Condition switching method and device and related equipment

Abstract

Provided are a condition switching method, device and related equipment, which relate to the technical field of communications, the method comprising: configuring a condition switching configuration of a target terminal, the condition switching configuration comprising a link switching condition; sending the conditional switching configuration to the target terminal, the conditional switching configuration being used by the target terminal to determine whether to switch to a target object based on the link switching condition, the target object comprising a target relay terminal and / or a target cell; and under the condition that the target terminal is switched to a target object and a target base station and the source base station are not the same base station, switching information sent by the target base station is received, and the target base station is a service base station of the target object. According to the embodiment of the invention, the terminal judges whether to switch to the target object based on the link switching condition, so that the terminal can replace the communication link in time.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a conditional switching method, device and related equipment. Background Art

[0002] In the prior art, the service base station to which the terminal or relay terminal belongs decides the selection or switching of the direct link and the side link, including the scenario of not changing the service base station and changing the service base station. For a terminal or relay terminal that moves at a high frequency or high speed, the terminal or relay terminal may not be able to correctly receive the link switching or reconfiguration message sent by the service base station, resulting in the terminal being unable to change the communication link in time. Summary of the invention

[0003] The embodiments of the present invention provide a conditional switching method, apparatus and related equipment to solve the problem in the prior art that the terminal or relay terminal cannot correctly receive the link switching or reconfiguration message sent by the serving base station, resulting in the terminal being unable to change the communication link in time.

[0004] In order to solve the above technical problems, the present invention is implemented as follows:

[0005] In a first aspect, an embodiment of the present invention provides a conditional switching method applied to a source base station, where the source base station is a source base station of a target terminal, and the method includes:

[0006] Configuring a conditional switching configuration of a target terminal, wherein the conditional switching configuration includes a link switching condition;

[0007] Sending the conditional switching configuration to the target terminal, where the conditional switching configuration is used by the target terminal to determine whether to switch to a target object based on the link switching condition, where the target object includes a target relay terminal and / or a target cell;

[0008] When the target terminal switches to the target object and the target base station is not the same as the source base station, the switching information sent by the target base station is received, and the target base station is the serving base station of the target object.

[0009] In a second aspect, an embodiment of the present invention provides a conditional switching method, which is applied to a terminal, where the terminal is a target terminal, and the method includes:

[0010] receiving a conditional switching configuration sent by a source base station, wherein the conditional switching configuration includes a link switching condition;

[0011] Based on the link switching condition, it is determined whether to switch to a target object, where the target object includes a target relay terminal and / or a target cell.

[0012] In a third aspect, an embodiment of the present invention provides a conditional switching method, which is applied to a target base station, where the target base station is a serving base station of a target object, and the method includes:

[0013] When the target terminal switches to the target object based on the link switching condition of the conditional switching configuration, and when the target base station and the source base station are not the same base station, the switching information is sent to the source base station, and the source base station is the source base station of the target terminal.

[0014] In a fourth aspect, an embodiment of the present invention provides a conditional switching device, the device comprising:

[0015] A first configuration module, configured to configure a conditional switching configuration of a target terminal, wherein the conditional switching configuration includes a link switching condition;

[0016] A first sending module, configured to send the conditional switching configuration to the target terminal, wherein the conditional switching configuration is used by the target terminal to determine whether to switch to a target object based on the link switching condition, wherein the target object includes a target relay terminal and / or a target cell;

[0017] The first receiving module is used to receive the switching information sent by the target base station when the target terminal switches to the target object and the target base station and the source base station are not the same base station, and the target base station is the serving base station of the target object.

[0018] In a fifth aspect, an embodiment of the present invention provides a conditional switching device, the device comprising:

[0019] A first receiving module, configured to receive a conditional switching configuration sent by a source base station, wherein the conditional switching configuration includes a link switching condition;

[0020] The switching module is used to determine whether to switch to a target object based on the link switching condition, and the target object includes a target relay terminal and / or a target cell.

[0021] In a sixth aspect, an embodiment of the present invention provides a conditional switching device, the device comprising:

[0022] The first sending module is used to send switching information to the source base station when the target terminal switches to the target object based on the link switching condition of the conditional switching configuration, and when the target base station and the source base station are not the same base station. The source base station is the source base station of the target terminal.

[0023] In the seventh aspect, an embodiment of the present invention further provides a base station, comprising: a processor, a memory, and a program stored in the memory and executable on the processor. When the program is executed by the processor, the various processes of the above-mentioned conditional switching method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0024] The processor is used to configure a conditional switching configuration of the target terminal, wherein the conditional switching configuration includes a link switching condition;

[0025] The transceiver is used to send the conditional switching configuration to the target terminal, where the conditional switching configuration is used by the target terminal to determine whether to switch to a target object based on the link switching condition, where the target object includes a target relay terminal and / or a target cell;

[0026] The transceiver is further used to receive switching information sent by the target base station when the target terminal switches to the target object and the target base station is not the same as the source base station, and the target base station is the serving base station of the target object.

[0027] In an eighth aspect, an embodiment of the present invention provides a terminal, including a transceiver and a processor;

[0028] The transceiver is used to receive a conditional switching configuration sent by a source base station, wherein the conditional switching configuration includes a link switching condition;

[0029] The processor is used to determine whether to switch to a target object based on the link switching condition, where the target object includes a target relay terminal and / or a target cell.

[0030] In a ninth aspect, an embodiment of the present invention provides a base station, including a transceiver and a processor;

[0031] The transceiver is used to send switching information to the source base station when the target terminal switches to the target object based on the link switching condition of the conditional switching configuration, and when the target base station is not the same base station as the source base station. The source base station is the source base station of the target terminal.

[0032] In the tenth aspect, an embodiment of the present invention provides a base station, comprising: a processor, a memory, and a program stored in the memory and executable on the processor, wherein when the program is executed by the processor, the steps of the conditional switching method described in the first aspect are implemented; or, when the program is executed by the processor, the steps of the conditional switching method described in the third aspect are implemented.

[0033] In the eleventh aspect, an embodiment of the present invention provides a terminal, comprising: a processor, a memory, and a program stored in the memory and executable on the processor, wherein when the program is executed by the processor, the steps of the conditional switching method described in the second aspect are implemented.

[0034] In the twelfth aspect, an embodiment of the present invention provides a terminal, a computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the conditional switching method as described in the first aspect are implemented; or when the computer program is executed by a processor, the steps of the conditional switching method as described in the second aspect are implemented; or when the computer program is executed by a processor, the steps of the conditional switching method as described in the third aspect are implemented.

[0035] In the embodiment of the present invention, the source base station configures the conditional switching configuration of the terminal and sends the conditional switching configuration to the terminal. In the embodiment of the present invention, there is no need to wait for the source base station to send a link switching or reconfiguration message to the terminal. Instead, the terminal determines whether to switch to the target object based on the link switching condition in the conditional switching configuration. The target object includes the target relay terminal and / or the target cell. It can be seen that the terminal in the embodiment of the present invention can evaluate whether to switch to the target relay terminal and / or the target cell by itself, so as to determine whether to change the communication link in time according to the evaluation result. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0037] Figure 1 A schematic diagram of an edge link relay communication provided by an embodiment of the present invention;

[0038] Figure 2 One of the flow charts of a conditional switching method provided by an embodiment of the present invention;

[0039] Figure 3 A second flowchart of a conditional switching method provided by an embodiment of the present invention;

[0040] Figure 4 A third flowchart of a conditional switching method provided by an embodiment of the present invention;

[0041] Figure 5 One of the structural schematic diagrams of a conditional switching device provided by an embodiment of the present invention;

[0042] Figure 6 A second structural diagram of a conditional switching device provided by an embodiment of the present invention;

[0043] Figure 7 A third structural diagram of a conditional switching device provided by an embodiment of the present invention;

[0044] Figure 8 A schematic diagram of the structure of a base station provided in an embodiment of the present invention;

[0045] Fig. 9 A schematic diagram of the structure of a terminal provided by an embodiment of the present invention;

[0046] Fig.10 A schematic diagram of the structure of another base station provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] For ease of understanding, some contents involved in the embodiments of the present invention are described below:

[0049] Conditional Hand Over (CHO) is a mechanism to enhance the robustness of the handover process. When the quality of the wireless connection between the terminal (User Equipment, UE) and the serving cell is relatively good, the source base station can configure a conditional handover command for the UE based on the UE's measurement report.

[0050] See also Figure 1 , Side Link Relay or Side Link Relay (SL relay) is a method to improve the communication quality of remote terminal (remote UE). When the remote UE is located at the edge of the cell or the communication quality of the user network universal interface (Uu) between the remote UE and the base station is low due to occlusion, the communication between the remote UE and the relay terminal service base station can be established through the relay terminal (relay UE). The communication between the remote UE and the relay UE usually adopts the side link (or PC5 link).

[0051] The remote UE may also be expressed as a UE-to-Network (U2N) Remote UE or a L2 U2N Remote UE, and the relay UE may also be expressed as a U2N Relay UE or a L2 U2N Relay UE.

[0052] The prior art uses the serving base station to which the UE or relay UE belongs to decide on the selection or switching of the Uu and SL Relay links, including scenarios where the serving base station (or serving cell) is not changed and where the serving base station (or serving cell) is changed. For scenarios with high frequency or high speed movement, such as scenarios where the UE and relay UE move quickly together, the UE or relay may not correctly receive the Uu and SL relay link switching or reconfiguration message sent by the serving base station (e.g., it cannot receive the link switching or reconfiguration message in time or cannot correctly parse the link switching or reconfiguration message, etc.), so that the UE cannot change the link in time, resulting in a radio link failure (RLF) or a handover failure (HOF).

[0053] In an embodiment of the present invention, a conditional switching method, apparatus and related equipment are proposed to solve the problem in the prior art that the terminal or relay terminal cannot correctly receive the link switching or reconfiguration message sent by the service base station, resulting in the terminal being unable to change the communication link in time.

[0054] See also Figure 2 , Figure 2 is one of the flow charts of a conditional switching method provided by an embodiment of the present invention, which is used for a source base station, such as Figure 2 As shown, the method comprises the following steps:

[0055] Step 101: configure a conditional switching configuration of a target terminal, wherein the conditional switching configuration includes a link switching condition;

[0056] Step 102: Send the conditional switching configuration to the target terminal, where the conditional switching configuration is used by the target terminal to determine whether to switch to a target object based on the link switching condition, where the target object includes a target relay terminal and / or a target cell;

[0057] Step 103: When the target terminal switches to the target object and the target base station and the source base station are not the same base station, receive switching information sent by the target base station, and the target base station is the serving base station of the target object.

[0058] In step 101, the conditional switching configuration includes a link switching condition, and the conditional switching configuration may also include relevant information of a candidate target object, and the candidate target object may be multiple or one, and the terminal determines whether to switch to the target object in the candidate target object based on the link switching condition in the conditional switching configuration. Among them, the relevant information of the candidate target object is, for example: in the case where the candidate target object includes a candidate target relay terminal, the relevant information of the candidate target object may include an identifier of the candidate target relay terminal (such as L2ID), and if the candidate target relay terminal is located in a different serving cell from the target terminal, it may also include an identifier of the cell where the candidate target relay terminal is located; in the case where the candidate target object includes a candidate target cell, the relevant information of the candidate target object may include an identifier of the candidate target cell.

