Cell handover method, user equipment (UE), network device, and communication system

Abstract

A cell handover method, a user equipment (UE), a network device, and a communication system. The cell handover method is applied to a UE, and comprises: receiving first signaling information sent by a network device, the first signaling information being used for triggering the UE to hand over to a target cell, wherein the first signaling information comprises a first beam resource indicated by the network device; and initiating a random access procedure to the target cell on the basis of the first beam resource in the first signaling information. Thus, the time overhead caused by a random access channel (RACH) in dynamic cell mobility management (L1 / L2 based inter-cell mobility, LTM) is reduced, and the cell handover procedure is accelerated.

Description

Cell switching method, user equipment UE, network equipment and communication system Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a cell switching method, user equipment (UE), network equipment, and a communication system. Background Art

[0002] In a cell handover scenario in a mobile communication system, a user equipment (UE) needs to initiate a random access procedure to a target cell. During this process, the UE needs to select an appropriate beam and perform beam measurements on the target cell. Therefore, a method is needed to determine the beam used during the cell handover process and the random access channel (RO) resources corresponding to the determined beam.

[0003] Summary of the Invention

[0004] The embodiments of the present disclosure provide a cell switching method, a user equipment UE, a network device, and a communication system to provide a way to determine a beam in a cell switching process and an RO resource corresponding to the determined beam.

[0005] In one aspect, an embodiment of the present disclosure provides a cell handover method, applied to a user equipment (UE), the method including:

[0006] Receiving first signaling information sent by a network device, where the first signaling information is used to trigger the UE to switch to a target cell; wherein the first signaling information includes a first beam resource indicated by the network device;

[0007] A random access process is initiated to the target cell according to the first beam resource in the first signaling information.

[0008] On the other hand, an embodiment of the present disclosure further provides a cell handover method, applied to a network device, the method comprising:

[0009] Sending first signaling information to a user equipment UE, instructing the UE to initiate a random access process to the target cell according to a first beam resource in the first signaling information;

[0010] The first signaling information is used to trigger the UE to switch to the target cell.

[0011] On the other hand, an embodiment of the present disclosure further provides a user equipment UE, wherein the user equipment UE includes:

[0012] A receiving module, configured to receive first signaling information sent by a network device, where the first signaling information is used to trigger the UE to switch to a target cell; wherein the first signaling information includes a first beam resource indicated by the network device;

[0013] A switching module is used to initiate a random access process to the target cell according to the first beam resource in the first signaling information.

[0014] On the other hand, an embodiment of the present disclosure further provides a network device, the network device comprising:

[0015] A sending module, configured to send first signaling information to a user equipment UE, instructing the UE to initiate a random access process to the target cell according to the first beam resource in the first signaling information;

[0016] The first signaling information is sent to the user equipment UE, where the first signaling information is used to trigger the UE to switch to the target cell.

[0017] On the other hand, an embodiment of the present disclosure further provides a user equipment UE, including:

[0018] one or more processors;

[0019] The user equipment UE is used to execute the cell switching method described in the embodiment of the present disclosure.

[0020] On the other hand, an embodiment of the present disclosure further provides a network device, including:

[0021] one or more processors;

[0022] The network device is used to execute the cell switching method described in the embodiment of the present disclosure.

[0023] An embodiment of the present disclosure further provides a communication system, including a user equipment UE and a network device; wherein the user equipment UE is configured to implement the cell switching method described in the embodiment of the present disclosure, and the network device is configured to implement the cell switching method described in the embodiment of the present disclosure.

[0024] The embodiment of the present disclosure further provides a storage medium storing instructions. When the instructions are executed on a communication device, the communication device executes the cell switching method as described in the embodiment of the present disclosure.

[0025] In an embodiment of the present disclosure, a user equipment receives first signaling information sent by a network device, where the first signaling information is used to trigger the UE to switch to a target cell; wherein the first signaling information includes a first beam resource indicated by the network device; and a random access process is initiated to the target cell based on the first beam resource in the first signaling information. In this way, random access is directly initiated based on the first beam resource indicated in the first signaling information, thereby reducing the time overhead caused by RACH-based access in dynamic cell mobility management (L1 / L2 based inter-cell Mobility, LTM), and accelerating the cell switching process.

[0026] Additional aspects and advantages of the embodiments of the present disclosure will be given in part in the following description, which will become apparent from the following description or be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following drawings required for describing the embodiments are introduced. The following drawings are merely some embodiments of the present disclosure and do not impose specific limitations on the protection scope of the present disclosure.

[0028] FIG1 is an exemplary schematic diagram of the architecture of a communication system provided according to an embodiment of the present disclosure;

[0029] FIG2 is a schematic diagram of an example of a method provided by an embodiment of the present disclosure;

[0030] FIG3 is a second schematic diagram of an example of a method provided by an embodiment of the present disclosure;

[0031] FIG4 is a third schematic diagram of an example of a method provided by an embodiment of the present disclosure;

[0032] FIG5 is a schematic diagram of a flow chart of a cell switching method according to an embodiment of the present disclosure;

[0033] FIG6 is a second flow chart of a cell switching method according to an embodiment of the present disclosure;

[0034] FIG7 is a schematic diagram of the structure of a user equipment proposed in an embodiment of the present disclosure;

[0035] FIG8 is a schematic diagram of the structure of a network device proposed in an embodiment of the present disclosure;

[0036] FIG9 is a schematic diagram of the structure of a terminal proposed in an embodiment of the present disclosure;

[0037] FIG10 is a schematic diagram of the structure of a chip proposed in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0038] The embodiments of the present disclosure provide a cell switching method, a user equipment UE, a network device, and a communication system.

