to indicate whether the terminal device supports at least one candidate cell and / or candidate beam for performing RACH-less access.

[0316] In one embodiment of this disclosure, a second base station sends a notification message to a first base station. This notification message indicates whether the second base station supports at least one candidate cell and / or candidate beam for RACH-less access for the associated terminal device. Specifically, the notification message conveys to the first base station that within its service range, the second base station either supports or does not support candidate cells and / or candidate beams for RACH-less access for the associated terminal device. The notification message can be sent once or multiple times as needed. If sent multiple times, the most recently acquired notification message prevails. Alternatively, other methods can be used to summarize the final notification message based on multiple acquired notification messages. The first base station can send relevant messages to the terminal device based on the notification message, such as a TCI activation command or an air interface notification message.

[0317] The instruction information and / or notification message includes at least one of the following:

[0318] (1) Identification information of the terminal device;

[0319] (2) One or more beam identification information;

[0320] (3) One or more candidate cell identifiers;

[0321] (4) At least one indication of whether RACH-less access is performed;

[0322] (5) At least one indication of potential access;

[0323] (6) Configuration information for at least one RACH-less access type;

[0324] (7) Identification information of one or more serving cells.

[0325] In one embodiment of this disclosure, before the first base station sends a notification message, a request signaling is received from the first base station requesting the candidate cell to support and / or not support the terminal performing RACH-less access. The request signaling includes at least one of the following:

[0326] (1) One or more UE identifiers;

[0327] (2) One or more serving cell identifiers;

[0328] (3) One or more beam identification information;

[0329] (4) One or more candidate cell identifiers;

[0330] (5) Whether to execute the RACH-less access instruction;

[0331] (6) Configuration information for at least one RACH-less access type.

[0332] Based on the above description, in one embodiment of this disclosure, the second base station can indicate to the terminal device via a notification message whether the second base station supports at least one candidate cell and / or candidate beam for performing RACH-less access. The scheme for the second base station to send a notification message to the first base station is described below with reference to specific embodiments:

[0333] In this example, the specific steps include:

[0334] Step 1: The network side sends signaling to configure candidate cells cell1, cell2, and cell3 for the UE. Cell1 contains candidate beams such as beam11 and beam12, cell2 contains candidate beams such as beam21 and beam22, and cell3 contains candidate beams beam31, beam32, and beam33.

[0335] Step 2: The UE evaluates whether the candidate cells and / or candidate beams meet the preset execution conditions;

[0336] Step 3: Optionally, before the UE evaluates the candidate cell and / or candidate beam to meet the preset execution conditions, the UE triggers the auxiliary information to report to the network side. Optionally, the first base station can trigger the aforementioned process of sending indication information to the second base station, which is not restricted again.

[0337] Step 4: Before the UE evaluates the candidate cells and / or candidate beams to meet the preset execution conditions, the network side triggers the TA acquisition or candidate cell TCI activation process, etc.

[0338] Step 5: Optionally, before the UE evaluates that the candidate cell and / or candidate beam meet the preset execution conditions, the network side sends a first signaling instruction to indicate that the UE can execute the RACH-LESS candidate cell or candidate beam (e.g., beam31, beam22 or cell3), or cannot execute the RACH-LESS candidate cell or candidate beam (e.g., beam22 or cell2), etc.

[0339] Steps 4 and 5 can coexist, or only one of them can exist. When they coexist, the order of their existence is not important.

[0340] Step 6: In this example, optionally, the following inter-interface procedure is triggered before, simultaneously with, or after triggering Step 4 / 5.

[0341] Optionally, the first base station sends a request signaling to the second base station, wherein the request signaling includes at least one of the following:

[0342] (1) One or more UE identifiers, such as UE;

[0343] (2) One or more serving cell identifiers, such as cell0;

[0344] (3) One or more beam identification information, such as beam31, beam22;

[0345] (4) One or more candidate cell identifiers, such as cell3, cell2;

[0346] (5) Whether to execute the RACH-less access instruction, such as executing RACH-less;

[0347] (6) Configuration information for at least one RACH-less access type, such as DG or CG.

[0348] Optionally, the second base station sends a notification message to the first base station, indicating that the UE can perform RACH-less access in beam 31 or cell 3; or the second base station does not indicate via signaling that the UE cannot perform RACH-less access in beam 31 or cell 3, then it is determined that RACH-less access is performed in the target beam 31. In one example, the notification message includes at least one of the following:

[0349] (1) Identification information of the terminal device;

[0350] (2) One or more beam identification information, such as beam31;

[0351] (3) One or more candidate cell identifiers, such as cell3;

[0352] (4) At least one indication of whether RACH-less access is to be performed, for example, RACH-less can be performed;

[0353] (5) Configuration information for at least one RACH-less access type, such as DG;

[0354] (6) At least one indication of whether access is granted;

[0355] (7) Identification information of one or more serving cells, such as cell0.

[0356] Optionally, the first base station sends a response message to the second base station, which is used to confirm or reject the notification information to the second base station:

[0357] Step 7: In this example, if the second base station indicates to the UE beam22 or cell2 via a notification message that RACH-Less access cannot be performed, or if the second base station does not indicate to the UE beam22 or cell2 that RACH-Less access can be performed, then it is determined that beam22 or cell2 cannot perform RACH-Less access. If the second base station indicates to the UE beam31 or cell3 via a notification message that RACH-Less access can be performed, or if the second base station does not indicate to the UE beam31 or cell3 that RACH-Less access cannot be performed, then it is determined that beam31 or cell3 can perform RACH-Less access. The serving cell determines the TCI that can be activated by the candidate cell based on the inter-interface notification message or the inter-interface first request signaling, and configures the candidate cell and activation / deactivation TCI included in step 4.