[0059] In step 102, the source base station sends a conditional switching configuration to the target terminal. After receiving the configuration, the target terminal determines whether the link switching condition in the conditional switching configuration is met. If the condition is met, the target terminal can switch to the target object in the candidate target object. The target object includes a target relay terminal and / or a target cell, that is, the target terminal can determine whether to switch to the target relay terminal, or whether to switch to the target cell, or whether to switch to the target cell and the target relay terminal at the same time (establishing a dual link) based on the above judgment.

[0060] If the target terminal needs to switch to the target relay terminal based on the above judgment, and a PC5 connection has not been established between the target terminal and the target relay terminal, the target terminal first establishes a PC5 connection with the target relay terminal.

[0061] In step 103, when the target terminal switches to the target object, if the serving base station of the target object (i.e., the target base station) is the same base station as the source base station, the source base station may directly notify the base stations of other candidate target objects to prevent other candidate target objects from continuing to wait for the target terminal; if the target base station is not the same base station as the source base station, the target base station sends switching information to the source base station, and the switching information may include information about the target object, and the switching information also includes information indicating that the target terminal has switched to the target object. Among them, if the target base station is not the same base station as the source base station, when the target base station is the base station of the target relay terminal, the target relay terminal may first notify the target base station that the target terminal has switched to the target relay terminal, and then the target base station may notify the source base station (i.e., send switching information to the source base station).

[0062] In the embodiment of the present invention, the source base station configures the conditional switching configuration of the terminal and sends the conditional switching configuration to the terminal. In the embodiment of the present invention, there is no need to wait for the source base station to send a link switching or reconfiguration message to the terminal. Instead, the terminal determines whether to switch to the target object based on the link switching condition in the conditional switching configuration. The target object includes the target relay terminal and / or the target cell. It can be seen that the terminal in the embodiment of the present invention can evaluate whether to switch to the target relay terminal and / or the target cell by itself, so as to determine whether to change the communication link in time according to the evaluation result.

[0063] Optionally, a measurement result of at least one candidate object sent by the target terminal is received.

[0064] The at least one candidate object includes at least one candidate relay terminal and / or candidate cell. Before the source base station configures the conditional switching configuration of the target terminal, the source base station needs to receive the measurement result of at least one candidate object sent by the target terminal, and determine the candidate target object from at least one candidate object, and configure the information of the candidate target object (such as related identification, etc.) in the conditional switching configuration. The candidate target object determined by the source base station can be one or more. When there are multiple candidate objects, the source base station can determine whether each candidate object among the multiple candidate objects is a candidate target object, and can also select some candidate objects from the multiple candidate objects to determine whether they are candidate target objects.

[0065] The above-mentioned at least one candidate object measurement result may include the Uu measurement result of the target terminal (including the service cell and / or neighboring cell of the target terminal); relevant information of at least one candidate object, such as the identifier of at least one candidate object and the link quality, etc. As an example, the relevant information of at least one candidate object may include the relevant flag of at least one candidate object, for example: the L2 relay UE ID of at least one candidate relay terminal, the identifier of the service cell of the candidate relay terminal, the sidelink measurement information between the target terminal and the candidate relay terminal, such as the measurement value of the sidelink discovery (Sidelink discovery, SD), or the measurement value of the sidelink, and / or the Uu measurement value of the candidate relay terminal itself (the Uu measurement value of the candidate relay is sent to the UE via the PC5 link). The above-mentioned measurement values ​​are measurement values ​​related to the link quality. As an example, the above-mentioned measurement values ​​are such as reference signal received power (Reference Signal Receiving Power, RSRP), reference signal received quality (Reference Signal Receiving Quality, RSRQ) or signal to interference plus noise ratio (Signal toInterference plus Noise Ratio, SINR), etc.

[0066] In the embodiment of the present invention, a candidate target object is determined from at least one candidate object, and the determination rule of the candidate target object can be set according to the demand, for example, whether the serving base station of the candidate object agrees that the terminal switches to the candidate object based on the load of the candidate object, etc. If the base station agrees, the candidate object can be determined as the candidate target object. It can be seen that the embodiment of the present invention is conducive to improving the probability of successful switching of the target terminal by determining the candidate target object from at least one candidate object.

[0067] Optionally, the method further includes:

[0068] Sending a target switching request to a serving base station of a first candidate object among the at least one candidate object, where the serving base station of the first candidate object is a different base station from the source base station;

[0069] Receiving a confirmation message of the target switching request sent by the serving base station of the first candidate object;

[0070] The target switching request carries one or more of the following information:

[0071] Relevant information of the target terminal;

[0072] relevant information of the first candidate object;

[0073] Conditional switching indication information, wherein the conditional switching indication information is used to indicate that the target switching request is a conditional switching request;

[0074] The probability that the target terminal switches to the first candidate object.

[0075] It should be noted that if the serving base station of one or more candidate objects among at least one candidate object is the same as the above-mentioned source base station, the source base station can determine whether the one or more candidate objects are candidate target objects based on the relevant information of the one or more candidate objects and the probability of the target terminal switching to the one or more candidate objects. The above-mentioned relevant information: for example, link measurement information between the target terminal and the one or more candidate objects, for example: in the case where the candidate object is a candidate relay terminal, it may include the SD-RSRP or SL-RSRP of the target terminal and the one or more candidate relay terminals, the Uu measurement value of the one or more candidate relay terminals themselves,

[0076] In the case where the service base station of the first candidate object among the at least one candidate object is not the same as the source base station, if the source base station needs to determine whether the first candidate object is a candidate target object, it is necessary to send a target switching request to the service base station of the first candidate object. The target switching request carries one or more of the following information: relevant information of the target terminal; relevant information of the first candidate object; conditional switching indication information, the conditional switching indication information is used to indicate that the target switching request is a conditional switching request; the probability of the target terminal switching to the first candidate object.

[0077] The relevant information of the target terminal is, for example, the ID of the target terminal. When the target terminal is a remote UE, the ID of the target terminal may be the local ID (local ID) of the target terminal and / or the L2ID of the target terminal.

[0078] The relevant information of the first candidate object may include, for example, the relevant identifier of the first candidate object and at least one item of the relevant link measurement information of the first candidate object, etc. For another example, when the first candidate object is a candidate Relay, the relevant identifier of the first candidate object may include at least one item of the serving cell identifier of the candidate Relay and the L2 relay UE ID of the candidate Relay, and the relevant link measurement information of the first candidate object may include at least one item of the sidelink measurement information (such as SD-RSRP or SL-RSRP) between the target terminal and the candidate relay and the Uu measurement value of the candidate relay itself.

[0079] The conditional switching indication information is used to indicate that the target switching request is a conditional switching request, so that the first candidate object can determine subsequent information based on the switching indication information, such as determining that the target terminal will not switch immediately but conditionally switch.

[0080] The probability of the target terminal switching to the first candidate object may be determined by the source base station according to historical data. The following is an exemplary description of how to determine the switching probability.

[0081] The historical data may include the movement data of multiple terminals (such as movement direction, etc.), the movement data of multiple terminals in different time periods (such as working hours and non-working hours, and also such as peak hours and non-peak hours, etc.), and the movement data of multiple terminals in different periods (such as holidays and non-holiday time), etc. The source base station can predict the movement probability of the terminal in different directions, the movement probability of the terminal in different directions in different time periods, and the movement probability of the terminal in different directions in different periods based on the above historical data. Assuming that the source base station determines based on historical data that during the working period, the probability of the terminal turning left at the first traffic light intersection is 60%, the probability of turning right is 30%, and the probability of going straight is 10%, when the target terminal is at the first traffic light intersection during the working period, if the target terminal can switch to the first candidate object (the first candidate object is located on the left side of the target terminal) after turning left, then the probability of the target terminal switching to the first candidate object can be 60%.

[0082] After receiving the target switching request, the service base station of the first candidate object performs admission control. Specifically, it can determine whether to agree to the target terminal to switch to the first candidate object based on one or more of the information carried in the target switching request (it can also be based on the load condition of the first candidate object, etc.), and send a confirmation message of the target switching request to the source base station, the confirmation message includes agreeing to the target terminal to switch to the first candidate object or rejecting the target terminal to switch to the first candidate object. Wherein, when the first candidate object is the target object, the service base station of the first candidate object is the target base station, the target base station receives the target switching request sent by the source base station, and performs admission control.

[0083] As an example, the above can determine whether to agree to the target terminal switching to the first candidate object based on the probability of the target terminal switching to the first candidate object and / or the load condition of the first candidate object. For example, when the probability of the target terminal switching to the first candidate object is greater than the first threshold and / or the load condition of the first candidate object is lower than the second threshold, the target terminal is agreed to switch to the first candidate object, that is, the first candidate object is the candidate target object. It can be seen that the communication quality of the candidate target object determined by the embodiment of the present invention is better, which is conducive to improving the effect of conditional switching.

[0084] The source base station determines whether the first candidate object is the candidate target object based on the confirmation message. If the confirmation message is for agreeing that the target terminal switches to the first candidate object, the first candidate object is the candidate target object.

[0085] In an embodiment of the present invention, the target switching request is set to carry one or more of the following information: relevant information of the target terminal; relevant information of the first candidate object; conditional switching indication information, the conditional switching indication information is used to indicate that the target switching request is a conditional switching request; the probability of the target terminal switching to the first candidate object, thereby enriching the relevant information of the conditional switching, which is beneficial for the service base station of the first candidate object to determine whether to agree to switch to the first candidate object, and according to the above analysis, it is also beneficial to make the communication quality of the candidate target object better, thereby improving the effect of the conditional switching.

[0086] In some embodiments, if the serving base station of the first candidate object agrees that the target terminal switches to the first candidate object, and the first candidate object is a candidate relay, the serving base station may send the relevant configuration of the relay to the first candidate object, including uu relay radio link layer control protocol (Radio Link Control, RLC) entity information, PC5 relay RLC entity configuration information for relaying UE (Remote UE) data, PC5 media access control layer (Media Access Control, MAC) entity configuration information, PC5 physical layer (Physical Layer, PHY) entity configuration information, adaptation layer (Sidelink Relay addaption protocol, SRAP) configuration information, etc.

[0087] In some embodiments, if the serving base station of the first candidate object agrees that the target terminal switches to the first candidate object, and the first candidate object is a candidate relay, the serving base station may also page the candidate relay in an idle state or an inactive state to establish a Radio Resource Control (RRC) connection in preparation for the target terminal to switch over, wherein the paging message carries the paging reason for serving as a candidate relay.

[0088] In some embodiments, when the candidate target objects determined by the source base station include a candidate target relay terminal, and the candidate target relay terminal can no longer serve as a relay terminal due to its own movement or other reasons, the candidate target relay terminal may send a first indication message to the target terminal. After the target terminal receives the first indication message, the candidate target relay terminal may be eliminated to improve the conditional switching effect.