[0039] In a first aspect, an embodiment of the present disclosure provides a cell handover method, the method comprising:

[0040] Receiving first signaling information sent by a network device, where the first signaling information is used to trigger the UE to switch to a target cell; wherein the first signaling information includes a first beam resource indicated by the network device;

[0041] A random access process is initiated to the target cell according to the first beam resource in the first signaling information.

[0042] In the above embodiment, random access is directly initiated according to the first beam resource indicated in the first signaling information, thereby reducing the time overhead caused by accessing RACH in dynamic cell mobility management (L1 / L2 based inter-cell Mobility, LTM) and speeding up the cell switching process.

[0043] In combination with some embodiments of the first aspect, in some embodiments, the initiating a random access procedure to the target cell according to the first beam resource in the first signaling information includes at least one of the following:

[0044] Initiate random access to the target cell using the first beam resource at a first random access opportunity (RO) corresponding to the first beam resource;

[0045] Determine whether to use the first beam resource to initiate random access to the target cell according to the identification information in the first signaling information.

[0046] In the above embodiment, after acquiring the first beam resource indicated by the network device, the UE determines whether to use the first beam resource to initiate random access to the target cell.

[0047] In combination with some embodiments of the first aspect, in some embodiments, determining, according to the identification information in the first signaling information, whether to use the first beam resource to initiate random access to the target cell includes:

[0048] The identification information indicates that the first beam resource is used to initiate random access to the target cell, and the first beam resource is used to initiate random access to the target cell at a first RO corresponding to the first beam resource;

[0049] or

[0050] The identification information indicates that the first beam resource is not used to initiate random access to the target cell, and the UE reselects a second beam resource and initiates random access to the target cell in a second RO corresponding to the second beam resource.

[0051] In the above embodiment, the first signaling information carries identification information, indicating whether to use the first beam resource to initiate random access to the target cell.

[0052] In conjunction with some embodiments of the first aspect, in some embodiments, the identification field added to the first signaling information is used to carry the identification information;

[0053] or

[0054] The transmission configuration indication TCI field in the first signaling information.

[0055] In the above embodiment, the identification information can be a newly added field in the first signaling information, for example, adding an identification field to carry the identification information, and can also be carried in the transmission configuration indicator (TCI) field in the first signaling information, for example, occupying bits in the TCI field to carry the identification information.

[0056] In combination with some embodiments of the first aspect, in some embodiments, initiating a random access process to the target cell according to the first beam resource in the first signaling information includes at least one of the following:

[0057] Using the first beam resource, attempt to initiate random access to the target cell at a first random access opportunity (RO) corresponding to the first beam resource; if the random access fails, continue to attempt random access at the first random access opportunity (RO) corresponding to the first beam resource and continue to attempt no more than N-1 times (the total number of attempts is no more than N times), where N is a positive integer;

[0058] Performing an L1 measurement on the target cell, and if the L1 measurement result of the first beam resource is greater than a preset threshold, initiating random access to the target cell at a first random access opportunity (RO) corresponding to the first beam resource;

[0059] Use the first beam resource and attempt to initiate random access to the target cell at the first random access opportunity RO corresponding to the first beam resource; if the random access fails, continue to attempt random access at the first random access opportunity RO corresponding to the first beam resource and continue to attempt no more than N-1 times (the total number of attempts is no more than N times). If N consecutive random access attempts fail, re-perform L1 measurement on the target cell for beam selection, and if the L1 measurement result of the first beam resource is greater than the preset threshold, initiate random access to the target cell at the first random access opportunity RO corresponding to the first beam resource.

[0060] In the above embodiment, the first beam resource can be used first to attempt to initiate random access to the target cell at the first random access opportunity RO corresponding to the first beam resource; if one of the access attempts is successful, the identifier is successfully switched to the target cell, and no further access attempts are made. Conversely, if access is not successful, access attempts are continued, and the number of continued attempts does not exceed N-1 times (the total number of attempts is not more than N times); and when N consecutive attempts fail, L1 measurement is re-performed on the target cell for beam selection, and if the L1 measurement result of the first beam resource is greater than a preset threshold, the first beam resource is used to initiate random access to the target cell at the first random access opportunity RO corresponding to the first beam resource. When the result of the re-measurement of the target cell is obtained, if it is determined that the L1 measurement result of the first beam resource is greater than the preset threshold, random access can be directly initiated using the first beam resource and the corresponding RO, eliminating the process of beam selection based on the L1 measurement result.

[0061] In combination with some embodiments of the first aspect, in some embodiments, the using the first beam resource, attempting to initiate random access to the target cell at a first random access opportunity RO corresponding to the first beam resource, includes:

[0062] If the access is successful during the random access attempt, no random access is initiated to the target cell.

[0063] In the above embodiment, during the process of initiating random access to the target cell, if one of the access attempts is successful, the cell is successfully handed over to the target cell, and no further random access attempts are made.

[0064] In conjunction with some embodiments of the first aspect, in some embodiments, performing L1 measurement on the target cell includes:

[0065] If the L1 measurement result of the first beam resource is less than or equal to the preset threshold, a third beam resource is selected, and random access is initiated to the target cell at a third RO corresponding to the third beam resource.

[0066] In the above embodiment, if the L1 measurement result of the first beam resource is less than or equal to the preset threshold, the UE selects the third beam resource and initiates random access to the target cell at the third RO corresponding to the third beam resource to quickly complete the cell switching process.

[0067] In a second aspect, an embodiment of the present disclosure provides a cell handover method, the method comprising:

[0068] Sending first signaling information to a user equipment UE, instructing the UE to initiate a random access process to the target cell according to a first beam resource in the first signaling information;

[0069] The first signaling information is used to trigger the UE to switch to the target cell.

[0070] In combination with some embodiments of the second aspect, in some embodiments, the first signaling information includes identification information, and the identification information indicates whether the UE uses the first beam resources to initiate random access to the target cell.

