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 sets a first counter to an initial value in response to any condition in a first set of conditions being satisfied; the first set of conditions includes at least one of a first condition or a second condition or a third condition or a fourth condition; the first condition depends on the first MAC entity reset; the second condition includes the first cell group being deactivated; the third condition includes a second random access procedure being successfully completed, the second random access procedure being a random access procedure initiated at the first MAC entity before the first random access procedure; the fourth condition depends on receiving a target DCI on a second cell, the second cell not being the first cell.

Description

Technical Field

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

[0002] With the continuous development of wireless communication, the requirements for mobility, transmission latency, and system capacity are becoming increasingly stringent. In addition to improvements to traditional L3 handover, the 3GPP RAN (Radio Access Network) #94e meeting decided to study L1 / L2 Triggered Mobility (LTM) in the "Further NR mobility enhancements" work item (WI). To shorten transmission interruption time, triggering a random access procedure on LTM candidate cells via PDCCH order to obtain Timing Advance (TA) for early uplink synchronization is a key technology.

[0003] During random access, the calculation of the target received power depends on the preamble power ramping step and the preamble power ramping counter. Summary of the Invention

[0004] In traditional solutions, the preamble power rise counter is reset during the initialization of the random access procedure. The inventors have found that with the further enhancement of current mobility, the preamble power rise counter reset scenario relies too heavily on the initialization of the random access procedure, making it difficult to meet the needs of today's fast handover and complex and ever-changing scenarios. Therefore, this invention proposes a method for resetting the preamble power rise counter, which improves the flexibility of the preamble power rise counter, increases the accuracy of power transmission, and reduces unnecessary power waste.

[0005] To address the aforementioned problems, this application provides a solution for counter reset. While the NR system is used as an example in the problem description, this application is also applicable to scenarios such as LTE (Long-Term Evolution), LTE-A (Long-Term Evolution Advanced), or future 6G systems, achieving similar technical effects to NR systems. Furthermore, although this application provides specific implementation methods for scenarios such as LTM, CHO, and CPC, it can also be used in scenarios such as legacy handover, achieving similar technical effects. Furthermore, although this application provides specific implementation methods for scenarios involving mobility management, it can also be used in scenarios such as m-TRP and m-TA, achieving similar technical effects. Furthermore, although this application provides specific implementation methods for random access procedures, it can also be used in scenarios with procedures equivalent to random access procedures, achieving similar technical effects. Furthermore, although this application provides specific implementation methods for random access procedures triggered by DCI (Downlink Control Information), it can also be used in scenarios where random access procedures are triggered by the UE, achieving similar technical effects. Furthermore, adopting a unified design scheme for different scenarios helps reduce hardware complexity and cost. Furthermore, although this application was initially intended for the Uu air interface, it can also be used for the PC5 interface, achieving similar technical effects. Furthermore, although this application was initially intended for terminal-to-base station scenarios, it is also applicable to V2X (Vehicle-to-Everything) scenarios, communication scenarios between terminals and relays, and communication scenarios between relays and base stations, achieving similar technical effects. Furthermore, although this application was initially intended for terminal-to-base station scenarios, it is also applicable to IAB (Integrated Access and Backhaul) communication scenarios, achieving similar technical effects. Furthermore, although this application was initially intended for terrestrial network (TN) scenarios, it is also applicable to non-terrestrial network (NTN) communication scenarios, achieving similar technical effects to those in TN scenarios. In addition, adopting a unified solution across different scenarios helps reduce hardware complexity and cost.

[0006] As an example, the interpretation of the terminology in this application is based on the definitions in the 3GPP specification protocol TS36 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 3GPP specification protocol TS38 series.

[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] In response to the fulfillment of any condition in the first set of conditions, the first counter is set to its initial value;

[0012] The first MAC entity performs a first random access procedure on the first cell. The execution of the first random access procedure includes calculating the target received power of the first preamble according to the first counter and instructing the physical layer to send the first preamble. The first MAC entity is the MAC entity corresponding to the first cell group.

[0013] Wherein, the first set of conditions includes at least one of a first condition, a second condition, a third condition, or a fourth condition; the first condition depends on the first MAC entity being reset; the second condition includes the first cell group being deactivated; the third condition includes the successful completion of a second random access procedure, which is a random access procedure initiated by the first MAC entity before the first random access procedure; the fourth condition depends on receiving the target DCI on a second cell, which is not the first cell.

[0014] As one example, the first node is a terminal.

[0015] As an example, the problem this application aims to solve includes: when to set the first counter to an initial value.

[0016] As an example, the features of the above method include: setting a first counter to an initial value in response to the satisfaction of any condition in the first set of conditions; the first set of conditions includes at least one of a first condition, a second condition, a third condition, or a fourth condition.

[0017] As an example, the problem this application aims to solve includes: under what conditions is the first counter set to an initial value?

[0018] As an example, the features of the above method include: the first condition depends on the first MAC entity being reset; the second condition includes the first cell group being deactivated; the third condition includes the successful completion of a second random access procedure, which is a random access procedure initiated by the first MAC entity before the first random access procedure; and the fourth condition depends on receiving the target DCI on a second cell, which is not the first cell.

[0019] As an example, the advantages of the above method include: it facilitates power saving.

[0020] As an example, the advantages of the above method include: it helps to reduce signaling overhead.

[0021] As an example, the advantages of the above method include: the protocol is simple to implement.

[0022] As an example, the advantages of the above method include: improving random access performance.

[0023] According to one aspect of this application, it is characterized by comprising:

[0024] Receive a first RRC message, which indicates the configuration information of the first cell; in response to the receipt of the first RRC message, store the configuration information of the first cell in a first UE variable;

[0025] The configuration information of the first cell includes the random access information of the first cell.

[0026] As an example, the problem this application aims to solve includes: how to obtain the configuration information of the first cell.

[0027] As an example, the features of the above method include: in response to the receipt of the first RRC message, storing the configuration information of the first cell in a first UE variable; the configuration information of the first cell includes the random access information of the first cell.

[0028] As an example, the advantages of the above method include: shortening the configuration information reception time.

[0029] As an example, the advantages of the above method include: reducing transmission interruption time.

[0030] According to one aspect of this application, it is characterized by comprising:

[0031] A first DCI is received on a first serving cell. The first DCI includes a first bit block, a second bit block, and a third bit block. The first bit block in the first DCI indicates a retransmission of a preamble, the second bit block in the first DCI indicates the first preamble, and the third bit block in the first DCI indicates the first cell.

[0032] The first DCI triggers the first random access procedure.

[0033] As an example, the problem this application aims to solve includes: how to trigger the first random access procedure.

[0034] As an example, the features of the above method include: receiving a first DCI on a first serving cell, wherein the first DCI triggers the first random access procedure.

[0035] As an example, the problem this application aims to solve includes: how to instruct the retransmission of the first Preamble on the first cell.

[0036] As an example, the features of the above method include: the first DCI includes a first bit block, a second bit block and a third bit block, the first bit block in the first DCI indicates the retransmission of the Preamble, the second bit block in the first DCI indicates the first Preamble, and the third bit block in the first DCI indicates the first cell.

[0037] As an example, the advantages of the above method include: the first counter being set to an initial value does not depend on the initialization of the first random access procedure.

[0038] As an example, the advantages of the above method include: power saving when retransmitting the first Preamble.

[0039] According to one aspect of this application, it is characterized by comprising:

[0040] Receive a second DCI, the second DCI including a first bit block, a second bit block and a third bit block, the first bit block in the second DCI indicating the initial transmission or retransmission of the Preamble, the second bit block in the second DCI indicating the second Preamble, and the third bit block in the second DCI indicating the first cell.

[0041] Specifically, the first counter is set to its initial value after the second DCI is received, and the first counter is set to its initial value before the first DCI is received; the second Preamble is the last Preamble sent before the first Preamble.

[0042] As an example, the problem this application aims to solve includes: when to set the first counter to an initial value when using different Preamble transmissions.

[0043] As an example, the features of the above method include: setting the first counter to an initial value after the second DCI is received, and setting the first counter to an initial value before the first DCI is received; the second Preamble is the last Preamble sent before the first Preamble.

[0044] As an example, the advantages of the above method include: it facilitates the rapid setting of the first counter when performing multiple random access procedures.

[0045] As an example, the advantages of the above method include: saving signaling bits.

[0046] As an example, the advantages of the above method include: it facilitates the optimization of the random access procedure triggered by the PDCCH Order.

[0047] According to one aspect of this application, the first counter is not set during the initialization process of the first random access procedure.

[0048] As an example, the advantages of the above method include: improving the robustness of the random access process.

[0049] As an example, the advantages of the above method include: it helps to save transmission power.

[0050] According to one aspect of this application, the first counter is greater than the initial value before the first counter is set to the initial value.

[0051] According to one aspect of this application, the determination of the first counter depends on setting the first counter to an initial value.

[0052] As an example, the problem this application aims to solve includes: how to determine the value of the first counter.

[0053] As an example, the features of the above method include: determining the first counter depends on setting the first counter to an initial value.

[0054] According to one aspect of this application, it is characterized by comprising:

[0055] During the initialization of the first random access procedure, the first counter is always at the initial value; the fact that the first counter is always at the initial value during the initialization of the first random access procedure depends on setting the first counter to the initial value.

[0056] As an example, the problem this application aims to solve includes: how to determine the value of the first counter during the initialization process of the first random access procedure.

[0057] As an example, the features of the above method include: during the initialization process of the first random access procedure, the first counter is always at the initial value depending on setting the first counter to the initial value.

[0058] As an example, the advantages of the above method include: simplicity of implementation.

[0059] As an example, the advantages of the above method include: it helps to optimize the initialization process of the first random access procedure.

[0060] This application discloses a method used in a second node for wireless communication, characterized by comprising:

[0061] During the first random access process, the first Preamble is received;

[0062] In this context, as a response to the satisfaction of any condition in the first set of conditions, the sender of the first Preamble sets the first counter to an initial value; the first MAC entity executes the first random access procedure on the first cell, the execution of the first random access procedure including calculating the target received power of the first Preamble based on the first counter, the first MAC entity being the MAC entity corresponding to the first cell group; the first set of conditions includes at least one of a first condition, a second condition, a third condition, or a fourth condition; the first condition depends on the first MAC entity being reset; the second condition includes the first cell group being deactivated; the third condition includes the successful completion of a second random access procedure, the second random access procedure being a random access procedure initiated by the first MAC entity prior to the first random access procedure; the fourth condition depends on the sender of the first Preamble receiving the target DCI on a second cell, the second cell being not the first cell.

[0063] In one embodiment, the second node is a base station.

[0064] According to one aspect of this application, it is characterized by comprising:

[0065] The sender of the first Preamble receives a first RRC message, which indicates the configuration information of the first cell; in response to the receipt of the first RRC message, the sender of the first Preamble stores the configuration information of the first cell in a first UE variable;

[0066] The configuration information of the first cell includes the random access information of the first cell.

[0067] According to one aspect of this application, it is characterized by comprising:

[0068] The sender of the first Preamble receives the first DCI on the first serving cell. The first DCI includes a first bit block, a second bit block, and a third bit block. The first bit block in the first DCI indicates a retransmission of the Preamble, the second bit block in the first DCI indicates the first Preamble, and the third bit block in the first DCI indicates the first cell.

[0069] The first DCI triggers the first random access procedure.

[0070] According to one aspect of this application, it is characterized by comprising:

[0071] The sender of the first Preamble receives a second DCI, which includes a first bit block, a second bit block, and a third bit block. The first bit block in the second DCI indicates the initial transmission or retransmission of the Preamble, the second bit block in the second DCI indicates the second Preamble, and the third bit block in the second DCI indicates the first cell.

[0072] Specifically, the first counter is set to its initial value after the sender of the first Preamble receives the second DCI, and the first counter is set to its initial value before the sender of the first Preamble receives the first DCI; the second Preamble is the last Preamble sent before the first Preamble.

[0073] According to one aspect of this application, the first counter is not set during the initialization process of the first random access procedure.

[0074] According to one aspect of this application, the first counter is greater than the initial value before the action sets the first counter to the initial value.

[0075] According to one aspect of this application, the first counter is determined to be set to an initial value based on the behavior.

[0076] According to one aspect of this application, the first counter is always at the initial value during the initialization of the first random access procedure; the first counter always being at the initial value during the initialization of the first random access procedure depends on the behavior setting the first counter to the initial value.

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

[0078] Send a first RRC message, the first RRC message indicating the configuration information of the first cell; the configuration information of the first cell includes the random access information of the first cell;

[0079] In this context, as a response to the fulfillment of any condition in the first set of conditions, the receiver of the first RRC message sets the first counter to an initial value; the first MAC entity executes a first random access procedure on the first cell, the execution of the first random access procedure including calculating the target received power of the first preamble based on the first counter, instructing the physical layer to send the first preamble, the first MAC entity being the MAC entity corresponding to the first cell group; the first set of conditions includes at least one of a first condition, a second condition, a third condition, or a fourth condition; the first condition depends on the first MAC entity being reset; the second condition includes the first cell group being deactivated; the third condition includes the successful completion of a second random access procedure, the second random access procedure being a random access procedure initiated by the first MAC entity before the first random access procedure; the fourth condition depends on receiving the target DCI on a second cell, the second cell being not the first cell.

[0080] According to one aspect of this application, it is characterized by comprising:

[0081] A first DCI is transmitted on a first serving cell. The first DCI includes a first bit block, a second bit block, and a third bit block. The first bit block in the first DCI indicates a retransmission of the preamble, the second bit block in the first DCI indicates the first preamble, and the third bit block in the first DCI indicates the first cell.

[0082] The first DCI triggers the first random access procedure.

[0083] According to one aspect of this application, it is characterized by comprising:

[0084] A second DCI is sent, which includes a first bit block, a second bit block, and a third bit block. The first bit block in the second DCI indicates the initial transmission or retransmission of the Preamble, the second bit block in the second DCI indicates the second Preamble, and the third bit block in the second DCI indicates the first cell.

