A method and apparatus in a communication node used for wireless communication

Abstract

A method and apparatus in a communication node used for wireless communication are disclosed. The communication node receives first signaling used to indicate at least a first target cell and a second target cell; performs a first handshaking procedure for the first target cell; performs a second handshaking procedure for the second target cell; determines whether to initiate an RRC connection reestablishment procedure according to whether at least one of the first handshaking procedure or the second handshaking procedure is successfully completed; both the first handshaking procedure and the second handshaking procedure not being successfully completed is used to determine to initiate the RRC connection reestablishment procedure; either the first handshaking procedure or the second handshaking procedure being successfully completed is used to determine not to initiate the RRC connection reestablishment procedure; at least the first handshaking procedure is for a primary cell change; a start time of the first handshaking procedure is not later than a start time of the second handshaking procedure.

Description

Technical Field

[0001] This application relates to transmission methods and apparatus in wireless communication systems, and more particularly to transmission methods and apparatus for mobility. Background Technology

[0002] In the prior art, the user equipment (UE) can perform handover in the RRC (Radio Resource Control) connected state (RRC_Connected). If the handover (HO) fails, it initiates the RRC connection re-establishment process. Summary of the Invention

[0003] The execution of the RRC connection re-establishment process will result in a relatively long data interruption. When the UE handover fails, it is necessary to enhance how to shorten the interruption latency.

[0004] To address the aforementioned issues, this application provides a solution. The problem description uses an NR (New Radio) scenario as an example; this application is also applicable to scenarios such as LTE (Long Term Evolution) or Sidelink (SL) transmission, achieving similar technical effects to the NR scenario. Furthermore, using a unified solution across different scenarios helps reduce hardware complexity and cost.

[0005] As an example, the interpretation of the terminology in this application is based on the definitions in the 3GPP specification protocol TS36 series.

[0006] As an example, the interpretation of terms in this application is based on the definitions in the 3GPP specification protocol TS38 series.

[0007] As an example, the interpretation of terms in this application is based on the definitions in the 3GPP specification protocol TS37 series.

[0008] As an example, the interpretation of terms in this application is based on the definitions in the IEEE (Institute of Electrical and Electronics Engineers) specification protocols.

[0009] It should be noted that, unless otherwise specified, the embodiments and features in any node of this application can be applied to any other node. Furthermore, unless otherwise specified, the embodiments and features in any embodiment of this application can be arbitrarily combined with each other.

[0010] This application discloses a method used in a first node of wireless communication, characterized by comprising:

[0011] Receive first signaling, the first signaling being used for mobility control, the first signaling being used to indicate at least a first target cell and a second target cell;

[0012] Perform a first handshake procedure for the first target cell; perform a second handshake procedure for the second target cell; determine whether to initiate an RRC connection re-establishment procedure based on whether at least one of the first or second handshake procedures is successfully completed.

[0013] Wherein, at least the first handshake process or the second handshake process is used for primary cell handover; the start time of the first handshake process is not later than the start time of the second handshake process; the behavior of determining whether to initiate an RRC connection re-establishment process based on whether at least one of the first handshake process or the second handshake process is successfully completed includes: if either the first handshake process or the second handshake process is not successfully completed, it is used to determine to initiate the RRC connection re-establishment process; if at least one of the first handshake process or the second handshake process is successfully completed, it is used to determine not to initiate the RRC connection re-establishment process.

[0014] As an example, the problems to be solved by this application include: the execution of the RRC connection re-establishment process will cause a long data interruption, and when the UE handover fails, how to shorten the interruption latency needs to be enhanced.

[0015] As an example, the problem this application aims to solve includes: how to improve the handover success rate.

[0016] As an example, the problem this application aims to solve includes: how to reduce the frequency of RRC connection re-establishment.

[0017] As an example, the features of the above method include: initiating the RRC connection re-establishment process only if either the first handshake process or the second handshake process fails to be completed successfully.

[0018] As an example, the features of the above method include: initiating the RRC connection re-establishment process only when the first handshake process fails to complete successfully and the second handshake process fails to complete successfully.

[0019] As an example, the characteristics of the above method include: during the time interval between the initiation of the first handshake process and the initiation of the second handshake process, the first node does not initiate an RRC connection re-establishment process.

[0020] As an example, the advantages of the above method include: increasing the probability of successful handover.

[0021] As an example, the advantages of the above method include: avoiding RRC connection re-establishment.

[0022] As an example, the advantages of the above method include: reducing interruption latency.

[0023] As an example, the UE performs the first handshake process and the second handshake process simultaneously.

[0024] As an example, if the UE fails to execute the first handshake process, it initiates the second handshake process.

[0025] As an example, both the first handshake process and the second handshake process are used for primary cell handover.

[0026] As one example, the second handshake process is used for recovery in case the first handshake process fails.

[0027] As an example, both the first target cell and the second target cell are target PCells (Primary Cells).

[0028] As an example, the first target cell is the target PCell, and the second target cell is a serving cell in the source SCG (Secondary Cell Group).

[0029] As an example, the first target cell is the target PCell, and the second target cell is the target PSCell (Primary SCG CEL1).

[0030] As an example, the first target cell is the target PCcell, and the second target cell is the source PSCell.

[0031] According to one aspect of this application, the first handshake process includes:

[0032] Transmit a first wireless signal on the first target cell;

[0033] Monitor the second wireless signal on the first target cell;

[0034] Wherein, the first wireless signal is used to trigger the second wireless signal; whether the second wireless signal is received is used to determine whether the first handshake process is successfully completed; the receipt of the second wireless signal is used to determine that the first handshake process is successfully completed, and the non-receipt of the second wireless signal is used to determine that the first handshake process is not successfully completed; the first wireless signal includes at least a random access preamble.

[0035] According to one aspect of this application, it is characterized by comprising:

[0036] As the primary cell handover is initiated, a first timer is started; the second radio signal is received during the operation of the first timer and used to determine that the first handshake process has been successfully completed; the expiration of the first timer is used to determine that the first handshake process has not been successfully completed.

[0037] According to one aspect of this application, the second handshake process includes:

[0038] Send the first message on the second target cell;

[0039] In response to the sending of the first message, monitor the second message;

[0040] In this process, whether the second message is received is used to determine whether the second handshake process has been successfully completed; the receipt of the second message is used to determine that the second handshake process has been successfully completed, and the non-receipt of the second message is used to determine that the second handshake process has not been successfully completed.

[0041] According to one aspect of this application, it is characterized by comprising:

[0042] Along with the first message, a second timer is started; the second message received during the operation of the second timer is used to determine that the second handshake process has been successfully completed; the expiration of the second timer is used to determine that the second handshake process has not been successfully completed.

[0043] According to one aspect of this application, the first message and the second message are both RRC layer signaling; the first message includes at least a measurement report.

[0044] According to one aspect of this application, the first message is physical layer signaling; the first message includes at least a random access preamble.

[0045] According to one aspect of this application, the failure of the first handshake process to be successfully completed is used to trigger the first message.

[0046] According to one aspect of this application, it is characterized by comprising:

[0047] In response to the successful completion of the first handshake process, a second signaling is sent, which is used to confirm that the primary cell handover has been successfully completed.

[0048] According to one aspect of this application, the second signaling is used to trigger a handover success message; the handover success message is used to notify that the handover of the primary cell has been successfully completed.

[0049] According to one aspect of this application, the handover success message is used to trigger a secondary node release request message; the release request message is used to trigger a secondary node release request confirmation message; and the first field in the secondary node release request message is used to indicate the primary cell handover.

[0050] According to one aspect of this application, it is characterized by comprising:

[0051] As a response to the successful completion of the second handshake process, the target process is executed.

[0052] According to one aspect of this application, the handover request message is used to trigger a handover request confirmation message; the handover request confirmation message is used to trigger the first signaling.

[0053] According to one aspect of this application, the switching request message is used to trigger a secondary node add request message; the secondary node add request message is used to trigger a secondary node add request confirmation message; and the secondary node add request confirmation message is used to trigger the switching request confirmation message.

[0054] This application discloses a method used in a second node for wireless communication, characterized by comprising:

[0055] Send a first signaling message, the first signaling message being used for mobility control, the first signaling message being used to indicate at least a first target cell and a second target cell;

[0056] The process includes: a first handshake procedure is performed for the first target cell; a second handshake procedure is performed for the second target cell; whether at least one of the first or second handshake procedures is successfully completed is used to determine whether an RRC connection re-establishment procedure is initiated; at least the first or second handshake procedure is used for primary cell handover; the start time of the first handshake procedure is not later than the start time of the second handshake procedure; the behavior of determining whether to initiate an RRC connection re-establishment procedure based on whether at least one of the first or second handshake procedures is successfully completed includes: either the first or second handshake procedure is not successfully completed, which is used to determine whether to initiate the RRC connection re-establishment procedure; or at least one of the first or second handshake procedures is successfully completed, which is used to determine whether to initiate the RRC connection re-establishment procedure.

[0057] According to one aspect of this application, it is characterized by comprising:

[0058] Send a handover request message;

[0059] Receive handover request confirmation message;

[0060] The handover request message is used to trigger the handover request confirmation message; the handover request confirmation message is used to trigger the first signaling.

[0061] According to one aspect of this application, the switching request message is used to trigger a secondary node add request message; the secondary node add request message is used to trigger a secondary node add request confirmation message; and the secondary node add request confirmation message is used to trigger the switching request confirmation message.

[0062] According to one aspect of this application, it is characterized by comprising:

[0063] Send a secondary node release request message, the first field of which is used to indicate the handover of the primary cell;

[0064] In response to the sending of the secondary node release request message, a secondary node release request confirmation message is received.

[0065] According to one aspect of this application, it is characterized by comprising:

[0066] Receive a handover success message; the handover success message is used to trigger the secondary node release request message; the handover success message is used to notify the primary cell that the handover has been successfully completed.

[0067] According to one aspect of this application, a second signaling is sent as a response to the successful completion of the first handshake process, the second signaling being used to confirm that the primary cell handover has been successfully completed; the second signaling being used to trigger the handover success message.

[0068] According to one aspect of this application, the first handshake process includes: a first radio signal being transmitted on the first target cell; a second radio signal being monitored on the first target cell; the first radio signal being used to trigger the second radio signal; whether the second radio signal is received being used to determine whether the first handshake process has been successfully completed; the second radio signal being received being used to determine that the first handshake process has been successfully completed, and the second radio signal not being received being used to determine that the first handshake process has not been successfully completed; the first radio signal includes at least a random access preamble.

[0069] According to one aspect of this application, a first timer is started as the primary cell handover is initiated; a second radio signal is received during the operation of the first timer to determine that the first handshake process has been successfully completed; and the expiration of the first timer is used to determine that the first handshake process has not been successfully completed.

[0070] According to one aspect of this application, the second handshake process includes: a first message being sent on the second target cell; a second message being monitored in response to the sending of the first message; whether the second message is received is used to determine whether the second handshake process has been successfully completed; the receipt of the second message is used to determine that the second handshake process has been successfully completed, and the non-receipt of the second message is used to determine that the second handshake process has not been successfully completed.

[0071] According to one aspect of this application, a second timer is started along with the first message; the second message is received during the operation of the second timer and used to determine that the second handshake process has been successfully completed; the expiration of the second timer is used to determine that the second handshake process has not been successfully completed.

[0072] According to one aspect of this application, the target process is executed in response to the successful completion of the second handshake process.

[0073] According to one aspect of this application, it is characterized by comprising:

[0074] The second receiver receives the third message;

[0075] The second transmitter sends the fourth message;

[0076] Wherein, the first message triggers the third message; the third message triggers the fourth message; the fourth message triggers the second message; the third message includes the first message; and the fourth message includes the second message.

[0077] This application discloses a method used in a third node for wireless communication, characterized by comprising:

[0078] Receive handover request messages;

[0079] Send a handover request confirmation message;

[0080] In this process, a first signaling message is sent, which is used for mobility control and to indicate at least a first target cell and a second target cell; a first handshake process is executed, which is directed to the first target cell; a second handshake process is executed, which is directed to the second target cell; whether at least one of the first handshake process or the second handshake process is successfully completed is used to determine whether an RRC connection re-establishment process is initiated; at least the first handshake process or the second handshake process is used for primary cell handover; the start time of the first handshake process is not later than the start time of the second handshake process; the behavior of determining whether to initiate an RRC connection re-establishment process based on whether at least one of the first handshake process or the second handshake process is successfully completed includes: either the first handshake process or the second handshake process is not successfully completed, which is used to determine whether to initiate the RRC connection re-establishment process; either the first handshake process or the second handshake process is successfully completed, which is used to determine whether to initiate the RRC connection re-establishment process; the handover request message is used to trigger the handover request confirmation message; the handover request confirmation message is used to trigger the first signaling message.

[0081] According to one aspect of this application, it is characterized by comprising:

[0082] In response to the receipt of the switching request message, a secondary node add request message is sent;

[0083] As a response to the sending of the auxiliary node add request message, a secondary node add request confirmation message is received;

[0084] The auxiliary node addition request confirmation message is used to trigger the switch request confirmation message.

[0085] According to one aspect of this application, it is characterized by comprising:

[0086] Monitor the first wireless signal;

[0087] Whether to send a second wireless signal is determined based on whether the first wireless signal is received;

[0088] Wherein, the first wireless signal is used to trigger the second wireless signal; whether the second wireless signal is received is used to determine whether the first handshake process is successfully completed; the receipt of the second wireless signal is used to determine that the first handshake process is successfully completed, and the non-receipt of the second wireless signal is used to determine that the first handshake process is not successfully completed; the first wireless signal includes at least a random access preamble.

[0089] According to one aspect of this application, it is characterized by comprising:

[0090] Receive the second signaling; the second signaling is used to confirm that the primary cell handover was successfully completed.

[0091] According to one aspect of this application, it is characterized by comprising:

[0092] In response to the receipt of the second signaling, a handover success message is sent; the handover success message is used to notify that the handover of the primary cell has been successfully completed.

[0093] According to one aspect of this application, the handover success message is used to trigger a secondary node release request message; the release request message is used to trigger a secondary node release request confirmation message; and the first field in the secondary node release request message is used to indicate the primary cell handover.

[0094] According to one aspect of this application, the second handshake process includes: a first message being sent on the second target cell; a second message being monitored in response to the sending of the first message; whether the second message is received is used to determine whether the second handshake process has been successfully completed; the receipt of the second message is used to determine that the second handshake process has been successfully completed, and the non-receipt of the second message is used to determine that the second handshake process has not been successfully completed.

[0095] According to one aspect of this application, it is characterized by comprising:

[0096] The third receiver receives the third message;

[0097] The third transmitter sends a fourth message;

[0098] Wherein, the first message triggers the third message; the third message triggers the fourth message; the fourth message triggers the second message; the third message includes the first message; and the fourth message includes the second message.

[0099] This application discloses a method for use in a fourth node of wireless communication, characterized by comprising:

[0100] Monitor first messages;

[0101] Whether to send a second message depends on whether the first message has been received;

[0102] In this process, a first signaling message is sent and used for mobility control, indicating at least a first target cell and a second target cell; a first handshake process is executed for the first target cell; a second handshake process is executed for the second target cell; whether at least one of the first or second handshake process is successfully completed is used to determine whether an RRC connection re-establishment process is initiated; at least the first or second handshake process is used for primary cell handover; the start time of the first handshake process is not later than the start time of the second handshake process; the behavior of determining whether to initiate an RRC connection re-establishment process based on whether at least one of the first or second handshake process is successfully completed includes: either the first or second handshake process is not successfully completed, used to determine that the RRC connection re-establishment process is initiated; either the first or second handshake process is successfully completed, used to determine that the RRC connection re-establishment process is not initiated; whether a second message is received is used to determine whether the second handshake process is successfully completed; the second message being received is used to determine that the second handshake process is successfully completed, and the second message not being received is used to determine that the second handshake process is not successfully completed.

[0103] According to one aspect of this application, the handover request message is used to trigger a handover request confirmation message; the handover request confirmation message is used to trigger the first signaling.

[0104] According to one aspect of this application, it is characterized by comprising:

[0105] Receive requests to add secondary nodes;

[0106] In response to the receipt of the secondary node add request message, a secondary node add request confirmation message is sent; the switch request message is used to trigger the secondary node add request message; the secondary node add request confirmation message is used to trigger the switch request confirmation message.

[0107] According to one aspect of this application, it is characterized by comprising:

[0108] Receive a secondary node release request message, wherein the first field in the secondary node release request message is used to indicate the handover of the primary cell;

[0109] In response to the receipt of the secondary node release request message, a secondary node release request confirmation message is sent.

[0110] According to one aspect of this application, the handover success message is used to trigger the secondary node release request message; a second signaling is used to trigger the handover success message; the handover success message is used to notify that the primary cell handover has been successfully completed; and the second signaling is used to confirm that the primary cell handover has been successfully completed.

[0111] According to one aspect of this application, it is characterized by comprising:

[0112] In response to the receipt of the first message, a third message is sent;

[0113] In response to the sending of the third message, a fourth message is received;

[0114] Wherein, the first message triggers the third message; the third message triggers the fourth message; the fourth message triggers the second message; the third message includes the first message; and the fourth message includes the second message.

[0115] This application discloses a first node used for wireless communication, characterized in that it comprises:

[0116] A first receiver receives a first signaling message, the first signaling message being used for mobility control, and the first signaling message being used to indicate at least a first target cell and a second target cell;

[0117] The first transceiver performs a first handshake process for the first target cell; performs a second handshake process for the second target cell; and determines whether to initiate an RRC connection re-establishment process based on whether at least one of the first or second handshake processes is successfully completed.

[0118] Wherein, at least the first handshake process or the second handshake process is used for primary cell handover; the start time of the first handshake process is not later than the start time of the second handshake process; the behavior of determining whether to initiate an RRC connection re-establishment process based on whether at least one of the first handshake process or the second handshake process is successfully completed includes: if either the first handshake process or the second handshake process is not successfully completed, it is used to determine to initiate the RRC connection re-establishment process; if at least one of the first handshake process or the second handshake process is successfully completed, it is used to determine not to initiate the RRC connection re-establishment process.