[0071] In conjunction with some embodiments of the second aspect, in some embodiments, the identification information includes:

[0072] An identification field added to the first signaling information, the identification field being used to carry the identification information;

[0073] or

[0074] The transmission configuration indication TCI field in the first signaling information.

[0075] In a third aspect, an embodiment of the present disclosure further provides a user equipment UE, which includes at least one of a receiving module and a switching module; wherein the user equipment UE is used to execute an optional implementation method of the first aspect.

[0076] In a fourth aspect, an embodiment of the present disclosure further provides a network device, comprising: a sending module; wherein the above-mentioned network device is used to execute the optional implementation method of the second aspect.

[0077] In a fifth aspect, an embodiment of the present disclosure further provides a user equipment UE, including:

[0078] one or more processors;

[0079] The user equipment UE is used to execute the optional implementation of the first aspect.

[0080] In a sixth aspect, an embodiment of the present disclosure further provides a network device, including:

[0081] one or more processors;

[0082] The network device is used to execute the optional implementation of the second aspect.

[0083] In the seventh aspect, an embodiment of the present disclosure further provides a communication system, including a user equipment UE and a network device; wherein the user equipment UE is configured to perform the optional implementation method as described in the first aspect, and the network device is configured to perform the optional implementation method as described in the second aspect.

[0084] In an eighth aspect, an embodiment of the present disclosure further provides a storage medium storing instructions, which, when executed on a communication device, enables the communication device to execute the optional implementation methods described in the first and second aspects.

[0085] In a ninth aspect, an embodiment of the present disclosure proposes a program product. When the program product is executed by a communication device, the communication device executes the method described in the optional implementation of the first and second aspects.

[0086] In a tenth aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the method described in the optional implementation of the first and second aspects.

[0087] In an eleventh aspect, an embodiment of the present disclosure provides a chip or a chip system, wherein the chip or chip system includes a processing circuit configured to execute the method described in the optional implementation of the first and second aspects above.

[0088] It is understandable that the above-mentioned user equipment UE, network equipment, communication system, storage medium, program product, computer program, chip or chip system are all used to perform the method proposed in the embodiment of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding method and will not be repeated here.

[0089] The present disclosure provides a cell handover method, a user equipment (UE), a network device, and a communication system. In some embodiments, the cell handover method, random access method, cell reselection method, and other terms are interchangeable, and the information processing system, communication system, and other terms are interchangeable.

[0090] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0091] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0092] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0093] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0094] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0095] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0096] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The above is also applicable when there are more branches such as A, B, C, etc.

[0097] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for example, if the description object is "information", then the "first signaling information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0098] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0099] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0100] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not less than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "not more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0101] In some embodiments, devices and equipment can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. In some cases, they can also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject", etc.

[0102] In some embodiments, "network" can be interpreted as devices included in the network, such as access network equipment, core network equipment, etc.

[0103] In some embodiments, "access network device (AN device)" may also be referred to as "radio access network device (RAN device)", "base station (BS)", "radio base station", "fixed station", and in some embodiments may also be understood as "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission and / or reception point (TRP)" "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)", etc.

[0104] In some embodiments, "terminal" or "terminal device" may be referred to as "user equipment (UE)", "user terminal" "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, etc.

[0105] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0106] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0107] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0108] FIG1 is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

[0109] As shown in FIG1 , a communication system 100 includes user equipment (UE) 101 and network equipment 102 .

[0110] In some embodiments, UE101 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited thereto.

[0111] In some embodiments, the network device 102 may include at least one of an access network device and a core network device.

[0112] In some embodiments, a core network device may be a device including one or more network elements, or may be multiple devices or device groups, each including all or part of the one or more network elements. The network element may be virtual or physical. The core network may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0113] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

[0114] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1 , or a portion thereof, but are not limited thereto. The entities shown in FIG1 are illustrative only. The communication system may include all or part of the entities shown in FIG1 , or may include other entities outside of FIG1 . The number and form of the entities are arbitrary, and the entities may be physical or virtual. The connection relationships between the entities are illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0115] The embodiments of the present disclosure can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new radio access technology (RAT), new radio (NR), new radio access (NX), future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X) systems, systems utilizing other resource determination methods, and next-generation systems based on and extending these systems. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0116] Figures 2 to 4 are interactive schematic diagrams of a cell handover method according to an embodiment of the present disclosure. As shown in Figure 2, the method includes:

[0117] Step 201: User equipment UE101 performs pre-configuration and downlink synchronization procedures.

[0118] In order to communicate with a network device, a user equipment needs to establish a wireless connection with a cell controlled by the network device so as to reside in the cell controlled by the network device. The cell with which the user equipment has established a wireless connection is called the serving cell of the user equipment.

[0119] In mobile communication systems, due to changes in user equipment mobility and / or cell channel conditions, a user equipment may switch serving cells. The serving cell where the user equipment originally resides is generally referred to as the source cell, and the cell where the user equipment newly resides is generally referred to as the target cell. This means that the user equipment switches from the source cell to the target cell. The process of switching a user equipment from a source cell to a target cell is called a cell handover.

[0120] UE 101 determines candidate cells to which UE 101 can switch based on pre-configured information obtained; the pre-configured information may include, for example, identification information and measurement reference signals for each candidate cell. After determining the candidate cell, a downlink synchronization process may be performed. It is understood that the downlink synchronization process may also be performed before determining the candidate cell, and this is not limited in the present embodiment.

[0121] In step 202 , UE 101 performs L1 measurement and sends an L1 measurement report to the network device 102 .

[0122] L1 measurement is a physical layer (L1) measurement, also known as beam measurement. The user performs L1 measurements on each candidate cell, including the serving cell, based on preconfigured measurement reference information. The user then reports the measurement results to the serving cell to determine whether a handover is necessary and to which cell the user has been handed over.