[0085] Specifically, the first counter is set to its initial value after the receiver of the second DCI receives the second DCI, and the first counter is set to its initial value before the receiver of the second DCI receives the first DCI; the second Preamble is the last Preamble sent before the first Preamble.

[0086] This application discloses a first node used for wireless communication, characterized in that it comprises:

[0087] The first processor, in response to the satisfaction of any condition in the first set of conditions, sets the first counter to an initial value;

[0088] The first MAC entity performs a first random access procedure on the first cell. The execution of the first random access procedure includes calculating the target received power of the first preamble according to the first counter and instructing the physical layer to send the first preamble. The first MAC entity is the MAC entity corresponding to the first cell group.

[0089] Wherein, the first set of conditions includes at least one of a first condition, a second condition, a third condition, or a fourth condition; the first condition depends on the first MAC entity being reset; the second condition includes the first cell group being deactivated; the third condition includes the successful completion of a second random access procedure, which is a random access procedure initiated by the first MAC entity before the first random access procedure; the fourth condition depends on receiving the target DCI on a second cell, which is not the first cell.

[0090] This application discloses a second node used for wireless communication, characterized in that it comprises:

[0091] The second receiver receives the first Preamble during the first random access process;

[0092] Wherein, a first MAC entity executes the first random access procedure on a first cell, the execution of the first random access procedure including calculating the target received power of a first preamble according to a first counter, the first MAC entity being the MAC entity corresponding to a first cell group; as a response to any condition in a first set of conditions being met, the first counter is set to an initial value; the first set of conditions includes at least one of a first condition, a second condition, a third condition, or a fourth condition; the first condition depends on the first MAC entity being reset; the second condition includes the first cell group being deactivated; the third condition includes the successful completion of a second random access procedure, the second random access procedure being a random access procedure initiated by the first MAC entity before the first random access procedure; the fourth condition depends on the sender of the first preamble receiving the target DCI on a second cell, the second cell being not the first cell.

[0093] This application discloses a third node used for wireless communication, characterized in that it comprises:

[0094] The third transmitter sends a first RRC message, which indicates the configuration information of the first cell; the configuration information of the first cell includes the random access information of the first cell.

[0095] In this context, as a response to the fulfillment of any condition in the first set of conditions, the receiver of the first RRC message sets the first counter to an initial value; the first MAC entity executes a first random access procedure on the first cell, the execution of the first random access procedure including calculating the target received power of the first preamble based on the first counter, instructing the physical layer to send the first preamble, the first MAC entity being the MAC entity corresponding to the first cell group; the first set of conditions includes at least one of a first condition, a second condition, a third condition, or a fourth condition; the first condition depends on the first MAC entity being reset; the second condition includes the first cell group being deactivated; the third condition includes the successful completion of a second random access procedure, the second random access procedure being a random access procedure initiated by the first MAC entity before the first random access procedure; the fourth condition depends on receiving the target DCI on a second cell, the second cell being not the first cell.

[0096] As an example, compared with conventional solutions, this application has at least one of the following advantages:

[0097] - It helps improve random access performance;

[0098] - It facilitates the optimization of the random access process triggered by PDCCH Order;

[0099] - It helps save UE power;

[0100] - Reduce signaling overhead;

[0101] - Simple to implement. Attached Figure Description

[0102] 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:

[0103] Figure 1 A flowchart illustrating the communication of a first node according to an embodiment of this application is shown;

[0104] Figure 2 A schematic diagram of a network architecture according to an embodiment of this application is shown;

[0105] 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;

[0106] Figure 4 A schematic diagram of a first communication device and a second communication device according to an embodiment of this application is shown;

[0107] Figure 5 A flowchart illustrating a wireless signal transmission process according to an embodiment of this application is shown;

[0108] Figure 6 A schematic diagram illustrating the conditions under which the first counter is not set according to this application is shown;

[0109] Figure 7 A schematic diagram showing the first counter being greater than the initial value according to this application is shown;

[0110] Figure 8 A schematic diagram showing the determination of the first counter according to the present application is shown;

[0111] Figure 9 A schematic diagram is shown showing that, according to this application, the first counter is always at the initial value during the initialization process of the first random access procedure;

[0112] Figure 10 A structural block diagram of a processing apparatus for a first node according to an embodiment of this application is shown;

[0113] Figure 11 A structural block diagram of a processing apparatus for a second node according to an embodiment of this application is shown;

[0114] Figure 12 A structural block diagram of a processing apparatus for a third node according to an embodiment of this application is shown. Detailed Implementation

[0115] 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.

[0116] Example 1

[0117] Example 1 illustrates a flowchart of communication of a first node 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 does not represent the chronological order of the steps they represent.

[0118] In Embodiment 1, in step 101, the first node in this application sets a first counter to an initial value in response to the satisfaction of any condition in the first condition set; in step 102, the first MAC entity performs a first random access procedure on the first cell; in step 103, performing the first random access procedure includes calculating the target received power of the first preamble based on the first counter and instructing the physical layer to send the first preamble; wherein, the first condition set includes at least one of a first condition, a second condition, a third condition, or a fourth condition; the first condition depends on the first MAC entity being reset; the second condition includes the first cell group being deactivated; the third condition includes the successful completion of a second random access procedure, which is a random access procedure initiated by the first MAC entity before the first random access procedure; the fourth condition depends on receiving the target DCI on a second cell, which is not the first cell.

[0119] As an example, the first counter is at least a PREAMBLE_POWER_RAMPING_COUNTER.

[0120] As an example, the first counter is a PREAMBLE_POWER_RAMPING_COUNTER.

[0121] As an example, in response to any condition in the first set of conditions being met, if the first counter is not the initial value, the first counter is set to the initial value.

[0122] As an example, in response to any condition in the first set of conditions being met, the first counter is set to the initial value, regardless of whether the first counter is the initial value.

[0123] As an example, in response to the satisfaction of any condition in the first set of conditions, if the first counter is the initial value, the first counter is not set.

[0124] As an example, the initial value is 1.

[0125] As an example, the initial value is greater than 1.

[0126] As an example, the initial value is a non-negative integer.

[0127] As an example, the initial value is the default.

[0128] As an example, the initial value is predefined.

[0129] As an example, the initial value is configurable.

[0130] As an example, the first cell is a stationed cell of the first node.

[0131] As an example, the first cell is a serving cell of the first node.

[0132] As an example, the first cell is the current serving cell of the first node.

[0133] As an example, the first cell is a target cell of the first node.

[0134] As an example, the first cell is a candidate cell of the first node.

[0135] As an example, the first cell is an LTM candidate cell of the PCell of the first node.

[0136] As an example, the first cell is an LTM candidate cell of the PSCell of the first node.

[0137] As an example, the first cell is a CHO candidate cell of the PCell of the first node.

[0138] As an example, the first cell is a CPAC candidate cell of the first node.

[0139] As an example, the first cell is an SCPAC candidate cell of the first node.

[0140] As an example, the first random access procedure is a 2-step random procedure.

[0141] As an example, the first random access procedure is a 4-step random procedure.

[0142] As an example, the first random access procedure is part of a 2-step random procedure.

[0143] As an example, the first random access procedure is part of a 4-step random procedure.

[0144] As one embodiment, the execution of the first random access procedure includes: determining whether the first counter has been set to an initial value.

[0145] As one embodiment, the execution of the first random access procedure includes: determining whether the first counter needs to be set to an initial value.

[0146] As an example, the execution of the first random access procedure includes: determining whether the first counter is incremented by 1 based on the initial value.

[0147] As one embodiment, the execution of the first random access procedure includes: determining whether to increment the first counter.

[0148] As one embodiment, the execution of the first random access procedure includes: determining whether the first counter is incremented by 1.

[0149] As one embodiment, the execution of the first random access procedure includes: determining the value of the first counter.

[0150] As one embodiment, the execution of the first random access procedure includes: incrementing the first counter by 1 or not incrementing the first counter by 1.

[0151] As one embodiment, the execution of the first random access procedure includes: determining whether the condition for incrementing the first counter by 1 is met; if the condition is met, the first counter is incremented by 1; otherwise, the first counter is not incremented by 1.

[0152] As an example, the condition for the first counter to increment by 1 includes: the value of the first counter is the initial value.

[0153] As an example, the condition for the first counter to increment by 1 includes: the value of the first counter is at least greater than the initial value.

[0154] As an example, the condition for the first counter to increment by 1 includes: the value of the first counter is at least greater than 1.

[0155] As an example, the condition for incrementing the first counter by 1 includes: not receiving an instruction to pause the first counter.

[0156] As an example, the condition for incrementing the first counter by 1 includes: not receiving a lower-level instruction to pause the first counter.

[0157] As an example, the condition for incrementing the first counter by 1 includes: no LBT failure indication was received from the lower layer during the previous random access process.

[0158] As an example, the condition for the first counter to increment by 1 includes: the SSB or CSI-RS selected in the first random access procedure is the same as that in the previous random access procedure.

[0159] As a sub-implementation of the above embodiments, the previous random access procedure is the most recent random access procedure initiated in time since the first random access procedure.

[0160] As a sub-implementation of the above embodiment, the previous random access process has been completed.

[0161] As a sub-example of the above embodiment, the previous random access process was unsuccessful.

[0162] As a sub-implementation of the above embodiments, the first random access procedure is a re-initiated random access procedure.

[0163] As an example, the conditions for incrementing the first counter by 1 include: the preamble of the first random access procedure is indicated by the PDCCH order, and the first random access procedure is for the retransmission of the preamble of the LTM candidate cell.

[0164] As one embodiment, the execution of the first random access procedure includes: determining PREAMBLE_RECEIVED_TARGET_POWER; the first power is the value of PREAMBLE_RECEIVED_TARGET_POWER.

[0165] As an example, the execution of the first random access procedure includes: setting the first power to preambleReceivedTargetPower+DELTA_PREAMBLE+(first counter – 1)×PREAMBLE_POWER_RAMPING_STEP+POWER_OFFSET_2STEP_RA.

[0166] As one embodiment, performing the first random access procedure includes instructing the physical layer to apply the first power.

[0167] As one embodiment, the execution of the first random access procedure includes: instructing the physical layer to apply PREAMBLE_INDEX, where the index of the first preamble is the value of PREAMBLE_INDEX.

[0168] As one embodiment, the execution of the first random access procedure includes: instructing the physical layer to apply the first power and sending the first preamble according to the first power.

[0169] As an example, the first power is used to determine the transmission power of the first Preamble.

[0170] As an example, the first cell group is an MCG.

[0171] As an example, the first cell group is an SCG.

[0172] As an example, the first cell group is a candidate SCG.

[0173] As an example, the first cell group is a deactivated SCG.

[0174] As one example, the first MAC entity is shared by multiple cells.

[0175] As an example, the multiple cells belong to the same cell group.

[0176] As an example, the multiple cells belong to different cell groups.

[0177] As an example, the plurality of cells are LTM candidate cells.

[0178] As an example, the first MAC entity is the MAC entity for the first cell group.

[0179] As an example, the first MAC entity is a MAC entity configured for the first cell group.

[0180] As an example, the first MAC entity is the MAC entity used for transmission by the first cell group.

[0181] As an example, the first MAC entity is a MAC entity created for the first cell group.

[0182] As an example, the first set of conditions includes only one of the first condition, the second condition, the third condition, or the fourth condition.

[0183] As an example, the first set of conditions includes only two of the following: a first condition, a second condition, a third condition, or a fourth condition.

[0184] As an example, the first set of conditions includes only three of the following: a first condition, a second condition, a third condition, or a fourth condition.

[0185] As an example, the first set of conditions includes a first condition, a second condition, a third condition, or a fourth condition.

[0186] As an example, the first set of conditions includes a first condition, a second condition, a third condition, and a fourth condition.

[0187] As an example, the first set of conditions is the first condition.

[0188] As an example, the first set of conditions is the second condition.

[0189] As an example, the first set of conditions is the third condition.

[0190] As an example, the first set of conditions is the fourth condition.

[0191] As an example, the first set of conditions is the first condition and the second condition.

[0192] As an example, the first set of conditions is the first condition, the second condition, and the fourth condition.

[0193] As an example, the first set of conditions is the first condition and the fourth condition.

[0194] As an example, the first set of conditions is predefined.

[0195] As an example, the first set of conditions is the default.

[0196] As an example, the first set of conditions is configurable.

[0197] As an example, the first set of conditions is configured on the network side.

[0198] As an example, the first set of conditions is configured jointly by the network side and the UE side.

[0199] As one example, the first set of conditions is modifiable. As one example, the first condition depends on the reset of the first MAC entity.

[0200] As a sub-implementation of the above embodiments, the first condition includes resetting the first MAC entity.

[0201] As a sub-implementation of the above embodiments, the first condition is that the first MAC entity is reset.

[0202] As a sub-implementation of the above embodiments, the first condition includes: the first MAC entity reset is requested by a higher layer; the first cell group is an MCG.

[0203] As a sub-implementation of the above embodiments, the first condition includes: the first MAC entity reset is requested by a higher layer; the first cell group is an SCG.

[0204] As a sub-implementation of the above embodiments, the first condition includes: the first MAC entity reset is triggered by SCG deactivation; the first cell group is an SCG.

[0205] As a sub-implementation of the above embodiments, the first condition includes: the first MAC entity reset is indicated by MAC sublayer signaling, the first cell is an LTM candidate cell, and the first cell group is an MCG.

[0206] As a sub-implementation of the above embodiments, the first condition includes: the first MAC entity reset is indicated by MAC sublayer signaling, the first cell is an LTM candidate cell, and the first cell group is an SCG.

[0207] As a sub-implementation of the above embodiments, the first condition is: the first MAC entity reset is requested by a higher layer; the first cell group is an MCG.

[0208] As a sub-implementation of the above embodiments, the first condition is: the first MAC entity reset is requested by a higher layer; the first cell group is an SCG.

[0209] As a sub-implementation of the above embodiments, the first condition is: the first MAC entity reset is triggered by the deactivation of the SCG; the first cell group is an SCG.