[0119] This application discloses a second node used for wireless communication, characterized in that it comprises:

[0120] The second transmitter sends a first signaling message, which is used for mobility control and is used to indicate at least a first target cell and a second target cell.

[0121] The process includes: a first handshake procedure is performed for the first target cell; a second handshake procedure is performed for the second target cell; whether at least one of the first or second handshake procedures is successfully completed is used to determine whether an RRC connection re-establishment procedure is initiated; at least the first or second handshake procedure is used for primary cell handover; the start time of the first handshake procedure is not later than the start time of the second handshake procedure; the behavior of determining whether to initiate an RRC connection re-establishment procedure based on whether at least one of the first or second handshake procedures is successfully completed includes: either the first or second handshake procedure is not successfully completed, which is used to determine whether to initiate the RRC connection re-establishment procedure; or at least one of the first or second handshake procedures is successfully completed, which is used to determine whether to initiate the RRC connection re-establishment procedure.

[0122] This application discloses a third node used for wireless communication, characterized in that it comprises:

[0123] The third receiver receives the handover request message;

[0124] The third transmitter sends a handover request confirmation message;

[0125] In this process, a first signaling message is sent, which is used for mobility control and to indicate at least a first target cell and a second target cell; a first handshake process is executed, which is directed to the first target cell; a second handshake process is executed, which is directed to the second target cell; whether at least one of the first handshake process or the second handshake process is successfully completed is used to determine whether an RRC connection re-establishment process is initiated; at least the first handshake process or the second handshake process is used for primary cell handover; the start time of the first handshake process is not later than the start time of the second handshake process; the behavior of determining whether to initiate an RRC connection re-establishment process based on whether at least one of the first handshake process or the second handshake process is successfully completed includes: either the first handshake process or the second handshake process is not successfully completed, which is used to determine whether to initiate the RRC connection re-establishment process; either the first handshake process or the second handshake process is successfully completed, which is used to determine whether to initiate the RRC connection re-establishment process; the handover request message is used to trigger the handover request confirmation message; the handover request confirmation message is used to trigger the first signaling message.

[0126] This application discloses a fourth node used for wireless communication, characterized in that it comprises:

[0127] The fourth receiver monitors the first message;

[0128] The fourth transmitter determines whether to send the second message based on whether the first message has been received;

[0129] In this process, a first signaling message is sent and used for mobility control, indicating at least a first target cell and a second target cell; a first handshake process is executed for the first target cell; a second handshake process is executed for the second target cell; whether at least one of the first or second handshake process is successfully completed is used to determine whether an RRC connection re-establishment process is initiated; at least the first or second handshake process is used for primary cell handover; the start time of the first handshake process is not later than the start time of the second handshake process; the behavior of determining whether to initiate an RRC connection re-establishment process based on whether at least one of the first or second handshake process is successfully completed includes: either the first or second handshake process is not successfully completed, used to determine that the RRC connection re-establishment process is initiated; either the first or second handshake process is successfully completed, used to determine that the RRC connection re-establishment process is not initiated; whether a second message is received is used to determine whether the second handshake process is successfully completed; the second message being received is used to determine that the second handshake process is successfully completed, and the second message not being received is used to determine that the second handshake process is not successfully completed.

[0130] As an example, compared with conventional solutions, this application has the following advantages:

[0131] - Increase the probability of successful switching;

[0132] - Avoid RRC connection re-establishment;

[0133] -. Reduce interruption latency. Attached Figure Description

[0134] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0135] Figure 1 A flowchart illustrating the transmission of first signaling according to an embodiment of this application is shown;

[0136] Figure 2 A schematic diagram of a network architecture according to an embodiment of this application is shown;

[0137] Figure 3 A schematic diagram of an embodiment of a wireless protocol architecture for the user plane and control plane according to an embodiment of this application is shown;

[0138] Figure 4A schematic diagram of a first communication device and a second communication device according to an embodiment of this application is shown;

[0139] Figure 5 A flowchart illustrating a wireless signal transmission process according to an embodiment of this application is shown;

[0140] Figure 6 A flowchart illustrating the wireless signal transmission process of a first handshake according to an embodiment of this application is shown;

[0141] Figure 7 A flowchart illustrating the wireless signal transmission process of a second handshake according to an embodiment of this application is shown;

[0142] Figure 8 A flowchart illustrating the wireless signal transmission of a first signaling according to an embodiment of this application is shown;

[0143] Figure 9 A flowchart illustrating the wireless signal transmission of a first signaling according to another embodiment of this application is shown;

[0144] Figure 10 A flowchart illustrating the wireless signal transmission process in which the first handshake process is successfully completed according to an embodiment of this application is shown.

[0145] Figure 11 A flowchart illustrating the successful completion of a second handshake process according to an embodiment of this application is shown;

[0146] Figure 12 A flowchart illustrating a first handshake process or either a second handshake process according to an embodiment of this application is shown.

[0147] Figure 13 A structural block diagram of a processing apparatus for a first node according to an embodiment of this application is shown;

[0148] Figure 14 A structural block diagram of a processing apparatus for a second node according to an embodiment of this application is shown;

[0149] Figure 15 A structural block diagram of a processing apparatus for a third node according to an embodiment of this application is shown;

[0150] Figure 16 A structural block diagram of a processing apparatus for a fourth node according to an embodiment of this application is shown;

[0151] Figure 17 A flowchart of the third and fourth messages according to an embodiment of this application is shown. Detailed Implementation

[0152] The technical solution of this application will be further described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0153] Example 1

[0154] Example 1 illustrates a flowchart of the transmission of first signaling according to an embodiment of this application, as shown in the attached diagram. Figure 1 As shown. (Attached) Figure 1 In the diagram, each box represents a step. It is particularly important to emphasize that the order of the boxes in the diagram does not represent the chronological order of the steps they represent.

[0155] In Embodiment 1, the first node in this application receives first signaling in step 101. The first signaling is used for mobility control and is used to indicate at least a first target cell and a second target cell. In step 102, a first handshake process is performed for the first target cell. A second handshake process is performed for the second target cell. In step 103, it is determined whether to initiate an RRC connection re-establishment process based on whether at least one of the first handshake process or the second handshake process has been successfully completed. The first handshake process or at least the first handshake process is used for primary cell handover. The start time of the first handshake process is not later than the start time of the second handshake process. The action of determining whether to initiate an RRC connection re-establishment process based on whether at least one of the first handshake process or the second handshake process has been successfully completed includes: either the first handshake process or the second handshake process has failed to complete successfully, which is used to determine whether to initiate the RRC connection re-establishment process; or either the first handshake process or the second handshake process has been successfully completed, which is used to determine whether to initiate the RRC connection re-establishment process.

[0156] As one example, the mobility control includes switching.

[0157] As one embodiment, the mobility control includes the primary cell handover.

[0158] As an example, the primary cell refers to the primary cell of the Master Cell Group (MCG).

[0159] As an example, the primary cell handover refers to switching the source PCell of the first node to the target PCell.

[0160] As one example, the sender of the first signaling is the sustaining base station of a serving cell of the first node.

[0161] As an example, the sender of the first signaling is the sustaining base station of the source PCell.

[0162] As an example, the sender of the first signaling is the sustaining base station of the source PSCell.

[0163] As an example, the sender of the first signaling is the second node in this application.

[0164] As an example, the sender of the first signaling is the sustaining base station of the first cell, and the first cell is the source PCell.

[0165] As an example, the sustaining base station of the source PCell is the source MN (Master Node).

[0166] As an example, the sustaining base station of the source PCell is a source M-NG-RAN (Master NG-RAN) node.

[0167] As an example, the sustaining base station of the source PCell is a source NG-RAN node.

[0168] As an example, the definition of M-NG-RAN is referenced in TS 38.423.

[0169] As an example, the definition of S-NG-RAN is referenced in TS 38.423.

[0170] As an example, the definition of NG-RAN is referenced in TS 38.423.

[0171] As one example, the first signaling indicates the second target cell.

[0172] As one example, the first signaling indicates the second target cell.

[0173] As one embodiment, the first signaling includes the identifier of the second target cell.

[0174] As one embodiment, the first signaling includes the PCI (Physical Cell Identifier) ​​of the second target cell.

[0175] As one embodiment, the first signaling includes the configuration of the second target cell.

[0176] As an example, the first signaling implicitly indicates the second target cell.

[0177] As an example, the first signaling indicates that the first domain source SCG has not been released; the second target cell is the source PSCell in the source SCG.

[0178] As an example, the first field of the first signaling indicates that the source SCG has not been released; the second target cell is a serving cell in the source SCG.

[0179] As an example, the first field of the first signaling indicates that the resources between the sustaining base station of the source PCell and the sustaining base station of the source PSCell associated with the first node have not been released; the second target cell is the source PSCell.

[0180] As an example, the first field of the first signaling indicates that the second handshake process is allowed to be executed; the second handshake process is for the second target cell.

[0181] As an example, the first field of the first signaling indicates that the second target cell can be used to perform handover failure recovery; the second target cell is the source PSCell in the source SCG.

[0182] As an example, the first field of the first signaling indicates that the source SCG can be used to perform handover failure recovery; the second target cell is the source PSCell in the source SCG.

[0183] As an example, the first field indicating the source SCG of the first signaling can be used to perform handover failure recovery; the second target cell is a serving cell in the source SCG.

[0184] As one embodiment, the first signaling includes a first field, which is used to indicate the second target cell.

[0185] As one example, the first signaling is used to indicate that the second target cell has not been released.

[0186] As one embodiment, the first signaling includes a first field used to indicate that the second target cell has not been released.

[0187] As an example, setting the first field in the first signaling to true is used to indicate that the second target cell has not been released.

[0188] As an example, the first signaling includes at least one RRC field whose name contains "reconfigurationWithSync".

[0189] As an example, the first signaling includes at least one RRC field whose name contains SpCellConfig.

[0190] As an example, the first signaling includes at least one RRC IE whose name contains CellGroupConfig.

[0191] As an example, the first signaling includes at least one RRC field whose name contains masterCellGroup.

[0192] As an example, the first signaling includes at least one RRC field whose name contains "secondaryCellGroup".

[0193] As an example, the first signaling includes at least one RRC field whose name contains mrdc-SecondaryCellGroup.

[0194] As an example, the first signaling includes at least one RRC field whose name contains nr-SCG.

[0195] As an example, the first signaling includes at least one RRC field whose name contains mrdc-SecondaryCellGroupConfig.

[0196] As an example, the first signaling includes at least one RRC field whose name contains masterCellGroup and one RRC field whose name contains mrdc-SecondaryCellGroup.

[0197] As an example, the RRC field containing "reconfigurationWithSync" in the name of the first signaling is used to indicate the first target cell.

[0198] As a sub-example of this embodiment, the RRC field whose name contains reconfigurationWithSync belongs to the RRC field whose name contains masterCellGroup.

[0199] As one example, the first signaling indicates the first target cell.

[0200] As a sub-implementation of this embodiment, the first signaling includes parameters for synchronous reconfiguration to the first target cell.

[0201] As a sub-implementation of this embodiment, the first signaling includes an RRC field, which indicates parameters for synchronous reconfiguration to the first target cell, and the name of the RRC field includes reconfigurationWithSync.

[0202] As a sub-implementation of this embodiment, the first signaling includes an RRC field, the name of which includes SpCellConfig.

[0203] As one example, the first signaling indicates the second target cell.

[0204] As a sub-implementation of this embodiment, the first signaling includes parameters for synchronous reconfiguration to the second target cell.

[0205] As a sub-implementation of this embodiment, the first signaling includes an RRC field, which indicates parameters for synchronous reconfiguration to the second target cell, and the name of the RRC field includes reconfigurationWithSync.

[0206] As one embodiment, the first signaling includes parameters for synchronous reconfiguration to the first target cell and the first signaling also includes parameters for synchronous reconfiguration to the second target cell.

[0207] As one embodiment, the first signaling includes parameters for synchronous reconfiguration to the first target cell, and the first signaling does not include parameters for synchronous reconfiguration to the second target cell.

[0208] As an example, the first target cell is the target PCell.

[0209] As an example, the first target cell is the primary cell in the target MCG.

[0210] As an example, the first target cell is a CHO (Conditional Handover) candidate cell, and the definition of CHO refers to 3GPP TS 38.331 or 3GPP TS 36.331.

[0211] As an example, the first target cell is a CHO candidate cell configured for the first cell.

[0212] As an example, the first target cell is a conditional reconfiguration candidate cell configured for the first cell.

[0213] As an example, the second target cell is the source PSCell.

[0214] As an example, the second target cell is the primary cell in the source SCG.

[0215] As an example, the second target cell is any cell in the source SCG.

[0216] As an example, the second target cell is a secondary cell in the source SCG.

[0217] As an example, the second target cell is the target PSCell.

[0218] As an example, the second target cell is the target PCell.

[0219] As an example, the second target cell is the primary cell in the target SCG.

[0220] As an example, the second target cell is any cell in the target SCG.

[0221] As an example, the second target cell is a secondary cell in the target SCG.

[0222] As an example, the second target cell is a CHO candidate cell.

[0223] As an example, the second target cell is a CHO candidate cell configured for the first cell.

[0224] As an example, the second target cell is a conditional reconfiguration candidate cell configured for the first cell.

[0225] As an example, the first target cell is a target cell for handover, and the second target cell is a CHO candidate cell.

[0226] As an example, the first target cell is a target cell for handover, and the second target cell is another target cell for handover.

[0227] As an example, the first target cell is a CHO candidate cell, and the second target cell is another CHO candidate cell.

[0228] As an example, the first target cell is the target PCell, and the second target cell is the target PCell.

[0229] As an example, the first target cell is the target PCell, and the second target cell is the target PSCell.

[0230] As an example, the first target cell is the target PCcell, and the second target cell is the source PSCell.

[0231] As one embodiment, the first handshake process includes sending at least one message to the sustaining base station of the first target cell and receiving a message sent by the sustaining base station of the first target cell to the first node.

[0232] As an example, the first handshake process includes sending at least one message on the first target cell and receiving an acknowledgment message for the message in the first target cell.

[0233] As one embodiment, the second handshake process includes sending at least one message on the second target cell and receiving an acknowledgment message for the one message in the second target cell.

[0234] As one embodiment, the second handshake process includes sending at least one message to the sustaining base station of the second target cell and receiving a message sent by the sustaining base station of the second target cell to the first node.

[0235] As one embodiment, the action of performing the first handshake process includes the action of initiating the first handshake process.

[0236] As one embodiment, the action of performing the second handshake process includes the action of initiating the second handshake process.

[0237] As one example, the first handshake process is initiated in response to the receipt of the first signaling.

[0238] As an example, in response to the fulfillment of the first execution condition, the first handshake process is initiated; the first signaling indicates the first execution condition, which is a triggering condition for applying the candidate configuration of the first target cell.

[0239] As one example, in response to the receipt of the first signaling, the first handshake process is initiated and the second handshake process is initiated.

[0240] As an example, in response to the satisfaction of the first execution condition and the second execution condition, the first handshake process is initiated and the second handshake process is initiated; the first signaling indicates the first execution condition and the second execution condition, wherein the first execution condition is a triggering condition for applying the candidate configuration of the first target cell, and the second execution condition is a triggering condition for applying the candidate configuration of the second target cell.

[0241] As an example, the successful completion of the first handshake process means that the primary cell handover is successful.

[0242] As an example, the first handshake process being successfully completed means that the random access process for the first target cell is successfully completed.

[0243] As an example, the first handshake process being successfully completed means that the random access process for the first target cell is successfully completed before the first timer expires.

[0244] As an example, the first handshake process being successfully completed means that the random access process for the first target cell is successfully completed before the first timer expires.

[0245] As one embodiment, the behavior of determining whether to initiate an RRC connection re-establishment process based on whether at least one of the first handshake process or the second handshake process is successfully completed includes: whether at least one of the first handshake process or the second handshake process is successfully completed is used to determine whether to initiate an RRC connection re-establishment process.

[0246] As one embodiment, the behavior of determining whether to initiate an RRC connection re-establishment process based on whether at least one of the first handshake process or the second handshake process is successfully completed includes: determining whether to initiate an RRC connection re-establishment process based on whether the first handshake process is successfully completed and whether the second handshake process is successfully completed.

[0247] As one embodiment, the behavior of determining whether to initiate an RRC connection re-establishment process based on whether at least one of the first handshake process or the second handshake process is successfully completed includes: whether the first handshake process is successfully completed and whether the second handshake process is successfully completed are both used to determine whether to initiate an RRC connection re-establishment process.

[0248] As an example, the RRC connection re-establishment process is used to rebuild the RRC connection.

[0249] As an example, the RRC connection re-establishment process is used to continue the RRC connection.

[0250] As an example, the RRC connection re-establishment process is used to rebuild SRB1 (Signaling Radio Bearer 1).

[0251] As an example, the RRC connection re-establishment process is used to establish SRB1.

[0252] As an example, the first handshake process belongs to the handover of the primary cell.

[0253] As an example, the second handshake process is part of the primary cell handover.

[0254] As an example, the second handshake process is not part of the primary cell handover.

[0255] As an example, the first handshake process belongs to the primary cell handover, and the second handshake process belongs to the primary cell handover.

[0256] As an example, the first handshake process belongs to the primary cell handover, while the second handshake process does not belong to the primary cell handover.

[0257] As an example, the phrase "the start time of the first handshake process is not later than the start time of the second handshake process" includes: the second handshake process begins to be executed when the first handshake process begins to be executed.

[0258] As an example, the phrase "the start time of the first handshake process is not later than the start time of the second handshake process" includes: when the first handshake process begins to be executed, the second handshake process has not yet been executed.

[0259] As an example, the phrase "the start time of the first handshake process is not later than the start time of the second handshake process" includes: the time when the first handshake process is initialized is not later than the time when the second handshake process is initialized.