[0089] Optionally, when the target terminal is a Uu link terminal directly connected to a base station, the at least one candidate object is at least one candidate relay terminal, and the receiving a measurement result of the at least one candidate object sent by the target terminal includes:

[0090] configuring a first condition, and sending the first condition to the target terminal;

[0091] receiving a measurement result of the at least one candidate relay terminal sent by the target terminal based on the first condition;

[0092] The first condition includes at least one of the following:

[0093] When the Uu link measurement value of the target terminal is less than or equal to the first threshold value, measuring or judging the potential relay terminal;

[0094] Among the potential relay terminals, those whose Uu link measurement values ​​are less than or equal to the first highest value, and / or whose Uu link measurement values ​​are greater than or equal to the first lowest value are determined as candidate relay terminals (ie, screening rules for candidate relays).

[0095] After receiving the first condition, the target terminal may determine at least one candidate relay terminal based on the first condition.

[0096] As an example, if the first condition only includes: when the Uu link measurement value of the target terminal is less than or equal to the first threshold value, the potential relay terminal is measured or judged. Then the target terminal can measure or judge the potential relay terminal, and then determine at least one candidate relay terminal from the potential relay terminals based on its own needs or other preset needs. Among them, potential refers to a relay terminal from which the target terminal can currently obtain broadcast information (the broadcast message indicates that it can serve as a relay terminal), or a relay terminal that can currently respond to the broadcast message of the target terminal (the broadcast message indicates that a relay terminal is required), etc.

[0097] As an example, if the first condition includes a screening rule for candidate relays: a potential relay terminal having a Uu link measurement value less than or equal to a first maximum value, and / or a Uu link measurement value greater than or equal to a first minimum value is determined as the candidate relay terminal. Then at least one candidate relay terminal determined by the target terminal must satisfy the screening rule for the candidate relay.

[0098] In the screening rules for candidate relays, when the Uu link measurement value in the potential relay terminal is less than or equal to the first maximum value, it can be proved that the potential relay terminal is close to its service cell. At this time, the potential relay terminal can receive the broadcast message of the target terminal or the target terminal can receive the broadcast message of the potential relay terminal, which proves that the target terminal is also close to the relay terminal. Furthermore, the target terminal is also close to the above-mentioned service cell. At this time, the target terminal does not need to determine the potential relay terminal that is less than or equal to the first maximum value as a candidate relay terminal.

[0099] The Uu link measurement value may be, for example, a Uu RSRP measurement value, a Uu RSRQ measurement value, or a Uu SINR measurement value of the UE.

[0100] In the embodiment of the present invention, the first condition is flexibly configured, which is conducive to improving the flexibility of the candidate relay terminals. In addition, in the prior art, the Uu link is usually switched to another Uu link. In the embodiment of the present invention, when the target terminal is a Uu link terminal, the candidate relay terminal can be determined. Subsequently, when the conditional switching configuration is met, the target terminal can also switch to the target relay terminal, thereby increasing the conditional switching selection of the Uu link terminal, which is conducive to improving the conditional switching effect and improving the communication quality of the Uu link interruption.

[0101] Optionally, in the case where the target terminal is a Uu link terminal, the target object includes a target relay terminal, and the link switching condition includes a first link switching condition and / or a second link switching condition;

[0102] The first link switching condition includes that the Uu link measurement value of the target terminal is less than or equal to a second threshold value;

[0103] The second link switching condition includes at least one of the following:

[0104] The Uu link measurement value of the target relay terminal is less than or equal to the second highest value, and / or greater than or equal to the second lowest value;

[0105] A PC5 link measurement value between the target relay terminal and the target terminal is greater than or equal to a third threshold value.

[0106] In this implementation, when the target terminal satisfies the first link switching condition and / or when there is a target relay terminal among the candidate target relay terminals that satisfies the second link switching condition, switching is performed to the target relay terminal.

[0107] As an example, if the link switching condition only includes the first link switching condition, the target terminal may select a target relay terminal to switch to from the candidate target relay terminals according to its own needs, other preset rules or randomly.

[0108] As an example, if the link switching condition includes both the first link switching condition and the second link switching condition, when the target terminal satisfies the first link switching condition and there is a target relay terminal among the candidate target relay terminals that satisfies the second link switching condition, the target terminal can switch to the target relay terminal.

[0109] It should also be noted that the above-mentioned PC5 link measurement values ​​include SD-RSRP measurement values, SL-RSRP measurement values, SD-RSRQ measurement values, SL-RSRQ measurement values, SD-SINR measurement values ​​or SL-SINR measurement values ​​of the PC5 link, and the above-mentioned Uu link measurement values ​​include Uu RSRP measurement values, Uu RSRQ measurement values ​​or Uu SINR measurement values ​​of the UE.

[0110] It is easy to understand that when the target terminal meets the first link switching condition, the Uu link quality of the target terminal may be poor. At this time, the target terminal switches the link to reduce the risk of further deterioration of the communication quality of the first link; when there is a target relay terminal among the candidate target relay terminals that meets the second link switching condition, the PC5 link quality between the target relay terminal and the target terminal is good and / or the Uu link quality of the target relay terminal meets the requirements. At this time, switching the target terminal to the target relay terminal is beneficial to improving the communication quality of the target terminal.

[0111] Optionally, when the target terminal is a remote terminal, the at least one candidate object is at least one candidate relay terminal and / or at least one candidate cell, and the receiving a measurement result of the at least one candidate object sent by the target terminal includes:

[0112] configuring a second condition, and sending the second condition to the target terminal;

[0113] receiving a measurement result of the at least one candidate relay terminal and / or the at least one candidate cell sent by the target terminal based on the second condition.

[0114] Compared with the CHO in the prior art which is usually switching from a Uu link to another Uu link, in the embodiment of the present invention, when the target terminal is a remote terminal, the target terminal can send the measurement result of at least one candidate relay terminal and / or the at least one candidate cell based on the second condition, so that when the conditional switching configuration is met later, the target terminal can also switch to the target relay terminal and / or the target cell, thereby increasing the conditional switching options of the remote UE, which is beneficial to improving the communication quality of the remote UE.

[0115] Optionally, the second condition includes at least one of the following:

[0116] a. When the PC5 link measurement value of the target terminal and the serving relay terminal is less than or equal to the fourth threshold value, the potential relay terminal and / or potential cell is measured or judged, and the serving relay terminal is the terminal that currently establishes a PC5 link with the target terminal;

[0117] b. When the Uu link measurement value of the serving relay terminal is greater than or equal to the third highest value, and / or less than or equal to the third lowest value, measuring or judging the potential relay terminal and / or the potential cell;

[0118] c. Determine the potential relay terminals whose Uu link measurement value is less than or equal to the first maximum value, and / or whose Uu link measurement value is greater than or equal to the first minimum value as candidate relay terminals (ie, screening rules for candidate relays);

[0119] d. Determine the cells whose Uu link measurement values ​​among the potential cells are greater than or equal to the fifth threshold value as candidate cells (ie, screening rules for candidate cells).

[0120] Regarding “potential”, please refer to the above embodiments, and to avoid repetition, it will not be described again.

[0121] The above-mentioned PC5 link measurement values ​​include the SD-RSRP measurement value, SL-RSRP measurement value, SD-RSRQ measurement value, SL-RSRQ measurement value, SD-SINR measurement value or SL-SINR measurement value of the PC5 link, and the above-mentioned Uu link measurement values ​​include the UuRSRP measurement value, Uu RSRQ measurement value or Uu SINR measurement value of the UE.

[0122] As an example, if the second condition includes a but does not include c or d, and the link measurement value between the target terminal and the current relay (serving relay terminal) is less than or equal to the fourth threshold value, the current communication quality of the target terminal may be poor, and the target terminal may measure or judge the potential relay terminal and / or potential cell. After measuring or judging, the target terminal may determine at least one candidate relay terminal and / or at least one candidate cell from the potential relay terminals based on its own needs or other preset needs.

[0123] If the second condition only includes b, but does not include c or d, and the Uu link measurement value of the current relay of the target terminal is greater than or equal to the third highest value, and / or less than or equal to the third lowest value, it can be characterized as that the current relay no longer meets the requirements, and the target terminal can measure or judge the potential relay terminals and / or potential cells, and can determine at least one candidate relay terminal and / or at least one candidate cell from the potential relay terminals based on its own needs or other preset needs.

[0124] When the second condition includes c, at least one candidate relay terminal determined by the target terminal must satisfy the screening rule of the candidate relay in c.

[0125] If the second condition includes d, at least one cell determined by the target terminal must satisfy the candidate cell screening rule in d above.

[0126] If the second condition includes a, b, c and d, the target terminal needs to measure or judge the potential relay terminals and / or potential cells when a and b are met; and based on the results of the measurement or judgment, it needs to determine from the potential relay terminals that satisfy c as a candidate relay terminal, and / or determine from the potential relay terminals that satisfy d as a candidate cell.

[0127] In the embodiment of the present invention, the second condition is flexibly configured, which is beneficial to improving the flexibility of candidate relay terminals and / or candidate cells.

[0128] Optionally, when the target terminal is a remote terminal, the target object includes a target relay terminal and / or a target cell, and the link switching condition includes at least one of the following:

[0129] The third link switching condition;

[0130] Second link switching condition;

[0131] fourth link switching condition;

[0132] The third link switching condition includes at least one of the following:

[0133] The Uu link measurement value of the serving relay terminal is greater than or equal to the second highest value, and / or less than or equal to the second lowest value, and the serving relay terminal is a terminal that currently establishes a PC5 link with the target terminal;

[0134] A PC5 link measurement value between the target terminal and the serving relay terminal is less than or equal to a fourth threshold value;

[0135] The second link switching condition includes at least one of the following:

[0136] The Uu link measurement value of the target relay terminal is less than or equal to the second highest value, and / or greater than or equal to the second lowest value;

[0137] A PC5 link measurement value between the target relay terminal and the target terminal is greater than or equal to a third threshold value;

[0138] The fourth link switching condition includes: a Uu link measurement value of the target cell is greater than or equal to a sixth threshold value.

[0139] As an example, if the link switching condition only includes the third link switching condition, the target terminal can select a target relay terminal to switch from the candidate target relay terminals according to its own needs, other preset rules or randomly, and / or select a target cell to switch from the candidate target cells.

[0140] As an example, if the link switching condition includes both the third link switching condition and the second link switching condition, when the target terminal satisfies the third link switching condition and there is a target relay terminal among the candidate target relay terminals that satisfies the second link switching condition, the target terminal can switch to the target relay terminal.

[0141] Similarly, as an example, if the link switching condition includes both the third link switching condition and the fourth link switching condition, the target terminal can switch to the target cell if the target terminal satisfies the third link switching condition and there is a target cell among the candidate target cells that satisfies the fourth link switching condition.

[0142] It is easy to understand that when the target terminal meets the third link switching condition, the PC5 link quality between the target terminal and the current relay may be poor, and / or the current relay of the target terminal no longer meets the requirements. At this time, the target terminal switches the link to reduce the risk of further deterioration of the communication quality of the first link; when there is a target relay terminal among the candidate target relay terminals that meets the second link switching condition, the PC5 link quality between the target relay terminal and the target terminal is good and / or the Uu link quality of the target relay terminal meets the requirements. At this time, switching the target terminal to the target relay terminal is beneficial to improving the communication quality of the target terminal; when there is a target cell among the candidate target cells that meets the fourth link switching condition, the Uu link quality of the target cell is good. At this time, switching the target terminal to the target cell is beneficial to improving the communication quality of the target terminal.