[0210] As a sub-implementation of the above embodiments, the first condition is: the first MAC entity reset is indicated by MAC sublayer signaling, the first cell is an LTM candidate cell, and the first cell group is an MCG.

[0211] As a sub-implementation of the above embodiments, the first condition is: the first MAC entity reset is indicated by MAC sublayer signaling, the first cell is an LTM candidate cell, and the first cell group is an SCG.

[0212] As a sub-example of the above embodiments, the higher-level request refers to the higher-level request of the RRC sub-layer.

[0213] As a sub-implementation of the above embodiments, the higher-level request refers to the RRC sub-level request.

[0214] As a sub-implementation of the above embodiments, the higher-level request refers to receiving the RRCReconfiguration message.

[0215] As a sub-example of the above embodiments, the higher-level request refers to receiving the RRCReeatablishment message.

[0216] As a sub-example of the above embodiments, the higher-level request refers to receiving the RRCsetup message.

[0217] As a sub-example of the above embodiments, the higher-level request refers to receiving the RRCReject message.

[0218] As a sub-implementation of the above embodiments, the higher-level request refers to receiving the RRCRelease message.

[0219] As a sub-example of the above embodiments, the higher-level request refers to receiving the reconfigurationWithSync IE in RRCReconfiguration.

[0220] As a sub-example of the above embodiments, the higher-level request refers to the received RRCReconfiguration's reconfigurationWithSync IE instructing the first node to perform a MAC reset.

[0221] As a sub-example of the above embodiments, the higher-layer request refers to a cell reselection that occurs while waiting for lower-layer confirmation in the SI request procedure.

[0222] As a sub-example of the above embodiment, the higher-level request refers to the expiration of timer T300.

[0223] As a sub-example of the above embodiments, the higher-layer request refers to the upper layer instructing the termination of RRC connection establishment, and at this time the UE has not entered the connected state.

[0224] As a sub-example of the above embodiment, the higher-level request refers to the expiration of timer T304, and the first cell is Target PCell.

[0225] As a sub-example of the above embodiments, the higher-level request refers to the failure of CHO candidate cell fast recovery.

[0226] As a sub-example of the above embodiments, the higher-level request refers to the failure of LTM candidate cell fast recovery.

[0227] As a sub-implementation of the above embodiments, the higher-layer request refers to the occurrence of consecutive LBT contention failures during DAPS handover, where the first cell group is the source MCG.

[0228] As a sub-example of the above embodiments, the higher-level request refers to entering the IDLE state.

[0229] As a sub-example of the above embodiments, the higher-level request refers to performing LTM cell handover.

[0230] As a sub-implementation of the above embodiments, the MAC sublayer signaling is a MAC CE.

[0231] As a sub-implementation of the above embodiments, the MAC sublayer signaling is an LTM Cell SwitchCommand.

[0232] As a sub-implementation of the above embodiment, the first condition is satisfied when the first MAC entity is reset.

[0233] As a sub-implementation of the above embodiments, the first condition is satisfied when at least the first MAC entity is reset.

[0234] As a sub-implementation of the above embodiment, the first MAC entity is reset and the first condition is satisfied.

[0235] As a sub-implementation of the above embodiments, the first condition is satisfied in response to the first MAC entity being reset.

[0236] As a sub-implementation of the above embodiments, when resetting the first MAC entity, the first counter is set to an initial value.

[0237] As a sub-implementation of the above embodiment, the first condition is satisfied; in response to the first condition being satisfied, the first counter is set to an initial value.

[0238] As a sub-implementation of the above embodiment, the first counter is set to an initial value during the process of the first condition being met.

[0239] As a sub-implementation of the above embodiment, when the first condition is met, the first counter is set to an initial value.

[0240] As a sub-implementation of the above embodiments, the first counter is set to an initial value when at least the first condition is met.

[0241] As one embodiment, the second condition includes the first cell group being deactivated.

[0242] As a sub-implementation of the above embodiment, the second condition is that the first cell group is deactivated.

[0243] As a sub-implementation of the above embodiments, the first cell group is an SCG.

[0244] As a sub-implementation of the above embodiments, the deactivation of the first cell group is indicated by an RRC message.

[0245] As a sub-implementation of the above embodiments, the deactivation of the first cell group is indicated by an RRC message.

[0246] As a sub-implementation of the above embodiments, the first cell group is deactivated by the scg-State field.

[0247] As a sub-implementation of the above embodiments, the scg-State field associated with the first cell group is set to deactivated.

[0248] As a sub-implementation of the above embodiments, the deactivation of the first cell group is implicitly indicated by an RRC message.

[0249] As a sub-implementation of the above embodiments, the deactivation of the first cell group is indicated by the absence of the scg-State field in the RRC message.

[0250] As a sub-implementation of the above embodiments, the first cell group is deactivated by signaling from the MAC sublayer.

[0251] As a sub-implementation of the above embodiments, the first cell group is deactivated by MAC CE.

[0252] As a sub-implementation of the above embodiments, the first cell group is deactivated by a first MAC CE, which is associated with LTM.

[0253] As a sub-example of the above embodiments, the phrase "the first MAC CE is related to LTM" means that the first MAC CE is an SCG LTM switch command.

[0254] As a sub-implementation of the above embodiments, the phrase "the first MAC CE is related to LTM" means that the first MAC CE is sent along with the SCG LTM conversion command.

[0255] As a sub-example of the above embodiments, the phrase "the first MAC CE is related to LTM" means that the first MAC CE can only be received if the SCG LTM conversion command is received.

[0256] As an example, the first cell group is deactivated by signaling from the MAC sublayer.

[0257] As an example, the deactivation of the first cell group is indicated by a PDCCH order.

[0258] As an example, the deactivation of the first cell group is indicated by a DCI.

[0259] As a sub-implementation of the above embodiments, upon receiving the DCI, the first cell group is deactivated.

[0260] As a sub-implementation of the above embodiment, the received DCI indicates that the first cell group has been deactivated.

[0261] As a sub-implementation of the above embodiment, the second condition is satisfied when the first cell group is deactivated.

[0262] As a sub-implementation of the above embodiments, the second condition is satisfied when at least the first cell group is deactivated.

[0263] As a sub-implementation of the above embodiment, when the instruction to deactivate the first cell group is received, the second condition is satisfied.

[0264] As a sub-implementation of the above embodiment, when the instruction to deactivate the first cell group is received and passed to the MAC sublayer, the second condition is satisfied.

[0265] As a sub-implementation of the above embodiment, the second condition is satisfied when the instruction to deactivate the first cell group is received and passed to a sublayer above the MAC sublayer.

[0266] As a sub-implementation of the above embodiments, the second condition is satisfied as a response to the deactivation of the first cell group.

[0267] As a sub-implementation of the above embodiment, the second condition is satisfied; in response to the second condition being satisfied, the first counter is set to an initial value.

[0268] As a sub-implementation of the above embodiment, the first counter is set to an initial value during the process of the second condition being met.

[0269] As a sub-implementation of the above embodiment, when the second condition is met, the first counter is set to an initial value.

[0270] As a sub-implementation of the above embodiment, when at least the second condition is met, the first counter is set to an initial value.

[0271] As an example, the third condition includes the successful completion of the second random access procedure, which is a random access procedure initiated by the first MAC entity prior to the first random access procedure.

[0272] As a sub-implementation of the above embodiments, the third condition is that the second random access procedure is successfully completed, and the second random access procedure is a random access procedure initiated by the first MAC entity before the first random access procedure.

[0273] As a sub-implementation of the above embodiments, the second random access procedure is not triggered by the PDCCH order for LTM candidate cells.

[0274] As a sub-implementation of the above embodiments, the PDCCH order of the LTM candidate cell indicates the index of the LTM candidate cell.

[0275] As a sub-implementation of the above embodiments, a preamble is specified for the PDCCH order of LTM candidate cells.

[0276] As a sub-implementation of the above embodiments, the second random access procedure is not initiated to obtain the TA of the LTM candidate cell.

[0277] As a sub-implementation of the above embodiments, the second random access procedure is initiated for BFR.

[0278] As a sub-implementation of the above embodiments, the second random access procedure is initiated for uplink synchronization.

[0279] As a sub-implementation of the above embodiments, the second random access procedure is initiated for the purpose of an SI request.

[0280] As a sub-implementation of the above embodiments, the second random access procedure is initiated for initial access.

[0281] As a sub-implementation of the above embodiments, the second random access procedure is initiated for RRC connection reconstruction.

[0282] As a sub-implementation of the above embodiments, the second random access procedure is initiated for handover.

[0283] As a sub-implementation of the above embodiments, the switching is a conventional switching.

[0284] As a sub-implementation of the above embodiments, the switching is DAPS switching.

[0285] As a sub-example of the above embodiments, the switching is a CHO switching.

[0286] As a sub-example of the above embodiments, the switching is an LTM conversion.

[0287] As a sub-implementation of the above embodiments, the handover-initiated random access procedure is triggered by RRC layer signaling.

[0288] As a sub-implementation of the above embodiments, the handover-initiated random access procedure is triggered by MAC layer signaling.

[0289] As a sub-example of the above embodiments, the handover-initiated random access procedure is triggered by the UE.

[0290] As a sub-implementation of the above embodiments, the second random access procedure is the first random access procedure initiated by the first MAC entity.

[0291] As a sub-implementation of the above embodiments, the second random access procedure is the previous random access procedure initiated by the first MAC entity before the first random access procedure.

[0292] As a sub-implementation of the above embodiments, the successful completion of the second random access procedure includes: detecting a DCI containing specific RA-RNTI scrambling.

[0293] As a sub-implementation of the above embodiments, the successful completion of the second random access procedure includes: detecting a DCI containing specific C-RNTI scrambling.

[0294] As a sub-implementation of the above embodiments, the successful completion of the second random access procedure includes: receiving a RAR data block.

[0295] As a sub-implementation of the above embodiments, the successful completion of the second random access procedure includes: detecting a DCI containing specific TC-RNTI scrambling.

[0296] As a sub-implementation of the above embodiments, the successful completion of the second random access procedure includes sending HARQ-ACK feedback.

[0297] As a sub-implementation of the above embodiments, the successful completion of the second random access procedure includes: sending the first available uplink data.

[0298] As a sub-implementation of the above embodiments, the successful completion of the second random access procedure includes: receiving the first available downlink data.

[0299] As a sub-implementation of the above embodiments, the successful completion of the second random access procedure includes: discarding the random access resources used in the second random procedure.

[0300] As a sub-implementation of the above embodiment, when the last Preamble in the second random access process is sent, the value of the first counter is greater than 1. As a sub-implementation of the above embodiment, when the last Preamble in the second random access process is sent, the value of the first counter is greater than the initial value.

[0301] As a sub-implementation of the above embodiments, "greater than" means "not less than".

[0302] As a sub-implementation of the above embodiment, when the last Preamble in the second random access process is sent, the value of the first counter is not set.

[0303] As a sub-implementation of the above embodiment, during the initialization process of the second random access procedure, the first counter is set to the initial value.

[0304] As a sub-implementation of the above embodiment, during the initialization process of the second random access procedure, if the first counter is not the initial value, the first counter is set to the initial value.

[0305] As a sub-implementation of the above embodiment, it is assumed that the third condition is satisfied after the second random access procedure is successfully completed.

[0306] As a sub-implementation of the above embodiment, when an instruction is received that the second random access procedure has been successfully completed, the third condition is satisfied.

[0307] As a sub-implementation of the above embodiment, the third condition is satisfied when the second random access procedure is successfully completed.

[0308] As a sub-implementation of the above embodiment, the third condition is satisfied when at least the second random access procedure is successfully completed.

[0309] As a sub-implementation of the above embodiments, the third condition is satisfied as a response to the successful completion of the second random access procedure.

[0310] As a sub-implementation of the above embodiment, the third condition is satisfied; in response to the third condition being satisfied, the first counter is set to an initial value.

[0311] As a sub-implementation of the above embodiment, the first counter is set to an initial value during the process of the third condition being met.

[0312] As a sub-implementation of the above embodiment, when the third condition is met, the first counter is set to an initial value.

[0313] As a sub-implementation of the above embodiment, when at least the third condition is met, the first counter is set to an initial value.

[0314] As an example, the fourth condition depends on receiving the target DCI on a second cell, which is not the first cell.

[0315] As a sub-implementation of the above embodiments, the fourth condition includes receiving the target DCI on a second cell, wherein the second cell is not the first cell.

[0316] As a sub-implementation of the above embodiments, the fourth condition refers to receiving the target DCI on a second cell, where the second cell is not the first cell.

[0317] As a sub-implementation of the above embodiment, the second cell is the cell that was passed before the first cell.

[0318] As a sub-example of the above embodiments, the "passed-through cell" refers to the cell where the user stayed.

[0319] As a sub-example of the above embodiments, the cell that has been passed through refers to the cell that has been connected.

[0320] As a sub-implementation of the above embodiments, the cell that has been passed through refers to a cell where an RLF has occurred.

[0321] As a sub-example of the above embodiment, the cell that has been passed through refers to a cell that has experienced a BFR.

[0322] As a sub-example of the above embodiments, the cell that has been visited refers to the cell that has performed information reporting.

[0323] As a sub-implementation of the above embodiments, the cell that has been visited refers to the cell that initiated the random access.

[0324] As a sub-example of the above embodiment, the second cell is the cell that performed random access before the first cell.

[0325] As a sub-implementation of the above embodiments, the second cell is an LTM candidate cell.

[0326] As a sub-implementation of the above embodiments, the random access procedure initiated on the second cell is triggered by the PDCCH Order.

[0327] As a sub-implementation of the above embodiments, the second cell is a neighboring cell of the first cell.

[0328] As a sub-implementation of the above embodiments, the second cell is not a neighboring cell of the first cell.

[0329] As a sub-implementation of the above embodiments, the second cell is a source cell and the first cell is a target cell.

[0330] As a sub-implementation of the above embodiments, the second cell is a source cell and the first cell is a candidate cell.

[0331] As a sub-implementation of the above embodiments, the second cell is a PCell cell and the first cell is a PSCell cell.