[0358] In this example, when the UE determines whether RACH-less access can be performed, the target beam must also meet at least one condition; otherwise, RACH access will be performed:

[0359] 1) The UE has a valid TA value for the target cell or target beam. This TA value can be obtained through a network-triggered TA acquisition process and provided via signaling, or it can be a TA value obtained based on UE measurements, and the TA is valid. A valid TA value indicates that the TA value can be applied to the target cell and / or target beam. Optionally, based on the TA value obtained by the UE measurements, the UE indicates to the network that it has acquired the TA value for the target cell or target beam.

[0360] 2) The UE has uplink pre-configured resources associated with the target cell or target beam. For example, the network side provides uplink resources for the target beam to perform RACH-Less access through pre-configuration information or other configuration information.

[0361] 3) The UE activates the TCI state of the target cell or target beam. Optionally, the UE can activate the corresponding TCI based on network signaling, or the UE can activate the TCI of the target beam. For example, the TCI associated with the target beam can be activated after or before the preset execution conditions are met. The TCI can be used for both uplink transmission and downlink reception, or it can be a TCI used for uplink transmission and / or a TCI used for downlink reception. The TCI can also be used to specify a channel.

[0362] 4) Determine the target cell and / or target beam, i.e., cell3 or beam31, which supports dynamic scheduling access.

[0363] Taking conditions 1)-4) above as an example, other access conditions in the specific embodiments described above are not excluded and are not limited here.

[0364] Then, the UE uses the pre-configured information of the target cell to execute either RACH-LESS or RACH access mode. Details will not be elaborated further.

[0365] In summary, the cell access processing method of this disclosure embodiment receives indication information sent by a first base station, wherein the indication information is used to indicate at least one candidate cell and / or candidate beam for a second base station terminal device; and / or sends a notification message to the first base station, wherein the notification message is used to indicate whether the terminal device supports at least one candidate cell and / or candidate beam for performing RACH-less access. In this technical solution, the relevant base station can indicate whether the terminal device supports at least one candidate cell and / or candidate beam for performing RACH-less access, so that the terminal device can select the target cell and / or target beam for RACH-less access.

[0366] To implement the above embodiments, this disclosure also proposes a terminal device. Figure 4 is a schematic diagram of the structure of a terminal device according to an embodiment of this disclosure. As shown in Figure 4, the terminal device includes: a memory 410, a transceiver 420, and a processor 430. The memory 410 is used to store computer programs; the transceiver 420 is used to send and receive data under the control of the processor 410; and the processor 430 is used to read the computer program in the memory 410 and perform the following operations:

[0367] The target cell and / or target beam are determined from the candidate cells and / or candidate beams that meet the preset execution conditions;

[0368] If the target cell and / or target beam are determined to meet the preset access conditions, access to the target cell and / or target beam is triggered in a RACH-less manner.

[0369] Referring to Figure 4, the terminal device may also include a user interface to facilitate the provision of call services, etc.

[0370] In Figure 4, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits of one or more processors (represented by processors) and memories (represented by memory). The bus architecture can also link various other circuits, such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. A transceiver can be multiple components, including transmitters and receivers, providing a unit for communicating with various other devices over a transmission medium, including wireless channels, wired channels, optical fibers, etc. For different user equipment, the user interface can also be an interface capable of connecting external or internal devices, including but not limited to keypads, displays, speakers, microphones, joysticks, etc.

[0371] The processor manages the bus architecture and general processing, while the memory stores the data used by the processor during operation. Optionally, the processor can be a CPU (Central Processing Unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a CPLD (Complex Programmable Logic Device). The processor can also employ a multi-core architecture.

[0372] The processor executes any of the methods provided in the embodiments of this disclosure by invoking a program stored in memory, according to the obtained executable instructions. The processor and memory may also be physically separated.

[0373] In one possible implementation of this disclosure, determining that the target cell and / or target beam meet preset access conditions includes at least one of the following:

[0374] It is confirmed that the terminal device has acquired the effective timing advance (TA) value of the target cell and / or target beam;

[0375] It is determined that the terminal device has acquired the uplink pre-configured resources associated with the target cell and / or the target beam;

[0376] Determine the Transmission Configuration Indication (TCI) state for when the terminal device activates the target cell and / or target beam;

[0377] The candidate target cell or candidate target beam indicated in the auxiliary information reported by the terminal device to the network side is determined to contain the target cell and / or target beam;

[0378] The auxiliary information reported by the terminal device to the network side is determined to include the Activated Transmission Configuration Indication (TCI) for the target cell and / or target beam.

[0379] Determine if the network side instructs the terminal device to access the target cell or target beam in a RACH-less manner;

[0380] The timing of the terminal device accessing the target cell and / or target beam is determined to be within the preset associated time period of the target cell and / or target beam;

[0381] Determine if the target cell and / or target beam support dynamic scheduling access;

[0382] Determine if the terminal is within the specified location area;

[0383] Determine that the terminal has performed and / or been instructed to perform CSI measurements and / or report on the target beam or target cell;

[0384] Determine that the terminal supports the specified service.

[0385] In one possible implementation of this disclosure, when there are multiple candidate cells and / or candidate beams that meet preset execution conditions,

[0386] Determining the target cell and / or target beam from candidate cells and / or candidate beams that meet preset execution conditions includes:

[0387] Based on preset selection conditions, a target cell and / or target beam are determined from a plurality of candidate cells and / or candidate beams that meet preset execution conditions. The determination of the target cell and / or target beam based on preset selection conditions includes at least one of the following:

[0388] From multiple candidate cells and / or candidate beams that meet preset execution conditions, the terminal device selects candidate cells and / or candidate beams as target cells and / or target beams based on the implementation.