[0143] In some embodiments, when the link switching conditions include a third link switching condition, a second link switching condition, and a fourth link switching condition, it is possible to prioritize whether the target terminal satisfies the third link switching condition, and whether there is a target cell among the candidate target cells that satisfies the fourth link switching condition. If all of the above are met, the target terminal can be directly switched to the target cell without considering whether there is a target relay terminal that satisfies the second link switching condition. In this way, the computing resources of the target terminal can be saved while improving the communication quality of the target terminal.

[0144] When the target terminal satisfies the third link condition and the target cell does not satisfy the fourth link condition, it can be determined whether there is a target relay terminal among the candidate target relay terminals that satisfies the second link switching condition. If the target relay terminal satisfies the second link switching condition, it can be switched to the target relay terminal.

[0145] In order to more clearly understand the technical solutions of the embodiments of the present invention, two specific embodiments are provided below for illustration.

[0146] Example 1: If the UE is directly connected to the serving base station via a Uu direct link, i.e., a direct path:

[0147] A1: The base station configures the UE with a first condition for searching (judging) or measuring a candidate relay. The first condition includes at least one of the following:

[0148] The Uu RSRP measurement value threshold RSRP1 (first threshold value) of the UE, that is, when the Uu RSRP measurement value of the UE is lower than or not higher than RSRP1, the UE starts searching (judging) or measuring the candidate relay;

[0149] The screening rule of candidate relays, such as the highest value RSRPmax1 (first highest value) and / or the lowest value RSRPmin1 (first lowest value) of the Uu RSRP measurement value of the relay, that is, when the Uu RSRP measurement value of the relay is lower than or not higher than RSRPmax1, and / or higher than or not lower than RSRPmin1, the relay is a candidate relay;

[0150] A2: The UE reports measurement results and other information to the source base station, including the UE's own Uu measurement results; the L2 relay UE ID of at least one candidate relay UE, the identifier of the serving cell of at least one candidate relay; the sidelink measurement information between the UE and the relay, such as SD-RSRP or SL-RSRP and / or the candidate relay's own Uu measurement value (the candidate relay's Uu measurement value is sent to the UE via the PC5 link); if the UE receives the conditions for screening candidate relays configured by the base station in step A1, the reported candidate relay meets the conditions.

[0151] A3: The source base station determines a candidate target relay from the candidate relays based on the UE's measurement results. If the candidate relay belongs to another base station or cell, the base station sends a handover request message to the base station to which the candidate relay belongs, which carries one or more of the following information:

[0152] Related information of Remote UE (e.g., local ID of Remote UE and / or L2 ID of Remote UE);

[0153] Relevant information of the candidate relay (e.g., serving cell identifier of the candidate cell, L2 relay UEID of the candidate relay, sidelink measurement information (SD-RSRP or SL-RSRP) between the UE and the relay, and at least one of the Uu measurement value of the relay itself);

[0154] Conditional switching indication information (indication information indicating that the relay is a potential candidate relay for conditional switching or that the switching is a conditional switching);

[0155] The probability of the UE switching to the serving cell of the candidate relay or the candidate relay (calculated by the source base station based on its own experience, such as 60% of UEs at a traffic light intersection turn left, 30% turn right, and 10% go straight).

[0156] A4: The serving base station of the candidate relay performs admission control and sends the relevant configuration of the relay to the candidate relay, including uu relay RLC entity information, PC5 relay RLC entity configuration information for relaying UE (Remote UE) data, PC5 MAC entity configuration information, PC5 PHY entity configuration information, SRAP configuration information, and sends a handover request confirmation message to the source base station. Optionally, the above-mentioned serving base station can establish an RRC connection with the candidate relay that is idle or inactive in preparation for the UE to switch over.

[0157] A5: The source base station configures the UE with the selection of SL Relay based on conditional switching or the configuration related to switching (conditional switching configuration), including SL Relay across base stations (or across cells) and SL Relay that does not cross base stations (or across cells).

[0158] a) The serving cell ID of the candidate target relay and the ID of the candidate target relay (such as L2 ID)

[0159] b) The event of conditional switching corresponding to the relay: at least one of the first link switching condition and the second link switching condition;

[0160] First link switching condition: if the Uu RSRP measurement value of the UE is lower than or not higher than RSRP2 (second threshold value);

[0161] The second link switching condition includes at least one of the following:

[0162] i. The Uu RSRP measurement value of the relay is lower than or not higher than RSRPmax2 (the second highest value), and / or, higher than or not lower than RSRPmin2 (the second lowest value);

[0163] ii. The sidelink measurement information between the UE and the relay, such as SD-RSRP or SL-RSRP, is higher or not lower than a certain threshold value RSRPSL-1 (third threshold value);

[0164] A6: After receiving the conditional switching configuration, the UE evaluates whether the event of the aforementioned step A5 is met. If so, it switches to the target relay; if the PC5 connection has not been established between the UE and the relay, a PC5 connection is established first. Among them, if the Uu link of a candidate target relay does not meet the conditions for being a relay (when the candidate target relay sends a first indication message to the UE, the first indication information is used to indicate that the Uu link of the candidate target relay does not meet the preset relay condition), the UE is notified and the UE removes the relay from the candidate target relay.

[0165] A7: The target relay notifies the target base station that the UE has been switched to, and the target base station may further notify the source base station of the target relay information to which the UE has switched.

[0166] A8: The source base station notifies the base stations where other candidate target relays are located that the conditional switching of the UE is canceled, so that other candidate target relays and the serving base stations of the candidate target relays do not continue to wait for the UE.

[0167] Example 2: If the UE is directly connected to the serving base station through a relay, i.e., an indirect path

[0168] B1: The base station configures the UE through the relay to search (judge) or measure other candidate relays or direct link conditions (second condition), including at least one of the following:

[0169] The quality of SL is poor: the sidelink measurement information (such as SD-RSRP or SL-RSRP) between the UE and the current relay is lower than or not higher than a certain threshold value RSRPSL2 (the fourth threshold value);

[0170] The relay may become a non-compliant relay: the Uu RSRP measurement value of the current relay is higher than or not lower than RSRPmax3 (the third highest value), and / or, lower than or not higher than RSRPmin3 (the third lowest value);

[0171] The screening rule for candidate relays is that if the Uu RSRP measurement value of the relay is lower than or not higher than RSRPmax1 (the first highest value), and / or higher than or not lower than RSRPmin1 (the first lowest value), the relay is a candidate relay;

[0172] The screening rule of the candidate direct link is, for example, that the Uu RSRP measurement value of the current serving cell or the neighboring cell measured by the UE is higher than or not lower than RSRP Uu (fifth threshold value).

[0173] B2: The UE reports measurement results and other information to the source base station, including relevant information of the UE and relevant information of the candidate objects (candidate relays and / or candidate cells); for example: the UE's own Uu measurement results (serving cell and / or neighboring cell); at least one related flag of the candidate object (for example, the L2 relay UE ID of the candidate relay UE, the identifier of the serving cell of the candidate relay, the identifier of the candidate cell); the sidelink measurement information between the UE and the candidate relay (such as SD-RSRP or SL-RSRP) and / or the Uu measurement value of the candidate relay itself (the Uu measurement value of the candidate relay is sent to the UE via the PC5 link); the Uu measurement information of the candidate cell.

[0174] If the UE receives the condition for screening candidate relays or direct links configured by the base station in step B1, the cells corresponding to the reported candidate relays and direct links meet the condition.

[0175] B3: The source base station determines the candidate target object from the candidate objects based on the measurement results of the UE. If the candidate relay or candidate cell belongs to another base station or cell, the source base station sends a handover request message to the serving base station to which the candidate relay or cell belongs, which carries one or more of the following information:

[0176] UE related identification (for example, at least one of the local ID of the Remote UE and the L2 ID of the Remote UE);

[0177] Related information of the candidate object (e.g., at least one of the serving cell identifier of the candidate relay, the L2 relay UEID of the candidate relay, the sidelink measurement information between the UE and the candidate relay (e.g., SD-RSRP or SL-RSRP), and the Uu measurement value of the relay itself; and at least one of the flag of the candidate cell and the Uu link measurement value of the candidate cell);

[0178] Conditional switching indication information, indicating that the candidate object is a potential candidate object for conditional switching or that the switch is a conditional switching;

[0179] The probability of the UE switching to the candidate cell, and / or the probability of switching to the candidate relay and / or the serving cell of the candidate relay (calculated by the source base station based on its own experience, such as UE at a traffic light intersection, 60% turn left, 30% turn right, and 10% go straight).

[0180] B4: The serving base station of the candidate object performs admission control. When the candidate object includes a candidate relay, the serving base station sends the candidate relay related configuration, including uu relay RLC entity information, PC5 relay RLC entity configuration information for relaying UE (RemoteUE) data, PC5 MAC entity configuration information, PC5 PHY entity configuration information, SRAP configuration information, and sends a handover request confirmation message to the source base station. Optionally, the serving base station may page the candidate relay that is idle or inactive to establish an RRC connection in preparation for the UE to switch over, wherein the paging message carries the paging reason for serving as a candidate relay.

[0181] B5: The source base station configures the UE with the configuration related to the selection or switching of the SL Relay or direct link based on the conditional switching (i.e., the conditional switching configuration), including the SL Relay or target cell across base stations (or across cells), and the SL Relay or target cell that does not cross base stations (or across cells). Among them, it includes:

[0182] a) For cross-cell situations, the identifier of the candidate target cell and the identifier of the candidate target relay (such as L2 ID);

[0183] b) The event of conditional switching corresponding to the candidate target relay and / or the candidate target cell (at least one of the third link switching condition, the second link switching condition and the fourth link switching condition)

[0184] The third link switching condition includes at least one of the following:

[0185] The relay does not comply with the rule: the Uu RSRP measurement value of the current relay is higher than or not lower than RSRPmax2 (the second highest value), and / or, lower than or not higher than RSRPmin2 (the second lowest value);

[0186] SL quality is not high: the sidelink measurement information between the UE and the current relay, such as SD-RSRP or SL-RSRP, is lower than or not lower than a certain threshold value RSRPSL-2 (the fourth threshold value);

[0187] The second link switching condition includes at least one of the following:

[0188] The Uu RSRP measurement value of the target relay is lower than or not higher than RSRPmax2 (the second highest value), and / or, higher than or not lower than RSRPmin2 (the second lowest value),

[0189] The sidelink measurement information between the UE and the target relay, such as SD-RSRP or SL-RSRP, is higher or not lower than a certain threshold value RSRPSL-1 (third threshold value);

[0190] The fourth link switching condition includes: the Uu measurement value between the UE and the target cell is higher than or not lower than a certain threshold RSRP5 (sixth threshold value).

[0191] In particular, for the target direct link, the current relay situation may not be considered, that is, as long as a direct link that meets the conditions (in the same cell or across cells) is found, the UE may perform conditional switching to the target direct link.

[0192] B6: After receiving the configuration, the UE evaluates whether the event of the above step B5 is met. If so, it switches to the target relay and / or target cell; if a PC5 connection has not been established between the UE and the relay, a PC5 connection is established first.