[0260] As an example, the phrase "the start time of the first handshake process is not later than the start time of the second handshake process" includes: the start time of the first handshake process is earlier than the start time of the second handshake process.

[0261] As one embodiment, the phrase "the start time of the first handshake process is not later than the start time of the second handshake process" includes: the failure of the first handshake process to be successfully completed being used to trigger the second handshake process.

[0262] As an example, the phrase "the start time of the first handshake process is not later than the start time of the second handshake process" includes: if the first handshake process is not successfully completed, initiating the second handshake process.

[0263] As an example, the sentence "The failure of either the first handshake process or the second handshake process is used to determine that the RRC connection re-establishment process is initiated; the successful completion of at least one of the first handshake process or the second handshake process is used to determine that the RRC connection re-establishment process is not initiated" means that the RRC connection re-establishment process is initiated only when either the first handshake process or the second handshake process is unsuccessfully completed.

[0264] As one embodiment, the phrase "the failure of either the first handshake process or the second handshake process to determine the initiation of the RRC connection re-establishment process" includes: the failure of both the first handshake process and the second handshake process to determine the initiation of the RRC connection re-establishment process.

[0265] As one embodiment, the phrase "the failure of either the first handshake process or the second handshake process to determine the initiation of the RRC connection re-establishment process" includes: the failure of both the first handshake process and the second handshake process to determine the initiation of the RRC connection re-establishment process.

[0266] As one embodiment, the phrase "the successful completion of at least one of the first handshake process or the second handshake process is used to determine not to initiate the RRC connection re-establishment process" includes: the successful completion of either the first handshake process or the second handshake process is used to determine not to initiate the RRC connection re-establishment process.

[0267] As an example, "not initiating the RRC connection re-establishment process" means that the RRC connection re-establishment process is not triggered.

[0268] As an example, "not initiating the RRC connection re-establishment process" means that the RRC connection re-establishment process is not executed.

[0269] As an example, the RRC field whose name contains xxx in this application refers to the xxx field.

[0270] As an example, the RRC fields containing xxx in the name mentioned in this application refer to: xxx-r8 field, or xxx-r9 field, or xxx-r10 field, or xxx-r11 field, or xxx-r12 field, or xxx-r13 field, or xxx-r4 field, or xxx-r15 field, or xxx-r16 field, or xxx-r17 field, or xxx-r18 field, or xxx-r19 field, or xxx-r20 field, or xxx-r21 field, or xxx-r22 field, or xxx-r23 field, or xxx-r24 field, ..., etc.

[0271] As an example, the RRC IE containing xxx in the name mentioned in this application refers to: xxx IE.

[0272] As an example, the RRC IEs containing xxx in the name mentioned in this application refer to: xxx-r8 IE, or xxx-r9 IE, or xxx-r10 IE, or xxx-r11 IE, or xxx-r12 IE, or xxx-r13 IE, or xxx-r4 IE, or xxx-r15 IE, or xxx-r16 IE, or xxx-r17 IE, or xxx-r18 IE, or xxx-r19 IE, or xxx-r20 IE, or xxx-r21 IE, or xxx-r22 IE, or xxx-r23 IE, or xxx-r24 IE, ..., etc.

[0273] Example 2

[0274] Example 2 illustrates a schematic diagram of a network architecture according to an embodiment of this application, as shown in the attached diagram. Figure 2 As shown. (Attached) Figure 2This describes the network architecture 200 of a 5G NR (New Radio) / LTE (Long-Term Evolution) / LTE-A (Long-Term Evolution Advanced) system. The 5G NR / LTE / LTE-A network architecture 200 can also be referred to as 5GS (5G System) / EPS (Evolved Packet System) 200, or some other suitable term. 5GS / EPS 200 includes at least one of UE (User Equipment) 201, RAN (Radio Access Network) 202, 5GC (5G Core Network) / EPC (Evolved Packet Core) 210, HSS (Home Subscriber Server) / UDM (Unified Data Management) 220, and Internet services 230. 5GS / EPS can interconnect with other access networks, but these entities / interfaces are not shown for simplicity. As shown in the figure, 5GS / EPS provides packet-switched services; however, those skilled in the art will readily understand that the various concepts presented throughout this application can be extended to networks providing circuit-switched services or other cellular networks. The RAN includes node 203 and other nodes 204 or 205. Node 203 provides user and control plane protocol termination to UE 201. Node 203 may be connected to other nodes 204 via an Xn interface (e.g., backhaul) / X2 interface. Node 203 may also be referred to as a base station, base transceiver station, radio base station, radio transceiver, transceiver function, basic service set (BSS), extended service set (ESS), TRP (transmitter-receiver node), or some other suitable term. Node 203 provides UE 201 with an access point to the 5GC / EPC 210. Examples of UE201 include cellular phones, smartphones, Session Initiation Protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, non-terrestrial base station communications, satellite mobile communications, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, drones, aircraft, narrowband IoT devices, machine-type communication devices, land vehicles, automobiles, wearable devices, or any other similar functional devices.Those skilled in the art may also refer to UE201 as a mobile station, subscriber station, mobile unit, subscriber unit, radio unit, remote unit, mobile device, radio device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, radio terminal, remote terminal, handheld device, user agent, mobile client, client, or any other suitable term. Node 203 is connected to 5GC / EPC210 via the S1 / NG interface. 5GC / EPC210 includes MME (Mobility Management Entity) / AMF (Authentication Management Field) / SMF (Session Management Function) 211, other MME / AMF / SMF 214, S-GW (Service Gateway) / UPF (User Plane Function) 212, and P-GW (Packet Data Network Gateway) / UPF 213. MME / AMF / SMF 211 is the control node that handles signaling between UE201 and 5GC / EPC210. In general, the MME / AMF / SMF211 provides bearer and connection management. All user IP (Internet Protocol) packets are transmitted through the S-GW / UPF212, which is itself connected to the P-GW / UPF213. The P-GW provides UE IP address allocation and other functions. The P-GW / UPF213 connects to Internet service 230. Internet service 230 includes operator-compliant Internet Protocol services, specifically including the Internet, intranet, IMS (IP Multimedia Subsystem), and packet-switched streaming services.

[0275] As an example, an Xn interface (e.g., backhaul) / X2 interface exists between node 204 and node 205, and node 204 can connect to other nodes 205 via the Xn interface (e.g., backhaul) / X2 interface.

[0276] As an example, the Xn interface (e.g., backhaul) / X2 interface between node 204 and node 205 does not exist.

[0277] As an example, an Xn interface (e.g., backhaul) / X2 interface exists between node 203 and node 205, and node 203 can connect to other nodes 205 via the Xn interface (e.g., backhaul) / X2 interface.

[0278] As an example, the Xn interface (e.g., backhaul) / X2 interface between node 203 and node 205 does not exist.

[0279] As an example, at least one of the Xn interface (e.g., backhaul) / X2 interface between node 204 and node 205 or the Xn interface (e.g., backhaul) / X2 interface between node 203 and node 205 exists.

[0280] As an example, the UE201 corresponds to the first node in this application.

[0281] As an example, node 203 corresponds to the second node in this application.

[0282] As an example, node 204 corresponds to the third node in this application.

[0283] As an example, node 205 corresponds to the fourth node in this application.

[0284] As an example, the UE201 corresponds to the first node in this application.

[0285] As an example, the UE201 is a user equipment (UE).

[0286] As an example, the UE241 corresponds to the second node in this application.

[0287] As an example, the UE241 is a user equipment.

[0288] As an example, node 203 is a base station (BS).

[0289] As one example, node 203 is a user equipment.

[0290] As an example, node 203 is a relay.

[0291] As one example, node 203 is a gateway.

[0292] As an example, node 204 is a base station device.

[0293] As one example, node 204 is a user equipment.

[0294] As an example, node 204 is a relay.

[0295] As an example, node 204 is a gateway.

[0296] As an example, node 205 is a base station device.

[0297] As one example, node 205 is a user equipment.

[0298] As an example, node 205 is a relay.

[0299] As one example, node 205 is a gateway.

[0300] As one example, the user equipment supports transmission over a non-terrestrial network (NTN).

[0301] As one example, the user equipment supports transmission over a non-terrestrial network (terrestrial network).

[0302] As an example, the user equipment supports transmission in networks with large latency differences.

[0303] As an example, the user equipment supports dual connection (DC) transmission.

[0304] As one embodiment, the user equipment includes a mobile terminal, or the user equipment includes an aircraft, or the user equipment includes a vehicle-mounted terminal, or the user equipment includes a ship, or the user equipment includes an Internet of Things (IoT) terminal, or the user equipment includes an Industrial Internet of Things (IIoT) terminal, or the user equipment includes a device supporting low-latency, high-reliability transmission, or the user equipment includes testing equipment, or the user equipment includes a signaling tester.

[0305] As one embodiment, the base station device is a BS, or the base station device is a Base Transceiver Station (BTS), or the base station device is a NodeB (NB), or the base station device is a gNB, or the base station device is an eNB, or the base station device is an ng-eNB, or the base station device is an en-gNB.

[0306] As one embodiment, the base station equipment includes testing equipment, or the base station equipment includes a signaling tester, or the base station equipment includes satellite equipment, or the base station equipment includes flight platform equipment, or the base station equipment includes a macrocell base station, or the base station equipment includes a microcell base station, or the base station equipment includes a picocell base station, or the base station equipment includes a femtocell.

[0307] As an example, the base station equipment supports transmission over non-terrestrial networks.

[0308] As one example, the base station equipment supports transmission in networks with large latency differences.

[0309] As one example, the base station equipment supports transmission over a terrestrial network.

[0310] As one embodiment, the base station equipment includes base station equipment that supports large latency differences.

[0311] As one embodiment, the base station equipment includes a TRP (Transmitter Receiver Point).

[0312] As one embodiment, the base station equipment includes a CU (Centralized Unit).

[0313] As one embodiment, the base station equipment includes a DU (Distributed Unit).

[0314] As one embodiment, the base station equipment includes an IAB (Integrated Access and Backhaul) node.

[0315] As one example, the base station equipment includes an IAB-donor.

[0316] As one embodiment, the base station equipment includes IAB-donor-CU.

[0317] As one embodiment, the base station equipment includes IAB-donor-DU.

[0318] As one embodiment, the base station equipment includes an IAB-DU.

[0319] As one example, the base station equipment includes IAB-MT.

[0320] As one embodiment, the relay includes an L3 relay.

[0321] As one embodiment, the relay includes an L2 relay.

[0322] As one example, the relay includes a router.

[0323] As one example, the relay includes a switch.

[0324] As one embodiment, the relay includes user equipment.

[0325] As one example, the relay includes base station equipment.

[0326] Example 3

[0327] Example 3 illustrates a schematic diagram of an embodiment of a wireless protocol architecture for a user plane and a control plane according to this application, as shown in the attached diagram. Figure 3 As shown. Figure 3 This is a schematic diagram illustrating an embodiment of a radio protocol architecture for the user plane 350 and the control plane 300. Figure 3The radio protocol architecture for control plane 300 is illustrated using three layers: Layer 1, Layer 2, and Layer 3. Layer 1 (L1 layer) is the lowest layer and implements various PHY (Physical Layer) signal processing functions. L1 layer will be referred to as PHY301 in this document. Layer 2 (L2 layer) 305 sits above PHY301 and includes the MAC (Medium Access Control) sublayer 302, the RLC (Radio Link Control) sublayer 303, and the PDCP (Packet Data Convergence Protocol) sublayer 304. The PDCP sublayer 304 provides multiplexing between different radio bearers and logical channels. It also provides security through encrypted packets and cross-area mobility support. The RLC sublayer 303 provides segmentation and reassembly of upper-layer packets, retransmission of lost packets, and packet reordering to compensate for out-of-order reception due to HARQ. The MAC sublayer 302 provides multiplexing between logical and transport channels. MAC sublayer 302 is also responsible for allocating various radio resources (e.g., resource blocks) within a cell. MAC sublayer 302 is also responsible for HARQ operations. The RRC (Radio Resource Control) sublayer 306 in Layer 3 (L3) of the control plane 300 is responsible for acquiring radio resources (i.e., radio bearers) and using RRC signaling to configure the lower layers. The radio protocol architecture of the user plane 350 includes Layer 1 (L1) and Layer 2 (L2). In the user plane 350, the radio protocol architecture for Physical Layer 351, PDCP sublayer 354 in L2 layer 355, RLC sublayer 353 in L2 layer 355, and MAC sublayer 352 in L2 layer 355 is largely the same as the corresponding layers and sublayers in the control plane 300. However, PDCP sublayer 354 also provides header compression for upper layer packets to reduce radio transmission overhead. The L2 layer 355 in the user plane 350 also includes the SDAP (Service Data Adaptation Protocol) sublayer 356. The SDAP sublayer 356 is responsible for the mapping between QoS streams and data radio bearers (DRBs) to support service diversity.

[0328] As an example, Appendix Figure 3 The wireless protocol architecture described herein is applicable to the first node in this application.

[0329] As an example, Appendix Figure 3 The wireless protocol architecture described herein is applicable to the second node in this application.

[0330] As an example, Appendix Figure 3 The wireless protocol architecture described herein is applicable to the third node described in this application.

[0331] As an example, Appendix Figure 3 The wireless protocol architecture described herein is applicable to the fourth node described in this application.

[0332] As an example, the first signaling in this application is generated in the RRC306.

[0333] As an example, the first signaling in this application is generated in MAC302 or MAC352.

[0334] As an example, the first signaling in this application is generated in the PHY301 or PHY351.

[0335] As an example, the second signaling in this application is generated in the RRC306.

[0336] As an example, the second signaling in this application is generated in MAC302 or MAC352.

[0337] As an example, the second signaling in this application is generated in the PHY301 or PHY351.

[0338] As an example, the first wireless signal in this application is generated in the RRC306.

[0339] As an example, the first wireless signal in this application is generated by MAC302 or MAC352.

[0340] As an example, the first wireless signal in this application is generated by the PHY301 or PHY351.

[0341] As an example, the second wireless signal in this application is generated in the RRC306.

[0342] As an example, the second wireless signal in this application is generated by MAC302 or MAC352.

[0343] As an example, the second wireless signal in this application is generated by the PHY301 or PHY351.

[0344] As an example, the first message in this application is generated in the RRC306.

[0345] As an example, the first message in this application is generated by MAC302 or MAC352.

[0346] As an example, the first message in this application is generated by the PHY301 or PHY351.

[0347] As an example, the second message in this application is generated in the RRC306.

[0348] As an example, the second message in this application is generated by MAC302 or MAC352.

[0349] As an example, the second message in this application is generated in the PHY301 or PHY351.

[0350] Example 4

[0351] Example 4 shows schematic diagrams of a first communication device and a second communication device according to this application, as shown in the appendix. Figure 4 As shown. Figure 4 This is a block diagram of a first communication device 450 and a second communication device 410 communicating with each other in the access network.

[0352] The first communication device 450 includes a controller / processor 459, a memory 460, a data source 467, a transmitting processor 468, a receiving processor 456, a multi-antenna transmitting processor 457, a multi-antenna receiving processor 458, a transmitter / receiver 454, and an antenna 452.

[0353] The second communication device 410 includes a controller / processor 475, a memory 476, a receiver processor 470, a transmitter processor 416, a multi-antenna receiver processor 472, a multi-antenna transmitter processor 471, a transmitter / receiver 418, and an antenna 420.

[0354] In the transmission from the second communication device 410 to the first communication device 450, at the second communication device 410, upper-layer data packets from the core network are provided to the controller / processor 475. The controller / processor 475 implements L2 layer functionality. In the transmission from the second communication device 410 to the first communication device 450, the controller / processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation to the first communication device 450 based on various priority metrics. The controller / processor 475 is also responsible for retransmitting lost packets and signaling to the first communication device 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for the L1 layer (i.e., the physical layer). Transmit processor 416 performs encoding and interleaving to facilitate forward error correction (FEC) at the second communication device 410, and mapping of signal clusters based on various modulation schemes (e.g., Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), M-Phase Shift Keying (M-PSK), M-QAM). Multi-antenna transmit processor 471 performs digital spatial precoding on the encoded and modulated symbols, including codebook-based and non-codebook-based precoding, and beamforming processing, generating one or more spatial streams. Transmit processor 416 then maps each spatial stream to subcarriers, multiplexes it with a reference signal (e.g., a pilot) in the time and / or frequency domains, and subsequently uses inverse fast Fourier transform (IFFT) to generate a physical channel carrying the time-domain multicarrier symbol stream. Multi-antenna transmit processor 471 then performs transmit analog precoding / beamforming operations on the time-domain multicarrier symbol stream. Each transmitter 418 converts the baseband multicarrier symbol stream provided by the multi-antenna transmitter processor 471 into an radio frequency stream, which is then provided to different antennas 420.

[0355] In the transmission from the second communication device 410 to the first communication device 450, at the first communication device 450, each receiver 454 receives a signal through its corresponding antenna 452. Each receiver 454 recovers the information modulated onto the radio frequency carrier and converts the radio frequency stream into a baseband multicarrier symbol stream, which is then provided to the receiver processor 456. The receiver processor 456 and the multi-antenna receiver processor 458 implement various signal processing functions of the L1 layer. The multi-antenna receiver processor 458 performs receive analog precoding / beamforming operations on the baseband multicarrier symbol stream from the receiver 454. The receiver processor 456 uses a Fast Fourier Transform (FFT) to convert the baseband multicarrier symbol stream after the receive analog precoding / beamforming operations from the time domain to the frequency domain. In the frequency domain, the physical layer data signal and the reference signal are demultiplexed by the receiver processor 456, where the reference signal is used for channel estimation, and the data signal is recovered in the multi-antenna receiver processor 458 after multi-antenna detection to recover any spatial stream destined for the first communication device 450. Symbols on each spatial stream are demodulated and recovered in the receive processor 456, generating soft decisions. The receive processor 456 then decodes and deinterleaves the soft decisions to recover the upper-layer data and control signals transmitted by the second communication device 410 over the physical channel. The upper-layer data and control signals are then provided to the controller / processor 459. The controller / processor 459 implements the functions of Layer 2. The controller / processor 459 may be associated with a memory 460 storing program code and data. The memory 460 may be referred to as computer-readable media. In the transmission from the second communication device 410 to the second communication device 450, the controller / processor 459 provides multiplexing, packet reassembly, decryption, header decompression, and control signal processing between the transport and logical channels to recover upper-layer data packets from the core network. The upper-layer data packets are then provided to all protocol layers above Layer 2. Various control signals may also be provided to Layer 3 for Layer 3 processing.