[0389] From multiple candidate cells and / or candidate beams that meet the preset execution conditions, select the candidate cell and / or candidate beam with the best link quality at the current time as the target cell and / or target beam;

[0390] From multiple candidate cells and / or candidate beams that meet preset execution conditions, select at least one candidate target cell and / or candidate target beam contained in the auxiliary information reported by the terminal device to the network side, and select the candidate target cell and / or candidate target beam with the best link quality at the time of auxiliary information reporting as the target cell and / or target beam.

[0391] From multiple candidate cells and / or candidate beams that meet the preset execution conditions, select the candidate cell and / or candidate beam that arrives first with the pre-configured uplink resources as the target cell or target beam.

[0392] From multiple candidate beams that meet the preset execution conditions, determine the cells corresponding to each candidate beam, and select the cell with the most candidate beams as the target cell based on the number of candidate beams contained in each cell.

[0393] From multiple candidate beams that meet the preset execution conditions, select multiple candidate target beams contained in the auxiliary information reported by the terminal device to the network side, determine the cells corresponding to the multiple candidate target beams respectively, and select the cell containing the most candidate target beams as the target cell based on the number of candidate target beams contained in each cell.

[0394] From multiple candidate cells and / or candidate beams that meet the preset execution conditions, select the candidate target cell and / or candidate target beam contained in the auxiliary information reported by the terminal device to the network side as the target cell and / or target beam;

[0395] From multiple candidate cells and / or candidate beams that meet the preset execution conditions, select the candidate cell and / or candidate beam on the candidate cell that has completed the candidate configuration information preprocessing as the target cell and / or target beam;

[0396] From multiple candidate cells and / or candidate beams that meet the preset execution conditions, select the candidate cell and / or candidate beam that the network side indicates to perform RACH-less access as the target cell and / or target beam;

[0397] From multiple candidate cells and / or candidate beams that meet the preset execution conditions, select the candidate cell and / or candidate beam that matches the current time as the target cell or target beam according to the preset association time period of the candidate cells and / or candidate beams.

[0398] From multiple candidate cells and / or candidate beams that meet the preset execution conditions, select the candidate cells and / or candidate beams that have completed Transmission Configuration Indication (TCI) activation and / or Channel State Indication (CSI) measurement and / or CSI measurement reporting as the target cell and / or target beam.

[0399] From a plurality of candidate cells and / or candidate beams that meet the preset execution conditions, select the candidate cell and / or candidate beam that indicates the execution of the Channel State Indication (CSI) measurement reporting as the target cell and / or target beam.

[0400] In one possible implementation of this disclosure, the reporting trigger time for auxiliary information reported by the terminal device to the network side includes:

[0401] Before the terminal device performs target cell and / or target beam access, it reports auxiliary information to the network side; or...

[0402] Before the terminal device determines the target cell and / or target beam, it reports auxiliary information to the network side; or...

[0403] According to the period configured on the network side, auxiliary information is periodically reported to the network side; or,

[0404] Auxiliary information is reported to the network side based on preset reporting trigger conditions; or,

[0405] Auxiliary information is reported to the network side based on the request message sent by the network side.

[0406] In one possible implementation of this disclosure, the auxiliary information reported by the terminal device to the network side includes at least one of the following:

[0407] Identification information for at least one or more candidate cells and / or candidate beams;

[0408] TCI information for at least one or more candidate cells and / or candidate beams that has been activated or may be activated;

[0409] Information indicating whether one or more candidate cells and / or candidate beams are candidate target cells or candidate target beams;

[0410] One or more channel quality-related measurements of at least one or more candidate cells and / or candidate beams.

[0411] In one possible implementation of this disclosure, determining that the network side instructs the terminal device to access the target cell and / or target beam in a RACH-less manner includes:

[0412] Upon receiving the relevant information about RACH-less access configured in the pre-configured message from the network side, determine whether the target cell and / or target beam can be accessed via RACH-less; or...

[0413] The receiving network side indicates whether RACH-less access can be performed by using a notification message to indicate whether the candidate cell and / or candidate beam can be used.

[0414] In one possible implementation of this disclosure, the target cell and / or target beam have a preset association time period, including:

[0415] By configuring non-periodic associated time periods on the network side; or...

[0416] The associated time period is determined by the period configured on the network side.

[0417] In one possible implementation of this disclosure, the start time of the associated time period includes:

[0418] Use the start time that the terminal device receives the configured start time as the start time, or...

[0419] The start time is defined as the moment when the terminal device receives the preset execution conditions, or...

[0420] The start time is defined as the moment when the candidate target cell and / or candidate target beam, as indicated in the auxiliary information reported by the terminal device, contains the target cell and / or target beam.

[0421] The start time is determined based on the second signaling sent from the network side.

[0422] To implement the above embodiments, this disclosure also proposes a first base station. Figure 5 is a schematic diagram of the structure of the first base station proposed in this disclosure. As shown in Figure 5, the first base station includes: a memory 510, a transceiver 520, and a processor 530.

[0423] Memory 510 is used to store computer programs; transceiver 520 is used to send and receive data under the control of the processor; processor 530 is used to read the computer programs in memory and perform the following operations:

[0424] Send indication information to the second base station, wherein the indication information is used to indicate at least one candidate cell and / or candidate beam of the second base station terminal equipment; and / or,

[0425] The terminal device receives a notification message sent by the second base station, wherein the notification message is used to indicate whether the terminal device supports at least one candidate cell and / or candidate beam for performing RACH-less access.

[0426] In Figure 5, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits of one or more processors (represented by a processor) and memories (represented by memory). The bus architecture can also link various other circuits, such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides the interface. The transceiver can be multiple components, including a transmitter and a receiver, providing a unit for communicating with various other devices over a transmission medium, including wireless channels, wired channels, optical fibers, etc. The processor is responsible for managing the bus architecture and general processing, and the memory can store data used by the processor 530 during operation.