[0123] Step 203 , the network device 102 decides whether to perform a cell handover network based on the L1 measurement report.

[0124] The network device 102 determines whether to initiate a handover process for the UE 101 to the candidate cell (target cell) based on the L1 measurement report.

[0125] In step 204, the network device 102 sends first signaling information to the UE 101, where the first signaling information is used to trigger the UE to switch to the target cell; wherein the first signaling information includes a first beam resource indicated by the network device.

[0126] The first signaling information is, for example, a cell switch command.

[0127] The network device 102 can send a first signaling message to the UE 101 in the serving cell (i.e., the source cell). The first signaling message is used to trigger the UE to switch to the target cell, and the first signaling message carries the first beam resource indicated by the network device. The first beam resource can be used by the UE 101 to initiate random access to the target cell.

[0128] Optionally, in the embodiment of the present disclosure, the first information may further include cell identification information of the target cell; and the first information does not include the timing advance (TA) of the target cell.

[0129] Step 205 : UE 101 receives the first signaling information sent by the network device 102 .

[0130] Step 206: UE 101 initiates a random access process to the target cell according to the first beam resource in the first signaling information.

[0131] Among them, after obtaining the first beam resource indicated by the network device 102, UE101 determines whether to use the first beam resource to initiate random access to the target cell; if used, it directly uses a beam resource to initiate a random access process to the target cell; if the first beam resource is not used, or the L1 measurement result of the first beam resource does not meet the requirements, the beam resource is reselected.

[0132] In some embodiments, as shown in FIG3 , step 206 includes methods 1 to 3.

[0133] Specifically, in step 301, UE 101 receives first signaling information sent by network device 102, and then can perform one of steps 302 to 304.

[0134] Method 1 (step 302) uses the first beam resource to attempt to initiate random access to the target cell at the first random access opportunity RO corresponding to the first beam resource; if the random access fails, continue to attempt random access at the first random access opportunity RO corresponding to the first beam resource, and continue to attempt no more than N-1 times (the total number of attempts is no more than N times), where N is a positive integer, such as N=3, which means that after the first attempt at random access to the first beam resource fails, at most 2 random access attempts can be made for the first beam resource, for a total of 3 random access attempts.

[0135] If N consecutive attempts fail, the user equipment can re-perform L1 measurement on the target cell to select an appropriate transmission beam. Conversely, if the first random access opportunity corresponding to the first beam resource is successfully accessed, or the first random access opportunity corresponding to the first beam resource fails, but the subsequent random access attempts in the first or second random access attempts after the first random access failure are successful (a total of three random access attempts), then the subsequent random access attempts are stopped and there is no need to perform L1 measurement on the target cell.

[0136] When UE101 determines the first beam resource indicated in the first signaling information, it can be specified that when the first N attempts are made to initiate random access to the target cell, the first beam resource and the RO resource corresponding to the first beam resource are used. After the first N attempts fail, the user equipment can re-perform L1 measurement on the target cell to select a suitable transmission beam to initiate random access.

[0137] For example, during the process of initiating random access to the target cell, if one of the access attempts is successful, the user equipment is successfully handed over to the target cell and no further random access attempts are made. Conversely, if the access is unsuccessful, random access attempts are continued, and at least the first N-1 random access attempts are made using the first beam resource. If N consecutive attempts fail, the user equipment can re-perform L1 measurement on the target cell to select an appropriate transmission beam.

[0138] In this way, during the first N random access attempts (when access was unsuccessful each time before the current attempt), the first beam resource indicated in the first signaling information is used preferentially for random access, and after receiving the first signaling information, L1 measurement of the target cell is avoided to select a suitable beam again, thereby reducing the time overhead caused by re-L1 measurement and speeding up the cell switching process.

[0139] In some embodiments, in the first approach, the using the first beam resource to attempt to initiate random access to the target cell at a first random access opportunity RO corresponding to the first beam resource includes:

[0140] If the access is successful, no random access is initiated to the target cell.

[0141] In the above embodiment, during the process of initiating random access to the target cell, if one of the access attempts is successful, the target cell is successfully handed over and no further random access attempts are made. In addition, there is no need to perform L1 measurement on the target cell.

[0142] In the second method (step 303), L1 measurement is performed on the target cell to select a beam to initiate random access to the target cell. In the selection process, the indicated beam is given priority. Specifically, in the selection process, if the L1 measurement result of the first beam resource is greater than a preset threshold, the first beam resource and its corresponding random access opportunity RO are used to initiate random access to the target cell.

[0143] After receiving the first signaling information, the first beam resource indicated by the first signaling information is specified to have a higher priority. The user equipment can re-perform L1 measurement on the target cell and reselect the beam and RO based on the measurement result. However, as long as the L1 measurement result of the first beam resource is greater than a preset threshold (the preset threshold can be configured or indicated by the network device), the first beam resource and the corresponding RO are preferentially used to initiate random access. It is not necessary to perform L1 measurement on all beam resources in the target cell.

[0144] In this way, when the result of re-measurement of the target cell by L1 is obtained, if it is determined that the L1 measurement result of the first beam resource is greater than the preset threshold, random access can be directly initiated for the first beam resource and the corresponding RO, eliminating the process of beam selection based on the L1 measurement result, reducing the time overhead caused by beam selection, and speeding up the cell switching process.

[0145] In some embodiments, in the second approach, performing L1 measurement on the target cell includes:

[0146] If the L1 measurement result of the first beam resource is less than or equal to the preset threshold, a third beam resource is selected, and random access is initiated to the target cell at a third RO corresponding to the third beam resource.