[0356] In the transmission from the first communication device 450 to the second communication device 410, at the first communication device 450, a data source 467 is used to provide upper-layer data packets to the controller / processor 459. The data source 467 represents all protocol layers above the L2 layer. Similar to the transmission functions at the second communication device 410 described in the transmission from the second communication device 410 to the first communication device 450, the controller / processor 459 implements header compression, encryption, packet segmentation and reordering, and multiplexing between logical and transport channels based on radio resource allocation, implementing L2 layer functions for the user plane and control plane. The controller / processor 459 is also responsible for retransmitting lost packets and signaling to the second communication device 410. Transmit processor 468 performs modulation mapping and channel coding processing, while multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based and non-codebook-based precoding, and beamforming processing. Subsequently, transmit processor 468 modulates the generated spatial stream into a multi-carrier / single-carrier symbol stream. After analog precoding / beamforming operations in multi-antenna transmit processor 457, the stream is provided to different antennas 452 via transmitter 454. Each transmitter 454 first converts the baseband symbol stream provided by multi-antenna transmit processor 457 into a radio frequency symbol stream before providing it to antenna 452.

[0357] In the transmission from the first communication device 450 to the second communication device 410, the function at the second communication device 410 is similar to the receiving function at the first communication device 450 described in the transmission from the second communication device 410 to the first communication device 450. Each receiver 418 receives radio frequency signals through its corresponding antenna 420, converts the received radio frequency signals into baseband signals, and provides the baseband signals to the multi-antenna receiving processor 472 and the receiving processor 470. The receiving processor 470 and the multi-antenna receiving processor 472 jointly implement the L1 layer functions. The controller / processor 475 implements the L2 layer functions. The controller / processor 475 may be associated with a memory 476 that stores program code and data. The memory 476 may be referred to as computer-readable media. In the transmission from the first communication device 450 to the second communication device 410, the controller / processor 475 provides multiplexing between the transmission and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover upper-layer data packets from the UE 450. Upper-layer packets from the controller / processor 475 can be provided to the core network.

[0358] As one embodiment, the first communication device 450 includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used with the at least one processor, and the first communication device 450 at least: receives first signaling, the first signaling being used for mobility control, the first signaling being used to indicate at least a first target cell and a second target cell; performs a first handshake process, the first handshake process being for the first target cell; performs a second handshake process, the second handshake process being for the second target cell; determines whether to initiate an RRC connection re-establishment process based on whether at least one of the first handshake process or the second handshake process has been successfully completed; wherein, at least the first handshake process or the second handshake process is used for primary cell handover; the start time of the first handshake process is not later than the start time of the second handshake process; the action of determining whether to initiate an RRC connection re-establishment process based on whether at least one of the first handshake process or the second handshake process has been successfully completed includes: either the first handshake process or the second handshake process failing to complete successfully is used to determine to initiate the RRC connection re-establishment process; or either the first handshake process or the second handshake process successfully completing is used to determine not to initiate the RRC connection re-establishment process.

[0359] As one embodiment, the first communication device 450 includes: a memory storing a computer-readable instruction program, which, when executed by at least one processor, generates actions including: receiving first signaling used for mobility control, the first signaling being used to indicate at least a first target cell and a second target cell; performing a first handshake process for the first target cell; performing a second handshake process for the second target cell; determining whether to initiate an RRC connection re-establishment process based on whether at least one of the first handshake process or the second handshake process has been successfully completed; wherein at least the first handshake process or the second handshake process is used for primary cell handover; the start time of the first handshake process is not later than the start time of the second handshake process; the action of determining whether to initiate an RRC connection re-establishment process based on whether at least one of the first handshake process or the second handshake process has been successfully completed includes: either the first handshake process or the second handshake process failing to complete successfully being used to determine to initiate the RRC connection re-establishment process; or either the first handshake process or the second handshake process being successfully completed being used to determine not to initiate the RRC connection re-establishment process.

[0360] As one embodiment, the second communication device 410 includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used with the at least one processor. The second communication device 410 at least: transmits first signaling, the first signaling being used for mobility control, the first signaling being used to indicate at least a first target cell and a second target cell; wherein a first handshake process is performed, the first handshake process being for the first target cell; a second handshake process is performed, the second handshake process being for the second target cell; whether at least one of the first handshake process or the second handshake process is successfully completed is used to determine whether an RRC connection re-establishment process is initiated; at least the first handshake process or the second handshake process is used for primary cell handover; the start time of the first handshake process is not later than the start time of the second handshake process; the behavior of determining whether to initiate an RRC connection re-establishment process based on whether at least one of the first handshake process or the second handshake process is successfully completed includes: either the first handshake process or the second handshake process failing to complete successfully is used to determine that the RRC connection re-establishment process is initiated; or at least one of the first handshake process or the second handshake process successfully completing is used to determine that the RRC connection re-establishment process is not initiated.

[0361] As one embodiment, the second communication device 410 includes: a memory storing a computer-readable instruction program that, when executed by at least one processor, produces actions, the actions including: sending first signaling, the first signaling being used for mobility control, the first signaling being used to indicate at least a first target cell and a second target cell; wherein a first handshake process is performed, the first handshake process being for the first target cell; a second handshake process is performed, the second handshake process being for the second target cell; whether at least one of the first handshake process or the second handshake process is successfully completed is used to determine whether an RRC connection re-establishment process is initiated; at least the first handshake process or the second handshake process is used for primary cell handover; the start time of the first handshake process is not later than the start time of the second handshake process; the action of determining whether to initiate an RRC connection re-establishment process based on whether at least one of the first handshake process or the second handshake process is successfully completed includes: either the first handshake process or the second handshake process is not successfully completed, used to determine that the RRC connection re-establishment process is initiated; or at least one of the first handshake process or the second handshake process is successfully completed, used to determine that the RRC connection re-establishment process is not initiated.

[0362] As one embodiment, the antenna 452, the receiver 454, the receiving processor 456, and the controller / processor 459 are used to receive the first signaling; at least one of the antenna 420, the transmitter 418, the transmitting processor 416, and the controller / processor 475 is used to transmit the first signaling.

[0363] In one implementation, the antenna 452, the transmitter 454, the transmitter processor 468, and the controller / processor 459 are used to transmit a second signaling; at least one of the antenna 420, the receiver 418, the receiver processor 470, and the controller / processor 475 is used to receive the second signaling.

[0364] In one implementation, the antenna 452, the transmitter 454, the transmitter processor 468, and the controller / processor 459 are used to transmit a first wireless signal; at least one of the antenna 420, the receiver 418, the receiver processor 470, and the controller / processor 475 is used to receive the first wireless signal.

[0365] As one embodiment, the antenna 452, the receiver 454, the receiving processor 456, and the controller / processor 459 are used to monitor and / or receive a second wireless signal; at least one of the antenna 420, the transmitter 418, the transmitting processor 416, and the controller / processor 475 is used to monitor and / or transmit a second wireless signal.

[0366] In one implementation, the antenna 452, the transmitter 454, the transmitter processor 468, and the controller / processor 459 are used to transmit a first message; at least one of the antenna 420, the receiver 418, the receiver processor 470, and the controller / processor 475 is used to receive the first message.

[0367] As one embodiment, the antenna 452, the receiver 454, the receiving processor 456, and the controller / processor 459 are used to monitor and / or receive the second message; at least one of the antenna 420, the transmitter 418, the transmitting processor 416, and the controller / processor 475 is used to monitor and / or transmit the second message.

[0368] As an example, the first communication device 450 corresponds to the first node in this application.

[0369] As an example, the second communication device 410 corresponds to the second node in this application.

[0370] As an example, the first communication device 450 is a user equipment.

[0371] As an example, the first communication device 450 is a user equipment that supports large latency differences.

[0372] As an example, the first communication device 450 is a user device that supports NTN.

[0373] As an example, the first communication device 450 is an aircraft device.

[0374] As an example, the first communication device 450 has positioning capabilities.

[0375] As an example, the first communication device 450 does not have a fixed capability.

[0376] As an example, the first communication device 450 is a TN-supporting user equipment.

[0377] As one embodiment, the second communication device 410 is a base station device (gNB / eNB / ng-eNB).

[0378] As an example, the second communication device 410 is a base station device that supports large latency differences.

[0379] As one embodiment, the second communication device 410 is a base station device that supports NTN.

[0380] As an example, the second communication device 410 is a satellite device.

[0381] As one embodiment, the second communication device 410 is a flight platform device.

[0382] As an example, the second communication device 410 is a TN-supporting base station device.

[0383] Example 5

[0384] Example 5 illustrates a wireless signal transmission flowchart according to an embodiment of this application, as shown in the attached diagram. Figure 5 As shown. It should be noted that the order in this example does not limit the order of signal transmission and implementation in this application.

[0385] for First node U01In step S5101, a first signaling is received, which is used for mobility control and is used to indicate at least a first target cell and a second target cell. In step S5102, a first handshake process is performed, which is directed to the first target cell. In step S5103, a second handshake process is performed, which is directed to the second target cell. In step S5104, it is determined whether at least one of the first handshake process or the second handshake process has been successfully completed. Based on whether at least one of the first handshake process or the second handshake process has been successfully completed, it is determined whether to initiate an RRC connection re-establishment process. If neither the first handshake process nor the second handshake process has been successfully completed, proceed to step S5105; otherwise, skip step S5105. In step S5105, the RRC connection re-establishment process is initiated.

[0386] for Second node N02 In step S5201, the first signaling is sent.

[0387] for Third node N03 In step S5102, the first handshake process is executed.

[0388] for Fourth node N04 In step S5103, the second handshake process is executed.

[0389] In Embodiment 5, at least the first handshake process or the second handshake process is used for primary cell handover; the start time of the first handshake process is not later than the start time of the second handshake process; the behavior of determining whether to initiate an RRC connection re-establishment process based on whether at least one of the first handshake process or the second handshake process is successfully completed includes: if either the first handshake process or the second handshake process is not successfully completed, it is used to determine to initiate the RRC connection re-establishment process; if at least one of the first handshake process or the second handshake process is successfully completed, it is used to determine not to initiate the RRC connection re-establishment process.

[0390] As an example, the first node U01 is a user equipment.

[0391] As an example, the first node U01 is a base station device.

[0392] As an example, the first node U01 is a relay device.

[0393] As one example, the second node N02 is a user equipment.

[0394] As an example, the second node N02 is a relay device.

[0395] As one example, the second node N02 is a base station device.

[0396] As one example, the second node N02 is the sustaining base station of the first cell.

[0397] As one embodiment, the second node N02 is the maintenance base station for the serving cell of the first node U01.

[0398] As an example, the second node N02 is the source MN of the first node U01.

[0399] As an example, the second node N02 is the source SN (Secondary Node) of the first node U01.

[0400] As an example, the second node N02 is an MN.

[0401] As an example, the second node N02 is an M-NG-RAN node.

[0402] As an example, the second node N02 is an NG-RAN node.

[0403] As an example, the third node N03 is a user equipment.

[0404] As an example, the third node N03 is a relay device.

[0405] As an example, the third node N03 is a base station device.

[0406] As an example, the third node N03 is an MN.

[0407] As an example, the third node N03 is an M-NG-RAN node.

[0408] As an example, the third node N03 is an NG-RAN node.

[0409] As an example, the third node N03 is the sustaining base station of the first target cell.

[0410] As an example, the third node N03 is the target MN of the first node U01.

[0411] As an example, the fourth node N04 is an SN.

[0412] As an example, the fourth node N04 is an S-NG-RAN node.

[0413] As an example, the fourth node N04 is a user equipment.

[0414] As an example, the fourth node N04 is a relay device.

[0415] As an example, the fourth node N04 is a base station device.

[0416] As an example, the fourth node N04 is the sustaining base station of the second target cell.

[0417] As an example, the fourth node N04 is the target SN.

[0418] As an example, the fourth node N04 is the source SN.

[0419] As an example, the fourth node N04 is a source S-NG-RAN node.

[0420] As an example, the fourth node N04 is the target S-NG-RAN node.

[0421] As an example, step S5102 includes sending the first wireless signal in this application.

[0422] As one embodiment, step S5102 includes receiving the second wireless signal from this application.

[0423] As an example, step S5103 includes sending the first message in this application.

[0424] As an example, step S5103 includes receiving the second message from this application.

[0425] As an example, the start time of step S5102 is no later than the start time of step S5103.

[0426] As an example, steps S5102 and S5103 overlap in time.

[0427] As an example, steps S5102 and S5103 do not overlap in time.

[0428] Example 6

[0429] Example 6 illustrates a wireless signal transmission flowchart of a first handshake process according to an embodiment of this application, as shown in the attached diagram. Figure 6As shown. It should be noted that the order in this example does not limit the order of signal transmission and implementation in this application.

[0430] for First node U01 In step S6101, a first wireless signal is transmitted on the first target cell; in step S6102, a second wireless signal is monitored on the first target cell; in step S6103, it is determined whether the second wireless signal is received. If the second wireless signal is received, proceed to step S6104(a); if the second wireless signal is not received, proceed to step S6104(b); in step S6104(a), it is determined that the first handshake process has been successfully completed; in step S6104(b), it is determined that the first handshake process has not been successfully completed.

[0431] for Third node N03 In step S6301, the first wireless signal is received; in step S6302, the second wireless signal is transmitted.

[0432] In Embodiment 6, the first wireless signal is used to trigger the second wireless signal; whether the second wireless signal is received is used to determine whether the first handshake process is successfully completed; the receipt of the second wireless signal is used to determine that the first handshake process is successfully completed, and the non-receipt of the second wireless signal is used to determine that the first handshake process is not successfully completed; the first wireless signal includes at least a random access preamble.

[0433] As an example, the receiver of the first wireless signal is the third node N03.

[0434] In one embodiment, the sender of the second wireless signal is the same as the receiver of the first wireless signal.

[0435] As an example, the third node N03 is the sustaining base station of the first target cell, and the first target cell is a target PCell.

[0436] As an example, the receiver of the first wireless signal is the sustaining base station of the first target cell, and the first target cell is a target PCell.

[0437] As an example, the base station maintaining a target PCell is a target MN.

[0438] As an example, the base station sustaining a target PCell is a target M-NG-RAN node.

[0439] As an example, the base station sustaining a target PCell is a target NG-RAN node.

[0440] As one embodiment, transmitting a first radio signal on the first target cell includes: the first radio signal being received by a sustaining base station of the first target cell.

[0441] As one embodiment, transmitting a first radio signal on the first target cell includes: the resources of the first radio signal being configured by the first target cell.

[0442] As an example, the first wireless signal is a physical layer signal.

[0443] As one embodiment, the first wireless signal includes physical layer signals and higher layer signals.

[0444] As an example, the first wireless signal is Message 1 (Msg1).

[0445] As an example, the first wireless signal is message A (Message A, MsgA).

[0446] As one embodiment, the first wireless signal includes random access preamble and PUSCH (Physical Uplink Shared Channel) transmission.

[0447] As an example, the first wireless signal is the last random access preamble sent during the first random access process.

[0448] As one embodiment, the first wireless signal includes the last random access preamble sent during the first random access process.

[0449] As one embodiment, monitoring the second wireless signal on the first target cell includes: the second wireless signal being transmitted by the sustaining base station of the first target cell.

[0450] As one embodiment, monitoring the second radio signal on the first target cell includes: monitoring the second radio signal through an RNTI (Radio Network Temporary Identifier) ​​assigned by the first target cell.

[0451] As a sub-example of this embodiment, the RNTI allocated by the first target cell is a C-RNTI (Cell RNTI).

[0452] As a sub-example of this embodiment, the RNTI allocated by the first target cell is a RA-RNTI.

[0453] As a sub-example of this embodiment, the RNTI allocated by the first target cell is an MSGB-RNTI.

[0454] As one embodiment, monitoring the second wireless signal on the first target cell includes:

[0455] As one embodiment, monitoring the second wireless signal includes: monitoring the PDCCH (Physical Downlink Control Channel) identified by RA-RNTI to determine whether a valid downlink allocation has been received.

[0456] As one embodiment, monitoring the second wireless signal includes: determining whether the second wireless signal exists.

[0457] As one embodiment, monitoring the second wireless signal includes determining whether the second wireless signal exists by performing a CRC (Cyclic Redundancy Check) check.

[0458] As an example, the PDCCH identified by RA-RNTI is used to monitor the second wireless signal.

[0459] As an example, a second wireless signal is monitored during the operation of ra-ResponseWindow.

[0460] As an example, a second wireless signal is monitored during the operation of msgB-ResponseWindow.

[0461] As an example, a second wireless signal is monitored during the operation of ra-ContentionResolutionTimer.

[0462] As an example, the second wireless signal is used to determine that the random access procedure to which the first wireless signal belongs has been successfully completed.

[0463] As an example, if the second wireless signal is received, the random access procedure to which the first wireless signal belongs is considered to have been successfully completed.

[0464] As one embodiment, the second wireless signal includes a PDCCH.

[0465] As one embodiment, the second radio signal includes a valid downlink assignment received on the PDCCH.

[0466] As one embodiment, the second radio signal includes a valid downlink allocation received on a PDCCH identified by RA-RNTI.

[0467] As one embodiment, the second radio signal includes a valid downlink allocation received on a PDCCH identified by MSGB-RNTI.

[0468] As an example, the effective downlink allocation includes a MAC RAR (Random Access Response).

[0469] As an example, the effective downlink allocation includes a fallbackRAR.