[0427] The processor can be a central processing unit (CPU), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device (CPLD). The processor can also adopt a multi-core architecture.

[0428] In one possible implementation of this disclosure, the indication information and / or notification message includes at least one of the following:

[0429] Identification information of the terminal device;

[0430] One or more beam identification information;

[0431] One or more candidate cell identifiers;

[0432] At least one indication message indicating whether RACH-less access is performed;

[0433] At least one indication of whether access is granted;

[0434] Configuration information for at least one RACH-less access type;

[0435] Identification information for one or more service cells.

[0436] In one possible implementation of this disclosure, the processor is further configured to: after sending indication information to the second base station, further include:

[0437] Receive confirmation messages sent by the second base station;

[0438] The confirmation message contains at least one of the following:

[0439] One or more confirmation messages indicating whether to accept or reject the instruction;

[0440] Identification information of one or more terminal devices;

[0441] One or more beam identification information;

[0442] One or more candidate cell identifiers;

[0443] At least one indication message indicating whether RACH-less access is performed;

[0444] Configuration information for at least one RACH-less access type;

[0445] One or more service cell identifiers.

[0446] In one possible implementation of this disclosure, the processor is further configured to send a request signaling to the second base station before receiving a notification message from the second base station. The request signaling includes:

[0447] One or more UE identifiers;

[0448] One or more serving cell identifiers;

[0449] One or more beam identification information;

[0450] One or more candidate cell identifiers;

[0451] Instructions on whether to implement RACH-less access;

[0452] Configuration information for at least one RACH-less access type.

[0453] To implement the above embodiments, this disclosure also proposes a second base station. A schematic diagram of the second base station can be seen in Figure 5. The second base station includes: a memory 510, a transceiver 520, and a processor 530.

[0454] Memory 510 is used to store computer programs; transceiver 520 is used to send and receive data under the control of the processor; processor 530 is used to read the computer programs in memory and perform the following operations:

[0455] The system receives indication information transmitted by the first base station, wherein the indication information is used to indicate at least one candidate cell and / or candidate beam to the second base station terminal equipment; and / or,

[0456] A notification message is sent to the first base station, wherein the notification message is used to indicate whether the terminal device supports at least one candidate cell and / or candidate beam for performing RACH-less access.

[0457] In one possible implementation of this disclosure, the indication information and / or notification message includes at least one of the following:

[0458] Identification information of the terminal device;

[0459] One or more beam identification information;

[0460] One or more candidate cell identifiers;

[0461] At least one indication message indicating whether RACH-less access is performed;

[0462] At least one indication of whether access is granted;

[0463] Configuration information for at least one RACH-less access type;

[0464] Identification information for one or more service cells.

[0465] In one possible implementation of this disclosure, the processor is further configured to send an acknowledgment message to the first base station after receiving the indication information sent by the first base station, wherein the acknowledgment message includes at least one of the following:

[0466] One or more confirmation messages indicating whether to accept or reject the instruction;

[0467] Identification information of one or more terminal devices;

[0468] One or more beam identification information;

[0469] One or more candidate cell identifiers;

[0470] At least one indication message indicating whether RACH-less access is performed;

[0471] At least one indication of whether access is granted;

[0472] Configuration information for at least one RACH-less access type;

[0473] One or more service cell identifiers.

[0474] In one possible implementation of this disclosure, the processor is further configured to: before sending a notification message to the first base station, receive a request signaling sent by the first base station, requesting the candidate cell to support and / or not support the terminal performing RACH-less access, wherein the request signaling includes at least one of the following:

[0475] One or more UE identifiers;

[0476] One or more serving cell identifiers;

[0477] One or more beam identification information;

[0478] One or more candidate cell identifiers;

[0479] Instructions on whether to implement RACH-less access;

[0480] Configuration information for at least one RACH-less access type.

[0481] It should be noted that the apparatus provided in this embodiment of the invention can implement all the method steps implemented in the above method embodiment and can achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0482] To implement the above embodiments, this disclosure also proposes a cell access processing device, which is applied to a terminal device. Figure 6 is a schematic diagram of the structure of a cell access processing device according to an embodiment of this disclosure. As shown in Figure 6, the cell access processing device includes: a determining module 610 and an access processing module 620, wherein...

[0483] The determination module 610 is used to determine the target cell and / or target beam from candidate cells and / or candidate beams that meet preset execution conditions;

[0484] The access processing module 620 is used to trigger access to the target cell and / or target beam in a RACH-less manner if it is determined that the target cell and / or target beam meet the preset access conditions.

[0485] It should be noted that the apparatus provided in this embodiment of the invention can implement all the method steps implemented in the above method embodiment and can achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0486] To implement the above embodiments, this disclosure also proposes a cell access processing apparatus applied to a first base station. Figure 7 is a schematic structural diagram of a cell access processing apparatus according to an embodiment of this disclosure. As shown in Figure 7, the cell access processing apparatus includes: a first transmitting module 710, and / or a first receiving module 720, wherein...

[0487] The first transmitting module 710 is configured to transmit indication information to the second base station, wherein the indication information is used to indicate at least one candidate cell and / or candidate beam of the second base station terminal equipment; and / or,

[0488] The first receiving module 720 is used to receive a notification message sent by the second base station, wherein the notification message is used to indicate whether the terminal device supports at least one candidate cell and / or candidate beam for performing RACH-less access.

[0489] It should be noted that the apparatus provided in this embodiment of the invention can implement all the method steps implemented in the above method embodiment and can achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0490] To implement the above embodiments, this disclosure also proposes a cell access processing apparatus applied to a second base station. Figure 8 is a schematic structural diagram of a cell access processing apparatus according to an embodiment of this disclosure. As shown in Figure 8, the cell access processing apparatus includes: a second receiving module 810, and / or a second transmitting module 820, wherein...