[0332] As a sub-implementation of the above embodiments, the second cell is a candidate cell, and the first cell is a candidate cell.

[0333] As a sub-implementation of the above embodiment, the fourth condition is a successful handover; the target DCI received on the second cell is used to indicate that the random access procedure is complete.

[0334] As a sub-implementation of the above embodiment, the fourth condition is a successful handover; the target DCI received on the second cell is used to determine that the handover was successful.

[0335] As a sub-implementation of the above embodiment, the fourth condition is a successful handover; the target DCI received on the second cell is used to indicate a successful handover.

[0336] As a sub-implementation of the above embodiment, the fourth condition is a successful handover; the target DCI received on the second cell is used to schedule subsequent data transmission.

[0337] As a sub-example of the above embodiment, the fourth condition is that the target DCI is received on the second cell after the random access procedure triggered by the PDCCH Order is completed in the second cell.

[0338] As a sub-implementation of the above embodiment, the fourth condition is receiving an indication from a higher layer in the MAC sublayer; as a response to a successful handover, the higher layer of the first node sends the indication to the lower layer; the higher layer includes the RRC sublayer; the lower layer includes the MAC sublayer.

[0339] As a sub-implementation of the above embodiment, the fourth condition is that the MAC sublayer of the first node receives an indication from a lower layer of the first node; in response to receiving the target DCI on the second cell, the lower layer of the first node sends the indication to a higher layer of the first node; the higher layer includes the MAC sublayer; the lower layer includes the physical layer.

[0340] As a sub-implementation of the above embodiment, the CRC of the target DCI received in the second cell is scrambled by the C-RNTI of the first node in the second cell, and the target DCI indicates new data transmission.

[0341] As a sub-example of the above embodiment, in response to receiving the target DCI on the second cell, it is determined that the handover was successful.

[0342] As a sub-example of the above embodiment, when the target DCI is received on the second cell, it is determined that the handover was successful.

[0343] As a sub-example of the above embodiments, the successful switching means that the LTM conversion is successfully completed.

[0344] As a sub-example of the above embodiments, the successful switching means that the CHO switching is successfully completed.

[0345] As a sub-example of the above embodiment, the fourth condition is satisfied when the target DCI is received on the second cell.

[0346] As a sub-implementation of the above embodiment, the fourth condition is satisfied when the target DCI is received at least on the second cell.

[0347] As a sub-implementation of the above embodiment, the fourth condition is satisfied when the target DCI is received on the second cell and reported to a higher layer.

[0348] As a sub-implementation of the above embodiments, reporting to a higher layer means: decoding the content of the target DCI and reporting it to the MAC layer.

[0349] As a sub-implementation of the above embodiments, reporting to a higher layer means: decoding the content of the target DCI and reporting it to the RRC layer.

[0350] As a sub-implementation of the above embodiment, the fourth condition is satisfied when the target DCI is received on the second cell and the first uplink data is sent.

[0351] As a sub-implementation of the above embodiment, the fourth condition is satisfied; in response to the fourth condition being satisfied, the first counter is set to an initial value.

[0352] As a sub-implementation of the above embodiment, the first counter is set to an initial value during the process of the fourth condition being met.

[0353] As a sub-implementation of the above embodiment, when the fourth condition is met, the first counter is set to an initial value.

[0354] As a sub-implementation of the above embodiment, when at least the fourth condition is met, the first counter is set to an initial value.

[0355] As an example, the first counter is set to the initial value whenever any condition in the first set of conditions is met.

[0356] As an example, once any condition in the first set of conditions is met, the first counter is set to the initial value.

[0357] As an example, when any condition in the first set of conditions is met, the first counter is set to the initial value, regardless of whether there is an ongoing random access procedure.

[0358] As an example, when any condition in the first set of conditions is met, the first counter is set to the initial value regardless of whether the first random access procedure is in progress.

[0359] As an example, during the initialization of the first random access procedure, the first counter is set to the initial value in response to the satisfaction of any condition in the first set of conditions.

[0360] As an example, during the initialization of the first random access procedure, if any condition in the first set of conditions is met, the first counter is set to the initial value.

[0361] Example 2

[0362] 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. Node 203 provides user and control plane protocol termination to UE 201. Node 203 can 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, laptop computers, 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, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handheld device, user agent, mobile client, client, or any other suitable term.Node 203 connects 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 / SMFs 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 handling signaling between UE201 and 5GC / EPC210. ​​Generally, MME / AMF / SMF 211 provides bearer and connection management. All user IP (Internet Protocol) packets are transmitted through S-GW / UPF 212, which is itself connected to P-GW / UPF 213. The P-GW provides UE IP address allocation and other functions. The P-GW / UPF213 connects to Internet service 230. Internet service 230 includes carrier-compliant Internet protocol services, specifically including the Internet, intranet, IMS (IP Multimedia Subsystem), and packet-switched streaming services.

[0363] As an example, the UE201 corresponds to the first node in this application.

[0364] As an example, the UE201 is a user equipment (UE).

[0365] As an example, the UE201 is a base station (BS).

[0366] As an example, the UE201 is a relay device.

[0367] As an example, the UE201 is a gateway device.

[0368] As an example, node 203 corresponds to the second node in this application.

[0369] As one example, node 203 is a base station device.

[0370] As an example, node 203 is a user equipment.

[0371] As one example, node 203 is a relay device.

[0372] As one example, node 203 is a gateway device.

[0373] Typically, UE201 is a user equipment and node203 is a base station device.

[0374] Typically, UE201 is a user equipment, and node203 is a user equipment.

[0375] Typically, UE201 is a base station device, and node203 is a base station device.

[0376] As an example, node 204 corresponds to the third node in this application.

[0377] As an example, node 204 is a base station device.

[0378] As an example, node 204 is a user equipment.

[0379] As an example, node 204 is a relay device.

[0380] As one example, node 204 is a gateway device.

[0381] As an example, the UE201 maintains a connection with both the node 203 and the node 204.

[0382] As an example, node 203 and node 204 are connected via an ideal backhaul connection.

[0383] As an example, node 203 and node 204 are connected via a non-ideal backhaul connection.

[0384] As an example, node 203 and node 204 simultaneously provide radio resources to UE 201.

[0385] As an example, node 203 and node 204 do not simultaneously provide radio resources to UE 201.

[0386] In one embodiment, node 203 and node 204 are the same node.

[0387] As an example, node 203 and node 204 are two different nodes.

[0388] As an example, node 203 and node 204 are of the same type.

[0389] As an example, the node 203 and the node 204 are of different types.

[0390] Typically, UE201 is a user equipment, node203 is a base station device, and node204 is a base station device.

[0391] Typically, UE201 is a user equipment, node203 is a user equipment, and node204 is a user equipment.

[0392] Typically, UE201 is a base station device, node 203 is a base station device, and node 204 is a base station device.

[0393] As one example, the user equipment supports transmission over a non-terrestrial network (NTN).

[0394] As an example, the user equipment supports terrestrial network transmission.

[0395] As an example, the user equipment supports dual connection (DC) transmission.

[0396] As one example, the user equipment includes an aircraft.

[0397] As one embodiment, the user equipment includes an in-vehicle terminal.

[0398] As one example, the user equipment includes a vessel.

[0399] As one example, the user equipment includes an Internet of Things (IoT) terminal.

[0400] As one example, the user equipment includes a terminal for the Industrial Internet of Things (IIoT).

[0401] As one embodiment, the user equipment includes devices that support low-latency, high-reliability transmission.

[0402] As one embodiment, the user equipment includes testing equipment.

[0403] As one embodiment, the user equipment includes a signaling tester.

[0404] As one embodiment, the user equipment includes IAB (Integrated Access and Backhaul)-MT.

[0405] As an example, the user equipment supports generating reports using AI (Artificial Intelligence) or machine learning.

[0406] As an example, the user equipment supports dynamically configuring a first set of conditions using AI (Artificial Intelligence) or machine learning.

[0407] As an example, the user equipment supports dynamic switching between AI (Artificial Intelligence) and machine learning.

[0408] As an example, the user equipment supports generating a trained model using training data or generating some parameters of the trained model using training data.

[0409] As an example, the user equipment supports the application of the first RRC message through training.

[0410] As an example, the user equipment supports determining at least a portion of the information in the first RRC message through training.

[0411] As an example, the user equipment is a terminal that supports Massive-MIMO.

[0412] As an example, the base station equipment supports transmission over non-terrestrial networks.

[0413] As one example, the base station equipment supports transmission over a terrestrial network.

[0414] As one embodiment, the base station equipment includes a Base Transceiver Station (BTS).

[0415] As one embodiment, the base station equipment includes a NodeB (NB).

[0416] As one embodiment, the base station equipment includes a gNB.

[0417] As one example, the base station equipment includes an eNB.

[0418] As one example, the base station equipment includes an ng-eNB.

[0419] As one embodiment, the base station equipment includes an en-gNB.

[0420] As one embodiment, the base station equipment includes a CU (Centralized Unit).

[0421] As one embodiment, the base station equipment includes a DU (Distributed Unit).

[0422] As one embodiment, the base station equipment includes a TRP (Transmitter Receiver Point).

[0423] As one example, the base station equipment includes a macrocell base station.

[0424] As one embodiment, the base station equipment includes a microcell base station.

[0425] As one example, the base station equipment includes a pico cell base station.

[0426] As one example, the base station equipment includes a femtocell.

[0427] As one embodiment, the base station equipment includes flight platform equipment.

[0428] As one example, the base station equipment includes satellite equipment.

[0429] As one embodiment, the base station equipment includes testing equipment.

[0430] As one embodiment, the base station equipment includes a signaling tester.

[0431] As one embodiment, the base station equipment includes a gateway device.

[0432] As one embodiment, the base station equipment includes an IAB-node.

[0433] As one example, the base station equipment includes an IAB-donor.

[0434] As one embodiment, the base station equipment includes IAB-donor-CU.

[0435] As one embodiment, the base station equipment includes IAB-donor-DU.

[0436] As one embodiment, the base station equipment includes an IAB-DU.

[0437] As one example, the base station equipment includes IAB-MT.

[0438] As one example, the base station equipment supports Massive-MIMO-based transmission.

[0439] As an example, the base station equipment supports decompressing CSI using AI or deep learning.

[0440] As one example, the base station equipment supports mobility management using AI or deep learning.

[0441] Example 3

[0442] 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 data 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 (Hybrid Automatic Repeat Request). MAC sublayer 302 provides multiplexing between the 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). The radio protocol architecture in the user plane 350 is substantially the same as the corresponding layers and sublayers in the control plane 300 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. 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.

[0443] As an example, Appendix Figure 3 The wireless protocol architecture described herein is applicable to the first node in this application.

[0444] As an example, Appendix Figure 3The wireless protocol architecture described herein is applicable to the second node in this application.

[0445] As an example, Appendix Figure 3 The wireless protocol architecture described herein is applicable to the third node described in this application.

[0446] As an example, the first Preamble in this application is generated in the PHY301 or PHY351.

[0447] As an example, the second Preamble in this application is generated in the PHY301 or PHY351.

[0448] As an example, the first RRC message in this application is generated in RRC306.

[0449] As an example, the first MAC entity in this application is generated from MAC302 or MAC352.

[0450] As an example, the first DCI in this application is generated in the PHY301 or PHY351.

[0451] As an example, the second DCI in this application is generated in the PHY301 or PHY351.

[0452] As an example, the first UE variable in this application is set in the RRC306.

[0453] Example 4

[0454] 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 an access network.

[0455] 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.

[0456] 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.

[0457] 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.

[0458] 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.

[0459] 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.

[0460] 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.

[0461] As an embodiment, the first communication device 450 corresponds to the first node in this application; 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: sets a first counter to an initial value in response to any condition in a first set of conditions being met; a first MAC entity performs a first random access procedure on a first cell, the execution of the first random access procedure including calculating the target received power of a first preamble according to the first counter, instructing the physical layer to send the first preamble, the first MAC entity being the MAC entity corresponding to a first cell group; wherein, the first set of conditions includes at least one of a first condition, a second condition, a third condition, or a fourth condition; the first condition depends on the first MAC entity being reset; the second condition includes the first cell group being deactivated; the third condition includes the successful completion of a second random access procedure, the second random access procedure being a random access procedure initiated by the first MAC entity before the first random access procedure; the fourth condition depends on receiving a target DCI on a second cell, the second cell being not the first cell.

[0462] As an embodiment, the first communication device 450 corresponds to the first node in this application; the first communication device 450 includes: a memory storing a computer-readable instruction program, which generates an action when executed by at least one processor, the action including: setting a first counter to an initial value as a response to any condition in a first set of conditions being met; a first MAC entity performing a first random access procedure on a first cell, the execution of the first random access procedure including calculating a target received power of a first preamble based on the first counter, instructing the physical layer to send the first preamble, the first MAC entity being a MAC entity corresponding to a first cell group; wherein, the first set of conditions includes at least one of a first condition, a second condition, a third condition, or a fourth condition; the first condition depends on the first MAC entity being reset; the second condition includes the first cell group being deactivated; the third condition includes the successful completion of a second random access procedure, the second random access procedure being a random access procedure initiated by the first MAC entity before the first random access procedure; the fourth condition depends on receiving a target DCI on a second cell, the second cell being not the first cell.

[0463] As an embodiment, the second communication device 410 corresponds to the second node in this application; 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: receives a first preamble during a first random access procedure; wherein, in response to any condition in a first set of conditions being met, the sender of the first preamble sets the first counter to an initial value; a first MAC entity executes the first random access procedure on a first cell, the execution of the first random access procedure including calculating the target received power of the first preamble according to the first counter, the first MAC entity being the MAC entity corresponding to a first cell group; the first set of conditions includes at least one of a first condition, a second condition, a third condition, or a fourth condition; the first condition depends on the first MAC entity being reset; the second condition includes the first cell group being deactivated; the third condition includes the successful completion of a second random access procedure, the second random access procedure being a random access procedure initiated by the first MAC entity before the first random access procedure; the fourth condition depends on the sender of the first preamble receiving the target DCI on a second cell, the second cell not being the first cell.