[0193] B7: If the UE is switched to a target relay and / or target cell, the target base station is notified that the UE has been switched to the target relay and / or target cell. The target base station may further notify the source base station of the target relay and / or target cell information of the UE.

[0194] B8: The source base station notifies base stations where other candidate target relays and / or candidate target cells are located that the conditional switching of the UE is canceled, so as to prevent other candidate target relays or candidate target cells from continuing to wait for the UE.

[0195] See also Figure 3 , Figure 3 This is a second flow chart of a conditional method provided by an embodiment of the present invention, which is used for a target terminal, such as Figure 3 As shown, the method comprises the following steps:

[0196] Step 201: Receive a conditional switching configuration sent by a source base station, where the conditional switching configuration includes a link switching condition;

[0197] Step 202: Determine whether to switch to a target object based on the link switching condition, where the target object includes a target relay terminal and / or a target cell.

[0198] Optionally, when the target object includes the target relay terminal, the determining whether to switch to the target object based on the link switching condition includes:

[0199] When the link switching condition is met and the target terminal has not received the first indication information, switching to the target relay terminal is performed, wherein the first indication information is used to indicate that the Uu link of the target relay terminal does not meet the preset relay condition.

[0200] Optionally, the first indication information is sent by the target relay terminal.

[0201] Optionally, the method further includes:

[0202] When the target terminal is a Uu link terminal, a first condition sent by a source base station is received, where the first condition includes at least one of the following:

[0203] When the Uu link measurement value of the target terminal is less than or equal to the first threshold value, measuring or judging the potential relay terminal;

[0204] Determine the potential relay terminals whose Uu link measurement values ​​are less than or equal to the first highest value, and / or greater than or equal to the first lowest value as candidate relay terminals;

[0205] Based on the first condition, a measurement result of at least one candidate relay terminal is sent to the source base station.

[0206] Optionally, in the case where the target terminal is a Uu link terminal, the target object includes a target relay terminal, and the link switching condition includes a first link switching condition and / or a second link switching condition;

[0207] The first link switching condition includes: a Uu link measurement value of the target terminal is less than or equal to a second threshold value;

[0208] The second link switching condition includes at least one of the following:

[0209] The Uu link measurement value of the target relay terminal is less than or equal to the second highest value, and / or greater than or equal to the second lowest value;

[0210] A PC5 link measurement value between the target relay terminal and the target terminal is greater than or equal to a third threshold value.

[0211] Optionally, the method further includes:

[0212] When the target terminal is a remote terminal, receiving a second condition sent by the source base station;

[0213] Based on the second condition, a measurement result of at least one candidate relay terminal and / or at least one candidate cell is sent to the source base station.

[0214] Optionally, the second condition includes at least one of the following:

[0215] When the PC5 link measurement value between the target terminal and the serving relay terminal is less than or equal to a fourth threshold value, measuring or judging the potential relay terminal and / or the potential cell, the serving relay terminal being a terminal currently establishing a PC5 link with the target terminal;

[0216] When the Uu link measurement value of the serving relay terminal is greater than or equal to the third highest value and / or less than or equal to the third lowest measurement value, measuring or judging the potential relay terminal and / or the potential cell;

[0217] Determine, among the potential relay terminals, those whose Uu link measurement values ​​are less than or equal to the first highest value, and / or whose Uu link measurement values ​​are greater than or equal to the first lowest value as candidate relay terminals;

[0218] A cell whose Uu link measurement value is greater than or equal to a fifth threshold value among the potential cells is determined as a candidate cell.

[0219] Optionally, when the target terminal is a remote terminal, the target object includes a target relay terminal and / or a target cell, and the link switching condition includes at least one of the following:

[0220] The third link switching condition;

[0221] Second link switching condition;

[0222] fourth link switching condition;

[0223] The third link switching condition includes at least one of the following:

[0224] The Uu link measurement value of the serving relay terminal is greater than or equal to the second highest value, and / or less than or equal to the second lowest value, and the serving relay terminal is a terminal that currently establishes a PC5 link with the target terminal;

[0225] A PC5 link measurement value between the target terminal and the serving relay terminal is less than or equal to a fourth threshold value;

[0226] The second link switching condition includes at least one of the following:

[0227] The Uu link measurement value of the target relay terminal is less than or equal to the second highest value, and / or greater than or equal to the second lowest value;

[0228] A PC5 link measurement value between the target relay terminal and the target terminal is greater than or equal to a third threshold value;

[0229] The fourth link switching condition includes: a Uu link measurement value of the target cell is greater than or equal to a sixth threshold value.

[0230] Optionally, when the link switching condition includes a third link switching condition, a second link switching condition, and a fourth link switching condition, the determining whether to switch to the target object based on the link switching condition includes:

[0231] If the target terminal satisfies the third link condition and the target cell satisfies the fourth link condition, switching to the target cell; or,

[0232] When the target terminal satisfies the third link condition, and the target cell does not satisfy the fourth link condition, and the target relay terminal satisfies the second link switching condition, switching to the target relay terminal is performed.

[0233] It should be noted that this embodiment is as Figure 2 The implementation method of the corresponding target terminal in the embodiment shown in the figure can be found in the specific implementation method. Figure 2 In order to avoid repeated description, the relevant description of the embodiment shown will not be repeated in this embodiment, and the same beneficial effects can still be achieved.

[0234] See also Figure 4 , Figure 4 Flowchart 3 of a conditional switching method provided by an embodiment of the present invention, which is used for a target base station, such as Figure 4 As shown, the method comprises the following steps:

[0235] Step 301: When the target terminal switches to the target object based on the link switching condition of the conditional switching configuration, and when the target base station and the source base station are not the same base station, send switching information to the source base station, and the source base station is the source base station of the target terminal.

[0236] Optionally, receiving a target switching request sent by the source base station;

[0237] Perform admission control;

[0238] Sending a confirmation message of the target switching request to the source base station;

[0239] The target switching request carries one or more of the following information:

[0240] Relevant information of the target terminal;

[0241] Relevant information about the target object;

[0242] Conditional switching indication information, wherein the conditional switching indication information is used to indicate that the target switching request is a conditional switching request;

[0243] The probability that the target terminal switches to the target object. Optionally, when the target object is a target relay terminal, the method further includes:

[0244] The configuration of the target relay terminal is sent to the target relay terminal.

[0245] Optionally, when the target object is a target relay terminal, the method further includes:

[0246] The target relay terminal in the idle mode or the deactivated mode is paged.

[0247] It should be noted that this embodiment is as Figure 2 The implementation method of the corresponding target base station in the embodiment shown in the figure can be found in the specific implementation method. Figure 2 In order to avoid repeated description, the relevant description of the embodiment shown will not be repeated in this embodiment, and the same beneficial effects can still be achieved.

[0248] See also Figure 5 , Figure 5 is one of the structural diagrams of a conditional switching device provided by an embodiment of the present invention, such as Figure 5 As shown, the device 400 includes:

[0249] A first configuration module 401, configured to configure a conditional switching configuration of a target terminal, wherein the conditional switching configuration includes a link switching condition;

[0250] A first sending module 402 is used to send the conditional switching configuration to the target terminal, where the conditional switching configuration is used by the target terminal to determine whether to switch to a target object based on the link switching condition, where the target object includes a target relay terminal and / or a target cell;

[0251] The first receiving module 403 is used to receive the switching information sent by the target base station when the target terminal switches to the target object and the target base station and the source base station are not the same base station, and the target base station is the serving base station of the target object.

[0252] Optionally, the device 400 further includes:

[0253] The second receiving module is configured to receive a measurement result of at least one candidate object sent by the target terminal.

[0254] Optionally, the device 400 further includes:

[0255] A second sending module is used to send a target switching request to a serving base station of a first candidate object among the at least one candidate object, where the serving base station of the first candidate object is a different base station from the source base station;

[0256] A third receiving module, configured to receive a confirmation message of a target switching request sent by a serving base station of the first candidate object;

[0257] The target switching request carries one or more of the following information:

[0258] Relevant information of the target terminal;

[0259] relevant information of the first candidate object;

[0260] Conditional switching indication information, wherein the conditional switching indication information is used to indicate that the target switching request is a conditional switching request;

[0261] The probability that the target terminal switches to the first candidate object.

[0262] Optionally, when the target terminal is a Uu link terminal, the at least one candidate object is at least one candidate relay terminal, and the second receiving module includes:

[0263] A first configuration submodule, configured to configure a first condition and send the first condition to the target terminal;

[0264] A first receiving submodule, configured to receive a measurement result of the at least one candidate relay terminal sent by the target terminal based on the first condition;

[0265] The first condition includes at least one of the following:

[0266] When the Uu link measurement value of the target terminal is less than or equal to the first threshold value, measuring or judging the potential relay terminal;

[0267] Among the potential relay terminals, those whose Uu link measurement values ​​are less than or equal to the first highest value, and / or those whose Uu link measurement values ​​are greater than or equal to the first lowest value are determined as the candidate relay terminals.

[0268] Optionally, in the case where the target terminal is a Uu link terminal, the target object includes a target relay terminal, and the link switching condition includes a first link switching condition and / or a second link switching condition;

[0269] The first link switching condition includes that the Uu link measurement value of the target terminal is less than or equal to a second threshold value;

[0270] The second link switching condition includes at least one of the following:

[0271] The Uu link measurement value of the target relay terminal is less than or equal to the second highest value, and / or greater than or equal to the second lowest value;

[0272] A PC5 link measurement value between the target relay terminal and the target terminal is greater than or equal to a third threshold value.

[0273] Optionally, when the target terminal is a remote terminal, the at least one candidate object is at least one candidate relay terminal and / or at least one candidate cell, and the second receiving module includes:

[0274] A second configuration submodule, configured to configure a second condition and send the second condition to the target terminal;

[0275] The second receiving submodule is configured to receive the measurement result of the at least one candidate relay terminal and / or the at least one candidate cell sent by the target terminal based on the second condition.

[0276] Optionally, the second condition includes at least one of the following:

[0277] When the PC5 link measurement value between the target terminal and the serving relay terminal is less than or equal to a fourth threshold value, measuring or judging the potential relay terminal and / or the potential cell, the serving relay terminal being a terminal currently establishing a PC5 link with the target terminal;

[0278] When the Uu link measurement value of the serving relay terminal is greater than or equal to the third highest value and / or less than or equal to the third lowest value, measuring or judging the potential relay terminal and / or the potential cell;

[0279] Determine, among the potential relay terminals, those whose Uu link measurement values ​​are less than or equal to the first highest value, and / or whose Uu link measurement values ​​are greater than or equal to the first lowest value as candidate relay terminals;

[0280] A cell whose Uu link measurement value is greater than or equal to a fifth threshold value among the potential cells is determined as a candidate cell.