[0491] The second receiving module 810 is configured to receive indication information transmitted by the first base station, wherein the indication information is used to indicate at least one candidate cell and / or candidate beam of the second base station terminal equipment; and / or,

[0492] The second sending module 820 is used to send a notification message to the first base station, wherein the notification message is used to indicate whether the terminal device supports at least one candidate cell and / or candidate beam for performing RACH-less access.

[0493] It should be noted that the division of units in the embodiments of this disclosure is illustrative and only represents one logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of this disclosure can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units described above can be implemented in hardware or as software functional units.

[0494] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of this disclosure, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods of the various embodiments of this disclosure.

[0495] It should be noted that the apparatus provided in this embodiment can implement all the method steps implemented in the above method embodiment and can achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0496] This disclosure also provides a processor-readable storage medium storing a program for causing a processor to execute the aforementioned probe reference signal processing method. The processor-readable storage medium can be any available medium or data storage device accessible to the processor, including but not limited to magnetic storage (e.g., floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO), etc.), optical storage (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor storage (e.g., ROMs, EPROMs, EEPROMs, non-volatile memory (NAND flash), solid-state drives (SSDs)).

[0497] Those skilled in the art will understand that embodiments of this disclosure can be provided as methods, apparatus, or computer program products. Therefore, this disclosure can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this disclosure can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0498] This disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus, and computer program products according to embodiments of this disclosure. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in one or more flowchart illustrations and / or one or more block diagrams.

[0499] These processor-executable instructions may also be stored in a processor-readable memory that can instruct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means that implement the functions specified in one or more flowcharts and / or one or more block diagrams.

[0500] Obviously, those skilled in the art can make various modifications and variations to this disclosure without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims of this disclosure and their equivalents, this disclosure is also intended to include such modifications and variations.

[0501] The cell access processing method disclosed herein enables the terminal device to decide whether to access the target cell and / or target beam in a RACH-less manner, reducing the implementation complexity on the network side during cell access processing and possessing strong industrial applicability.

Claims

1. A method for processing cell access, characterized in that, The method is applied to a terminal device and includes: The target cell and / or target beam are determined from the candidate cells and / or candidate beams that meet the preset execution conditions; If it is determined that the target cell and / or the target beam meet the preset access conditions, then access to the target cell and / or the target beam is triggered in a RACH-less manner.

2. The method as described in claim 1, characterized in that, Determining that the target cell and / or the target beam meet preset access conditions includes at least one of the following: It is determined that the terminal device has acquired the effective timing advance (TA) value of the target cell and / or the target beam; It is determined that the terminal device has acquired the uplink pre-configured resources associated with the target cell and / or the target beam; Determine the Transmission Configuration Indication (TCI) state in which the terminal device activates the target cell and / or the target beam; The auxiliary information reported by the terminal device to the network side indicates that the candidate target cell or candidate target beam includes the target cell and / or the target beam; It is determined that the auxiliary information reported by the terminal device to the network side includes the Activation Transmission Configuration Indication (TCI) for the target cell and / or the target beam; The network side instructs the terminal device to access the target cell and / or the target beam in the RACH-less manner; The time when the terminal device performs access to the target cell and / or the target beam is determined to be within a preset associated time period of the target cell and / or the target beam; It is determined that the target cell and / or the target beam support access via dynamic scheduling. The terminal is determined to be within the specified location area; It is determined that the terminal has performed and / or been instructed to perform CSI measurements and / or report on the target beam or target cell; It is determined that the terminal is serving the specified service.

3. The method as described in claim 1 or 2, characterized in that, When there are multiple candidate cells and / or candidate beams that meet the preset execution conditions. The step of determining the target cell and / or target beam from candidate cells and / or candidate beams that meet preset execution conditions includes: Based on preset selection conditions, the target cell and / or target beam are determined from multiple candidate cells and / or candidate beams that meet the preset execution conditions; The step of determining the target cell and / or target beam from multiple candidate cells and / or candidate beams that meet preset selection conditions, based on preset selection conditions, includes at least one of the following: From a plurality of candidate cells and / or candidate beams that meet preset execution conditions, the terminal device selects candidate cells and / or candidate beams as target cells and / or target beams based on the implementation. From multiple candidate cells and / or candidate beams that meet the preset execution conditions, select the candidate cell and / or candidate beam with the best link quality at the current time as the target cell and / or target beam; From a plurality of candidate cells and / or candidate beams that meet preset execution conditions, at least one candidate target cell and / or candidate target beam contained in the auxiliary information reported by the terminal device to the network side is selected, and the candidate target cell and / or candidate target beam with the best link quality corresponding to the time when the auxiliary information is reported is selected as the target cell and / or target beam. From multiple candidate cells and / or candidate beams that meet the preset execution conditions, select the candidate cell and / or candidate beam that arrives first with the pre-configured uplink resources as the target cell or target beam. From multiple candidate beams that meet preset execution conditions, determine the cells corresponding to each of the multiple candidate beams, and select the cell with the most candidate beams as the target cell based on the number of candidate beams contained in each cell. From multiple candidate beams that meet preset execution conditions, select multiple candidate target beams contained in the auxiliary information reported by the terminal device to the network side, determine the cells corresponding to the multiple candidate target beams respectively, and select the cell containing the most candidate target beams as the target cell based on the number of candidate target beams contained in each cell. From a plurality of candidate cells and / or candidate beams that meet preset execution conditions, the candidate target cell and / or candidate target beam contained in the auxiliary information reported by the terminal device to the network side is selected as the target cell and / or target beam. From multiple candidate cells and / or candidate beams that meet the preset execution conditions, select the candidate cell and / or candidate beam on the candidate cell that has completed the candidate configuration information preprocessing as the target cell and / or target beam; From a plurality of candidate cells and / or candidate beams that meet preset execution conditions, select the candidate cell and / or candidate beam that the network side indicates to execute the RACH-less access method as the target cell and / or target beam; From multiple candidate cells and / or candidate beams that meet preset execution conditions, select the candidate cell and / or candidate beam that matches the current time as the target cell or target beam according to the preset associated time period of the candidate cell and / or the candidate beam; From multiple candidate cells and / or candidate beams that meet the preset execution conditions, select the candidate cells and / or candidate beams that have completed Transmission Configuration Indication (TCI) activation and / or Channel State Indication (CSI) measurement and / or CSI measurement reporting as the target cell and / or target beam. From multiple candidate cells and / or candidate beams that meet the preset execution conditions, select the candidate cell and / or candidate beam that indicates the execution of the Channel State Indication (CSI) measurement reporting as the target cell and / or target beam.