[0464] As an embodiment, the second communication device 410 corresponds to the second node in this application; the second communication device 410 includes: a memory storing a computer-readable instruction program that generates an action when executed by at least one processor, the action including: receiving a first preamble during a first random access procedure; wherein, as a response to any condition in a first set of conditions being met, the sender of the first preamble sets a first counter to an initial value; a first MAC entity executing the first random access procedure on a first cell, the execution of the first random access procedure including calculating a target received power of the first preamble according to the first counter, the first MAC entity being a MAC entity corresponding to a first cell group; the first set of conditions including at least one of a first condition, a second condition, a third condition, or a fourth condition; the first condition depending on the first MAC entity being reset; the second condition including the first cell group being deactivated; the third condition including the successful completion of a second random access procedure, the second random access procedure being a random access procedure initiated by the first MAC entity before the first random access procedure; the fourth condition depending on the sender of the first preamble receiving a target DCI on a second cell, the second cell not being the first cell.

[0465] As an example, the second communication device 410 corresponds to the third node in this application; 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: sends a first RRC message, the first RRC message indicating configuration information of the first cell; the configuration information of the first cell includes random access information of the first cell; wherein, as a response to any condition in the first set of conditions being met, the receiver of the first RRC message sets a first counter to an initial value; a first MAC entity performs a first random access procedure on the first cell, the execution of the first random access procedure including calculating the target received power of a first preamble according to the first counter, instructing the physical layer to send the first preamble, the first MAC entity being the MAC entity corresponding to the first cell group; the first set of conditions includes at least one of a first condition, a second condition, a third condition, or a fourth condition; the first condition depends on the first MAC entity being reset; the second condition includes the first cell group being deactivated; the third condition includes the successful completion of a second random access procedure, the second random access procedure being a random access procedure initiated by the first MAC entity before the first random access procedure; the fourth condition depends on receiving a target DCI on a second cell, the second cell being not the first cell.

[0466] As an embodiment, the second communication device 410 corresponds to the third node in this application; the second communication device 410 includes: a memory storing a computer-readable instruction program, the computer-readable instruction program generating actions when executed by at least one processor, the actions including: sending a first RRC message, the first RRC message indicating configuration information of the first cell; the configuration information of the first cell including random access information of the first cell; wherein, as a response to any condition in a first set of conditions being satisfied, the receiver of the first RRC message sets a first counter to an initial value; a first MAC entity performs a first random access procedure on the first cell, the execution of the first random access procedure including according to the first... A counter calculates the target received power of the first preamble, instructing the physical layer to send the first preamble. The first MAC entity is the MAC entity corresponding to the first cell group. The first condition set includes at least one of a first condition, a second condition, a third condition, or a fourth condition. The first condition depends on the first MAC entity being reset. The second condition includes the first cell group being deactivated. The third condition includes the successful completion of a second random access procedure, which is a random access procedure initiated by the first MAC entity before the first random access procedure. The fourth condition depends on receiving the target DCI on a second cell, which is not the first cell.

[0467] As an example, at least one of the antenna 420, the transmitter 418, the transmitter processor 416, and the controller / processor 475 is used to transmit the first RRC message.

[0468] As one embodiment, at least one of the antenna 452, the receiver 454, the receiving processor 456, and the controller / processor 459 is used to receive the first RRC message.

[0469] As an example, at least one of the antenna 420, the transmitter 418, the transmission processor 416, and the controller / processor 475 is used to transmit the first DCI.

[0470] As one embodiment, at least one of the antenna 452, the receiver 454, the receiving processor 456, and the controller / processor 459 is used to receive the first DCI.

[0471] As an example, at least one of the antenna 420, the transmitter 418, the transmission processor 416, and the controller / processor 475 is used to transmit the second DCI.

[0472] As one embodiment, at least one of the antenna 452, the receiver 454, the receiving processor 456, and the controller / processor 459 is used to receive the second DCI.

[0473] As one embodiment, at least one of the antenna 452, the transmitter 454, the transmission processor 468, and the controller / processor 459 is used to transmit the first preamble.

[0474] As one embodiment, at least one of the antenna 420, the receiver 418, the receiving processor 470, and the controller / processor 475 is used to receive the first preamble.

[0475] As one embodiment, at least one of the antenna 452, the transmitter 454, the transmission processor 468, and the controller / processor 459 is used to transmit the second preamble.

[0476] As one embodiment, at least one of the antenna 420, the receiver 418, the receiving processor 470, and the controller / processor 475 is used to receive the second preamble.

[0477] As an example, the first communication device 450 corresponds to the first node in this application.

[0478] As an example, the first communication device 450 is a user equipment.

[0479] As an example, the first communication device 450 is a base station device.

[0480] As an example, the first communication device 450 is a relay device.

[0481] As one embodiment, the second communication device 410 is a user equipment.

[0482] As one embodiment, the second communication device 410 is a base station device.

[0483] As one embodiment, the second communication device 410 is a relay device.

[0484] Example 5

[0485] 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.

[0486] for First node U01 In step S5101, a first RRC message is received, which indicates the configuration information of the first cell; in step S5102, a second DCI is received, which indicates the initial transmission or retransmission of the Preamble; in step S5103, the second Preamble is sent, which is indicated by the second DCI; in step S5104, as a response to any condition in the first condition set being met, the first counter is set to an initial value; in step S5105, a first DCI is received, which indicates the retransmission of the Preamble and triggers a first random access procedure; in step S5106, the first Preamble is sent.

[0487] for Second node N02 In step S5201, the second Preamble is received; in step S5202, the first Preamble is received.

[0488] for Third node N03 In step S5301, the second DCI is sent; in step S5302, the first DCI is sent.

[0489] for Fourth node N04 In step S5401, the first RRC message is sent.

[0490] In embodiment 5, the first set of conditions includes at least one of a first condition, a second condition, a third condition, or a fourth condition; the first condition depends on the first MAC entity being reset; the second condition includes the first cell group being deactivated; the third condition includes the successful completion of a second random access procedure, which is a random access procedure initiated by the first MAC entity before the first random access procedure; the fourth condition depends on receiving the target DCI on a second cell, which is not the first cell.

[0491] As an example, the first node U01 and the second node N02 are connected by a wire.

[0492] As one example, the first node U01 and the second node N02 are connected via a Uu port.

[0493] As an example, the first node U01 and the second node N02 are connected via an IAB port.

[0494] As an example, the first node U01 and the second node N02 are connected via a PC5 interface.

[0495] As one embodiment, the third node N03 and the second node N02 are connected via a wireless interface.

[0496] As an example, the third node N03 and the second node N02 are connected via a wired interface.

[0497] As an example, the third node N03 and the second node N02 are connected via an Xn interface.

[0498] As one embodiment, the third node N03 and the second node N02 are connected via an X2 interface.

[0499] As an example, the third node N03 and the second node N02 have an ideal backhaul.

[0500] As an example, the backhaul between the third node N03 and the second node N02 is non-ideal.

[0501] As an example, the third node N03 and the second node N02 are each a TRP.

[0502] As an example, the third node N03 and the second node N02 each include at least one TRP.

[0503] As an example, the third node N03 and the second node N02 belong to the same CU.

[0504] As an example, the third node N03 and the second node N02 belong to the same DU.

[0505] As an example, the third node N03 and the second node N02 belong to different CUs.

[0506] As an example, the third node N03 and the second node N02 belong to different DUs.

[0507] As an example, the third node N03 is the second node N02.

[0508] As an example, the third node N03 is not the second node N02.

[0509] As an example, the fourth node N04 is the second node N02.

[0510] As an example, the fourth node N04 is the third node N03.

[0511] As an example, the fourth node N04 is a node other than the second node N02 and the third node N03.

[0512] As an example, the dashed box F5.1 is optional.

[0513] As an example, the dashed box F5.1 is present.

[0514] As a sub-implementation of the above embodiment, the fourth node sends the first RRC message.

[0515] As a sub-implementation of the above embodiment, the third node sends the first RRC message.

[0516] As a sub-implementation of the above embodiments, the first node receives the first RRC message. As a sub-implementation of the above embodiments, the first RRC message is received before the first random access procedure is initiated.

[0517] As a sub-implementation of the above embodiment, the first RRC message is received before the first counter is set to its initial value.

[0518] As a sub-implementation of the above embodiment, the first RRC message is received before any condition in the first condition set is met.

[0519] As a sub-implementation of the above embodiment, after the first RRC message is received, any one of the conditions in the first condition set is evaluated, and as a response to any one of the conditions in the first condition set being satisfied, the first counter is set to an initial value.

[0520] As a sub-implementation of the above embodiment, when the first RRC message is received, any condition in the first condition set is evaluated, and as a response to any condition in the first condition set being satisfied, the first counter is set to an initial value.

[0521] As a sub-implementation of the above embodiments, when at least the first RRC message is received, evaluation of any condition in the first condition set begins, and in response to any condition in the first condition set being satisfied, the first counter is set to an initial value.

[0522] As a sub-implementation of the above embodiment, in response to the receipt of the first RRC message, evaluation of any one of the conditions in the first condition set begins, and in response to the satisfaction of any one of the conditions in the first condition set, the first counter is set to an initial value.

[0523] As a sub-implementation of the above embodiment, the first RRC message configures LTM candidate cells.

[0524] As a sub-implementation of the above embodiment, the first RRC message configures the CHO candidate cell.

[0525] As a sub-implementation of the above embodiments, the first RRC message configures CPC candidate cells.

[0526] As a sub-example of the above embodiment, the first RRC message configures SCPAC candidate cells.

[0527] As a sub-example of the above embodiments, the first RRC message indicates that the configuration information of the first cell includes the physical layer configuration information of the first cell.

[0528] As a sub-example of the above embodiments, the first RRC message indicates that the configuration information of the first cell includes the first node's C(Cell)-RNTI (Radio Network Temporary Identifier) ​​in the first cell.

[0529] As a sub-example of the above embodiments, the first RRC message indicates that the configuration information of the first cell includes the common configuration information of the first cell.

[0530] As a sub-implementation of the above embodiments, the first RRC message indicates that the configuration information of the first cell includes at least some fields in the ServingCellConfigCommon IE.

[0531] As an example, the first RRC message indicates that the configuration information of the first cell includes the downlink common configuration (DownlinkConfigCommon) of the first cell.

[0532] As a sub-example of the above embodiments, the first RRC message indicates that the configuration information of the first cell includes the uplink common configuration (UplinkConfigCommon) of the first cell.

[0533] As a sub-implementation of the above embodiments, the first RRC message indicates that the configuration information of the first cell includes the periodicity of the SSB of the first cell.

[0534] As a sub-example of the above embodiments, the first RRC message indicates that the configuration information of the first cell includes the PBCH (Physical broadcast channel) configuration of the first cell.

[0535] As a sub-example of the above embodiments, the SSB is SS (Synchronization Signals) / PBCH.

[0536] As a sub-implementation of the above embodiments, the SSB is a Synchronization Signals Block.

[0537] As a sub-implementation of the above embodiments, the first RRC message indicates that the configuration information of the first cell includes the time domain positions of the SSB of the first cell.

[0538] As a sub-example of the above embodiments, the first RRC message indicates that the configuration information of the first cell includes the global cell identifier information of the first cell.

[0539] As a sub-example of the above embodiments, the global cell identification information of the first cell includes at least the global cell identity (GCI) of the first cell.

[0540] As a sub-example of the above embodiments, the global cell identification information of the first cell includes the global cell identifier and tracking area code (TCI) of the first cell.

[0541] As a sub-example of the above embodiments, the global cell identification information of the first cell refers to the global cell identifier and tracking area code of the first cell.

[0542] As a sub-example of the above embodiments, the first RRC message indicates that the configuration information of the first cell includes the physical cell identifier information of the first cell.

[0543] As a sub-example of the above embodiments, the physical cell identification information of the first cell includes at least the physical cell identity (PCI) of the first cell.

[0544] As a sub-example of the above embodiments, the physical cell identification information of the first cell includes the physical cell identifier and carrier frequency of the first cell.

[0545] As a sub-example of the above embodiments, the physical cell identification information of the first cell refers to the physical cell identification and carrier frequency of the first cell.

[0546] As a sub-example of the above embodiments, the first RRC message indicates that the configuration information of the first cell includes the identification information of multiple cells, including the first cell.

[0547] As a sub-implementation of the above embodiments, the plurality is greater than one.

[0548] As a sub-example of the above embodiments, the first RRC message indicates that the configuration information of the first cell includes the measurement configuration of the first cell.

[0549] As a sub-example of the above embodiments, the measurement configuration includes an L3 measurement configuration.

[0550] As a sub-example of the above embodiments, the measurement configuration includes the L1 measurement configuration.

[0551] As a sub-implementation of the above embodiments, the measurement information includes measurement reporting configuration.

[0552] As a sub-implementation of the above embodiments, the measurement information includes measurement reporting trigger conditions.

[0553] As a sub-implementation of the above embodiments, in response to the receipt of the first RRC message, the configuration information of the first cell is stored in the first UE variable, and the configuration information of the first cell includes the random access information of the first cell.

[0554] As a sub-implementation of the above embodiments, in response to the receipt of the first RRC message, the configuration information of the first cell is stored in the first UE variable, and in response to the fulfillment of the configuration information, a first measurement report is sent.

[0555] As a sub-implementation of the above embodiments, the first measurement report includes an L1 measurement report.

[0556] As a sub-example of the above embodiments, the first measurement report includes RSRP.

[0557] As a sub-example of the above embodiments, the first measurement report includes RSRQ.

[0558] As a sub-example of the above embodiments, the first measurement report includes SINR.

[0559] As a sub-implementation of the above embodiments, the first measurement report is an L1 measurement report.

[0560] As a sub-example of the above embodiments, the first measurement report is not an L1 measurement report.

[0561] As a sub-implementation of the above embodiments, the first measurement report is an L3 measurement report.