[0281] Optionally, when the target terminal is a remote terminal, the target object includes a target relay terminal and / or a target cell, and the link switching condition includes at least one of the following:

[0282] The third link switching condition;

[0283] Second link switching condition;

[0284] fourth link switching condition;

[0285] The third link switching condition includes at least one of the following:

[0286] The Uu link measurement value of the serving relay terminal is greater than or equal to the second highest value, and / or less than or equal to the second lowest value, and the serving relay terminal is a terminal that currently establishes a PC5 link with the target terminal;

[0287] A PC5 link measurement value between the target terminal and the serving relay terminal is less than or equal to a fourth threshold value;

[0288] The second link switching condition includes at least one of the following:

[0289] The Uu link measurement value of the target relay terminal is less than or equal to the second highest value, and / or greater than or equal to the second lowest value;

[0290] A PC5 link measurement value between the target relay terminal and the target terminal is greater than or equal to a third threshold value;

[0291] The fourth link switching condition includes: a Uu link measurement value of the target cell is greater than or equal to a sixth threshold value.

[0292] The device 400 can achieve Figure 2 The various processes implemented by the source base station in the method embodiment shown can achieve the same beneficial effects, and will not be described again here to avoid repetition.

[0293] See also Figure 6 , Figure 6 is a schematic diagram of a structure of a conditional switching device provided by an embodiment of the present invention, such as Figure 6 As shown, the device 500 includes:

[0294] A first receiving module 403 is configured to receive a conditional switching configuration sent by a source base station, wherein the conditional switching configuration includes a link switching condition;

[0295] The switching module is used to determine whether to switch to a target object based on the link switching condition, and the target object includes a target relay terminal and / or a target cell.

[0296] Optionally, in a case where the target object includes the target relay terminal, the switching mold body is used to:

[0297] When the link switching condition is met and the target terminal has not received the first indication information, switching to the target relay terminal is performed, wherein the first indication information is used to indicate that the Uu link of the target relay terminal does not meet the preset relay condition.

[0298] Optionally, the first indication information is sent by the target relay terminal.

[0299] Optionally, the terminal further includes:

[0300] The second receiving module is configured to receive, when the target terminal is a Uu link terminal, a first condition sent by a source base station, where the first condition includes at least one of the following:

[0301] When the Uu link measurement value of the target terminal is less than or equal to the first threshold value, measuring or judging the potential relay terminal;

[0302] Determine the potential relay terminals whose Uu link measurement values ​​are less than or equal to the first highest value, and / or greater than or equal to the first lowest value as candidate relay terminals;

[0303] The first sending module is used to send the measurement result of at least one candidate relay terminal to the source base station based on the first condition.

[0304] Optionally, in the case where the target terminal is a Uu link terminal, the target object includes a target relay terminal, and the link switching condition includes a first link switching condition and / or a second link switching condition;

[0305] The first link switching condition includes: a Uu link measurement value of the target terminal is less than or equal to a second threshold value;

[0306] The second link switching condition includes at least one of the following:

[0307] The Uu link measurement value of the target relay terminal is less than or equal to the second highest value, and / or greater than or equal to the second lowest value;

[0308] A PC5 link measurement value between the target relay terminal and the target terminal is greater than or equal to a third threshold value.

[0309] Optionally, the terminal further includes:

[0310] A third receiving module, configured to receive, when the target terminal is a remote terminal, a second condition sent by the source base station;

[0311] The second sending module is used to send the measurement result of at least one candidate relay terminal and / or at least one candidate cell to the source base station based on the second condition.

[0312] Optionally, the second condition includes at least one of the following:

[0313] When the PC5 link measurement value between the target terminal and the serving relay terminal is less than or equal to a fourth threshold value, measuring or judging the potential relay terminal and / or the potential cell, the serving relay terminal being a terminal currently establishing a PC5 link with the target terminal;

[0314] When the Uu link measurement value of the serving relay terminal is greater than or equal to the third highest value and / or less than or equal to the third lowest measurement value, measuring or judging the potential relay terminal and / or the potential cell;

[0315] Determine, among the potential relay terminals, those whose Uu link measurement values ​​are less than or equal to the first highest value, and / or whose Uu link measurement values ​​are greater than or equal to the first lowest value as candidate relay terminals;

[0316] A cell whose Uu link measurement value is greater than or equal to a fifth threshold value among the potential cells is determined as a candidate cell.

[0317] Optionally, when the target terminal is a remote terminal, the target object includes a target relay terminal and / or a target cell, and the link switching condition includes at least one of the following:

[0318] The third link switching condition;

[0319] Second link switching condition;

[0320] fourth link switching condition;

[0321] The third link switching condition includes at least one of the following:

[0322] The Uu link measurement value of the serving relay terminal is greater than or equal to the second highest value, and / or less than or equal to the second lowest value, and the serving relay terminal is a terminal that currently establishes a PC5 link with the target terminal;

[0323] A PC5 link measurement value between the target terminal and the serving relay terminal is less than or equal to a fourth threshold value;

[0324] The second link switching condition includes at least one of the following:

[0325] The Uu link measurement value of the target relay terminal is less than or equal to the second highest value, and / or greater than or equal to the second lowest value;

[0326] A PC5 link measurement value between the target relay terminal and the target terminal is greater than or equal to a third threshold value;

[0327] The fourth link switching condition includes: a Uu link measurement value of the target cell is greater than or equal to a sixth threshold value.

[0328] Optionally, when the link switching condition includes a third link switching condition, a second link switching condition, and a fourth link switching condition, the switching module is specifically configured to:

[0329] If the target terminal satisfies the third link condition and the target cell satisfies the fourth link condition, switching to the target cell; or,

[0330] When the target terminal satisfies the third link condition, and the target cell does not satisfy the fourth link condition, and the target relay terminal satisfies the second link switching condition, switching to the target relay terminal is performed.

[0331] The device 500 can achieve Figure 3 The various processes implemented by the target terminal in the method embodiment shown can achieve the same beneficial effects, and will not be described again here to avoid repetition.

[0332] See also Figure 7 , Figure 7 3 is a structural diagram of a conditional switching device provided by an embodiment of the present invention, such as Figure 7 As shown, the device 600 includes:

[0333] The first sending module 601 is used to send switching information to the source base station when the target terminal switches to the target object based on the link switching condition of the conditional switching configuration, and when the target base station and the source base station are not the same base station. The source base station is the source base station of the target terminal.

[0334] Optionally, the device 600 further includes:

[0335] A receiving module, used for receiving a target switching request sent by the source base station;

[0336] An execution module, used for executing admission control;

[0337] A second sending module, used to send a confirmation message of the target switching request to the source base station;

[0338] The target switching request carries one or more of the following information:

[0339] Relevant information of the target terminal;

[0340] Relevant information about the target object;

[0341] Conditional switching indication information, wherein the conditional switching indication information is used to indicate that the target switching request is a conditional switching request;

[0342] The probability that the target terminal switches to the target object.

[0343] Optionally, the device 600 further includes:

[0344] The third sending module is used to send the configuration of the target relay terminal to the target relay terminal.

[0345] Optionally, the device 600 further includes:

[0346] The fourth sending module is used to page the target relay terminal in the idle mode or the deactivated mode.

[0347] The device 600 can achieve Figure 4 The various processes implemented by the target base station in the method embodiment shown can achieve the same beneficial effects, and will not be described again here to avoid repetition.

[0348] An embodiment of the present invention also provides a base station, comprising: a processor, a memory, and a program stored in the memory and executable on the processor. When the program is executed by the processor, the various processes of the above-mentioned conditional switching embodiment applied to the source base station are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0349] For details, see Figure 8 As shown, an embodiment of the present invention further provides a base station, including a bus 701 , a transceiver 702 , an antenna 703 , a bus interface 704 , a processor 705 and a memory 706 .

[0350] The processor 705 is configured to configure a conditional switching configuration of the target terminal, wherein the conditional switching configuration includes a link switching condition;

[0351] The transceiver 702 is used to send the conditional switching configuration to the target terminal, where the conditional switching configuration is used by the target terminal to determine whether to switch to a target object based on the link switching condition, where the target object includes a target relay terminal and / or a target cell;

[0352] The transceiver 702 is further configured to receive switching information sent by a target base station when the target terminal switches to a target object and the target base station is not the same as the source base station, and the target base station is a serving base station of the target object.

[0353] Optionally, the transceiver 702 is further configured to receive a measurement result of at least one candidate object sent by the target terminal.

[0354] Optionally, the transceiver 702 is further configured to send a target switching request to a serving base station of a first candidate object among the at least one candidate object, where the serving base station of the first candidate object is a different base station from the source base station;

[0355] The transceiver 702 is further configured to receive a confirmation message of a target switching request sent by a serving base station of the first candidate object;

[0356] The target switching request carries one or more of the following information:

[0357] Relevant information of the target terminal;

[0358] relevant information of the first candidate object;

[0359] Conditional switching indication information, wherein the conditional switching indication information is used to indicate that the target switching request is a conditional switching request;

[0360] The probability that the target terminal switches to the first candidate object.

[0361] Optionally, when the target terminal is a Uu link terminal, the at least one candidate object is at least one candidate relay terminal, and the processor 705 is further configured to configure a first condition and send the first condition to the target terminal;

[0362] The transceiver 702 is further configured to receive a measurement result of the at least one candidate relay terminal sent by the target terminal based on the first condition;

[0363] The first condition includes at least one of the following:

[0364] When the Uu link measurement value of the target terminal is less than or equal to the first threshold value, measuring or judging the potential relay terminal;

[0365] Among the potential relay terminals, those whose Uu link measurement values ​​are less than or equal to the first highest value, and / or those whose Uu link measurement values ​​are greater than or equal to the first lowest value are determined as the candidate relay terminals.

[0366] Optionally, in the case where the target terminal is a Uu link terminal, the target object includes a target relay terminal, and the link switching condition includes a first link switching condition and / or a second link switching condition;

[0367] The first link switching condition includes that the Uu link measurement value of the target terminal is less than or equal to a second threshold value;

[0368] The second link switching condition includes at least one of the following:

[0369] The Uu link measurement value of the target relay terminal is less than or equal to the second highest value, and / or greater than or equal to the second lowest value;

[0370] A PC5 link measurement value between the target relay terminal and the target terminal is greater than or equal to a third threshold value.

[0371] Optionally, when the target terminal is a remote terminal, the at least one candidate object is at least one candidate relay terminal and / or at least one candidate cell, and the processor 705 is configured to configure a second condition and send the second condition to the target terminal;

[0372] The transceiver 702 is configured to receive a measurement result of the at least one candidate relay terminal and / or the at least one candidate cell sent by the target terminal based on the second condition.

[0373] Optionally, the second condition includes at least one of the following:

[0374] When the PC5 link measurement value between the target terminal and the serving relay terminal is less than or equal to a fourth threshold value, measuring or judging the potential relay terminal and / or the potential cell, the serving relay terminal being a terminal currently establishing a PC5 link with the target terminal;

[0375] When the Uu link measurement value of the serving relay terminal is greater than or equal to the third highest value and / or less than or equal to the third lowest value, measuring or judging the potential relay terminal and / or the potential cell;

[0376] Determine, among the potential relay terminals, those whose Uu link measurement values ​​are less than or equal to the first highest value, and / or whose Uu link measurement values ​​are greater than or equal to the first lowest value as candidate relay terminals;

[0377] A cell whose Uu link measurement value is greater than or equal to a fifth threshold value among the potential cells is determined as a candidate cell.