[0147] In the above embodiment, if the L1 measurement result of the first beam resource is less than or equal to the preset threshold, the UE selects the third beam resource, and initiates random access to the target cell on the third RO corresponding to the third beam resource to quickly complete the cell switching process. The third beam resource can be pre-configured by the network side, for example, as an alternative with a lower priority than the first beam resource, or the third beam resource can be determined by the terminal itself, for example, through L1 measurement and using the beam resource that meets the measurement result as the third beam resource. In addition, the terminal can directly attempt to initiate random access to the target cell on the third beam resource using the third RO corresponding to the third beam resource, or the terminal can also regard the third beam resource as a new first beam resource and repeat the method used in method one to determine the beam resource for random access and its corresponding RO. Therefore, when the first beam resource is not suitable for initiating random access, the terminal device can redetermine the beam resource for random access without performing L1 measurement on all beam resources.

[0148] Method three (step 304): Use the first beam resource to attempt to initiate random access to the target cell at the first random access opportunity RO corresponding to the first beam resource; if random access fails, continue to attempt random access at the first random access opportunity RO corresponding to the first beam resource, and the number of attempts shall not exceed N-1 times (the total number of attempts shall not exceed N times), where N is a positive integer, such as N=3; if N consecutive attempts fail, determine the beam resource by performing L1 measurement on the target cell. At this time, L1 measurement can be performed on the first beam resource first. If the L1 measurement result of the first beam resource is greater than a preset threshold, random access is initiated to the target cell at the first random access opportunity RO corresponding to the first beam resource.

[0149] Specifically, in phase 1, the first beam resource is first used to initiate random access to the target cell at the first random access opportunity (RO) corresponding to the first beam resource. If one of the access attempts is successful, the target cell is successfully switched to, and no further access attempts are made. Conversely, if access is unsuccessful, access attempts are continued, and at least the first N attempts are made using the first beam resource.

[0150] If the terminal fails after N consecutive attempts, the terminal adopts the operation of stage 2: the terminal re-performs L1 measurement on the target cell. The terminal can perform L1 measurement on the target cell to determine a beam resource suitable for random access. For example, when the terminal performs L1 measurement, the first beam has a higher priority. If the L1 measurement result of the first beam resource is greater than a preset threshold, random access is initiated to the target cell at the first random access opportunity RO corresponding to the first beam resource. Conversely, if the L1 measurement result of the first beam resource is less than the preset threshold, the terminal no longer considers using the first beam resource to initiate random access, but uses other beam resources to initiate random access.

[0151] In some embodiments, as shown in FIG4 , after UE 101 receives the first signaling information sent by the network device 102, it may also perform steps 402 to 404.

[0152] In step 401, UE 101 receives first signaling information sent by network device 102, and then step 402 or step 403 may be executed.

[0153] Step 402: Use the first beam resource to initiate random access to the target cell at a first random access opportunity RO corresponding to the first beam resource.

[0154] Among them, after obtaining the first beam resource indicated by the network device 102, UE101 determines whether to use the first beam resource to initiate random access to the target cell; if used, it can be executed with reference to the above-mentioned methods one to three, which will not be repeated here.

[0155] Step 403: Determine whether to use the first beam resource to initiate random access to the target cell based on the identification information in the first signaling information; if so, execute step 402; otherwise, execute step 404.

[0156] The first signaling information carries identification information indicating whether to use the first beam resource to initiate random access to the target cell. For example, if the identification information is set to "1", it indicates that the first beam resource is used; if the identification information is set to "0", it indicates that the first beam resource is not used.

[0157] In some embodiments, the identification information includes:

[0158] An identification field added to the first signaling information, the identification field being used to carry the identification information;

[0159] or

[0160] The transmission configuration indication TCI field in the first signaling information.

[0161] Among them, the identification information can be a newly added field in the first signaling information, for example, adding an identification field to carry the identification information, and can also be carried in the transmission configuration indication (TCI) field in the first signaling information, for example, through a specific value of the TCI field to indicate that random access is not performed using the beam indicated by the TCI.

[0162] Step 404: The identification information indicates not to use the first beam resource to initiate random access to the target cell. The UE reselects a second beam resource and initiates random access to the target cell at a second RO corresponding to the second beam resource.

[0163] If the identification information indicates not to use the first beam resource to initiate random access to the target cell, then other second beam resources are reselected to initiate random access to the target cell.

[0164] In an embodiment of the present disclosure, a user equipment receives first signaling information sent by a network device, where the first signaling information is used to trigger the UE to switch to a target cell; wherein the first signaling information includes a first beam resource indicated by the network device; and a random access process is initiated to the target cell based on the first beam resource in the first signaling information. In this way, random access is directly initiated based on the first beam resource indicated in the first signaling information, thereby reducing the time overhead caused by RACH-based access in dynamic cell mobility management (L1 / L2 based inter-cell Mobility, LTM), and accelerating the cell switching process.

[0165] In some embodiments, the names of information, etc. are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0166] In some embodiments, terms such as "moment", "time point", "time", and "time position" can be replaced with each other, and terms such as "duration", "period", "time window", "window", and "time" can be replaced with each other.

[0167] In some embodiments, terms such as wireless access scheme and waveform may be used interchangeably.

[0168] In some embodiments, terms such as "certain", "preset", "preset", "setting", "indicated", "a certain", "any", and "first" can be interchangeable. "Specific A", "preset A", "preset A", "setting A", "indicated A", "a certain A", "any A", and "first A" can be interpreted as A pre-specified in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., or as specific A, a certain A, any A, or first A, etc., but not limited to this.

[0169] In some embodiments, the determination or judgment can be performed by a value represented by 1 bit (0 or 1), or by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a predetermined value), but is not limited thereto.

[0170] In some embodiments, "not expecting to receive" can be interpreted as not receiving on time domain resources and / or frequency domain resources, or as not performing subsequent processing on the data after receiving it; "not expecting to send" can be interpreted as not sending, or as sending but not expecting the recipient to respond to the content sent.