4. The method according to any one of claims 1-3, characterized in that, The reporting trigger time for auxiliary information reported by the terminal device to the network side includes: Before the terminal device performs access to the target cell and / or the target beam, it reports auxiliary information to the network side; or... The terminal device, upon determining the target cell and / or the target beam, reports auxiliary information to the network side; or... According to the period configured on the network side, auxiliary information is periodically reported to the network side; or, Auxiliary information is reported to the network side based on preset reporting trigger conditions; or, Auxiliary information is reported to the network side based on the request message sent by the network side.

5. The method according to any one of claims 1-4, characterized in that, The auxiliary information reported by the terminal device to the network side includes at least one of the following: Identification information for at least one or more candidate cells and / or candidate beams; TCI information for at least one or more candidate cells and / or candidate beams that has been activated or may be activated; Information indicating whether one or more candidate cells and / or candidate beams are candidate target cells or candidate target beams; One or more channel quality-related measurements of at least one or more candidate cells and / or candidate beams.

6. The method according to any one of claims 1-5, characterized in that, The determination of the network side instructing the terminal device to access the target cell and / or the target beam in the RACH-less manner includes: Upon receiving the RACH-less access configuration information from the network side via a pre-configured message, determine whether the target cell and / or the target beam can be accessed via RACH-less; or... The receiving network side indicates via the first signaling whether RACH-less access can be performed on the candidate cell and / or candidate beam.

7. The method according to any one of claims 1-6, characterized in that, The preset association time period of the target cell and / or the target beam includes: The preset associated time period, which occurs non-periodically as configured on the network side; or... The preset associated time period is configured to occur through the network side.

8. The method according to any one of claims 1-7, characterized in that, The start time of the preset associated time period includes: The start time is determined by the terminal device receiving the configured start time, or... The start time is defined as the moment when the terminal device receives the execution condition, or... The start time is defined as the moment when the candidate target cell and / or candidate target beam indicated in the auxiliary information reported by the terminal device includes the target cell and / or the target beam, or... The start time is determined based on the second signaling sent from the network side.

9. The method according to any one of claims 1-8, characterized in that, The second signaling includes at least one of the following: Duration; Activate the indication information for the preset associated time period; The offset time at which the preset associated time period begins to take effect; Identification information for one or more candidate cells; Identification information for one or more candidate beams.

10. The method according to any one of claims 1-9, characterized in that, The first signaling includes at least one of the following: Indication information indicating whether candidate cells and / or candidate beams can perform RACH-less access; Identification information for one or more candidate cells; Identification information for one or more candidate beams.

11. The method according to any one of claims 1-10, characterized in that, The condition of satisfying the preset execution conditions is used to determine whether the candidate cell and / or candidate beam meet the execution conditions for cell change. The condition of satisfying at least one preset access condition is used to determine whether at least one condition for access via RACH-less mode is met.

12. A method for processing cell access, characterized in that, The method is applied to the first base station and includes: Sending indication information to the second base station, wherein the indication information is used to indicate at least one candidate cell and / or candidate beam of the second base station terminal equipment; and / or, The terminal device receives a notification message sent by a second base station, wherein the notification message is used to indicate whether the terminal device is supported to perform at least one candidate cell and / or candidate beam for random access (RACH-less).

13. The method as described in claim 12, characterized in that, The instruction information and / or the notification information includes at least one of the following: The identification information of the terminal device; One or more beam identification information; One or more candidate cell identifiers; At least one indication message indicating whether RACH-less access is performed; At least one indication of whether access is granted; Configuration information for at least one RACH-less access type; Identification information for one or more service cells.

14. The method as described in claim 12 or 13, characterized in that, After sending the indication information to the second base station, the method further includes: Receive an acknowledgment message sent by the second base station; the acknowledgment message includes at least one of the following: One or more confirmation messages indicating whether to confirm or reject the instruction; Identification information of one or more terminal devices; One or more beam identification information; One or more candidate cell identifiers; At least one indication message indicating whether the RACH-less access is executed; Configuration information for at least one RACH-less access type; One or more service cell identifiers.

15. The method as described in any one of claims 12-14, wherein before receiving the notification message sent by the second base station, a request signaling is sent to the second base station to request the candidate cell to support and / or not support the terminal performing RACH-less access, wherein the request signaling includes at least one of the following: One or more UE identifiers; One or more serving cell identifiers; One or more beam identification information; One or more candidate cell identifiers; Instructions on whether to implement RACH-less access; Configuration information for at least one RACH-less access type.