[0562] As a sub-implementation of the above embodiments, in response to the receipt of the first RRC message, the configuration information of the first cell is stored in the first UE variable, and in response to the satisfaction of the configuration information, a random access procedure is initiated.

[0563] As a sub-implementation of the above embodiments, the first UE variable stores the configuration of LTM candidate cells.

[0564] As a sub-example of the above embodiment, the first UE variable stores all configurations of LTM candidate cells.

[0565] As a sub-implementation of the above embodiments, the first UE variable stores the reference configuration of LTM candidate cells.

[0566] As a sub-implementation of the above embodiments, the first UE variable stores the delta configuration of LTM candidate cells.

[0567] As a sub-implementation of the above embodiments, the first UE variable includes VarLTM-Config.

[0568] As a sub-implementation of the above embodiments, the first UE variable includes VarLTM-UE-Config.

[0569] As a sub-implementation of the above embodiment, the first UE variable is VarLTM-Config.

[0570] As a sub-implementation of the above embodiment, the first UE variable is VarLTM-UE-Config.

[0571] As a sub-implementation of the above embodiments, the fourth condition depends on receiving the target DCI on the second cell, which is not the first cell; the first RRC message indicates the configuration information of the second cell; and as a response to the receipt of the first RRC message, the configuration information of the second cell is stored in the first UE variable.

[0572] As a sub-example of the above embodiments, the configuration information of the second cell includes the random access information of the second cell.

[0573] As a sub-example of the above embodiments, the configuration information of the second cell does not include the random access information of the second cell.

[0574] As a sub-implementation of the above embodiments, the random access information belongs to rach-ConfigDedicatedList-r18.

[0575] As a sub-implementation of the above embodiment, the random access information is rach-ConfigDedicatedList-r18.

[0576] As a sub-implementation of the above embodiments, the random access information includes rach-ConfigDedicatedList-r18.

[0577] As an example, the dashed box F5.1 does not exist.

[0578] As an example, the dashed box F5.2 is optional.

[0579] As an example, the dashed box F5.2 is present.

[0580] As a sub-example of the above embodiment, step S5103 is performed before step S5106.

[0581] As a sub-implementation of the above embodiment, the first node U01 receives a second DCI, which includes a first bit block, a second bit block, and a third bit block. The first bit block in the second DCI indicates the initial transmission or retransmission of the Preamble, the second bit block in the second DCI indicates the second Preamble, and the third bit block in the second DCI indicates the first cell.

[0582] As a sub-implementation of the above embodiment, the first counter is set to an initial value after the second DCI is received, and the first counter is set to an initial value before the first DCI is received; the second Preamble is the last Preamble sent before the first Preamble.

[0583] As a sub-implementation of the above embodiment, the first bit block in the second DCI indicates the initial transmission of the Preamble.

[0584] As a sub-implementation of the above embodiment, the first bit block in the second DCI is set to 0 to indicate the initial transmission of the Preamble.

[0585] As a sub-implementation of the above embodiment, the first bit block in the second DCI is set to indicate the initial transmission of the Preamble.

[0586] As a sub-implementation of the above embodiment, the first bit block in the second DCI indicates the retransmission of the Preamble.

[0587] As a sub-implementation of the above embodiment, the first bit block in the second DCI is set to 1 to indicate the retransmission of the Preamble.

[0588] As a sub-implementation of the above embodiment, the first bit block in the second DCI is configured to indicate the retransmission of the Preamble.

[0589] As a sub-implementation of the above embodiments, the reception of the second DCI triggers a third random access procedure.

[0590] As a sub-implementation of the above embodiments, the third random access procedure includes: sending the second Preamble.

[0591] As a sub-implementation of the above embodiments, the third random access procedure refers to sending the second Preamble.

[0592] As a sub-implementation of the above embodiment, after receiving the second DCI and before sending the second Preamble, the third random access procedure is initialized.

[0593] As a sub-example of the above embodiment, the second DCI is received on the third cell.

[0594] As a sub-example of the above embodiments, the third cell is the currently serving cell.

[0595] As a sub-example of the above embodiment, the third cell is the second cell, and the target DCI is received before the second Preamble is sent.

[0596] As a sub-example of the above embodiment, the third cell is the second cell, and the target DCI is received after the second Preamble is sent.

[0597] As a sub-implementation of the above embodiments, the third cell is a PCell, and the first cell is an LTM candidate cell.

[0598] As a sub-implementation of the above embodiment, the third cell receives the second DCI, the second DCI indicates the transmission of the second Preamble to the first cell, the second DCI indicates the initial transmission of the Preamble, and the first counter is set to an initial value when the third random access procedure is initialized.

[0599] As a sub-implementation of the above embodiment, the second DCI is received in the third cell, the second DCI indicates that the second Preamble is sent to the first cell, the second DCI indicates the retransmission of the Preamble, and the value of the first counter is not set when the third random access procedure is initialized.

[0600] As a sub-implementation of the above embodiment, when the third cell receives the second DCI, the second DCI indicates that the second Preamble should be sent to the first cell, and the second DCI indicates the retransmission of the Preamble, when the third random access procedure is initialized, the value of the first counter is not the initial value, and the first counter is set to the initial value.

[0601] As a sub-implementation of the above embodiment, when the third cell receives the second DCI, the second DCI indicates that the second Preamble should be sent to the first cell, and the second DCI indicates the retransmission of the Preamble, the value of the first counter is set to increment by 1 when the third random access procedure is initialized.

[0602] As a sub-implementation of the above embodiment, the third cell is a PSCell, and the first cell is an LTM candidate cell.

[0603] As a sub-example of the above embodiment, when a radio link failure occurs on the MN, the third cell belongs to the SN, and the second DCI is received on the third cell. The second DCI indicates that a second Preamble should be sent to the first cell, where the first cell is the PCell, and the second DCI indicates the recovery of the radio link failure.

[0604] As a sub-example of the above embodiment, the third cell is a PCell, the first cell is a CPC candidate cell, and the first cell group is an SCG.

[0605] As a sub-example of the above embodiment, a radio link failure occurs on the PSCell associated with the third cell.

[0606] As a sub-implementation of the above embodiment, the second DCI indicates that the first cell is a PSCell.

[0607] As a sub-implementation of the above embodiment, the second DCI activates the first cell as PSCell.

[0608] As a sub-implementation of the above embodiments, the second DCI indicates that a random access procedure is initiated in the first cell.

[0609] As a sub-implementation of the above embodiments, after the second DCI is received, the first counter is set to an initial value.

[0610] As a sub-implementation of the above embodiments, in response to the receipt of the second DCI, the first counter is set to an initial value.

[0611] As a sub-implementation of the above embodiments, when at least the second DCI is received, the first counter is set to an initial value.

[0612] As a sub-implementation of the above embodiment, after the second DCI is received, if the value of the first counter is not the initial value, the first counter is set to the initial value.

[0613] As a sub-implementation of the above embodiment, after the second DCI is received, before the first DCI is received, the value of the first counter is not the initial value, and the first counter is set to the initial value.

[0614] As a sub-implementation of the above embodiments, after the second DCI is received, the first counter is set to an initial value before the first DCI is received.

[0615] As a sub-implementation of the above embodiments, after the second DCI is received, before receiving the first DCI, if the set of the first conditions is satisfied, the first counter is set to the initial value.

[0616] As a sub-implementation of the above embodiments, after the third random access process is completed, the first counter is set to an initial value.

[0617] As a sub-implementation of the above embodiment, after the third random access procedure is completed, the first counter is not set to its initial value.

[0618] As a sub-implementation of the above embodiments, after the third random access procedure is completed, if the value of the first counter is not the initial value, the first counter is set to the initial value.

[0619] As a sub-implementation of the above embodiments, after the third random access procedure is completed, before receiving the first DCI, the value of the first counter is not the initial value, and the first counter is set to the initial value.

[0620] As a sub-implementation of the above embodiments, after the third random access procedure is completed, the first counter is set to an initial value before receiving the first DCI.

[0621] As a sub-implementation of the above embodiments, after the third random access procedure is completed, before receiving the first DCI, if the set of the first conditions is satisfied, the first counter is set to the initial value.

[0622] As a sub-example of the above embodiments, the random access procedures associated with the second Preamble and the first Preamble use the same MAC entity.

[0623] As a sub-example of the above embodiments, the random access procedures associated with the second Preamble and the first Preamble use different MAC entities.

[0624] As an example, the dashed box F5.2 does not exist.

[0625] As an example, the dashed box F5.3 is optional.

[0626] As an example, the dashed box F5.3 is present.

[0627] As an example, step S5104 occurs before step S5105.

[0628] As an example, step S5104 is performed after step S5105.

[0629] As a sub-implementation of the above embodiments, the first node U01 receives a first DCI on the first serving cell. The first DCI includes a first bit block, a second bit block, and a third bit block. The first bit block in the first DCI indicates the retransmission of the Preamble, the second bit block in the first DCI indicates the first Preamble, and the third bit block in the first DCI indicates the first cell.

[0630] As a sub-implementation of the above embodiments, the first DCI triggers the first random access procedure.

[0631] As a sub-example of the above embodiment, step S5104 is performed before step S5105.

[0632] As a sub-implementation of the above embodiments, the first serving cell is a PCell, and the first cell group is an MCG.

[0633] As a sub-implementation of the above embodiments, the first serving cell was previously an LTM candidate cell.

[0634] As a sub-example of the above embodiments, the initial random access procedure on the first serving cell is triggered by MAC CE.

[0635] As a sub-example of the above embodiments, the initial random access procedure on the first serving cell is triggered by the PDCCH Order.

[0636] As a sub-implementation of the above embodiments, the first cell is an LTM candidate cell of the first serving cell.

[0637] As a sub-implementation of the above embodiments, the first cell and the second cell are respectively LTM candidate cells of the first serving cell.

[0638] As a sub-implementation of the above embodiments, the first cell and the second cell have the same reference configuration.

[0639] As a sub-implementation of the above embodiments, the first cell and the second cell have different reference configurations.

[0640] As a sub-implementation of the above embodiments, the reference configuration is ltm-ReferenceConfiguration.

[0641] As a sub-implementation of the above embodiments, the reference configuration is not ltm-ReferenceConfiguration.

[0642] As a sub-example of the above embodiments, the first serving cell was previously a CHO candidate cell.

[0643] As a sub-example of the above embodiments, the initial random access procedure on the first serving cell is triggered by an RRC message.

[0644] As a sub-example of the above embodiments, the initial random access procedure on the first serving cell is not triggered by an RRC message.

[0645] As a sub-example of the above embodiments, the initial random access procedure refers to the random access procedure when accessing a cell for the first time.

[0646] As a sub-example of the above embodiments, the first cell is a CHO candidate cell of the first serving cell.

[0647] As a sub-example of the above embodiments, the first cell and the second cell are respectively a CHO candidate cell of the first serving cell.

[0648] As a sub-implementation of the above embodiments, the first cell is a CPC candidate cell of the first serving cell.

[0649] As a sub-implementation of the above embodiments, the first cell and the second cell are each CPC candidate cells of the first serving cell.

[0650] As a sub-implementation of the above embodiments, the first serving cell is a PSCell, and the first cell group is an MCG.

[0651] As a sub-implementation of the above embodiments, the first serving cell is a PSCell, the first cell is the PCell of the first serving cell, and the first cell group is an MCG.

[0652] As a sub-implementation of the above embodiments, the first serving cell is a PSCell, the first cell is the PCell of the first serving cell, the first cell group is an MCG, and the second cell is a PCell.

[0653] As a sub-implementation of the above embodiments, if the wireless link fails to be transmitted on the first cell, during the re-establishment of the connection, the first serving cell receives the first DCI, indicating the retransmission of the random access procedure on the first cell.

[0654] As a sub-implementation of the above embodiments, the first serving cell was previously a CPC candidate cell.

[0655] As a sub-example of the above embodiments, the CPC candidate cells include SCPAC candidate cells that meet the evaluation criteria.

[0656] As a sub-implementation of the above embodiment, the first counter is set to the initial value before the first DCI is received.

[0657] As a sub-implementation of the above embodiment, when the first DCI is received, the first counter is set to the initial value.

[0658] As a sub-implementation of the above embodiment, when at least the first DCI is received, the first counter is set to the initial value.

[0659] As a sub-implementation of the above embodiment, the first DCI is received, instructing the first counter to be set to the initial value.

[0660] As a sub-implementation of the above embodiments, the first DCI is a PDCCH order.

[0661] As a sub-implementation of the above embodiments, the first DCI is a PDCCHorder for an LTM candidate cell.

[0662] As a sub-implementation of the above embodiments, the CRC of the first DCI is scrambled by the C-RNTI of the first serving cell.

[0663] As a sub-implementation of the above embodiment, the first DCI is the first PDCCH order for an LTM candidate cell received after the first counter is set to the initial value.

[0664] As a sub-implementation of the above embodiments, the first DCI is a PDCCH order for LTM candidate cells received after the first counter is set to the initial value. When the first DCI is received, the first counter is at the initial value.

[0665] As a sub-implementation of the above embodiment, the reason why the first DCI is triggered and the first Preamble is indicated to be retransmitted is because the previous Preamble has not been received. When the first DCI is received, the first counter is at its initial value.

[0666] As a sub-example of the above embodiment, the LTM candidate cell does not receive the target Preamble, triggering the first DCI.

[0667] As a sub-example of the above embodiment, if the LTM candidate cell does not receive the target Preamble within a certain period of time, the first DCI is triggered.

[0668] As a sub-example of the above embodiments, if the first serving cell fails to obtain the TA value of the LTM candidate cell within a certain period of time, the first DCI is triggered.

[0669] As a sub-implementation of the above embodiments, the first DCI is for a PDCCH order of BFR.

[0670] As a sub-example of the above embodiments, the BFR is for PCell.

[0671] As a sub-example of the above embodiments, the BFR is for PSCell.

[0672] As a sub-implementation of the above embodiments, the first bit block is set to 1 to indicate the retransmission of the Preamble, and the first bit block is set to 0 to indicate the initial transmission of the Preamble.