[0171] The cell handover method involved in the embodiments of the present disclosure may include at least one of the aforementioned steps and embodiments. For example, step 203 may be implemented as an independent embodiment, step 204 may be implemented as an independent embodiment, step 205 may be implemented as an independent embodiment, and step 206 may be implemented as an independent embodiment; the combination of steps 201, 202, and 203 may be implemented as an independent embodiment, the combination of steps 204, 205, and 206 may be implemented as an independent embodiment, and the combination of steps 205 and 206 may be implemented as an independent embodiment, but is not limited thereto.

[0172] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 2 .

[0173] FIG5 is a flowchart of a cell switching method according to an embodiment of the present disclosure.

[0174] As shown in FIG5 , the above method may be applied to user equipment UE101, and the above method includes:

[0175] Step 501: Receive first signaling information sent by a network device, where the first signaling information is used to trigger the UE to switch to a target cell; wherein the first signaling information includes a first beam resource indicated by the network device;

[0176] Step 502: Initiate a random access process to the target cell according to the first beam resource in the first signaling information.

[0177] Optionally, in the embodiment of the present disclosure, initiating a random access process to the target cell according to the first beam resource in the first signaling information includes:

[0178] Step 503: Use the first beam resource to initiate random access to the target cell at a first random access opportunity RO corresponding to the first beam resource;

[0179] or

[0180] Step 504: Determine whether to use the first beam resource to initiate random access to the target cell based on the identification information in the first signaling information.

[0181] Optionally, in the embodiment of the present disclosure, determining, according to the identification information in the first signaling information, whether to use the first beam resource to initiate random access to the target cell includes:

[0182] Step 505: The identification information indicates that random access is initiated to the target cell using the first beam resource, and random access is initiated to the target cell using the first beam resource at the first RO corresponding to the first beam resource.

[0183] or

[0184] Step 506: The identification information indicates not to use the first beam resource to initiate random access to the target cell. The UE reselects a second beam resource and initiates random access to the target cell at a second RO corresponding to the second beam resource.

[0185] Optionally, in the embodiment of the present disclosure, the identification field added to the first signaling information is used to carry the identification information;

[0186] or

[0187] The transmission configuration indication TCI field in the first signaling information.

[0188] Optionally, in the embodiment of the present disclosure, initiating a random access process to the target cell according to the first beam resource in the first signaling information includes at least one of the following:

[0189] Step 507: Using the first beam resource, attempt to initiate random access to the target cell at a first random access opportunity (RO) corresponding to the first beam resource; if the random access fails, continue to attempt random access at the first random access opportunity (RO) corresponding to the first beam resource for no more than N-1 times, where N is a positive integer;

[0190] Step 508: Re-perform L1 measurement on the target cell to select a beam, and if the L1 measurement result of the first beam resource is greater than a preset threshold, use the first beam resource to initiate random access to the target cell at a first random access opportunity (RO) corresponding to the first beam resource;

[0191] Step 509: Use the first beam resource to attempt to initiate random access to the target cell at the first random access opportunity RO corresponding to the first beam resource; if the random access fails, continue to attempt random access at the first random access opportunity RO corresponding to the first beam resource and try no more than N-1 times, where N is a positive integer; and if N-1 consecutive attempts fail, re-perform L1 measurement on the target cell for beam selection, and if the L1 measurement result of the first beam resource is greater than a preset threshold, use the first beam resource to initiate random access to the target cell at the first random access opportunity RO corresponding to the first beam resource.

[0192] Optionally, in the embodiment of the present disclosure, step 507 includes:

[0193] If the access is successful during the random access attempt, no random access is initiated to the target cell.

[0194] Optionally, in the embodiment of the present disclosure, step 508 includes:

[0195] If the L1 measurement result of the first beam resource is less than or equal to the preset threshold, a third beam resource is selected, and random access is initiated to the target cell at a third RO corresponding to the third beam resource.

[0196] The cell handover method involved in the embodiments of the present disclosure may include at least one of the aforementioned steps and embodiments. For example, step 501 can be implemented as an independent embodiment, step 502 can be implemented as an independent embodiment, step 503 can be implemented as an independent embodiment, step 504 can be implemented as an independent embodiment, step 505 can be implemented as an independent embodiment, step 506 can be implemented as an independent embodiment, step 507 can be implemented as an independent embodiment, step 508 can be implemented as an independent embodiment, and step 509 can be implemented as an independent embodiment; the combination of step 501 and step 507 can be implemented as an independent embodiment, the combination of step 501 and step 508 can be implemented as an independent embodiment, and the combination of step 501 and step 509 can be implemented as an independent embodiment, but is not limited thereto.

[0197] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 5 .

[0198] FIG6 is a second flowchart of a cell switching method according to an embodiment of the present disclosure.

[0199] As shown in FIG6 , the method is applied to a network device, and the method includes:

[0200] Step 601: Send first signaling information to a user equipment (UE), instructing the UE to initiate a random access process to the target cell according to a first beam resource in the first signaling information;

[0201] The first signaling information is used to trigger the UE to switch to the target cell.

[0202] Optionally, in an embodiment of the present disclosure, the first signaling information includes identification information, and the identification information indicates whether the UE uses the first beam resources to initiate random access to the target cell.

[0203] Optionally, in an embodiment of the present disclosure, the identification information includes:

[0204] An identification field added to the first signaling information, the identification field being used to carry the identification information;

[0205] or

[0206] The transmission configuration indication TCI field in the first signaling information.