[0470] As one embodiment, the phrase "the first wireless signal is used to trigger the second wireless signal" means: receiving the second wireless signal in response to the transmission of the first wireless signal.

[0471] As a sub-example of this embodiment, the type (RA_TYPE) of the random access procedure to which the first wireless signal belongs is 4-step RA, the first wireless signal is used for CFRA, and the second wireless signal includes MAC RAR.

[0472] As a sub-example of this embodiment, the random access procedure to which the first wireless signal belongs is of type 2-stepRA, the first wireless signal is used for CFRA, and the second wireless signal includes fallbackRAR.

[0473] As a sub-example of this embodiment, the type of random access procedure to which the first wireless signal belongs is 2-stepRA, the first wireless signal is used for CBRA, and the second wireless signal includes successRAR.

[0474] As an example, the phrase "the first wireless signal is used to trigger the second wireless signal" includes the following meanings: receiving message 2 (Message 2, Msg2) in response to the transmission of the first wireless signal; sending message 3 (Message 3, Msg3) in response to the reception of message 2; and receiving the second wireless signal in response to the transmission of message 3.

[0475] As a sub-example of this embodiment, the random access procedure to which the first wireless signal belongs is of type 4-stepRA, and the first wireless signal is used for CBRA.

[0476] As a sub-example of this embodiment, message 2 is a MAC RAR.

[0477] As a sub-example of this embodiment, message 2 indicates an uplink grant (UL grant).

[0478] As a sub-example of this embodiment, message 3 includes a C-RNTI MAC CE, and the C-RNTI MAC CE includes a first RNTI.

[0479] As a sub-example of this embodiment, the second wireless signal is a PDCCH transmission addressed to the first RNTI.

[0480] As a sub-implementation of this embodiment, the second wireless signal includes an uplink grant (UL grant for a new transmission).

[0481] As an example, the phrase "the first wireless signal is used to trigger the second wireless signal" includes the following meanings: receiving message B (Message B, MsgB) in response to the transmission of the first wireless signal; sending message 3 in response to the reception of message B; and receiving the second wireless signal in response to the transmission of message 3.

[0482] As a sub-example of this embodiment, the random access procedure to which the first wireless signal belongs is of type 4-stepRA, and the first wireless signal is used for CBRA.

[0483] As a sub-example of this embodiment, message B is a fallback RAR.

[0484] As a sub-example of this embodiment, message B indicates uplink grant.

[0485] As a sub-example of this embodiment, message 3 includes a C-RNTI MAC CE, and the C-RNTI MAC CE includes a first RNTI.

[0486] As a sub-example of this embodiment, the second wireless signal is a PDCCH transmission addressed to the first RNTI.

[0487] As a sub-implementation of this embodiment, the second wireless signal includes an uplink grant used for the new transmission.

[0488] As an example, the first RNTI is a C-RNTI.

[0489] As an example, the first RNTI is the C-RNTI of the first node U01 in the first target cell.

[0490] As an example, the first RNTI is an RNTI assigned by the sustaining base station of the first target cell.

[0491] As an example, when the second wireless signal is received, PREAMBLE_TRANSMISSION_COUNTER does not reach preambleTransMax+1.

[0492] As an example, during the time interval between the first wireless signal being sent and the second wireless signal being received, PREAMBLE_TRANSMISSION_COUNTER is not set to 1.

[0493] As an example, the second wireless signal is received.

[0494] In one embodiment, the second wireless signal was not received.

[0495] As an example, the phrase "the first wireless signal is used to trigger the second wireless signal" means that the second wireless signal is received after the first wireless signal is sent.

[0496] As an example, the phrase "the first wireless signal is used to trigger the second wireless signal" means that the first wireless signal directly triggers the second wireless signal.

[0497] As an example, the phrase "the first wireless signal is used to trigger the second wireless signal" means that the first wireless signal indirectly triggers the second wireless signal.

[0498] As an example, the phrase "the first wireless signal is used to trigger the second wireless signal" means that the first wireless signal and the second wireless signal belong to the same random access procedure.

[0499] As an example, the phrase "the first wireless signal is used to trigger the second wireless signal" means that the first wireless signal is used to initiate a random access procedure, and the second wireless signal is used to determine that the random access procedure has been successfully completed.

[0500] As one embodiment, the phrase "whether the second wireless signal is received" being used to determine whether the first handshake process has been successfully completed includes: whether the second wireless signal is received being used to determine whether the random access procedure to which the first wireless signal belongs has been successfully completed, and whether the random access procedure to which the first wireless signal belongs has been successfully completed being used to determine whether the first handshake process has been successfully completed.

[0501] As one embodiment, the phrase "whether the second wireless signal is received" being used to determine whether the first handshake process was successfully completed includes: whether the first handshake process was successfully completed is related to whether the second wireless signal was received.

[0502] As an example, receiving the second wireless signal is used to determine that the random access procedure to which the first wireless signal belongs has been successfully completed; the successful completion of the random access procedure to which the first wireless signal belongs is used to determine that the first handshake procedure has been successfully completed.

[0503] As one embodiment, the failure to receive the second wireless signal is used to determine that the random access procedure to which the second wireless signal belongs has not been successfully completed; the failure to complete the random access procedure to which the second wireless signal belongs is used to determine that the first handshake procedure has not been successfully completed.

[0504] As an example, the failure of PREAMBLE_TRANSMISSION_COUNTER to reach preambleTransMax+1 is used to determine that the first wireless signal was not received.

[0505] As an example, the ra-ResponseWindow expiration is used to determine that the first wireless signal has not been received.

[0506] As an example, the msgB-ResponseWindow expiration is used to determine that the first wireless signal has not been received.

[0507] As an example, the ra-ContentionResolutionTimer expiration is used to determine that the first wireless signal has not been received.

[0508] As an example, the random access preamble includes a feature sequence.

[0509] As an example, the random access preamble includes a bit string.

[0510] As an example, the random access preamble is a preamble used for contention-free random access (CFRA).

[0511] As an example, the random access preamble is a preamble used for contention-based random access (CBRA).

[0512] As an example, the first timer is T304.

[0513] As one example, the first timer is for the first target cell.

[0514] As one example, the first timer is for the cell group to which the first target cell belongs.

[0515] As an example, the first timer is configured and the first timer is started.

[0516] As an example, the first timer is not configured and is not started.

[0517] As one example, the phrase accompanying the initiation of the primary cell handover includes: when synchronous reconfiguration begins.

[0518] As one embodiment, the phrase accompanying the initiation of the primary cell handover includes: when the first signaling is received.

[0519] As one embodiment, the phrase accompanying the initiation of the primary cell handover includes: after receiving the first signaling.

[0520] As an example, the phrase accompanying the initiation of the primary cell handover includes: when the first execution condition is met.

[0521] As an example, the phrase accompanying the initiation of the primary cell handover includes: after at least one of timer T310, timer T312, or timer T316 has been stopped.

[0522] As an example, the phrase accompanying the initiation of the primary cell handover includes: when the configuration in the reconfigurationWithSync of the first signaling is executed.

[0523] As an example, the action of starting the first timer means: starting a timer.

[0524] As an example, the action of activating the first timer means that the first timer starts counting.

[0525] As an example, the action of starting the first timer means that the first timer starts running.

[0526] As an example, receiving the second wireless signal is used to determine that the random access procedure to which the first wireless signal belongs has been successfully completed; the successful completion of the random access procedure to which the first wireless signal belongs is used to determine that the first handshake procedure has been successfully completed.

[0527] As one embodiment, the second wireless signal received during the operation of the first timer is used to determine to stop the first timer.

[0528] As an example, the successful completion of the random access procedure to which the first wireless signal belongs is used to determine to stop the first timer.

[0529] As an example, the failure to complete the first handshake process includes: the primary cell handover failed.

[0530] As one example, the failure of the first handshake process to be completed successfully includes: a handover failure from the first cell to the first target cell.

[0531] As an example, the expiration of the first timer means that the second wireless signal was not received during the operation of the first timer.

[0532] As an example, the expiration of the first timer means that the random access procedure to which the first wireless signal belongs was not successfully completed during the operation of the first timer.

[0533] As an example, the expiration of the first timer means that the running time of the first timer has reached the expiration value of the first timer.

[0534] As an example, the expiration of the first timer means that the value of the first timer reaches the expiration value of the first timer.

[0535] As an example, the expiration value of the first timer is configurable.

[0536] As an example, the expiration value of the first timer is pre-configured.

[0537] As an example, the expiration value of the first timer is configured via an RRC message.

[0538] As one example, the first handshake process failing to complete successfully includes: the first timer expiring.

[0539] As one example, the failure of the first handshake process to be completed includes: the random access procedure to which the first wireless signal belongs fails.

[0540] As one example, the first handshake process failing to complete includes: the first timer being running, and the random access procedure to which the first wireless signal belongs failing to complete.

[0541] As an example, the first handshake process failing to complete includes: during the operation of the first timer, the measurement result for the first target cell is lower than a first threshold.

[0542] As an example, the failure of the first handshake process to be completed includes: during the operation of the first timer, the measurement result for the first target cell is lower than a first threshold, and the measurement result for a neighboring cell is not lower than a second threshold.

[0543] As one example, the failure of the first handshake process to be completed includes: during the operation of the first timer, the measurement result for the first target cell is lower than the measurement result for a neighboring cell.

[0544] As an example, the above measurement results do not take offset into account.

[0545] As an example, the above measurement results can be combined with bias.

[0546] As an example, the unit of the first threshold is at least one of RSRP, RSRQ, or SINR.

[0547] As an example, the unit of the second threshold is at least one of RSRP, RSRQ, or SINR.

[0548] As an example, the aforementioned neighboring cells refer to the cells adjacent to the first target cell.

[0549] As an example, the aforementioned neighboring cells refer to the cells adjacent to the first cell.

[0550] As an example, the aforementioned neighboring cell includes a third target cell.

[0551] As an example, the failure of the random access procedure to which the first radio signal belongs includes: the PREAMBLE_TRANSMISSION_COUNTER of the random access procedure to which the first radio signal belongs reaches preambleTransMax+1.

[0552] As an example, the failure of the random access procedure to which the first wireless signal belongs includes: the random access procedure to which the first wireless signal belongs was not successfully completed.

[0553] As an example, the failure of the random access procedure to which the first radio signal belongs includes: the MAC entity of the cell group to which the first target cell belongs instructing the RRC layer that a random access problem has occurred.

[0554] As an example, the failure of the random access procedure to which the first radio signal belongs includes: the PREAMBLE_TRANSMISSION_COUNTER of the random access procedure to which the first radio signal belongs reaches preambleTransMax+1, and the MAC entity of the cell group to which the first target cell belongs indicates to the RRC layer that a random access problem has occurred.

[0555] As an example, the third node N03 receives the first wireless signal.

[0556] As an example, the third node N03 did not receive the first wireless signal.

[0557] As one embodiment, the second wireless signal is transmitted by the third node N03.

[0558] As an example, the second wireless signal was not transmitted by the third node N03.

[0559] Example 7

[0560] Example 7 illustrates a wireless signal transmission flowchart of a second handshake process according to an embodiment of this application, as shown in the attached diagram. Figure 7 As shown. It should be noted that the order in this example does not limit the order of signal transmission and implementation in this application.

[0561] for First node U01 In step S7101, a first message is sent on the second target cell; in step S7102, a second message is monitored in response to the sending of the first message; in step S7103, it is determined whether the second message has been received; if the second message has been received, proceed to step S7104(a); if the second message has not been received, proceed to step S7104(b); in step S7104(a), it is determined that the second handshake process has been successfully completed; in step S7104(b), it is determined that the second handshake process has not been successfully completed.

[0562] for Fourth node N04 In step S7401, the first message is received; in step S7402, the second message is sent.

[0563] In Embodiment 7, whether the second message is received is used to determine whether the second handshake process has been successfully completed; the receipt of the second message is used to determine that the second handshake process has been successfully completed, and the non-receipt of the second message is used to determine that the second handshake process has not been successfully completed.

[0564] As one example, the recipient of the first message is the sustaining base station of the second target cell, and the second target cell is another target PCell.

[0565] As an example, the sustaining base station of the other target PCell is another target MN.

[0566] As an example, the sustaining base station of the other target PCell is another target M-NG-RAN node.

[0567] As an example, the sustaining base station of the other target PCell is another target NG-RAN node.

[0568] As an example, the recipient of the first message is the sustaining base station of the second target cell, and the second target cell is a target PSCell.

[0569] As an example, the base station maintaining a target PSCell is a target SN.

[0570] As an example, the base station sustaining a target PSCell is a target S-NG-RAN node.

[0571] As an example, the recipient of the first message is the sustaining base station of the second target cell, and the second target cell is a source PSCell.

[0572] As an example, the sustaining base station of the source PSCell is a source SN.

[0573] As an example, the sustaining base station of the source PSCell is a source S-NG-RAN node.

[0574] As an example, the recipient of the first message is the sustaining base station of the second target cell, and the second target cell is a serving cell in the source SCG.

[0575] As an example, the sustaining base station of the serving cell in the source SCG is a source SN.

[0576] As an example, the sustaining base station of the serving cell in the source SCG is a source S-NG-RAN node.

[0577] As an example, the recipient of the first message is the fourth node N04.

[0578] As an example, the fourth node N04 is the sustaining base station of the second target cell, which is another target PCell.

[0579] As an example, the fourth node N04 is the sustaining base station of the second target cell, and the second target cell is a target PSCell.

[0580] As an example, the fourth node N04 is the sustaining base station of the second target cell, and the second target cell is a source PSCell.

[0581] As an example, the fourth node N04 is the sustaining base station of the second target cell, which is a serving cell in the source SCG.

[0582] In one embodiment, the sender of the second message is the same as the receiver of the first message.

[0583] As an example, the first message is used for handover failure recovery.

[0584] As an example, the first message is used for connection failure recovery.

[0585] As an example, the first message is an RRC message.

[0586] As an example, the signaling radio bearer (SRB) of the first message is SRB3.

[0587] As an example, the signaling radio bearer of the first message is split SRB1.

[0588] As an example, the first message is the MCGFailureInformation message.

[0589] As an example, the first message includes a field indicating that the reason for the second handshake process is a handover failure.

[0590] As an example, the value of one of the fields in the first message can be set to rlf or hof, where hof is used to indicate the handover failure and rlf is used to indicate Radio Link Failure (RLF).

[0591] As an example, the first message includes a measurement report of the third target cell.

[0592] As an example, the first message includes the PCI and measurement results of the third target cell.

[0593] As an example, the physCellId field in the first message indicates the PCI of the third target cell; the measResult in the first message indicates the measurement result of the third target cell.

[0594] As an example, the first message includes a MeasQuantityResults field, which includes at least one of the measurement results of rsrp, rsrq, or sinr.

[0595] As an example, the first message includes at least one of MeasResultListNR, physCellId, measResult, resultsSSB-Cell, or resultsCSI-RS-Cell.

[0596] As an example, the first message includes at least one of measId, measResultServingMOList, or MeasResultServMOList.

[0597] As one embodiment, the second message is used to release the RRC connection; or, the second message is used to suspend the RRC connection; or, the second message is used for mobility control; or, the second message is used for bearer type conversion; both the first message and the second message are RRC layer signaling; the first message includes at least a measurement report.

[0598] As one embodiment, the second message is used to release the RRC connection; both the first and second messages are RRC layer signaling; the first message includes at least a measurement report.

[0599] As a sub-implementation of this embodiment, the second message is the RRCRelease message.

[0600] As a sub-implementation of this embodiment, the second message includes CellReselectionPriorities.

[0601] As a sub-implementation of this embodiment, the second message does not include a field whose name includes SuspendConfig.

[0602] As a sub-implementation of this embodiment, the second message does not include a field whose name includes shortI-RNTI or a field whose name includes ShortI-RNTI-Value.

[0603] As a sub-implementation of this embodiment, the second message includes CellReselectionPriorities.

[0604] As one embodiment, the second message is used to suspend the RRC connection; both the first and second messages are RRC layer signaling; the first message includes at least a measurement report.

[0605] As a sub-implementation of this embodiment, the second message is the RRCRelease message.

[0606] As a sub-implementation of this embodiment, the second message includes CellReselectionPriorities.

[0607] As a sub-implementation of this embodiment, the second message includes a field whose name includes SuspendConfig.

[0608] As a sub-implementation of this embodiment, the second message includes I-RNTI-Value or ShortI-RNTI-Value.

[0609] As one embodiment, the second message is used for mobility control; both the first and second messages are RRC layer signaling; the first message includes at least a measurement report.

[0610] As a sub-implementation of this embodiment, the second message is the RRCReconfiguration message.

[0611] As a sub-implementation of this embodiment, the second message includes a field whose name includes ReconfigurationWithSync.

[0612] As a sub-implementation of this embodiment, the second message includes the ReconfigurationWithSync field.

[0613] As a sub-example of this embodiment, the second message includes a physCellId field, which indicates the Physical Cell Identity (PCI) of the third target cell, and the first message includes a measurement report of the third target cell.

[0614] As a sub-implementation of this embodiment, the second message includes a newUE-Identity field, the value of which indicates the RNTI of the first node U01 in the third target cell.

[0615] As a sub-example of this embodiment, the second message includes a t304 field, which indicates the expiration value of timer T304.

[0616] As an example, the second message is used for bearer type conversion; both the first and second messages are RRC layer signaling; the first message includes at least a measurement report.

[0617] As a sub-example of this embodiment, the second message is used to instruct the conversion of the MCG bearer and the SCG bearer.

[0618] As a sub-implementation of this embodiment, the second message is used to instruct the conversion of the SCG bearer to the MCG bearer, and the conversion of the MCG bearer to the SCG bearer.

[0619] As one example, the second message received during the second timer's operation is used to determine that the second handshake process has been successfully completed, and the second timer expiring is used to determine that the second handshake process has not been successfully completed.

[0620] As an example, the second handshake process is successfully completed in response to the receipt of the second message.

[0621] As an example, in response to the receipt of the second message, the action of successfully completing the second handshake process is performed.