[0378] Optionally, when the target terminal is a remote terminal, the target object includes a target relay terminal and / or a target cell, and the link switching condition includes at least one of the following:

[0379] The third link switching condition;

[0380] Second link switching condition;

[0381] fourth link switching condition;

[0382] The third link switching condition includes at least one of the following:

[0383] The Uu link measurement value of the serving relay terminal is greater than or equal to the second highest value, and / or less than or equal to the second lowest value, and the serving relay terminal is a terminal that currently establishes a PC5 link with the target terminal;

[0384] A PC5 link measurement value between the target terminal and the serving relay terminal is less than or equal to a fourth threshold value;

[0385] The second link switching condition includes at least one of the following:

[0386] The Uu link measurement value of the target relay terminal is less than or equal to the second highest value, and / or greater than or equal to the second lowest value;

[0387] A PC5 link measurement value between the target relay terminal and the target terminal is greater than or equal to a third threshold value;

[0388] The fourth link switching condition includes: a Uu link measurement value of the target cell is greater than or equal to a sixth threshold value.

[0389] exist Figure 8 In the embodiment, the bus architecture (represented by bus 701) may include any number of interconnected buses and bridges, and bus 701 links various circuits including one or more processors represented by processor 705 and memory represented by memory 706. Bus 701 may also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. Bus interface 704 provides an interface between bus 701 and transceiver 702. Transceiver 702 may be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. Data processed by processor 705 is transmitted on a wireless medium via antenna 703, and further, antenna 703 also receives data and transmits the data to processor 705.

[0390] The processor 705 is responsible for managing the bus 701 and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management and other control functions. The memory 706 can be used to store data used by the processor 705 when performing operations.

[0391] Optionally, the processor 705 may be a CPU, an ASIC, an FPGA or a CPLD.

[0392] An embodiment of the present invention also provides a terminal, comprising: a processor, a memory, and a program stored in the memory and executable on the processor. When the program is executed by the processor, the various processes of the above-mentioned conditional switching method embodiment applied to the target terminal are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0393] For details, see Fig. 9As shown, an embodiment of the present invention further provides a terminal, including a bus 801 , a transceiver 802 , an antenna 803 , a bus interface 804 , a processor 805 and a memory 806 .

[0394] The transceiver 802 is used to receive a conditional switching configuration sent by a source base station, where the conditional switching configuration includes a link switching condition;

[0395] The processor 805 is configured to determine whether to switch to a target object based on the link switching condition, where the target object includes a target relay terminal and / or a target cell.

[0396] Optionally, when the target object includes the target relay terminal, the processor 805 is specifically configured to:

[0397] When the link switching condition is met and the target terminal has not received the first indication information, switching to the target relay terminal is performed, wherein the first indication information is used to indicate that the Uu link of the target relay terminal does not meet the preset relay condition.

[0398] Optionally, the first indication information is sent by the target relay terminal.

[0399] Optionally, the transceiver 802 is further configured to, when the target terminal is a Uu link terminal, receive a first condition sent by a source base station, where the first condition includes at least one of the following:

[0400] The processor 805 is further configured to measure or judge a potential relay terminal when the Uu link measurement value of the target terminal is less than or equal to a first threshold value;

[0401] The processor 805 is further configured to determine, among the potential relay terminals, a Uu link measurement value that is less than or equal to a first maximum value, and / or that is greater than or equal to a first minimum value as a candidate relay terminal;

[0402] Based on the first condition, a measurement result of at least one candidate relay terminal is sent to the source base station.

[0403] Optionally, in the case where the target terminal is a Uu link terminal, the target object includes a target relay terminal, and the link switching condition includes a first link switching condition and / or a second link switching condition;

[0404] The first link switching condition includes: a Uu link measurement value of the target terminal is less than or equal to a second threshold value;

[0405] The second link switching condition includes at least one of the following:

[0406] The Uu link measurement value of the target relay terminal is less than or equal to the second highest value, and / or greater than or equal to the second lowest value;

[0407] A PC5 link measurement value between the target relay terminal and the target terminal is greater than or equal to a third threshold value.

[0408] Optionally, the transceiver 802 is further configured to receive a second condition sent by the source base station when the target terminal is a remote terminal;

[0409] Based on the second condition, a measurement result of at least one candidate relay terminal and / or at least one candidate cell is sent to the source base station.

[0410] Optionally, the second condition includes at least one of the following:

[0411] When the PC5 link measurement value between the target terminal and the serving relay terminal is less than or equal to a fourth threshold value, measuring or judging the potential relay terminal and / or the potential cell, the serving relay terminal being a terminal currently establishing a PC5 link with the target terminal;

[0412] When the Uu link measurement value of the serving relay terminal is greater than or equal to the third highest value and / or less than or equal to the third lowest measurement value, measuring or judging the potential relay terminal and / or the potential cell;

[0413] Determine, among the potential relay terminals, those whose Uu link measurement values ​​are less than or equal to the first highest value, and / or whose Uu link measurement values ​​are greater than or equal to the first lowest value as candidate relay terminals;

[0414] A cell whose Uu link measurement value is greater than or equal to a fifth threshold value among the potential cells is determined as a candidate cell.

[0415] Optionally, when the target terminal is a remote terminal, the target object includes a target relay terminal and / or a target cell, and the link switching condition includes at least one of the following:

[0416] The third link switching condition;

[0417] Second link switching condition;

[0418] fourth link switching condition;

[0419] The third link switching condition includes at least one of the following:

[0420] The Uu link measurement value of the serving relay terminal is greater than or equal to the second highest value, and / or less than or equal to the second lowest value, and the serving relay terminal is a terminal that currently establishes a PC5 link with the target terminal;

[0421] A PC5 link measurement value between the target terminal and the serving relay terminal is less than or equal to a fourth threshold value;

[0422] The second link switching condition includes at least one of the following:

[0423] The Uu link measurement value of the target relay terminal is less than or equal to the second highest value, and / or greater than or equal to the second lowest value;

[0424] A PC5 link measurement value between the target relay terminal and the target terminal is greater than or equal to a third threshold value;

[0425] The fourth link switching condition includes: a Uu link measurement value of the target cell is greater than or equal to a sixth threshold value.

[0426] Optionally, when the link switching condition includes a third link switching condition, a second link switching condition, and a fourth link switching condition, the processor 805 is specifically configured to:

[0427] If the target terminal satisfies the third link condition and the target cell satisfies the fourth link condition, switching to the target cell; or,

[0428] When the target terminal satisfies the third link condition, and the target cell does not satisfy the fourth link condition, and the target relay terminal satisfies the second link switching condition, switching to the target relay terminal is performed.

[0429] exist Fig. 9 In the embodiment, the bus architecture (represented by bus 801) is shown, and bus 801 may include any number of interconnected buses and bridges, and bus 801 links various circuits including one or more processors represented by processor 805 and memory represented by memory 806. Bus 801 may also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. Bus interface 804 provides an interface between bus 801 and transceiver 802. Transceiver 802 may be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. Data processed by processor 805 is transmitted on a wireless medium via antenna 803, and further, antenna 803 also receives data and transmits the data to processor 805.

[0430] The processor 805 is responsible for managing the bus 801 and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management and other control functions. The memory 806 can be used to store data used by the processor 805 when performing operations.

[0431] Optionally, the processor 805 may be a CPU, an ASIC, an FPGA or a CPLD.

[0432] An embodiment of the present invention also provides a base station, comprising: a processor, a memory, and a program stored in the memory and executable on the processor. When the program is executed by the processor, the various processes of the above-mentioned conditional switching method embodiment applied to the target base station are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0433] For details, see Fig.10 As shown, an embodiment of the present invention further provides a base station, including a bus 901 , a transceiver 902 , an antenna 903 , a bus interface 904 , a processor 905 and a memory 906 .

[0434] The transceiver 902 is used to send switching information to the source base station when the target terminal switches to the target object based on the link switching condition of the conditional switching configuration, and when the target base station is not the same base station as the source base station. The source base station is the source base station of the target terminal.

[0435] Optionally, the transceiver 902 is further configured to receive a target switching request sent by the source base station;

[0436] The processor 905 is configured to perform admission control;

[0437] The transceiver 902 is further configured to send a confirmation message of the target switching request to the source base station;

[0438] The target switching request carries one or more of the following information:

[0439] Relevant information of the target terminal;

[0440] Relevant information about the target object;

[0441] Conditional switching indication information, wherein the conditional switching indication information is used to indicate that the target switching request is a conditional switching request;

[0442] The probability that the target terminal switches to the target object.

[0443] Optionally, when the target object is a target relay terminal, the transceiver 902 is further configured to send the configuration of the target relay terminal to the target relay terminal.

[0444] Optionally, when the target object is a target relay terminal, the transceiver 902 is further used to page the target relay terminal in an idle mode or a deactivated mode.

[0445] exist Fig.10 In the embodiment, the bus architecture (represented by bus 901) may include any number of interconnected buses and bridges, and bus 901 links various circuits including one or more processors represented by processor 905 and memory represented by memory 906. Bus 901 may also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. Bus interface 904 provides an interface between bus 901 and transceiver 902. Transceiver 902 may be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. Data processed by processor 905 is transmitted on a wireless medium via antenna 903, and further, antenna 903 also receives data and transmits the data to processor 905.

[0446] The processor 905 is responsible for managing the bus 901 and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management and other control functions. The memory 906 can be used to store data used by the processor 905 when performing operations.

[0447] Optionally, the processor 805 may be a CPU, an ASIC, an FPGA or a CPLD.

[0448] The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, each process of the above-mentioned conditional switching method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it is not repeated here. The computer-readable storage medium is, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0449] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0450] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0451] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A conditional switching method, characterized in that: Applied to a source base station, where the source base station is a source base station of a target terminal, the method includes: Configuring a conditional switching configuration of the target terminal, wherein the conditional switching configuration includes a link switching condition; Sending the conditional switching configuration to the target terminal, where the conditional switching configuration is used by the target terminal to determine whether to switch to a target object based on the link switching condition, where the target object includes a target relay terminal and / or a target cell; When the target terminal switches to the target object and the target base station is not the same as the source base station, the switching information sent by the target base station is received, and the target base station is the serving base station of the target object.

2. The method according to claim 1, characterized in that The method further comprises: receiving a measurement result of at least one candidate object sent by the target terminal.

3. The method according to claim 1, characterized in that Also includes: Sending a target switching request to a serving base station of a first candidate object among at least one candidate object, where the serving base station of the first candidate object is a different base station from the source base station, and the candidate object includes a candidate relay terminal and / or a candidate cell; Receiving a confirmation message of the target switching request sent by the serving base station of the first candidate object; The target switching request carries one or more of the following information: Relevant information of the target terminal; relevant information of the first candidate object; Conditional switching indication information, wherein the conditional switching indication information is used to indicate that the target switching request is a conditional switching request; The probability that the target terminal switches to the first candidate object.

4. The method according to claim 2, characterized in that: In a case where the target terminal is a Uu link terminal directly connected to a base station, the at least one candidate object is at least one candidate relay terminal, and the receiving a measurement result of the at least one candidate object sent by the target terminal includes: configuring a first condition, and sending the first condition to the target terminal; receiving a measurement result of the at least one candidate relay terminal sent by the target terminal based on the first condition; The first condition includes at least one of the following: When the Uu link measurement value of the target terminal is less than or equal to the first threshold value, measuring or judging the potential relay terminal; Among the potential relay terminals, those whose Uu link measurement values ​​are less than or equal to the first highest value, and / or those whose Uu link measurement values ​​are greater than or equal to the first lowest value are determined as the candidate relay terminals.