[0207] The embodiments of the present disclosure further provide an apparatus for implementing any of the above methods. For example, an apparatus is provided, comprising units or modules for implementing each step performed by a terminal in any of the above methods. For another example, another apparatus is provided, comprising units or modules for implementing each step performed by a network device (e.g., an access network device, a core network function node, a core network device, etc.) in any of the above methods.

[0208] It should be understood that the division of the various units or modules in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units or modules by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the rest by hardware circuits.

[0209] In the embodiment of the present disclosure, the processor is a circuit with signal processing capability. In one implementation, the processor can be a circuit with instruction reading and execution capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP); in another implementation, the processor can implement certain functions through the logical relationship of the hardware circuit, and the logical relationship of the above hardware circuit is fixed or reconfigurable, such as a hardware circuit implemented by a processor as an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and implementing the hardware circuit configuration can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0210] FIG7 is a schematic diagram of the structure of a user equipment UE proposed in an embodiment of the present disclosure. As shown in FIG7 , the user equipment UE 700 may include at least one of a receiving module 701 and a switching module 702 .

[0211] In some embodiments, the above-mentioned receiving module 701 is used to receive first signaling information sent by a network device, and the first signaling information is used to trigger the UE to switch to a target cell; wherein the first signaling information includes a first beam resource indicated by the network device; the switching module 702 is used to initiate a random access process to the target cell according to the first beam resource in the first signaling information.

[0212] Optionally, the receiving module 701 is configured to execute at least one of the communication steps (e.g., step 205, step 301, step 401, step 501, but not limited thereto) performed by the user equipment UE 101 in any of the above methods, which are not described in detail here. The switching module 702 is configured to execute at least one of the communication steps (e.g., step 206, step 302, step 303, step 304, step 402, step 403, step 404, step 502, step 503, step 504, step 505, step 506, step 507, step 508, step 509, but not limited thereto), which are not described in detail here.

[0213] FIG8 is a schematic diagram of the structure of a network device according to an embodiment of the present disclosure. As shown in FIG8 , the network device 800 may include: a sending module 801 .

[0214] In some embodiments, the sending module 801 is configured to send first signaling information to a user equipment UE to instruct the UE to initiate a random access process to the target cell according to the first beam resource in the first signaling information;

[0215] The first signaling information is sent to the user equipment UE, where the first signaling information is used to trigger the UE to switch to the target cell.

[0216] Optionally, the sending module 801 is used to execute at least one of the communication steps (such as step 204, step 401, step 801, but not limited thereto) performed by the network device 102 in any of the above methods, which will not be repeated here.

[0217] Figure 9 is a schematic diagram of the structure of a terminal 900 (e.g., user equipment) proposed in an embodiment of the present disclosure. Terminal 900 can be a chip, chip system, or processor that supports a network device implementing any of the above methods, or a chip, chip system, or processor that supports a terminal implementing any of the above methods. Terminal 900 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0218] As shown in Figure 9, terminal 900 includes one or more processors 901. Processor 901 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control communication devices (such as base stations, baseband chips, terminal devices, terminal device chips, DUs or CUs, etc.), execute programs, and process program data. Terminal 900 is used to perform any of the above methods.

[0219] In some embodiments, the terminal 900 further includes one or more memories 902 for storing instructions. Optionally, all or part of the memories 902 may be located outside the terminal 900.

[0220] In some embodiments, the terminal 900 further includes one or more transceivers 904. When the terminal 900 includes one or more transceivers 904, the transceiver 904 performs at least one of the communication steps such as sending and / or receiving in the above method (for example, step 202, step 204, step 205, step 301, step 305, step 401, step 402, step 501, and step 601, but not limited thereto), and the processor 901 performs at least one of the other steps (for example, step 201, step 203, step 206, step 302, step 303, step 304, step 402, step 404, step 404, step 502, step 503, step 504, step 505, step 506, step 507, step 508, and step 509, but not limited thereto).

[0221] In some embodiments, a transceiver may include a receiver and / or a transmitter. The receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, and transceiver circuit may be used interchangeably; the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be used interchangeably; and the terms receiver, receiving unit, receiver, and receiving circuit may be used interchangeably.

[0222] In some embodiments, terminal 900 may include one or more interface circuits 903. Optionally, interface circuit 903 is connected to memory 902. Interface circuit 903 may be configured to receive signals from memory 902 or other devices, and may be configured to send signals to memory 902 or other devices. For example, interface circuit 903 may read instructions stored in memory 902 and send the instructions to processor 901.

[0223] The terminal 900 described in the above embodiment may be a communication device such as a user device, but the scope of the terminal 900 described in the present disclosure is not limited thereto, and the structure of the terminal 900 may not be limited by FIG. 9 . The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: (1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0224] FIG10 is a schematic diagram of the structure of a chip 1000 according to an embodiment of the present disclosure. If the terminal 900 is a chip or a chip system, reference may be made to the schematic diagram of the structure of the chip 1000 shown in FIG10 , but the present disclosure is not limited thereto.

[0225] The chip 1000 includes one or more processors 1001 , and the chip 1000 is configured to execute any of the above methods.

[0226] In some embodiments, chip 1000 further includes one or more 1003. Optionally, interface circuit 1003 is connected to memory 1002. Interface circuit 1003 can be used to receive signals from memory 1002 or other devices, and interface circuit 1003 can be used to send signals to memory 1002 or other devices. For example, interface circuit 1003 can read instructions stored in memory 1002 and send the instructions to processor 1001.

[0227] In some embodiments, the interface circuit 1003 executes the communication steps such as sending and / or receiving in the above method (for example, step 202, step 204, step 205, step 301, step 305, step 401, step 402, step 501, step 601, but not limited to at least one of them), and the processor 1001 executes at least one of the other steps (for example, step 201, step 203, step 206, step 302, step 303, step 304, step 402, step 404, step 404, step 502, step 503, step 504, step 505, step 506, step 507, step 508, step 509, but not limited to these).