[0622] As an example, when the second handshake process is initiated, the second timer is configured.

[0623] As an example, when the second handshake process is initiated, the second timer is not configured.

[0624] As one embodiment, the second timer is started along with the first message; wherein, both the first message and the second message are RRC layer signaling; the first message includes at least a measurement report.

[0625] As one embodiment, the second timer is for both the first message and the second message, which are RRC layer signaling.

[0626] As one example, the second timer is an RRC layer timer.

[0627] As an example, the second timer is T316.

[0628] As an example, the second timer is not T316.

[0629] As an example, the second timer is a new timer introduced in 3GPP TS 38.331 at least after R18.

[0630] As an example, the name of the second timer includes T3.

[0631] As an example, in response to the receipt of the second message, the second timer is stopped.

[0632] As an example, in response to the successful completion of the second handshake process, the second timer is stopped.

[0633] As an example, the second timer expires when the running time of the second timer reaches the expiration value of the second timer.

[0634] As an example, the second timer expires when the value of the second timer reaches its expiration value.

[0635] As one example, the expiration value of the second timer is configurable.

[0636] As an example, the expiration value of the second timer is pre-configured.

[0637] As an example, the expiration value of the second timer is configured via an RRC message.

[0638] As an example, both the first message and the second message are RRC layer signaling; the first message includes at least a measurement report.

[0639] As one example, the expiration of the second timer means that the second message has not been received.

[0640] As an example, the expiration of the second timer means that the second message was not received during the operation of the second timer.

[0641] As an example, in response to the handover request confirmation message being received by the second node N02, the second node N02 does not release the source SN.

[0642] As a sub-example of this embodiment, in response to the handover request message being received by the third node N03, the third node N03 adds the target SN.

[0643] As a sub-example of this embodiment, in response to the handover request message being received by the third node N03, the third node N03 did not add a target SN.

[0644] As an example, in response to the handover request message being received by the third node N03, the third node N03 adds the target SN.

[0645] As a sub-implementation of this embodiment, in response to the handover request confirmation message being received by the second node N02, the second node N02 releases the source SN.

[0646] As a sub-example of this embodiment, in response to the handover request confirmation message being received by the second node N02, the second node N02 does not release the source SN.

[0647] As a supplementary embodiment of this sub-example, the source SN is not configured to be used to determine that the second node N02 has not released the source SN.

[0648] As a supplementary embodiment of this sub-example, the source SN is configured and released.

[0649] As one embodiment, the first message is physical layer signaling; the first message includes at least a random access preamble.

[0650] As an example, in response to the handover request confirmation message being received by the second node N02, the second node N02 releases the source SN.

[0651] As an example, the first message is sent at the physical layer.

[0652] As an example, the first message is generated at the physical layer.

[0653] As an example, the first message is a random access preamble.

[0654] As an example, the first message is used in the random access procedure.

[0655] As an example, the first message is the last random access preamble in the random access process.

[0656] As an example, the second message is used to determine that the random access procedure to which the first message belongs was successfully completed.

[0657] As an example, the second message includes a PDCCH.

[0658] As an example, the second message includes a valid downlink assignment received on the PDCCH.

[0659] As one example, the second message includes a valid downlink allocation received on the PDCCH identified by RA-RNTI.

[0660] As one embodiment, the second message includes a valid downlink allocation received on the PDCCH identified by MSGB-RNTI.

[0661] As an example, the effective downlink allocation includes a MAC RAR.

[0662] As an example, the effective downlink allocation includes a fallbackRAR.

[0663] As an example, the second message is monitored by an RNTI assigned to the second target cell.

[0664] As a sub-example of this embodiment, the RNTI allocated by the second target cell is a C-RNTI.

[0665] As a sub-example of this embodiment, the RNTI allocated by the second target cell is a RA-RNTI.

[0666] As a sub-example of this embodiment, the RNTI allocated by the second target cell is an MSGB-RNTI.

[0667] As an example, monitoring the second message includes: the monitored PDCCH identified by RA-RNTI determining whether a valid downlink allocation has been received.

[0668] As one example, monitoring the second message includes: determining whether the second message exists.

[0669] As one example, monitoring the second message includes: determining whether the second message exists through CRC check.

[0670] As an example, the second message is monitored during the operation of ra-ResponseWindow.

[0671] As an example, the second message is monitored during the execution of msgB-ResponseWindow.

[0672] As an example, the second message is monitored during the operation of ra-ContentionResolutionTimer.

[0673] As an example, if the second message is received, it is considered that the random access procedure to which the first message belongs has been successfully completed.

[0674] As one example, the first message is used to trigger the second message.

[0675] As one example, the second message is received in response to the sending of the first message.

[0676] As one embodiment, the type of random access procedure to which the first message belongs is 4-step RA, the first message is used for CFRA, and the second message includes MAC RAR; or, the type of random access procedure to which the first message belongs is 2-step RA, the first message is used for CFRA, and the second message includes fallbackRAR; or, the type of random access procedure to which the first message belongs is 2-step RA, the first message is used for CBRA, and the second message includes successRAR.

[0677] As an example, in response to the sending of the first message, message 2 is received; in response to the receiving of message 2, message 3 is sent; in response to the sending of message 3, the second message is received; the type of random access procedure to which the first message belongs is 4-stepRA, and the first message is used for CBRA.

[0678] As a sub-implementation of this embodiment, message 2 includes a MAC RAR; message 2 indicates an uplink grant (UL grant).

[0679] As a sub-example of this embodiment, message 3 includes a C-RNTI MAC CE, and the C-RNTI MAC CE includes a first RNTI.

[0680] As a sub-implementation of this embodiment, the second message is a PDCCH transmission addressed to the first RNTI.

[0681] As a sub-implementation of this embodiment, the second message includes an uplink grant used for the new transmission.

[0682] As an example, in response to the sending of the first message, message B is received; in response to the receiving of message B, message 3 is sent; in response to the sending of message 3, the second message is received; the type of random access procedure to which the first message belongs is 4-stepRA, and the first message is used for CBRA.

[0683] As a sub-example of this embodiment, message B is a fallback RAR; message B indicates uplink grant.

[0684] As a sub-example of this embodiment, message 3 includes a C-RNTI MAC CE, and the C-RNTI MAC CE includes a first RNTI.

[0685] As a sub-implementation of this embodiment, the second message is a PDCCH transmission addressed to the second RNTI.

[0686] As a sub-implementation of this embodiment, the second message includes an uplink grant used for the new transmission.

[0687] As an example, the second RNTI is a C-RNTI.

[0688] As an example, the second RNTI is the C-RNTI of the first node U01 in the second target cell.

[0689] As an example, the second RNTI is an RNTI assigned by the sustaining base station of the second target cell.

[0690] As an example, when the second message is received, PREAMBLE_TRANSMISSION_COUNTER has not reached preambleTransMax+1.

[0691] As an example, during the time interval between the first message being sent and the second message being received, PREAMBLE_TRANSMISSION_COUNTER is not set to 1.

[0692] As an example, the second message is received.

[0693] In one example, the second message was not received.

[0694] As one embodiment, the phrase "the first handshake process was not successfully completed" being used to trigger the first message includes: the first message being sent as a response to the first handshake process not being successfully completed.

[0695] As one embodiment, the phrase "the first handshake process was not successfully completed" being used to trigger the first message includes: the first message being sent as a response to the failure of the primary cell handover.

[0696] As one embodiment, the phrase "the first handshake process was not successfully completed" being used to trigger the first message includes: the first message being sent as a response to the expiration of the first timer.

[0697] As one embodiment, the phrase "the first handshake process was not successfully completed" being used to trigger the first message includes: the first message being sent as a response to the failure of the random access procedure to which the first radio signal belongs to be successfully completed.

[0698] As an example, the start time of the first handshake process is earlier than the start time of the second handshake process; failure of the first handshake process to complete successfully is used to trigger the first message; the first message is sent on the second target cell; in response to the transmission of the first message, the second message is monitored; whether the second message is received is used to determine whether the second handshake process has been successfully completed; the receipt of the second message is used to determine that the second handshake process has been successfully completed, and the non-receipt of the second message is used to determine that the second handshake process has not been successfully completed; both the first message and the second message are RRC layer signaling; the first message includes at least a measurement report.

[0699] As an example, the start time of the first handshake process is no later than the start time of the second handshake process; the first message is sent on the second target cell; the second message is monitored in response to the sending of the first message; whether the second message is received is used to determine whether the second handshake process has been successfully completed; the receipt of the second message is used to determine that the second handshake process has been successfully completed, and the non-receipt of the second message is used to determine that the second handshake process has not been successfully completed; the first message is physical layer signaling; the first message includes at least a random access preamble.

[0700] As an example, the first message is received by the fourth node N04.

[0701] As an example, the first message was not received by the fourth node N04.

[0702] As an example, the second message is sent by the fourth node N04.

[0703] As an example, the second message was not sent by the fourth node N04.

[0704] Example 8

[0705] Example 8 illustrates a wireless signal transmission flowchart of the first signaling according to an embodiment of this application, as shown in the attached diagram. Figure 8 As shown. It should be noted that the order in this example does not limit the order of signal transmission and implementation in this application.

[0706] for First node U01 In step S8101, a first signaling is received, the first signaling being used for mobility control, and the first signaling being used to indicate at least a first target cell and a second target cell.

[0707] for Second node N02 In step S8201, a handover request message is sent; in step S8202, a handover request confirmation message is received; and in step S8203, a first signaling is sent.

[0708] for Third node N03 In step S8301, a handover request message is received; in step S8302, a secondary node add request message is sent in response to the receipt of the handover request message; in step S8303, a secondary node add request confirmation message is received in response to the sending of the secondary node add request message; and in step S8304, a handover request confirmation message is sent.

[0709] for Fourth node N04 In step S8401, the auxiliary node add request message is received; in step S8402, as a response to the receipt of the auxiliary node add request message, the auxiliary node add request confirmation message is sent.

[0710] In embodiment 8, the handover request message is used to trigger a secondary node add request message; the secondary node add request message is used to trigger a secondary node add request confirmation message; the secondary node add request confirmation message is used to trigger a handover request confirmation message; the handover request message is used to trigger a handover request confirmation message; and the handover request confirmation message is used to trigger the first signaling.

[0711] As an example, the second node N02 is the sustaining base station of the first cell, and the first cell is the source PCell.

[0712] As an example, the third node N03 is the sustaining base station of the first target cell, and the first target cell is a target PCell.

[0713] As an example, the fourth node N04 is the sustaining base station of the second target cell, and the second target cell is a target PSCell.

[0714] As an example, the switching request message is transmitted via the Xn interface.

[0715] As one example, the switching request message is transmitted via the X2 interface.

[0716] As an example, the switching request confirmation message is transmitted via the Xn interface.

[0717] As an example, the switching request confirmation message is transmitted via the X2 interface.

[0718] As an example, in response to the handover request message being sent by the second node N02, the second node N02 receives the handover request confirmation message.

[0719] As an example, in response to the handover request message sent by the second node N02, the second node N02 sets the timer TXn. RELOCprep During operation, the switch request confirmation message is received.

[0720] As an example, in response to the handover request message being received by the third node N03, the third node N03 sends the handover request confirmation message.

[0721] As an example, in response to the handover request confirmation message being received by the second node N02, the second node N02 sends the first signaling.

[0722] As an example, the handover request message directly triggers the handover request confirmation message.

[0723] As an example, the handover request message indirectly triggers the handover request confirmation message.

[0724] As an example, the handover request message is used to request resources from the third node N03 to be prepared for handover.

[0725] As an example, the handover request message includes the identity (ID) of the first target cell.

[0726] As an example, the switching request message includes the C-RNTI of the first node U01 in the second node N02.

[0727] As an example, the switch request confirmation message is used to notify the second node N02 of the resources prepared by the third node N03.

[0728] As an example, the handover request confirmation message includes a HandoverCommand message.

[0729] As an example, the handover request confirmation message includes a HandoverCommand message, which in turn includes an RRCReconfiguration message or an RRCConnectionReconfiguration message.

[0730] As an example, the phrase "the handover request confirmation message is used to trigger the first signaling" includes: the handover request confirmation message includes a HandoverCommand message, which is used to generate the first signaling.

[0731] As an example, the phrase "the handover request confirmation message is used to trigger the first signaling" includes: the handover request confirmation message includes a HandoverCommand message, and the first signaling includes at least a portion of the HandoverCommand message.

[0732] As an example, the phrase "the handover request confirmation message is used to trigger the first signaling" includes: the handover request confirmation message includes a HandoverCommand message, the HandoverCommand message includes an RRCReconfiguration message; the first signaling includes the RRCReconfiguration message.

[0733] As an example, the phrase "the handover request confirmation message is used to trigger the first signaling" includes: the handover request confirmation message includes a HandoverCommand message, the HandoverCommand message includes an RRCConnectionReconfiguration message; the first signaling includes the RRCConnectionReconfiguration message.

[0734] As an example, the handover request confirmation message includes the global identifier (Global ID) of the first target cell.

[0735] As an example, the handover request message is a HANDOVER REQUEST message; the handover request confirmation message is a HANDOVER REQUEST ACKNOWLEDGE message.

[0736] As an example, the handover request message is a HANDOVER REQUEST message, which includes a Conditional Handover Information Request IE; the handover request confirmation message is a HANDOVER REQUEST ACKNOWLEDGE message, which includes a Conditional Handover Information Acknowledge IE.

[0737] As an example, the auxiliary node addition request message is transmitted through the Xn interface.

[0738] As an example, the auxiliary node addition request message is transmitted via the X2 interface.

[0739] As an example, the auxiliary node addition request confirmation message is transmitted through the Xn interface.

[0740] As an example, the auxiliary node addition request confirmation message is transmitted via the X2 interface.

[0741] As an example, the auxiliary node add request message is used to request resources to be prepared for the dual connectivity operation of the first node U01.

[0742] As an example, the auxiliary node add request message is used to request the addition of a target SN.

[0743] As an example, the auxiliary node addition request message includes an SN Addition Request message.

[0744] As an example, the auxiliary node add request message includes the S-NODE ADDITION REQUEST message.

[0745] As an example, the auxiliary node addition request message includes the SN UE X2AP ID.

[0746] As an example, the auxiliary node add request message includes a PDU Session ID.

[0747] As an example, the secondary node addition request message includes the S-NG-RAN node SecurityKey.

[0748] As an example, the auxiliary node add request confirmation message is used to confirm the addition preparation of the fourth node N04 to the third node N03.

[0749] As an example, the auxiliary node add request acknowledgment message includes the SN Addition RequestAcknowledge message.

[0750] As an example, the auxiliary node add request confirmation message includes the S-NODE ADDITION REQUESTACKNOWLEDGE message.

[0751] As an example, the auxiliary node add request confirmation message includes an indication of full RRC configuration or deltaRRC configuration.

[0752] As an example, the auxiliary node add request confirmation message includes a PDU Session Resources Admitted To Be Added List.

[0753] As an example, the secondary node addition request confirmation message includes M-NG-RAN node UE XnAPID.

[0754] As an example, the auxiliary node addition request confirmation message includes a PDU Session ID.

[0755] As an example, the auxiliary node addition request confirmation message includes a CG-Config message.

[0756] As one embodiment, the phrase "the switching request message indirectly triggers the switching request confirmation message" includes: the switching request message being used to trigger a secondary node add request message; the secondary node add request message being used to trigger a secondary node add request confirmation message; and the secondary node add request confirmation message being used to trigger the switching request confirmation message.

[0757] As an example, in response to the handover request message being received by the third node N03, the third node N03 sends the auxiliary node add request message to the fourth node N04; in response to the auxiliary node add request message being received by the fourth node N04, the fourth node N04 sends the auxiliary node add request confirmation message to the third node N03; in response to the auxiliary node add request confirmation message being received by the third node N03, the third node N03 sends the handover request confirmation message to the second node N02; in response to the handover request confirmation message being received by the second node N02, the second node N02 sends the first signaling to the first node U01.

[0758] Example 9

[0759] Example 9 illustrates a wireless signal transmission flowchart of the first signaling according to another embodiment of this application, as shown in the attached diagram. Figure 9 As shown. It should be noted that the order in this example does not limit the order of signal transmission and implementation in this application.

[0760] for First node U01 In step S9101, a first signaling is received, the first signaling being used for mobility control, and the first signaling being used to indicate at least a first target cell and a second target cell.

[0761] for Second node N02 In step S9201, a handover request message is sent; in step S9202, a handover request confirmation message is received; and in step S9203, a first signaling is sent.

[0762] for Third node N03 In step S9301, a handover request message is received; in step S9302, a handover request confirmation message is sent.

[0763] In Embodiment 9, a handover request message is used to trigger a handover request confirmation message; the handover request confirmation message is used to trigger the first signaling.

[0764] As an example, the second node N02 is the sustaining base station of the first cell, and the first cell is the source PCell.

[0765] As an example, the third node N03 is the sustaining base station of the first target cell, and the first target cell is a target PCell.

[0766] As an example, the fourth node in this application is configured.

[0767] As an example, the fourth node in this application is the sustaining base station of the second target cell, and the second target cell is a source PSCell.

[0768] As an example, in response to the handover request message being received by the third node N03, the third node N03 adds a target SN.

[0769] As an example, in response to the handover request message being received by the third node N03, the third node N03 did not add a target SN.

[0770] As an example, in response to the handover request confirmation message being received by the second node N02, the second node N02 releases the source SN.

[0771] As an example, in response to the handover request confirmation message being received by the second node N02, the second node N02 does not release the source SN.

[0772] Example 10

[0773] Example 10 illustrates a wireless signal transmission flowchart in which the first handshake process is successfully completed according to an embodiment of this application, as shown in the attached diagram. Figure 10 As shown. It should be noted that the order in this example does not limit the order of signal transmission and implementation in this application.

[0774] for First node U01 In step S10101, it is determined that the first handshake process has been successfully completed; in step S10102, the second signaling is sent.