[0673] As a sub-implementation of the above embodiment, before receiving the first bit block, an early uplink synchronization configuration, namely EarlyUlSyncConfig, is received.

[0674] As a sub-implementation of the above embodiment, the third bit block indicates the first cell, which is an LTM candidate cell.

[0675] As a sub-implementation of the above embodiment, the third bit block indicates N cells including the first cell, all of which are LTM candidate cells, and the size of the third bit block depends on the number of cells N.

[0676] As a sub-implementation of the above embodiment, the size of the third bit block depends on the number of cells N, which means: the number of bits in the third bit block = log2(N+1).

[0677] As a sub-implementation of the above embodiments, the second bit block indicating the first Preamble means that the second bit block indicates the index of the first Preamble, and the index of the first Preamble is ra-PreambleIndex.

[0678] As a sub-implementation of the above embodiment, the ra-PreambleIndex is not 0b000000.

[0679] As a sub-implementation of the above embodiment, before step S5105, the value of the first counter is an initial value, and the first counter is not set.

[0680] As an example, the dashed box F5.3 does not exist.

[0681] As a sub-implementation of the above embodiments, the transmission of the first Preamble is not indicated by the first DCI.

[0682] Example 6

[0683] Example 6 illustrates a schematic diagram illustrating the conditions under which the first counter according to this application is not set, as shown in the attached diagram. Figure 6 As shown.

[0684] In Example 6, the first counter is not set during the initialization process of the first random access procedure.

[0685] As an example, the first counter is set to an initial value before the initialization process of the first random access procedure, and is not set during the initialization process of the first random access procedure.

[0686] As an example, the conditions in the first condition set are satisfied before the initialization process of the first random access procedure, and the first counter is not set during the initialization process of the first random access procedure.

[0687] As an example, during the initialization process of the first random access procedure, if the condition for setting the first counter is not met, the first counter is not set.

[0688] As an example, the condition for setting the first counter does not belong to the first set of conditions.

[0689] As an example, the conditions for setting the first counter belong to the first set of conditions.

[0690] As an example, the first DCI indicates the retransmission of the Preamble, and the first DCI indicates the transmission of the first Preamble; the cell indicated by the first DCI is the same as the cell indicated by the last PDCCH order for an LTM candidate cell; if at least the cell indicated by the first DCI is the same as the cell that transmitted the last Preamble and the cell that transmitted the last Preamble is indicated by the PDCCH order for an LTM candidate cell, the condition for setting the first counter is not met.

[0691] As an example, if the cell indicated by the first DCI is the same as the cell that sent the last Preamble and the cell that sent the last Preamble is indicated by the PDCCH order of the LTM candidate cell, the condition for setting the first counter is not met.

[0692] As an example, during the first random access process, a first SSB is selected to send a first preamble. If the first SSB is the same as the previously sent SSB, the condition for setting the first counter is not met.

[0693] As an example, during the first random access process, the first DCI indicates the retransmission of the Preamble, and the first DCI indicates that the first Preamble is sent using the first SSB. If the first SSB is the same as the previously sent SSB, the condition for setting the first counter is not met.

[0694] As a sub-example of the above embodiment, setting the first counter means setting the first counter to the initial value.

[0695] As a sub-implementation of the above embodiment, setting the first counter means setting the first counter to 1.

[0696] As an example, during the first random access process, a first SSB is selected to send the first Preamble. If the first SSB is different from the previously sent SSB, the condition for setting the first counter is not met.

[0697] As an example, during the first random access process, the first DCI indicates the retransmission of the Preamble, and the first DCI indicates that the first Preamble is sent using the first SSB. If the first SSB is different from the previously sent SSB, the condition for setting the first counter is not met.

[0698] As a sub-example of the above embodiment, setting the first counter means: setting the first counter to increment the original value by 1.

[0699] As a sub-implementation of the above embodiments, the so-called original value is the initial value.

[0700] As a sub-implementation of the above embodiments, the so-called original value is not the initial value.

[0701] As an example, during the initialization of the first random access procedure, the condition for setting the first counter is not met; as a response to the condition for setting the first counter not being met, the first counter is not set.

[0702] As an example, during the initialization process of the first random access procedure, the action of setting the first counter is not performed.

[0703] As an example, during the time interval between setting the first counter to its initial value and the sending of the first Preamble, the action of setting the first counter is not performed.

[0704] As an example, if the time interval between setting the first counter to its initial value and the sending of the first Preamble does not meet the first time threshold, the action of setting the first counter is not performed.

[0705] As a sub-implementation of the above embodiments, the first time threshold is configured.

[0706] As a sub-implementation of the above embodiments, the first time threshold is predefined.

[0707] As a sub-implementation of the above embodiments, the first time threshold is a default value.

[0708] Example 7

[0709] Example 7 illustrates a schematic diagram of the first counter being greater than the initial value according to this application, as shown in the attached diagram. Figure 7 As shown.

[0710] In Example 7, the first counter is greater than the initial value before the action sets the first counter to the initial value.

[0711] As an example, before setting the first counter to the initial value, it is determined whether the first counter is greater than the initial value.

[0712] As an example, before the initialization process of the first random access procedure and before the first counter is set to the initial value, the first counter is greater than the initial value.

[0713] As an example, during the initialization of the first random access procedure, the first counter is not set; and before the first counter is set to the initial value, the first counter is greater than the initial value.

[0714] As an example, after the first random access procedure is completed, and before the first counter is set to the initial value, the first counter is greater than the initial value.

[0715] As an example, the action of setting the first counter to the initial value can only be performed if the first counter is greater than the initial value.

[0716] As an example, condition evaluation for the first set of conditions can only be performed if the first counter is greater than the initial value.

[0717] As an example, the conditions in the first set of conditions are met, and the first counter is greater than the initial value before the first counter is set to the initial value.

[0718] As a sub-implementation of the above embodiments, the condition in the first condition set being satisfied means that any one of the four conditions in the first condition set is satisfied.

[0719] As a sub-implementation of the above embodiments, the condition in the first condition set being satisfied means that any combination of four conditions in the first condition set is satisfied.

[0720] As an example, "greater than the initial value" means that it is at least 1 greater than the initial value.

[0721] As an example, "greater than" means "not less than".

[0722] As an example, if the first counter is not greater than the initial value, the first counter is not set.

[0723] As an example, if the first counter is not greater than the initial value, the first counter is not set to the initial value.

[0724] As an example, the first counter is not set to the initial value when at least the first counter is not greater than the initial value.

[0725] Example 8

[0726] Example 8 illustrates a schematic diagram of determining the first counter according to the present application, as shown in the attached diagram. Figure 8 As shown.

[0727] In Example 8, the first counter is determined; the determination of the first counter depends on the behavior of setting the first counter to an initial value.

[0728] As an example, setting the first counter to an initial value is used to determine that the first counter is not greater than the initial value + 1.

[0729] As an example, setting the first counter to an initial value is used to determine that the first counter is not greater than the initial value.

[0730] As an example, setting the first counter to an initial value is used to determine that when the determination of the first counter is executed, the value of the first counter is the initial value.

[0731] As an example, setting the first counter to an initial value is used to determine that the first counter is not set during the initialization of the first random access procedure.

[0732] As an example, determining the first counter depends on setting the first counter to an initial value, which means that setting the first counter to an initial value is used to determine the first counter.

[0733] As an example, determining the first counter depends on setting the first counter to an initial value means that the first counter is determined only if the first counter is set to an initial value.

[0734] As an example, determining the first counter depends on setting the first counter to an initial value, which means: determining the first counter when at least the first counter is set to an initial value.

[0735] As an example, the statement that determining the first counter depends on setting the first counter to an initial value means that if the first counter is not set to an initial value, the first counter cannot be determined.

[0736] As an example, the first counter is determined when the time interval between setting the first counter to its initial value and executing the first random access procedure meets a threshold.

[0737] As one embodiment, the first counter is determined if the first condition set is not met between the time the first counter is set to its initial value and the time the first random access procedure is executed.

[0738] As an example, before the first random access procedure, a first counter is set to an initial value, and the first counter is determined during the initialization process of the first random access procedure.

[0739] As an example, the first counter is not set to an initial value before the first random access procedure, and the first counter is determined during the initialization process of the first random access procedure.

[0740] As an example, determining the first counter means: determining whether the first counter is increased by 1 based on the initial value.

[0741] As an example, determining the first counter means determining whether the first counter increments by 1.

[0742] As an example, determining the first counter means determining whether the first counter is set.

[0743] As an example, determining the first counter means: determining whether the first counter needs to be set to an initial value.

[0744] As an example, determining the first counter means determining whether the value of the first counter is valid.

[0745] As an example, determining the first counter means determining the value of the first counter when the first random access procedure is executed.

[0746] Example 9

[0747] Example 9 illustrates a schematic diagram showing that, according to this application, the first counter always remains at the initial value during the initialization process of the first random access procedure, as shown in the attached diagram. Figure 9 As shown.

[0748] In Example 9, the first counter is always at the initial value during the initialization of the first random access procedure; the first counter being always at the initial value during the initialization of the first random access procedure depends on the behavior setting the first counter to the initial value.

[0749] As an example, the first counter is not set during the initialization process of the first random access procedure.

[0750] As an example, when the first random access procedure is initiated, the first counter is the initial value.

[0751] As an example, the first counter remains at the initial value for the time interval between setting the first counter to the initial value and initiating the first random access procedure.

[0752] As an example, the initialization process of the first random access procedure includes: selecting a set of random access resources.

[0753] As an example, the initialization process of the first random access procedure includes configuring the corresponding random access parameters.

[0754] As an example, the initialization process of the first random access procedure includes: initializing the corresponding UE variables.

[0755] As an example, the initialization process of the first random access procedure includes: initializing the first counter.

[0756] As one embodiment, initializing the first counter includes: setting the first counter to always be the initial value.

[0757] As one embodiment, initializing the first counter includes: determining whether the first counter is the initial value.

[0758] As one embodiment, initializing the first counter includes determining that the value of the first counter is an initial value. As one embodiment, the first counter is at the initial value when the first random access procedure is initiated.

[0759] As an example, the first counter is at the initial value before the first random access procedure is initiated.

[0760] As an example, in response to setting the first counter to the initial value, the first counter is always at the initial value during the initialization process of the first random access procedure.

[0761] As an example, when the setting of the first counter to the initial value is satisfied, the first counter is always at the initial value during the initialization process of the first random access procedure.

[0762] As an example, when at least the setting of the first counter to an initial value is satisfied, the first counter is always at the initial value during the initialization process of the first random access procedure.

[0763] As an example, when the setting of the first counter to the initial value is satisfied, the first counter will always be the initial value, regardless of whether the first counter is set to the initial value during the initialization process of the first random access procedure.

[0764] As an example, during the initialization of the first random access procedure, if the first counter is at the initial value, the first counter is not set.

[0765] As an example, the first counter is not set during the initialization process of the first random access procedure.

[0766] As an example, the first counter remains at the initial value for the time interval between setting the first counter to the initial value and initiating the first random access procedure.

[0767] As an example, the time interval is set.

[0768] As an example, the time interval is the default.

[0769] As one example, the time interval depends on setting the first counter to an initial value.

[0770] Example 10

[0771] Example 10 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 10 As shown. In the appendix Figure 10 In the first node, the processing device 1000 includes a first processor 1001.

[0772] The first processor 1001, in response to the satisfaction of any condition in the first condition set, sets the first counter to an initial value; the first MAC entity executes a first random access procedure on the first cell, the execution of the first random access procedure including calculating the target received power of the first preamble according to the first counter, instructing the physical layer to send the first preamble, the first MAC entity being the MAC entity corresponding to the first cell group.

[0773] In Example 10, the first set of conditions includes at least one of a first condition, a second condition, a third condition, or a fourth condition; the first condition depends on the first MAC entity being reset; the second condition includes the first cell group being deactivated; the third condition includes the successful completion of a second random access procedure, which is a random access procedure initiated by the first MAC entity before the first random access procedure; and the fourth condition depends on receiving the target DCI on a second cell, which is not the first cell.

[0774] As one embodiment, a first processor 1001 receives a first RRC message, the first RRC message indicating the configuration information of the first cell; as a response to the receipt of the first RRC message, the configuration information of the first cell is stored in a first UE variable; wherein, the configuration information of the first cell includes the random access information of the first cell.

[0775] As an example, the first processor 1001 receives a first DCI on a first serving cell. The first DCI includes a first bit block, a second bit block, and a third bit block. The first bit block in the first DCI indicates a retransmission of a preamble, the second bit block in the first DCI indicates the first preamble, and the third bit block in the first DCI indicates the first cell. The first DCI triggers the first random access procedure.

[0776] As one embodiment, the first processor 1001 receives a second DCI, the second DCI including a first bit block, a second bit block, and a third bit block, wherein the first bit block in the second DCI indicates the initial transmission or retransmission of a Preamble, the second bit block in the second DCI indicates a second Preamble, and the third bit block in the second DCI indicates the first cell; wherein, the first counter is set to an initial value after the second DCI is received, and the first counter is set to an initial value before the first DCI is received; the second Preamble is the last Preamble sent before the first Preamble.

[0777] As an example, the first counter is not set during the initialization process of the first random access procedure.

[0778] As an example, the first counter is greater than the initial value before the action sets the first counter to the initial value.

[0779] As an example, the first counter is determined; the determination of the first counter depends on the behavior of setting the first counter to an initial value.

[0780] As an example, during the initialization of the first random access procedure, the first counter is always at the initial value; the first counter always being at the initial value during the initialization of the first random access procedure depends on the behavior setting the first counter to the initial value.

[0781] As one embodiment, the first processor 1001 includes a first receiver.

[0782] As one embodiment, the first processor 1001 includes a first transmitter.

[0783] As one embodiment, the first processor 1001 includes a first receiver and a first transmitter.

[0784] As one embodiment, the first receiver includes the appendix to this application. Figure 4 The antenna 452, receiver 454, multi-antenna receiver processor 458, receiver processor 456, controller / processor 459, memory 460, or data source 467 are at least one of these.