[0228] In some embodiments, terms such as interface circuit, interface, transceiver pin, and transceiver may be used interchangeably.

[0229] In some embodiments, the chip 1000 further includes one or more memories 1002 for storing instructions. Alternatively, all or part of the memory 1002 may be external to the chip 1000.

[0230] The present disclosure also provides a storage medium having instructions stored thereon. When the instructions are executed on the terminal 900, the terminal 900 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto and may also be a transient storage medium.

[0231] The present disclosure also provides a program product, which, when executed by the terminal 900, enables the terminal 900 to perform any of the above methods. Optionally, the program product is a computer program product.

[0232] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

Claims

1. A cell switching method, applied to a user equipment UE, characterized in that: The method comprises: Receiving first signaling information sent by a network device, where the first signaling information is used to trigger the UE to switch to a target cell, wherein the first signaling information includes a first beam resource indicated by the network device; A random access process is initiated to the target cell according to the first beam resource in the first signaling information.

2. The cell switching method according to claim 1, characterized in that: The initiating a random access process to the target cell according to the first beam resource in the first signaling information includes: Using the first beam resource, initiating random access to the target cell at a first random access opportunity RO corresponding to the first beam resource; or Determine whether to use the first beam resource to initiate random access to the target cell according to the identification information in the first signaling information.

3. The cell switching method according to claim 2, characterized in that: The determining, according to the identification information in the first signaling information, whether to use the first beam resource to initiate random access to the target cell includes at least one of the following: The identification information indicates that the first beam resource is used to initiate random access to the target cell, and the first beam resource is used to initiate random access to the target cell at a first RO corresponding to the first beam resource; The identification information indicates that the first beam resource is not used to initiate random access to the target cell, and the UE reselects a second beam resource and initiates random access to the target cell at a second RO corresponding to the second beam resource.

4. The cell switching method according to claim 2 or 3, characterized in that: The identification information includes: An identification field added in the first signaling information, the identification field being used to carry the identification information; or The transmission configuration indication TCI field in the first signaling information.

5. The cell switching method according to any one of claims 2 to 4, characterized in that: The initiating a random access process to the target cell according to the first beam resource in the first signaling information includes at least one of the following: Using the first beam resource, at a first random access opportunity RO corresponding to the first beam resource, attempt to initiate random access to the target cell; if the random access fails, continue to attempt random access at the first random access opportunity RO corresponding to the first beam resource and the number of attempts shall not exceed N-1 times, where N is a positive integer; Performing L1 measurement on the target cell, and if the L1 measurement result of the first beam resource is greater than a preset threshold, using the first beam resource to initiate random access to the target cell at a first random access opportunity RO corresponding to the first beam resource; Use the first beam resource, and attempt to initiate random access to the target cell at the first random access opportunity RO corresponding to the first beam resource; if the random access fails, continue to attempt random access at the first random access opportunity RO corresponding to the first beam resource and continue to attempt no more than N-1 times; and in a case where N-1 attempts to initiate random access to the target cell fail, re-perform L1 measurement on the target cell to select a beam, and if the L1 measurement result of the first beam resource is greater than a preset threshold, initiate random access to the target cell at the first random access opportunity RO corresponding to the first beam resource.

6. The cell switching method according to claim 5, characterized in that: The using the first beam resource to attempt to initiate random access to the target cell at a first random access opportunity RO corresponding to the first beam resource includes: If the access is successful during the random access attempt, random access is no longer initiated to the target cell.

7. The cell switching method according to claim 5, characterized in that: The performing L1 measurement on the target cell includes: If the L1 measurement result of the first beam resource is less than or equal to the preset threshold, a third beam resource is selected, and random access is initiated to the target cell at a third RO corresponding to the third beam resource.

8. A cell switching method, applied to a network device, characterized in that: The method comprises: Sending first signaling information to a user equipment UE, instructing the UE to initiate a random access process to a target cell according to a first beam resource in the first signaling information; The first signaling information is used to trigger the UE to switch to the target cell.

9. The cell switching method according to claim 8, characterized in that: The first signaling information includes identification information, and the identification information indicates whether the UE uses the first beam resources to initiate random access to the target cell.

10. The cell switching method according to claim 8 or 9, characterized in that: The identification information of the first signaling information includes: An identification field added in the first signaling information, the identification field being used to carry the identification information; or The transmission configuration indication TCI field in the first signaling information.

11. A user equipment UE, characterized in that: The user equipment UE includes: A receiving module, configured to receive first signaling information sent by a network device, where the first signaling information is used to trigger the UE to switch to a target cell; wherein the first signaling information includes a first beam resource indicated by the network device; A switching module is used to initiate a random access process to the target cell according to the first beam resource in the first signaling information.

12. A network device, characterized in that: The network equipment includes: A sending module, configured to send first signaling information to a user equipment UE to instruct the UE to initiate a random access process to a target cell according to a first beam resource in the first signaling information; The first signaling information is sent to the user equipment UE, where the first signaling information is used to trigger the UE to switch to the target cell.

13. A user equipment UE, characterized in that: include: one or more processors; The user equipment UE is used to execute the cell switching method according to any one of claims 1 to 7.

14. A network device, characterized in that: include: one or more processors; The network device is used to execute the cell switching method according to any one of claims 8 to 10.

15. A communication system, characterized in that: It comprises a user equipment UE and a network device; wherein the user equipment UE is configured to implement the cell switching method according to any one of claims 1 to 7, and the network device is configured to implement the cell switching method according to any one of claims 8 to 10.

16. A storage medium storing instructions, characterized in that: When the instruction is executed on a communication device, the communication device is enabled to execute the cell switching method according to any one of claims 1 to 7, or execute the cell switching method according to any one of claims 8 to 10.

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