[0775] for Second node N02 In step S10201, a handover success message is received; in step S10202, a secondary node release request message is sent; in step S10203, as a response to the sending of the secondary node release request message, a secondary node release request confirmation message is received.

[0776] for Third node N03 In step S10301, the second signaling is received; in step S10302, as a response to the receipt of the second signaling, a handover success message is sent.

[0777] for Fourth node N04 In step S10401, a secondary node release request message is received, wherein the first field in the secondary node release request message is used to indicate the primary cell handover; in step S10402, as a response to the receipt of the secondary node release request message, a secondary node release request confirmation message is sent.

[0778] In Example 10, the handover success message is used to trigger the secondary node release request message; the handover success message is used to notify that the primary cell handover has been successfully completed; the first field in the secondary node release request message is used to indicate the primary cell handover; and the second signaling is used to confirm that the primary cell handover has been successfully completed.

[0779] As an example, the second node N02 is the sustaining base station of the first cell, and the first cell is the source PCell.

[0780] As an example, the third node N03 is the sustaining base station of the first target cell, and the first target cell is a target PCell.

[0781] As an example, the fourth node N04 is the sustaining base station of the second target cell, and the second target cell is a source PSCell.

[0782] As an example, the fourth node N04 is the sustaining base station of the second target cell.

[0783] As an example, the second signaling is the RRCReconfigurationComplete message.

[0784] As one example, the first signaling is used to trigger the second signaling.

[0785] As one example, the primary cell handover is performed to trigger the second signaling.

[0786] As one example, in response to the receipt of the second signaling, the handover success message is sent.

[0787] As an example, the auxiliary node release request message is transmitted through the Xn interface.

[0788] As an example, the auxiliary node release request message is transmitted via the X2 interface.

[0789] As an example, the auxiliary node release request confirmation message is transmitted through the Xn interface.

[0790] As an example, the auxiliary node release request confirmation message is transmitted via the X2 interface.

[0791] As an example, the auxiliary node release request message is an SN Release Request message.

[0792] As an example, the secondary node release request message is an S-NODE RELEASE REQUEST message.

[0793] As an example, the auxiliary node release request message is used to request the release of resources.

[0794] As an example, the auxiliary node release request message includes a UE Context Kept Indicator to instruct the fourth node N04 to retain the UE Context of the first node U01.

[0795] As an example, the auxiliary node release request message does not include the UE Context KeptIndicator.

[0796] As an example, the auxiliary node release request confirmation message is used to confirm the request to release resources.

[0797] As an example, the secondary node release request confirmation message is an S-NODE RELEASE REQUESTACKNOWLEDGE message.

[0798] As an example, the auxiliary node release request confirmation message includes a PDU sessions To BeReleased List.

[0799] As an example, the first field is a field in Cause IE.

[0800] As an example, the first field is the Radio Network Layer Cause field in Cause IE.

[0801] As an example, the first field is used to indicate MCG mobility.

[0802] As an example, the value of the first domain is set to MN mobility.

[0803] As an example, in response to the second node N02 receiving the successful handover message, the second node N02 sends the auxiliary node release request message; in response to the fourth node N04 receiving the auxiliary node release request message, the fourth node N04 sends the auxiliary node release request confirmation message.

[0804] As an example, the dashed box F10.1 is optional.

[0805] As an example, the dashed box F10.1 is present.

[0806] As an example, the dashed box F10.1 does not exist.

[0807] As an example, the dashed box F10.2 is optional.

[0808] As an example, the dashed box F10.2 is present.

[0809] As an example, the dashed box F10.2 does not exist.

[0810] As an example, at least the former of the dashed box F10.1 or the dashed box 10.2 is present.

[0811] As an example, neither the dashed box F10.1 nor the dashed box 10.2 exists.

[0812] Example 11

[0813] Example 11 illustrates a flowchart of a second handshake process successfully completed according to an embodiment of this application, as shown in the attached diagram. Figure 11 As shown.

[0814] In Example 11, in step S1101, it is determined that the second handshake process has been successfully completed; in step S1102, as a response to the successful completion of the second handshake process, the target process is executed.

[0815] As an example, if the first message is physical layer signaling; the first message includes at least a random access preamble, and the action execution target process includes: initiating a first recovery process, wherein initiating the first recovery process includes at least one of the following actions:

[0816] - Send an MCGFailureInformation message;

[0817] - Suspend all SRBs and DRBs in the MCG transmission except for SRB0;

[0818] -. Reset the MAC entity of MCG;

[0819] As an example, if the second message is used to release the RRC connection, the action execution target process includes: releasing the RRC connection, wherein releasing the RRC connection includes at least one of the following actions:

[0820] - Enter the RRC idle (RRC_IDLE) state;

[0821] -. Reset the MAC entity;

[0822] - Release all wireless resources;

[0823] - Release the RLC entity;

[0824] - Release the BAP entity;

[0825] - Release the MAC configuration, associated PDCP entities, and SDAP of all established RB and BH RLC channels.

[0826] As an example, if the second message is used to suspend an RRC connection, the action execution target process includes: suspending the RRC connection, wherein suspending the RRC connection includes at least one of the following actions:

[0827] - Apply suspendConfig;

[0828] -. Reset the MAC entity;

[0829] - Reconstruct the RLC entity of SRB1;

[0830] - Enter the RRC inactive (RRC_INACTIVE) state;

[0831] - Suspend all SRBs except SRB0.

[0832] As an example, if the second message is used for mobility control, the behavior execution target process includes: performing a handover process based on the second message, wherein the behavior of performing the handover process based on the second message includes at least one of the following behaviors:

[0833] - Perform synchronous reconfiguration based on the second message;

[0834] -. Initiate T304 and set the value of T304 to the value of t304 in the second message;

[0835] - Start synchronizing the downlink to the third target cell;

[0836] - Apply the BCCH configuration of the third target cell;

[0837] - Initiate a random access procedure on the third target cell.

[0838] As an example, if the second message is used for bearer type conversion, the behavior execution target process includes: performing a bearer type conversion process, wherein the behavior execution bearer type conversion process includes at least one of the following behaviors:

[0839] -. Designate the second target cell as PCell and the first target cell as PSCell;

[0840] -. The cell group to which the first target cell belongs is designated as the MCG, and the cell group to which the second target cell belongs is designated as the SCG;

[0841] Example 12

[0842] Example 12 illustrates a flowchart illustrating a scenario where either the first handshake process or the second handshake process according to an embodiment of this application fails to complete successfully, as shown in the attached diagram. Figure 12 As shown.

[0843] for First node U01 In step S12101, it is determined that either the first handshake process or the second handshake process has not been successfully completed; in step S12102, a third signaling is sent in response to the RRC connection re-establishment process being initiated; in step S12103, a fourth signaling is received; in step S12103, a fifth signaling is sent.

[0844] for Fifth node N05 In step S12501, the third signaling is received; in step S12502, the fourth signaling is sent; and in step S12503, the fifth signaling is received.

[0845] In Example 12, the third signaling, the fourth signaling, and the fifth signaling are used in the RRC connection re-establishment process; the third signaling is used to request RRC connection re-establishment; the third signaling triggers the fourth signaling; and the fourth signaling triggers the fifth signaling.

[0846] As an example, the fifth node N05 is the cell maintenance base station determined by cell selection.

[0847] As an example, the fifth node N05 is the same as one of the second node N02, the third node, or the fourth node in this application.

[0848] As an example, the fifth node N05 is different from any of the second node N02, the third node, or the fourth node in this application.

[0849] As an example, the first node U01 is not configured with a CHO candidate cell.

[0850] As an example, the first node U01 is configured with at least one CHO candidate cell, and attemptCondReconfig is not configured.

[0851] As an example, the first node U01 is configured with at least one CHO candidate cell, is configured with attemptCondReconfig, and the cell determined by cell selection is not one of the at least one CHO candidate cells.

[0852] As an example, the first node U01 is not configured with a DAPS bearer.

[0853] As an example, the AS (Access Stratum) security of the first node U01 is activated.

[0854] As an example, SRB2 and at least one DRB are established.

[0855] As an example, SRB2 is established, or at least one DRB is established.

[0856] As an example, the AS security of the first node U01 is activated, and at least one of SRB2 or at least one DRB is established.

[0857] As an example, the third signaling is used to request the re-establishment of the RRC connection.

[0858] As an example, the fourth signaling is used to rebuild or establish SRB1.

[0859] As an example, the fifth signaling is used to confirm that the RRC connection re-establishment has been successfully completed or that the RRC connection has been established.

[0860] As an example, in response to the failure of either the first handshake process or the second handshake process to be completed successfully, the RRC connection re-establishment process is initiated.

[0861] As an example, the action of performing the RRC connection re-establishment process includes: initiating the RRC connection re-establishment process.

[0862] As an example, the behavior of performing the RRC connection re-establishment process includes: sending the third signaling, or receiving the fourth signaling, or sending at least one of the fifth signaling.

[0863] As an example, the third signaling is an RRC message.

[0864] As an example, the signaling radio bearer of the third signaling is SRB0.

[0865] As an example, the third signaling includes a reestablishmentCause IE, which indicates the reason for triggering the RRC connection re-establishment.

[0866] As an example, the third signaling includes a ue-Identity field, which indicates the first node U01's C-RNTI (Cell RNTI), the first cell's PCI, and ShortMAC-I in the first cell.

[0867] As an example, the third signaling is an RRCReestablishmentRequest message, the fourth signaling is an RRCReestablishment message, and the fifth signaling is an RRCReestablishmentComplete message.

[0868] As an example, the third signaling is an RRCReestablishmentRequest message, the fourth signaling is an RRCSetup message, and the fifth signaling is an RRCSetupComplete message.

[0869] As an example, the fourth signaling is used to reconstruct SRB1.

[0870] As an example, the fourth signaling is used to establish SRB1.

[0871] As an example, the first cell is the source cell of the first node U01.

[0872] As an example, the first cell is the primary cell of the first node U01 before the first handshake process failed.

[0873] Example 13

[0874] Example 13 illustrates a structural block diagram of a processing apparatus for a first node according to an embodiment of this application; as shown in the appendix. Figure 13 As shown. In the appendix Figure 13 In the first node, the processing device 1300 includes a first receiver 1301 and a first transmitter 1302.

[0875] The first receiver 1301 receives a first signaling, which is used for mobility control and is used to indicate at least a first target cell and a second target cell.

[0876] The first transceiver performs a first handshake process for the first target cell; performs a second handshake process for the second target cell; and determines whether to initiate an RRC connection re-establishment process based on whether at least one of the first or second handshake processes is successfully completed.

[0877] In Example 13, at least the first handshake process or the second handshake process is used for primary cell handover; the start time of the first handshake process is not later than the start time of the second handshake process; the behavior of determining whether to initiate an RRC connection re-establishment process based on whether at least one of the first handshake process or the second handshake process is successfully completed includes: if neither the first handshake process nor the second handshake process is successfully completed, it is used to determine whether to initiate the RRC connection re-establishment process; if at least one of the first handshake process or the second handshake process is successfully completed, it is used to determine whether to initiate the RRC connection re-establishment process.

[0878] As one embodiment, the first transmitter 1302 transmits a first radio signal on the first target cell; the first receiver 1301 monitors a second radio signal on the first target cell; wherein, the first radio signal is used to trigger the second radio signal; whether the second radio signal is received is used to determine whether the first handshake process has been successfully completed; the receipt of the second radio signal is used to determine that the first handshake process has been successfully completed, and the non-receipt of the second radio signal is used to determine that the first handshake process has not been successfully completed; the first radio signal includes at least a random access preamble.

[0879] As one embodiment, the first transmitter 1302 starts a first timer when initiating the primary cell handover; the second radio signal is received during the operation of the first timer and used to determine that the first handshake process has been successfully completed; the expiration of the first timer is used to determine that the first handshake process has not been successfully completed.

[0880] As one embodiment, the second handshake process includes: the first transmitter 1302 sending a first message on the second target cell; the first receiver 1301 monitoring a second message in response to the sending of the first message; wherein whether the second message is received is used to determine whether the second handshake process is successfully completed; the receipt of the second message is used to determine that the second handshake process is successfully completed, and the non-receipt of the second message is used to determine that the second handshake process is not successfully completed.

[0881] As one embodiment, the first transmitter 1302 starts a second timer along with the first message; the second message is received during the operation of the second timer and is used to determine that the second handshake process has been successfully completed; the expiration of the second timer is used to determine that the second handshake process has not been successfully completed.

[0882] As an example, both the first message and the second message are RRC layer signaling; the first message includes at least a measurement report.

[0883] As one embodiment, the first message is physical layer signaling; the first message includes at least a random access preamble.

[0884] As an example, the failure of the first handshake process to complete successfully is used to trigger the first message.

[0885] As an example, the first transmitter 1302, in response to the successful completion of the first handshake process, sends a second signaling message, which is used to confirm that the primary cell handover has been successfully completed.

[0886] As one embodiment, the second signaling is used to trigger a handover success message; the handover success message is used to notify the primary cell that the handover has been successfully completed.

[0887] As an example, the handover success message is used to trigger a secondary node release request message; the release request message is used to trigger a secondary node release request confirmation message; and the first field in the secondary node release request message is used to indicate the handover of the primary cell.

[0888] As one example, the first transceiver executes the target process in response to the successful completion of the second handshake process.

[0889] As an example, a handover request message is used to trigger a handover request confirmation message; the handover request confirmation message is used to trigger the first signaling.

[0890] As one embodiment, the switchover request message is used to trigger a secondary node add request message; the secondary node add request message is used to trigger a secondary node add request confirmation message; and the secondary node add request confirmation message is used to trigger the switchover request confirmation message.

[0891] As one embodiment, the first transmitter 1302 sends a third signaling in response to the initiation of the RRC connection re-establishment process; the first receiver 1301 receives a fourth signaling in response to the transmission of the third signaling; and the first transmitter 1302 sends a fifth signaling in response to the reception of the fourth signaling. The third, fourth, and fifth signaling are used in the RRC connection re-establishment process, and the third signaling is used to request RRC connection re-establishment.

[0892] As one embodiment, the first receiver 1301 includes the appendix to this application. Figure 4 The components include antenna 452, receiver 454, multi-antenna receiver processor 458, receiver processor 456, controller / processor 459, memory 460, and data source 467.

[0893] As one embodiment, the first receiver 1301 includes the appendix to this application. Figure 4 The antenna is 452, the receiver is 454, the multi-antenna receiver processor is 458, and the receiver processor is 456.

[0894] As one embodiment, the first receiver 1301 includes the appendix to this application. Figure 4 The antenna is 452, the receiver is 454, and the receiver processor is 456.

[0895] As one embodiment, the first transmitter 1302 includes the appendix to this application. Figure 4 The components include antenna 452, transmitter 454, multi-antenna transmission processor 457, transmission processor 468, controller / processor 459, memory 460, and data source 467.

[0896] As one embodiment, the first transmitter 1302 includes the appendix to this application. Figure 4 The antenna 452, transmitter 454, multi-antenna transmission processor 457, and transmission processor 468 are included.

[0897] As one embodiment, the first transmitter 1302 includes the appendix to this application. Figure 4 The antenna is 452, the transmitter is 454, and the transmitter processor is 468.

[0898] As one embodiment, the first transceiver includes at least one of the first receiver 1301 or the first transmitter 1302.

[0899] Example 14

[0900] Example 14 illustrates a structural block diagram of a processing apparatus for a second node according to an embodiment of this application; as shown in the appendix. Figure 14 As shown. In the appendix Figure 14 In the second node, the processing device 1400 includes a second transmitter 1401 and a second receiver 1402.

[0901] The second transmitter 1401 transmits a first signaling message, which is used for mobility control and is used to indicate at least a first target cell and a second target cell.

[0902] In Example 14, a first handshake process is executed, which is for the first target cell; a second handshake process is executed, which is for the second target cell; whether at least one of the first handshake process or the second handshake process is successfully completed is used to determine whether the RRC connection re-establishment process is initiated; at least the first handshake process or the second handshake process is used for primary cell handover; the start time of the first handshake process is not later than the start time of the second handshake process; the behavior of determining whether to initiate the RRC connection re-establishment process based on whether at least one of the first handshake process or the second handshake process is successfully completed includes: either the first handshake process or the second handshake process is not successfully completed, which is used to determine whether the RRC connection re-establishment process is initiated; or at least one of the first handshake process or the second handshake process is successfully completed, which is used to determine whether the RRC connection re-establishment process is not initiated.

[0903] As one embodiment, the second transmitter 1401 sends a handover request message; the second receiver 1402 receives a handover request confirmation message; wherein, the handover request message is used to trigger the handover request confirmation message; the handover request confirmation message is used to trigger the first signaling.

[0904] As one embodiment, the switchover request message is used to trigger a secondary node add request message; the secondary node add request message is used to trigger a secondary node add request confirmation message; and the secondary node add request confirmation message is used to trigger the switchover request confirmation message.

[0905] As one embodiment, the second transmitter 1401 sends a secondary node release request message, the first field of which is used to indicate the primary cell handover; the second receiver 1402 receives a secondary node release request confirmation message in response to the transmission of the secondary node release request message.

[0906] As an example, the second receiver 1402 receives a handover success message; the handover success message is used to trigger the secondary node release request message; the handover success message is used to notify the primary cell that the handover has been successfully completed.

[0907] As an example, in response to the successful completion of the first handshake process, a second signaling is sent, which is used to confirm that the primary cell handover has been successfully completed; the second signaling is used to trigger the handover success message.

[0908] As one embodiment, the first handshake process includes: a first radio signal being transmitted on the first target cell; a second radio signal being monitored on the first target cell; the first radio signal being used to trigger the second radio signal; whether the second radio signal is received being used to determine whether the first handshake process has been successfully completed; the second radio signal being received being used to determine that the first handshake process has been successfully completed, and the second radio signal not being received being used to determine that the first handshake process has not been successfully completed; the first radio signal includes at least a random access preamble.

[0909] As an example, a first timer is started when the primary cell handover is initiated; the second radio signal is received during the operation of the first timer and used to determine that the first handshake process has been successfully completed; the expiration of the first timer is used to determine that the first handshake process has not been successfully completed.