16. A cell access processing method, characterized in that, The method is applied to a second base station and includes: The system receives indication information sent by a first base station, wherein the indication information is used to indicate at least one candidate cell and / or candidate beam for the second base station terminal equipment; and / or, A notification message is sent to the first base station, wherein the notification message is used to indicate whether the terminal device supports at least one candidate cell and / or candidate beam for performing RACH-less access.

17. The method as described in claim 16, characterized in that, The instruction information and / or the notification message includes at least one of the following: The identification information of the terminal device; One or more beam identification information; One or more candidate cell identifiers; At least one indication message indicating whether the RACH-less access is executed; At least one indication of whether access is granted; Configuration information for at least one RACH-less access type; Identification information for one or more service cells.

18. The method as described in claim 16 or 17, characterized in that, After receiving the indication information sent by the first base station, the method further includes: Send an acknowledgment message to the first base station, wherein the acknowledgment message includes at least one of the following: One or more confirmation messages indicating whether to confirm or reject the instruction; Identification information of one or more terminal devices; One or more beam identification information; One or more candidate cell identifiers; At least one indication message indicating whether the RACH-less access is executed; At least one indication of whether access is granted; Configuration information for at least one RACH-less access type; One or more service cell identifiers.

19. The method as described in any one of claims 16-18, wherein before sending a notification message to the first base station, a request signaling is received from the first base station requesting that the candidate cell support and / or not support the terminal performing RACH-less access, wherein the request signaling includes at least one of the following: One or more UE identifiers; One or more serving cell identifiers; One or more beam identification information; One or more candidate cell identifiers; Instructions on whether to implement RACH-less access; Configuration information for at least one RACH-less access type.

20. A terminal device, characterized in that, The terminal device includes: a memory, a transceiver, and a processor. A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations: The target cell and / or target beam are determined from the candidate cells and / or candidate beams that meet the preset execution conditions; If it is determined that the target cell and / or the target beam meet the preset access conditions, then access to the target cell and / or the target beam is triggered in a RACH-less manner.

21. The terminal device as described in claim 20, characterized in that, Determining that the target cell and / or the target beam meet preset access conditions includes at least one of the following: It is determined that the terminal device has acquired the effective timing advance (TA) value of the target cell and / or the target beam; It is determined that the terminal device has acquired the uplink pre-configured resources associated with the target cell and / or the target beam; Determine the Transmission Configuration Indication (TCI) state in which the terminal device activates the target cell and / or the target beam; The auxiliary information reported by the terminal device to the network side indicates that the candidate target cell or candidate target beam includes the target cell and / or the target beam; It is determined that the auxiliary information reported by the terminal device to the network side includes the Activation Transmission Configuration Indication (TCI) for the target cell and / or the target beam; The network side instructs the terminal device to access the target cell or the target beam in the RACH-less manner. The time when the terminal device performs access to the target cell and / or the target beam is determined to be within a preset associated time period of the target cell and / or the target beam; It is determined that the target cell and / or the target beam support access via dynamic scheduling. The terminal is determined to be within the specified location area; It is determined that the terminal has performed and / or been instructed to perform CSI measurements and / or report on the target beam or target cell; It is determined that the terminal is serving the specified service.

22. The terminal device as described in claim 20 or 21, characterized in that, When there are multiple candidate cells and / or candidate beams that meet the preset execution conditions. The step of determining the target cell and / or target beam from candidate cells and / or candidate beams that meet preset execution conditions includes: Based on preset selection criteria, a target cell and / or target beam are determined from multiple candidate cells and / or candidate beams that meet the preset execution criteria, wherein, The step of determining the target cell and / or target beam from multiple candidate cells and / or candidate beams that meet preset selection conditions includes at least one of the following: From a plurality of candidate cells and / or candidate beams that meet preset execution conditions, the terminal device selects candidate cells and / or candidate beams as target cells and / or target beams based on the implementation. From multiple candidate cells and / or candidate beams that meet the preset execution conditions, select the candidate cell and / or candidate beam with the best link quality at the current time as the target cell and / or target beam; From a plurality of candidate cells and / or candidate beams that meet preset execution conditions, at least one candidate target cell and / or candidate target beam contained in the auxiliary information reported by the terminal device to the network side is selected, and the candidate target cell and / or candidate target beam with the best link quality corresponding to the time when the auxiliary information is reported is selected as the target cell and / or target beam. From multiple candidate cells and / or candidate beams that meet the preset execution conditions, select the candidate cell and / or candidate beam that arrives first with the pre-configured uplink resources as the target cell or target beam. From multiple candidate beams that meet preset execution conditions, determine the cells corresponding to each of the multiple candidate beams, and select the cell with the most candidate beams as the target cell based on the number of candidate beams contained in each cell. From multiple candidate beams that meet preset execution conditions, select multiple candidate target beams contained in the auxiliary information reported by the terminal device to the network side, determine the cells corresponding to the multiple candidate target beams respectively, and select the cell containing the most candidate target beams as the target cell based on the number of candidate target beams contained in each cell. From a plurality of candidate cells and / or candidate beams that meet preset execution conditions, the candidate target cell and / or candidate target beam contained in the auxiliary information reported by the terminal device to the network side is selected as the target cell and / or target beam. From multiple candidate cells and / or candidate beams that meet the preset execution conditions, select the candidate cell and / or candidate beam on the candidate cell that has completed the candidate configuration information preprocessing as the target cell and / or target beam; From a plurality of candidate cells and / or candidate beams that meet preset execution conditions, select the candidate cell and / or candidate beam that the network side indicates to execute the RACH-less access method as the target cell and / or target beam; From multiple candidate cells and / or candidate beams that meet preset execution conditions, select the candidate cell and / or candidate beam that matches the current time as the target cell or target beam according to the preset associated time period of the candidate cell and / or the candidate beam; From multiple candidate cells and / or candidate beams that meet the preset execution conditions, select the candidate cells and / or candidate beams that have completed Transmission Configuration Indication (TCI) activation and / or Channel State Indication (CSI) measurement and / or CSI measurement reporting as the target cell and / or target beam. From multiple candidate cells and / or candidate beams that meet the preset execution conditions, select the candidate cell and / or candidate beam that indicates the execution of the Channel State Indication (CSI) measurement reporting as the target cell and / or target beam.