[0785] As one embodiment, the first receiver includes the appendix to this application. Figure 4 At least antenna 452 and receiver 454 are included.

[0786] As one embodiment, the first transmitter includes the appendix to this application. Figure 4 The antenna 452 or transmitter 454 or multi-antenna transmitter processor 457 or transmitter processor 468 or controller / processor 459 or memory 460 or data source 467 is at least one of them.

[0787] As one embodiment, the first transmitter includes the appendix to this application. Figure 4 At least antenna 452 and transmitter 454 are included.

[0788] As an example, the first UE variable is set by the first receiver.

[0789] As an example, the first UE variable is set by the first transmitter.

[0790] As an example, the first UE variable is set by the memory 460 in the first receiver.

[0791] As an example, the first UE variable is set by the memory 460 in the first transmitter.

[0792] As an example, the first UE variable is set by the controller / processor 459 in the first receiver.

[0793] As an example, the first UE variable is set by the controller / processor 459 in the first transmitter.

[0794] Example 11

[0795] Example 11 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 11 As shown. In the appendix Figure 11 In the second node, the processing device 1100 includes a second receiver 1101.

[0796] The second receiver 1101 receives the first Preamble during the first random access process;

[0797] In Example 12, as a response to the satisfaction of any condition in the first set of conditions, the sender of the first Preamble sets the first counter to an initial value; the first MAC entity executes the first random access procedure on the first cell, the execution of the first random access procedure including calculating the target received power of the first Preamble according to the first counter, the first MAC entity being the MAC entity corresponding to the first cell group; the first set of conditions includes at least one of a first condition, a second condition, a third condition, or a fourth condition; the first condition depends on the first MAC entity being reset; the second condition includes the first cell group being deactivated; the third condition includes the second random access procedure being successfully completed, the second random access procedure being a random access procedure initiated by the first MAC entity before the first random access procedure; the fourth condition depends on the sender of the first Preamble receiving the target DCI on the second cell, the second cell being not the first cell.

[0798] As an example, the sender of the first Preamble receives a first RRC message, which indicates the configuration information of the first cell; in response to the receipt of the first RRC message, the sender of the first Preamble stores the configuration information of the first cell in a first UE variable.

[0799] As an example, the configuration information of the first cell includes the random access information of the first cell.

[0800] As an example, the sender of the first Preamble receives a first DCI on a first serving cell. The first DCI includes a first bit block, a second bit block, and a third bit block. The first bit block in the first DCI indicates a retransmission of the Preamble, the second bit block in the first DCI indicates the first Preamble, and the third bit block in the first DCI indicates the first cell.

[0801] As an example, the first DCI triggers the first random access procedure.

[0802] As an example, the second receiver 1101 receives a second Preamble; the sender of the first Preamble receives a second DCI, the second DCI including a first bit block, a second bit block and a third bit block, the first bit block in the second DCI indicating the initial transmission or retransmission of the Preamble, the second bit block in the second DCI indicating the second Preamble, and the third bit block in the second DCI indicating the first cell.

[0803] As an example, the first counter is set to an initial value after the sender of the first Preamble receives the second DCI, and the first counter is set to an initial value before the sender of the first Preamble receives the first DCI; the second Preamble is the last Preamble sent before the first Preamble.

[0804] As an example, the first counter is not set during the initialization process of the first random access procedure.

[0805] As an example, the first counter is greater than the initial value before the action sets the first counter to the initial value.

[0806] As an example, the first counter is determined to be set to an initial value based on the behavior.

[0807] As an example, during the initialization of the first random access procedure, the first counter is always at the initial value; the first counter always being at the initial value during the initialization of the first random access procedure depends on the behavior setting the first counter to the initial value.

[0808] As one embodiment, the second receiver 1101 includes the appendix to this application. Figure 4The antenna 420, receiver 418, multi-antenna receiver processor 472, receiver processor 470, controller / processor 475, or memory 476 are at least one of these.

[0809] As one embodiment, the second receiver 1101 includes the appendix to this application. Figure 4 At least antenna 420 and transmitter 418 are included.

[0810] Example 12

[0811] Example 12 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 12 As shown. In the appendix Figure 12 In the process, the processing device 1200 in the third node includes a third transmitter 1201.

[0812] The third transmitter 1201 sends a first RRC message, which indicates the configuration information of the first cell; the configuration information of the first cell includes the random access information of the first cell;

[0813] In Example 12, as a response to the satisfaction of any condition in the first set of conditions, the receiver of the first RRC message sets the first counter to an initial value; the first MAC entity executes a first random access procedure on the first cell, the execution of the first random access procedure including calculating the target received power of the first preamble according to the first counter, instructing the physical layer to send the first preamble, the first MAC entity being the MAC entity corresponding to the first cell group; the first set of conditions includes at least one of a first condition, a second condition, a third condition, or a fourth condition; the first condition depends on the first MAC entity being reset; the second condition includes the first cell group being deactivated; the third condition includes the successful completion of a second random access procedure, the second random access procedure being a random access procedure initiated by the first MAC entity before the first random access procedure; the fourth condition depends on receiving the target DCI on the second cell, the second cell being not the first cell.

[0814] The third transmitter 1201 transmits a first DCI on the first serving cell. The first DCI includes a first bit block, a second bit block, and a third bit block. The first bit block in the first DCI indicates a retransmission of the Preamble, the second bit block in the first DCI indicates the first Preamble, and the third bit block in the first DCI indicates the first cell.

[0815] As an example, the first DCI triggers the first random access procedure.

[0816] The third transmitter 1201 transmits a second DCI, which includes a first bit block, a second bit block, and a third bit block. The first bit block in the second DCI indicates the initial transmission or retransmission of the Preamble, the second bit block in the second DCI indicates the second Preamble, and the third bit block in the second DCI indicates the first cell.

[0817] As an example, the first counter is set to an initial value after the receiver of the second DCI receives the second DCI, and the first counter is set to an initial value before the receiver of the second DCI receives the first DCI; the second Preamble is the last Preamble sent before the first Preamble.

[0818] As one embodiment, the third transmitter 1201 includes the appendix to this application. Figure 4 The antenna 420, transmitter 418, multi-antenna transmitter processor 471, transmitter processor 416, controller / processor 475, or memory 476 are at least one of them.

[0819] As one embodiment, the third transmitter 1201 includes the appendix to this application. Figure 4 At least antenna 420 and transmitter 418 are included.

[0820] 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.

[0821] 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 method for use in a terminal, characterized in that, include: In response to the fulfillment of any condition in the first set of conditions, the first counter is set to its initial value; The first MAC entity performs a first random access procedure on the first cell. The execution of the first random access procedure includes calculating the target received power of the first preamble according to the first counter and instructing the physical layer to send the first preamble. The first MAC entity is the MAC entity corresponding to the first cell group. Wherein, the first set of conditions includes at least one of a first condition, a second condition, a third condition, or a fourth condition; the first condition depends on the first MAC entity being reset; the second condition includes the first cell group being deactivated; the third condition includes the successful completion of a second random access procedure, which is a random access procedure initiated by the first MAC entity before the first random access procedure; the fourth condition depends on receiving the target DCI on a second cell, which is not the first cell.

2. The method according to claim 1, characterized in that, include: Receive a first RRC message, which indicates the configuration information of the first cell; In response to the receipt of the first RRC message, the configuration information of the first cell is stored in the first UE variable; The configuration information of the first cell includes the random access information of the first cell.

3. The method according to claim 1 or 2, characterized in that, include: A first DCI is received on a first serving cell. The first DCI includes a first bit block, a second bit block, and a third bit block. The first bit block in the first DCI indicates a retransmission of a preamble, the second bit block in the first DCI indicates the first preamble, and the third bit block in the first DCI indicates the first cell. The first DCI triggers the first random access procedure.

4. The method according to claim 3, characterized in that, include: Receive a second DCI, the second DCI including a first bit block, a second bit block and a third bit block, the first bit block in the second DCI indicating the initial transmission or retransmission of the Preamble, the second bit block in the second DCI indicating the second Preamble, and the third bit block in the second DCI indicating the first cell; Specifically, the first counter is set to its initial value after the second DCI is received, and the first counter is set to its initial value before the first DCI is received; the second Preamble is the last Preamble sent before the first Preamble.

5. The method according to any one of claims 1 to 4, characterized in that, During the initialization of the first random access procedure, the first counter is not set.

6. The method according to any one of claims 1 to 5, characterized in that, Before the action sets the first counter to its initial value, the first counter is greater than the initial value.

7. The method according to any one of claims 1 to 6, characterized in that, Determine the first counter; the determination of the first counter depends on the behavior of setting the first counter to an initial value.

8. The method according to any one of claims 1 to 7, characterized in that, During the initialization of the first random access procedure, the first counter is always at the initial value; the first counter being always at the initial value during the initialization of the first random access procedure depends on the behavior setting the first counter to the initial value.

9. A terminal, characterized in that, The terminal includes: one or more processors and memory; The memory is coupled to the one or more processors, the memory being used to store computer program code, the computer program code including computer instructions, the one or more processors invoking the computer instructions to cause the terminal to perform the method as described in any one of claims 1 to 8.

10. A method for use in a base station, characterized in that, include: During the first random access process, the first Preamble is received; In response to the fulfillment of any condition in the first set of conditions, the sender of the first Preamble sets the first counter to an initial value. A first MAC entity executes the first random access procedure on a first cell, the execution of the first random access procedure including calculating the target received power of a first preamble according to a first counter, the first MAC entity being the MAC entity corresponding to a first cell group; the first condition set includes at least one of a first condition, a second condition, a third condition, or a fourth condition; the first condition depends on the first MAC entity being reset; the second condition includes the first cell group being deactivated; the third condition includes the successful completion of a second random access procedure, the second random access procedure being a random access procedure initiated by the first MAC entity before the first random access procedure; the fourth condition depends on the sender of the first preamble receiving the target DCI on a second cell, the second cell being not the first cell.

11. The method according to claim 10, characterized in that, include: The sender of the first Preamble receives a first RRC message, which indicates the configuration information of the first cell; In response to the receipt of the first RRC message, the sender of the first Preamble stores the configuration information of the first cell in the first UE variable; The configuration information of the first cell includes the random access information of the first cell.

12. The method according to claim 10 or 11, characterized in that, include: The sender of the first Preamble receives the first DCI on the first serving cell. The first DCI includes a first bit block, a second bit block, and a third bit block. The first bit block in the first DCI indicates a retransmission of the Preamble, the second bit block in the first DCI indicates the first Preamble, and the third bit block in the first DCI indicates the first cell. The first DCI triggers the first random access procedure.

13. The method according to claim 12, characterized in that, include: The sender of the first Preamble receives the second DCI, which includes a first bit block, a second bit block, and a third bit block. The first bit block in the second DCI indicates the initial transmission or retransmission of the Preamble, the second bit block in the second DCI indicates the second Preamble, and the third bit block in the second DCI indicates the first cell. Specifically, the first counter is set to its initial value after the sender of the first Preamble receives the second DCI, and the first counter is set to its initial value before the sender of the first Preamble receives the first DCI; the second Preamble is the last Preamble sent before the first Preamble.

14. The method according to any one of claims 10 to 13, characterized in that, During the initialization of the first random access procedure, the first counter is not set.

15. The method according to any one of claims 10 to 14, characterized in that, Before the action sets the first counter to its initial value, the first counter is greater than the initial value.

16. The method according to any one of claims 10 to 15, characterized in that, The first counter is determined to be set to an initial value based on the behavior described above.

17. The method according to any one of claims 10 to 16, characterized in that, During the initialization of the first random access procedure, the first counter is always at the initial value; the first counter being always at the initial value during the initialization of the first random access procedure depends on the behavior setting the first counter to the initial value.

18. A base station, characterized in that, The base station includes: one or more processors and a memory; The memory is coupled to the one or more processors, the memory being used to store computer program code, the computer program code including computer instructions, the one or more processors invoking the computer instructions to cause the base station to perform the method as described in any one of claims 10 to 17.

19. A method for use in a base station, characterized in that, include: The third transmitter sends a first RRC message, which indicates the configuration information of the first cell; The configuration information of the first cell includes the random access information of the first cell; In response to the satisfaction of any condition in the first set of conditions, the receiver of the first RRC message sets the first counter to an initial value. A first MAC entity performs a first random access procedure on a first cell, the execution of the first random access procedure including calculating the target received power of a first preamble according to a first counter, instructing the physical layer to send the first preamble, the first MAC entity being the MAC entity corresponding to a first cell group; the first condition set includes at least one of a first condition, a second condition, a third condition, or a fourth condition; the first condition depends on the first MAC entity being reset; the second condition includes the first cell group being deactivated; the third condition includes the successful completion of a second random access procedure, the second random access procedure being a random access procedure initiated by the first MAC entity before the first random access procedure; the fourth condition depends on receiving a target DCI on a second cell, the second cell being not the first cell.

20. The method according to claim 19, characterized in that, include: A first DCI is transmitted on a first serving cell. The first DCI includes a first bit block, a second bit block, and a third bit block. The first bit block in the first DCI indicates a retransmission of the preamble, the second bit block in the first DCI indicates the first preamble, and the third bit block in the first DCI indicates the first cell. The first DCI triggers the first random access procedure.

21. The method according to claim 20, characterized in that, include: A second DCI is transmitted, comprising a first bit block, a second bit block, and a third bit block. The first bit block in the second DCI indicates the initial transmission or retransmission of a preamble, the second bit block in the second DCI indicates a second preamble, and the third bit block in the second DCI indicates the first cell. The first counter is set to its initial value after the receiver of the second DCI receives the second DCI, and the first counter is set to its initial value before the receiver of the second DCI receives the first DCI. The second Preamble is the last Preamble sent before the first Preamble.

22. A base station, characterized in that, The base station includes: one or more processors and a memory; The memory is coupled to the one or more processors, the memory being used to store computer program code, the computer program code including computer instructions, the one or more processors invoking the computer instructions to cause the base station to perform the method as described in any one of claims 19 to 21.

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