5. The method according to claim 1, characterized in that In the case where the target terminal is a Uu link terminal, the target object includes a target relay terminal, and the link switching condition includes a first link switching condition and / or a second link switching condition; The first link switching condition includes that the Uu link measurement value of the target terminal is less than or equal to a second threshold value; The second link switching condition includes at least one of the following: The Uu link measurement value of the target relay terminal is less than or equal to the second highest value, and / or greater than or equal to the second lowest value; A PC5 link measurement value between the target relay terminal and the target terminal is greater than or equal to a third threshold value.

6. The method according to claim 2, characterized in that In a case where the target terminal is a remote terminal, the at least one candidate object is at least one candidate relay terminal and / or at least one candidate cell, and the receiving a measurement result of the at least one candidate object sent by the target terminal includes: configuring a second condition, and sending the second condition to the target terminal; receiving a measurement result of the at least one candidate relay terminal and / or the at least one candidate cell sent by the target terminal based on the second condition.

7. The method according to claim 6, characterized in that The second condition includes at least one of the following: When the PC5 link measurement value between the target terminal and the serving relay terminal is less than or equal to a fourth threshold value, measuring or judging the potential relay terminal and / or the potential cell, the serving relay terminal being a terminal currently establishing a PC5 link with the target terminal; When the Uu link measurement value of the serving relay terminal is greater than or equal to the third highest value and / or less than or equal to the third lowest value, measuring or judging the potential relay terminal and / or the potential cell; Determine, among the potential relay terminals, those whose Uu link measurement values ​​are less than or equal to the first highest value, and / or whose Uu link measurement values ​​are greater than or equal to the first lowest value as candidate relay terminals; A cell whose Uu link measurement value is greater than or equal to a fifth threshold value among the potential cells is determined as a candidate cell.

8. The method according to claim 1, characterized in that In the case where the target terminal is a remote terminal, the target object includes a target relay terminal and / or a target cell, and the link switching condition includes at least one of the following: The third link switching condition; Second link switching condition; fourth link switching condition; The third link switching condition includes at least one of the following: The Uu link measurement value of the service relay terminal is greater than or equal to the second highest value, and / or less than or equal to the second lowest value, and the service relay terminal is a terminal that currently establishes a PC5 link with the target terminal; A PC5 link measurement value between the target terminal and the serving relay terminal is less than or equal to a fourth threshold value; The second link switching condition includes at least one of the following: The Uu link measurement value of the target relay terminal is less than or equal to the second highest value, and / or greater than or equal to the second lowest value; A PC5 link measurement value between the target relay terminal and the target terminal is greater than or equal to a third threshold value; The fourth link switching condition includes: a Uu link measurement value of the target cell is greater than or equal to a sixth threshold value.

9. A conditional switching method, characterized in that: Applied to a terminal, the terminal being a target terminal, the method comprises: receiving a conditional switching configuration sent by a source base station, wherein the conditional switching configuration includes a link switching condition; Based on the link switching condition, it is determined whether to switch to a target object, where the target object includes a target relay terminal and / or a target cell.

10. The method according to claim 9, characterized in that In a case where the target object includes the target relay terminal, the determining whether to switch to the target object based on the link switching condition includes: When the link switching condition is met and the target terminal has not received the first indication information, switching to the target relay terminal is performed, wherein the first indication information is used to indicate that the Uu link of the target relay terminal does not meet the preset relay condition.

11. The method according to claim 10, characterized in that The first indication information is sent by the target relay terminal.

12. The method according to claim 9, characterized in that The method further comprises: In a case where the target terminal is a Uu link terminal directly connected to a base station, a first condition sent by a source base station is received, where the first condition includes at least one of the following: When the Uu link measurement value of the target terminal is less than or equal to the first threshold value, measuring or judging the potential relay terminal; Determine the potential relay terminals whose Uu link measurement values ​​are less than or equal to the first highest value, and / or greater than or equal to the first lowest value as candidate relay terminals; Based on the first condition, a measurement result of at least one candidate relay terminal is sent to the source base station.

13. The method according to claim 9, characterized in that In the case where the target terminal is a Uu link terminal, the target object includes a target relay terminal, and the link switching condition includes a first link switching condition and / or a second link switching condition; The first link switching condition includes: a Uu link measurement value of the target terminal is less than or equal to a second threshold value; The second link switching condition includes at least one of the following: The Uu link measurement value of the target relay terminal is less than or equal to the second highest value, and / or greater than or equal to the second lowest value; A PC5 link measurement value between the target relay terminal and the target terminal is greater than or equal to a third threshold value.

14. The method according to claim 9, characterized in that The method further comprises: When the target terminal is a remote terminal, receiving a second condition sent by the source base station; Based on the second condition, a measurement result of at least one candidate relay terminal and / or at least one candidate cell is sent to the source base station.

15. The method according to claim 14, characterized in that The second condition includes at least one of the following: When the PC5 link measurement value between the target terminal and the serving relay terminal is less than or equal to a fourth threshold value, measuring or judging the potential relay terminal and / or the potential cell, the serving relay terminal being a terminal currently establishing a PC5 link with the target terminal; When the Uu link measurement value of the serving relay terminal is greater than or equal to the third highest value and / or less than or equal to the third lowest measurement value, measuring or judging the potential relay terminal and / or the potential cell; Determine, among the potential relay terminals, those whose Uu link measurement values ​​are less than or equal to the first highest value, and / or whose Uu link measurement values ​​are greater than or equal to the first lowest value as candidate relay terminals; A cell whose Uu link measurement value is greater than or equal to a fifth threshold value among the potential cells is determined as a candidate cell.

16. The method according to claim 9, characterized in that In the case where the target terminal is a remote terminal, the target object includes a target relay terminal and / or a target cell, and the link switching condition includes at least one of the following: The third link switching condition; Second link switching condition; fourth link switching condition; The third link switching condition includes at least one of the following: The Uu link measurement value of the service relay terminal is greater than or equal to the second highest value, and / or less than or equal to the second lowest value, and the service relay terminal is a terminal that currently establishes a PC5 link with the target terminal; A PC5 link measurement value between the target terminal and the serving relay terminal is less than or equal to a fourth threshold value; The second link switching condition includes at least one of the following: The Uu link measurement value of the target relay terminal is less than or equal to the second highest value, and / or greater than or equal to the second lowest value; A PC5 link measurement value between the target relay terminal and the target terminal is greater than or equal to a third threshold value; The fourth link switching condition includes: a Uu link measurement value of the target cell is greater than or equal to a sixth threshold value.

17. The method according to claim 16, characterized in that In a case where the link switching condition includes a third link switching condition, a second link switching condition, and a fourth link switching condition, the determining whether to switch to the target object based on the link switching condition includes: If the target terminal satisfies the third link condition and the target cell satisfies the fourth link condition, switching to the target cell; or, When the target terminal satisfies the third link condition, and the target cell does not satisfy the fourth link condition, and the target relay terminal satisfies the second link switching condition, switching to the target relay terminal is performed.

18. A conditional switching method, characterized in that: Applied to a target base station, the target base station is a serving base station of a target object, the method comprises: When the target terminal switches to the target object based on the link switching condition of the conditional switching configuration, and when the target base station and the source base station are not the same base station, switching information is sent to the source base station, and the source base station is the source base station of the target terminal.

19. The method according to claim 18, characterized in that The method further comprises: Receiving a target switching request sent by the source base station; Perform admission control; Sending a confirmation message of the target switching request to the source base station; The target switching request carries one or more of the following information: Relevant information of the target terminal; Relevant information about the target object; Conditional switching indication information, wherein the conditional switching indication information is used to indicate that the target switching request is a conditional switching request; The probability that the target terminal switches to the target object.

20. The method according to claim 18, characterized in that In the case where the target object is a target relay terminal, the method further includes: The configuration of the target relay terminal is sent to the target relay terminal.

21. The method according to claim 18, characterized in that In the case where the target object is a target relay terminal, the method further includes: The target relay terminal in the idle mode or the deactivated mode is paged.

22. A condition switching device, characterized in that: The device comprises: A first configuration module, configured to configure a conditional switching configuration of a target terminal, wherein the conditional switching configuration includes a link switching condition; A first sending module, configured to send the conditional switching configuration to the target terminal, wherein the conditional switching configuration is used by the target terminal to determine whether to switch to a target object based on the link switching condition, wherein the target object includes a target relay terminal and / or a target cell; The first receiving module is used to receive the switching information sent by the target base station when the target terminal switches to the target object and the target base station and the source base station are not the same base station, and the target base station is the serving base station of the target object.

23. A condition switching device, characterized in that: The device comprises: A first receiving module, configured to receive a conditional switching configuration sent by a source base station, wherein the conditional switching configuration includes a link switching condition; The switching module is used to determine whether to switch to a target object based on the link switching condition, and the target object includes a target relay terminal and / or a target cell.

24. A condition switching device, characterized in that: The device comprises: The first sending module is used to send switching information to the source base station when the target terminal switches to the target object based on the link switching condition of the conditional switching configuration, and when the target base station and the source base station are not the same base station. The source base station is the source base station of the target terminal.

25. A base station, characterized in that: including a transceiver and a processor; The processor is used to configure a conditional switching configuration of the target terminal, wherein the conditional switching configuration includes a link switching condition; The transceiver is used to send the conditional switching configuration to the target terminal, where the conditional switching configuration is used by the target terminal to determine whether to switch to a target object based on the link switching condition, where the target object includes a target relay terminal and / or a target cell; The transceiver is also used to receive switching information sent by the target base station when the target terminal switches to the target object and the target base station and the source base station are not the same base station, and the target base station is the serving base station of the target object.

26. A terminal, characterized in that: including a transceiver and a processor; The transceiver is used to receive a conditional switching configuration sent by a source base station, wherein the conditional switching configuration includes a link switching condition; The processor is used to determine whether to switch to a target object based on the link switching condition, where the target object includes a target relay terminal and / or a target cell.

27. A base station, characterized in that: including a transceiver and a processor; The transceiver is used to send switching information to the source base station when the target terminal switches to the target object based on the link switching condition of the conditional switching configuration, and when the target base station and the source base station are not the same base station. The source base station is the source base station of the target terminal.

28. A base station, characterized in that: include: A processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, implements the steps of the conditional switching method as described in any one of claims 1 to 8; or, the program, when executed by the processor, implements the steps of the conditional switching method as described in any one of claims 18 to 21.

29. A terminal, characterized in that: include: A processor, a memory, and a program stored in the memory and executable on the processor, wherein when the program is executed by the processor, the steps of the conditional switching method according to any one of claims 9 to 17 are implemented.

30. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the conditional switching method as described in any one of claims 1 to 8; or, when executed by a processor, implements the steps of the conditional switching method as described in any one of claims 9 to 17; or, when executed by a processor, implements the steps of the conditional switching method as described in any one of claims 18 to 21.

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