23. The terminal device as described in any one of claims 20-22, characterized in that, The reporting trigger time for auxiliary information reported by the terminal device to the network side includes: Before the terminal device performs access to the target cell and / or the target beam, it reports auxiliary information to the network side; or... The terminal device, upon determining the target cell and / or the target beam, reports auxiliary information to the network side; or... According to the period configured on the network side, auxiliary information is periodically reported to the network side; or, Auxiliary information is reported to the network side based on preset reporting trigger conditions; or, Auxiliary information is reported to the network side based on the request message sent by the network side.

24. The terminal device as described in any one of claims 20-23, characterized in that, The auxiliary information reported by the terminal device to the network side includes at least one of the following: Identification information for at least one or more candidate cells and / or candidate beams; TCI information for at least one or more candidate cells and / or candidate beams that has been activated or may be activated; Information indicating whether one or more candidate cells and / or candidate beams are candidate target cells or candidate target beams; One or more channel quality-related measurements of at least one or more candidate cells and / or candidate beams.

25. The terminal device as described in any one of claims 20-24, characterized in that, The determination of the network side instructing the terminal device to access the target cell and / or the target beam in the RACH-less manner includes: Upon receiving the RACH-less access configuration information from the network side via a pre-configured message, determine whether the target cell and / or the target beam can be accessed via RACH-less; or... The receiving network side indicates via the first signaling whether RACH-less access can be performed on the candidate cell and / or candidate beam.

26. A first base station, characterized in that, Includes memory, transceiver, and processor: A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations: Sending indication information to the second base station, wherein the indication information is used to indicate at least one candidate cell and / or candidate beam of the second base station terminal equipment; and / or, The terminal device receives a notification message sent by a second base station, wherein the notification message is used to indicate whether the terminal device supports at least one candidate cell and / or candidate beam for performing RACH-less access.

27. The first base station as described in claim 26, characterized in that, The instruction information and / or the notification message includes at least one of the following: The identification information of the terminal device; One or more beam identification information; One or more candidate cell identifiers; At least one indication message indicating whether the RACH-less access is executed; At least one indication of whether access is granted; Configuration information for at least one RACH-less access type; Identification information for one or more service cells.

28. The first base station as described in claim 26 or 27, characterized in that, The processor is further configured to: after sending the indication information to the second base station Receive the confirmation message sent by the second base station; The confirmation message contains at least one of the following: One or more confirmation messages indicating whether to confirm or reject the instruction; Identification information of one or more terminal devices; One or more beam identification information; One or more candidate cell identifiers; At least one indication message indicating whether the RACH-less access is executed; Configuration information for at least one RACH-less access type; One or more service cell identifiers.

29. The first base station as described in any one of claims 26-28, characterized in that, The processor is also used for: Send a request signaling message to the second base station, requesting the candidate cell to support and / or not support the terminal performing RACH-less access, wherein the request signaling message includes at least one of the following: One or more UE identifiers; One or more serving cell identifiers; One or more beam identification information; One or more candidate cell identifiers; Instructions on whether to implement RACH-less access; Configuration information for at least one RACH-less access type.

30. A second base station, characterized in that, The second base station includes a memory, a transceiver, and a processor. Memory, used to store computer programs; Transceiver, used to send and receive data under the control of the processor; Processor, configured to read the computer program in the memory and perform the following operations: The system receives indication information sent by a first base station, wherein the indication information is used to indicate at least one candidate cell and / or candidate beam for the second base station terminal equipment; and / or, A notification message is sent to the first base station, wherein the notification message is used to indicate whether the terminal device supports at least one candidate cell and / or candidate beam for performing RACH-less access.

31. The apparatus as claimed in claim 30, characterized in that, The instruction information and / or the notification message includes at least one of the following: The identification information of the terminal device; One or more beam identification information; One or more candidate cell identifiers; At least one indication message indicating whether the RACH-less access is executed; At least one indication of whether access is granted; Configuration information for at least one RACH-less access type; Identification information for one or more service cells.

32. A cell access processing device, characterized in that, The device is applied to a terminal equipment and includes: The determination module is used to determine the target cell and / or target beam from candidate cells and / or candidate beams that meet preset execution conditions; The access processing module is configured to, if it is determined that the target cell and / or the target beam meet preset access conditions, trigger access to the target cell and / or the target beam in a RACH-less manner.

33. A cell access processing device, characterized in that, The device is applied to the first base station and includes: A first transmitting module is configured to transmit indication information to a second base station, wherein the indication information is used to indicate at least one candidate cell and / or candidate beam of the second base station terminal equipment; and / or, The first receiving module is configured to receive a notification message sent by the second base station, wherein the notification message is used to indicate whether the terminal device supports at least one candidate cell and / or candidate beam for performing RACH-less access.

34. A cell access processing device, characterized in that, The device is applied to a second base station and includes: The second receiving module is configured to receive indication information transmitted by the first base station, wherein the indication information is used to indicate at least one candidate cell and / or candidate beam of the second base station terminal device; and / or, The second sending module is used to send a notification message to the first base station, wherein the notification message is used to indicate whether the terminal device supports at least one candidate cell and / or candidate beam for performing RACH-less access.

35. A processor-readable storage medium, characterized in that, The processor-readable storage medium stores a program for causing the processor to execute the cell access processing method according to any one of claims 1-19.

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