[0910] As one embodiment, the second handshake process includes: a first message being sent on the second target cell; a second message being monitored in response to the sending of the first message; whether the second message is received is used to determine whether the second handshake process has been successfully completed; the receipt of the second message is used to determine that the second handshake process has been successfully completed, and the non-receipt of the second message is used to determine that the second handshake process has not been successfully completed.

[0911] As an example, a second timer is started along with the first message; the second message is received during the operation of the second timer and used to determine that the second handshake process has been successfully completed; the expiration of the second timer is used to determine that the second handshake process has not been successfully completed.

[0912] As an example, in response to the successful completion of the second handshake process, the target process is executed.

[0913] As one embodiment, the second receiver 1402 receives a third message; the second transmitter 1401 sends a fourth message; wherein, the first message triggers the third message; the third message triggers the fourth message; the fourth message triggers the second message; the third message includes the first message; and the fourth message includes the second message.

[0914] As one embodiment, the second transmitter 1401 includes the appendix to this application. Figure 4The antenna 420, transmitter 418, multi-antenna transmission processor 471, transmission processor 416, controller / processor 475, and memory 476 are included.

[0915] As one embodiment, the second transmitter 1401 includes the appendix to this application. Figure 4 The antenna 420, transmitter 418, multi-antenna transmission processor 471, and transmission processor 416 are included.

[0916] As one embodiment, the second transmitter 1401 includes the appendix to this application. Figure 4 The antenna is 420, the transmitter is 418, and the transmitter processor is 416.

[0917] As one embodiment, the second receiver 1402 includes the appendix to this application. Figure 4 The antenna 420, receiver 418, multi-antenna receiver processor 472, receiver processor 470, controller / processor 475, and memory 476 are included.

[0918] As one embodiment, the second receiver 1402 includes the appendix to this application. Figure 4 The antenna 420, receiver 418, multi-antenna receiver processor 472, and receiver processor 470 are included.

[0919] As one embodiment, the second receiver 1402 includes the appendix to this application. Figure 4 The antenna is 420, the receiver is 418, and the receiver processor is 470.

[0920] Example 15

[0921] Example 15 illustrates a structural block diagram of a processing apparatus for a third node according to an embodiment of this application; as shown in the appendix. Figure 15 As shown. In the appendix Figure 15 In the process, the processing device 1500 in the third node includes a third receiver 1501 and a third transmitter 1502.

[0922] The third receiver 1501 receives the handover request message;

[0923] The third transmitter, 1502, sent a handover request confirmation message;

[0924] In Example 15, a first signaling message is sent, which is used for mobility control and to indicate at least a first target cell and a second target cell; a first handshake process is executed, which is directed to the first target cell; a second handshake process is executed, which is directed to the second target cell; whether at least one of the first handshake process or the second handshake process is successfully completed is used to determine whether an RRC connection re-establishment process is initiated; at least the former of the first handshake process or the second handshake process is used for primary cell handover; the start time of the first handshake process is not later than the start time of the second handshake process; the behavior of determining whether to initiate an RRC connection re-establishment process based on whether at least one of the first handshake process or the second handshake process is successfully completed includes: either the first handshake process or the second handshake process is not successfully completed, which is used to determine that the RRC connection re-establishment process is initiated; or at least one of the first handshake process or the second handshake process is successfully completed, which is used to determine that the RRC connection re-establishment process is not initiated; the handover request message is used to trigger the handover request confirmation message; and the handover request confirmation message is used to trigger the first signaling message.

[0925] As one embodiment, the third transmitter 1502 sends a secondary node add request message in response to the receiving of the handover request message; the third receiver 1501 receives a secondary node add request confirmation message in response to the sending of the secondary node add request message; wherein, the secondary node add request confirmation message is used to trigger the handover request confirmation message.

[0926] As one embodiment, the third receiver 1501 monitors a first wireless signal; the third transmitter 1502 determines whether to send a second wireless signal based on whether the first wireless signal is received; wherein, the first wireless signal is used to trigger the second wireless signal; whether the second wireless signal is received is used to determine whether the first handshake process has been successfully completed; the receipt of the second wireless signal is used to determine that the first handshake process has been successfully completed, and the non-receipt of the second wireless signal is used to determine that the first handshake process has not been successfully completed; the first wireless signal includes at least a random access preamble.

[0927] As an example, the third receiver 1501 receives a second signaling message; the second signaling message is used to confirm that the primary cell handover has been successfully completed.

[0928] As an example, the third transmitter 1502, in response to the receipt of the second signaling, sends a handover success message; the handover success message is used to notify that the handover of the primary cell has been successfully completed.

[0929] As an example, the handover success message is used to trigger a secondary node release request message; the release request message is used to trigger a secondary node release request confirmation message; and the first field in the secondary node release request message is used to indicate the handover of the primary cell.

[0930] As one embodiment, the second handshake process includes: a first message being sent on the second target cell; a second message being monitored in response to the sending of the first message; whether the second message is received is used to determine whether the second handshake process has been successfully completed; the receipt of the second message is used to determine that the second handshake process has been successfully completed, and the non-receipt of the second message is used to determine that the second handshake process has not been successfully completed.

[0931] As one embodiment, the third receiver 1501 receives a third message; the third transmitter 1502 sends a fourth message; wherein the first message triggers the third message; the third message triggers the fourth message; the fourth message triggers the second message; the third message includes the first message; and the fourth message includes the second message.

[0932] As one embodiment, the third transmitter 1502 includes the appendix to this application. Figure 4 The antenna 420, transmitter 418, multi-antenna transmission processor 471, transmission processor 416, controller / processor 475, and memory 476 are included.

[0933] As one embodiment, the third transmitter 1502 includes the appendix to this application. Figure 4 The antenna 420, transmitter 418, multi-antenna transmission processor 471, and transmission processor 416 are included.

[0934] As one embodiment, the third transmitter 1502 includes the appendix to this application. Figure 4 The antenna is 420, the transmitter is 418, and the transmitter processor is 416.

[0935] As one embodiment, the third receiver 1501 includes the appendix to this application. Figure 4 The antenna 420, receiver 418, multi-antenna receiver processor 472, receiver processor 470, controller / processor 475, and memory 476 are included.

[0936] As one embodiment, the third receiver 1501 includes the appendix to this application. Figure 4 The antenna 420, receiver 418, multi-antenna receiver processor 472, and receiver processor 470 are included.

[0937] As one embodiment, the third receiver 1501 includes the appendix to this application. Figure 4 The antenna is 420, the receiver is 418, and the receiver processor is 470.

[0938] Example 16

[0939] Example 16 illustrates a structural block diagram of a processing apparatus for a fourth node according to an embodiment of this application; as shown in the appendix. Figure 16 As shown. In the appendix Figure 16 In the fourth node, the processing device 1600 includes a fourth receiver 1601 and a fourth transmitter 1602.

[0940] Fourth receiver 1601 monitors the first message;

[0941] The fourth transmitter 1602 determines whether to send a second message based on whether the first message has been received;

[0942] In Example 16, a first signaling is sent, the first signaling is used for mobility control, and the first signaling is used to indicate at least a first target cell and a second target cell; a first handshake process is executed, the first handshake process is for the first target cell; a second handshake process is executed, the second handshake process is for the second target cell; whether at least one of the first handshake process or the second handshake process is successfully completed is used to determine whether an RRC connection re-establishment process is initiated; at least the first handshake process or the second handshake process is used for primary cell handover; the start time of the first handshake process is not later than the start time of the second handshake process; the behavior of determining whether to initiate an RRC connection re-establishment process based on whether at least one of the first handshake process or the second handshake process is successfully completed includes: either the first handshake process or the second handshake process is not successfully completed, which is used to determine that the RRC connection re-establishment process is initiated; either the first handshake process or the second handshake process is successfully completed, which is used to determine that the RRC connection re-establishment process is not initiated; whether the second message is received is used to determine whether the second handshake process is successfully completed; the second message is received, which is used to determine that the second handshake process is successfully completed; the second message is not received, which is used to determine that the second handshake process is not successfully completed.

[0943] As an example, a handover request message is used to trigger a handover request confirmation message; the handover request confirmation message is used to trigger the first signaling.

[0944] As one embodiment, the fourth receiver 1601 receives a secondary node add request message; the fourth transmitter 1602, in response to the receipt of the secondary node add request message, sends a secondary node add request confirmation message; the handover request message is used to trigger the secondary node add request message; the secondary node add request confirmation message is used to trigger the handover request confirmation message.

[0945] As one embodiment, the fourth receiver 1601 receives a secondary node release request message, wherein the first field in the secondary node release request message is used to indicate the primary cell handover; the fourth transmitter 1602, in response to the receipt of the secondary node release request message, sends a secondary node release request confirmation message.

[0946] As an example, the handover success message is used to trigger the secondary node release request message; the second signaling is used to trigger the handover success message; the handover success message is used to notify the primary cell that the handover has been successfully completed; and the second signaling is used to confirm that the primary cell handover has been successfully completed.

[0947] As one embodiment, the fourth transmitter 1602 sends a third message in response to the receipt of the first message; the fourth receiver 1601 receives the fourth message in response to the sending of the third message; wherein the first message triggers the third message; the third message triggers the fourth message; the fourth message triggers the second message; the third message includes the first message; and the fourth message includes the second message.

[0948] As one embodiment, the fourth transmitter 1602 includes the appendix to this application. Figure 4 The antenna 420, transmitter 418, multi-antenna transmission processor 471, transmission processor 416, controller / processor 475, and memory 476 are included.

[0949] As one embodiment, the fourth transmitter 1602 includes the appendix to this application. Figure 4 The antenna 420, transmitter 418, multi-antenna transmission processor 471, and transmission processor 416 are included.

[0950] As one embodiment, the fourth transmitter 1602 includes the appendix to this application. Figure 4 The antenna is 420, the transmitter is 418, and the transmitter processor is 416.

[0951] As one embodiment, the fourth receiver 1601 includes the appendix to this application. Figure 4 The antenna 420, receiver 418, multi-antenna receiver processor 472, receiver processor 470, controller / processor 475, and memory 476 are included.

[0952] As one embodiment, the fourth receiver 1601 includes the appendix to this application. Figure 4 The antenna 420, receiver 418, multi-antenna receiver processor 472, and receiver processor 470 are included.

[0953] As one embodiment, the fourth receiver 1601 includes the appendix to this application. Figure 4 The antenna is 420, the receiver is 418, and the receiver processor is 470.

[0954] Example 17

[0955] Example 17 illustrates flowcharts of the third and fourth messages according to an embodiment of this application, as shown in the attached diagram. Figure 17 As shown.

[0956] for Fourth node U04 In step S17401, a first message is received; in step S17402, a third message is sent in response to the receipt of the first message; in step S17403, a fourth message is received in response to the sending of the third message; and in step S17404, a second message is sent in response to the receipt of the fourth message.

[0957] for Node 6 N06 In step S17601, the third message is received; in step S17602, the fourth message is sent.

[0958] In Example 17, the first message triggers the third message; the third message triggers the fourth message; the fourth message triggers the second message; the third message includes the first message; and the fourth message includes the second message.

[0959] As an example, the sixth node N06 is the second node in this application.

[0960] As an example, the sixth node N06 is the third node in this application.

[0961] As an example, the first message is included in a container within the third message.

[0962] As an example, the second message is included in one of the containers of the fourth message.

[0963] As one embodiment, the third message carries all or part of the first message.

[0964] As one embodiment, the fourth message carries all or part of the second message.

[0965] As an example, the third message is transmitted via the Xn interface.

[0966] As an example, the third message is transmitted via the X2 interface.

[0967] As an example, the fourth message is transmitted via the Xn interface.

[0968] As an example, the fourth message is transmitted via the X2 interface.

[0969] Those skilled in the art will understand that all or part of the steps in the above methods can be implemented by a program instructing related hardware, and the program can be stored in a computer-readable storage medium, such as a read-only memory, hard disk, or optical disk. Optionally, all or part of the steps in the above embodiments can also be implemented using one or more integrated circuits. Accordingly, each module unit in the above embodiments can be implemented in hardware or in the form of software functional modules. This application is not limited to any specific combination of software and hardware. The user equipment, terminal, and UE in this application include, but are not limited to, drones, communication modules on drones, remote-controlled aircraft, aircraft, small aircraft, mobile phones, tablets, laptops, vehicle-mounted communication devices, wireless sensors, internet cards, IoT terminals, RFID terminals, NB-IoT terminals, MTC (Machine Type Communication) terminals, eMTC (enhanced MTC) terminals, data cards, internet cards, vehicle-mounted communication devices, low-cost mobile phones, low-cost tablets, and other wireless communication devices. The base station or system equipment in this application includes, but is not limited to, macrocell base stations, microcell base stations, home base stations, relay base stations, gNB (NR Node B), TRP (Transmitter Receiver Point), and other wireless communication equipment.

[0970] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A first node used for wireless communication, characterized in that, include: A first receiver receives a first signaling message, the first signaling message being used for mobility control, and the first signaling message being used to indicate at least a first target cell and a second target cell; The first transmitter performs a first handshake process, which is directed at the first target cell. Simultaneously, a second handshake process is performed, which is directed at the second target cell; Whether to initiate an RRC connection re-establishment process depends on whether at least one of the first handshake process or the second handshake process is successfully completed. Wherein, at least the first handshake process or the second handshake process is used for primary cell handover; the start time of the first handshake process is not later than the start time of the second handshake process; determining whether to initiate an RRC connection re-establishment process based on whether at least one of the first handshake process or the second handshake process is successfully completed includes: if either the first handshake process or the second handshake process is not successfully completed, it is used to determine whether to initiate the RRC connection re-establishment process; if at least one of the first handshake process or the second handshake process is successfully completed, it is used to determine whether to initiate the RRC connection re-establishment process.

2. The first node according to claim 1, characterized in that, The first handshake process includes: The first transmitter transmits a first wireless signal on the first target cell; The first receiver monitors the second wireless signal on the first target cell; Wherein, the first wireless signal is used to trigger the second wireless signal; whether the second wireless signal is received is used to determine whether the first handshake process is successfully completed; the receipt of the second wireless signal is used to determine that the first handshake process is successfully completed, and the non-receipt of the second wireless signal is used to determine that the first handshake process is not successfully completed; the first wireless signal includes at least a random access preamble.

3. The first node according to claim 1 or 2, characterized in that, The second handshake process includes: The first transmitter sends a first message on the second target cell; The first receiver, in response to the transmission of the first message, monitors the second message; In this process, whether the second message is received is used to determine whether the second handshake process has been successfully completed; the receipt of the second message is used to determine that the second handshake process has been successfully completed, and the non-receipt of the second message is used to determine that the second handshake process has not been successfully completed.

4. The first node according to claim 3, characterized in that, Both the first message and the second message are RRC layer signaling; the first message includes at least a measurement report.

5. The first node according to claim 3, characterized in that, The first message is physical layer signaling; the first message includes at least a random access preamble.

6. The first node according to claim 1 or 2, characterized in that, include: The first transmitter, in response to the successful completion of the first handshake process, sends a second signaling message, which is used to confirm that the primary cell handover has been successfully completed; Wherein, the second signaling is used to trigger a handover success message; the handover success message is used to notify that the primary cell handover has been successfully completed; the handover success message is used to trigger a secondary node release request message; the release request message is used to trigger a secondary node release request confirmation message; the first field in the secondary node release request message is used to indicate the primary cell handover.

7. A method used in a first node of wireless communication, characterized in that, include: Receive first signaling, the first signaling being used for mobility control, the first signaling being used to indicate at least a first target cell and a second target cell; Perform the first handshake process, which is directed at the first target cell; Simultaneously, a second handshake process is performed, which is directed at the second target cell; Whether to initiate an RRC connection re-establishment process depends on whether at least one of the first handshake process or the second handshake process is successfully completed. Wherein, at least the first handshake process or the second handshake process is used for primary cell handover; the start time of the first handshake process is not later than the start time of the second handshake process; determining whether to initiate an RRC connection re-establishment process based on whether at least one of the first handshake process or the second handshake process is successfully completed includes: if either the first handshake process or the second handshake process is not successfully completed, it is used to determine whether to initiate the RRC connection re-establishment process; if at least one of the first handshake process or the second handshake process is successfully completed, it is used to determine whether to initiate the RRC connection re-establishment process.

8. The method in the first node according to claim 7, characterized in that, The first handshake process includes: Transmit a first wireless signal on the first target cell; Monitor the second wireless signal on the first target cell; Wherein, the first wireless signal is used to trigger the second wireless signal; whether the second wireless signal is received is used to determine whether the first handshake process is successfully completed; the receipt of the second wireless signal is used to determine that the first handshake process is successfully completed, and the non-receipt of the second wireless signal is used to determine that the first handshake process is not successfully completed; the first wireless signal includes at least a random access preamble.

9. The method in the first node according to claim 7 or 8, characterized in that, The second handshake process includes: Send the first message on the second target cell; In response to the sending of the first message, monitor the second message; In this process, whether the second message is received is used to determine whether the second handshake process has been successfully completed; the receipt of the second message is used to determine that the second handshake process has been successfully completed, and the non-receipt of the second message is used to determine that the second handshake process has not been successfully completed.

10. The method in the first node according to claim 9, characterized in that, include: Both the first message and the second message are RRC layer signaling; the first message includes at least a measurement report.

11. The method in the first node according to claim 9, characterized in that, include: The first message is physical layer signaling; the first message includes at least a random access preamble.

12. The method in the first node according to claim 7 or 8, characterized in that, include: In response to the successful completion of the first handshake process, a second signaling is sent, which is used to confirm that the primary cell handover has been successfully completed; Wherein, the second signaling is used to trigger a handover success message; the handover success message is used to notify that the primary cell handover has been successfully completed; the handover success message is used to trigger a secondary node release request message; the release request message is used to trigger a secondary node release request confirmation message; the first field in the secondary node release request message is used to indicate the primary cell handover.

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