Method and apparatus used in communication node for wireless communication

Abstract

Disclosed in the present application are a method and apparatus used in a communication node for wireless communication. The method comprises: a communication node sending a first preamble on a first cell, the first preamble indicating at least one downlink physical layer signal; determining whether to trigger a first action, the first action comprising sending a preamble; and, after the first preamble is sent, monitoring for a first downlink physical layer signal, the first downlink physical layer signal being one downlink physical layer signal among the at least one downlink physical layer signal. The determination of whether to trigger the first action depends on whether the first downlink physical layer signal is detected; if the first downlink physical layer signal is detected, the first action is not triggered; if the first downlink physical layer signal is not detected, the first action is triggered. The at least one downlink physical layer signal is not DCI. The solution provided by the present application reduces the overhead of PDCCHs and facilitates UE energy saving.

Description

A method and apparatus for use in a communication node for wireless communication Technical Field

[0001] The present application relates to a transmission method and apparatus in a wireless communication system, and in particular to a transmission method and apparatus for random access (RA). Background Art

[0002] To reduce environmental impact, 3GPP supports Network Energy Saving (NES) in Release 18, with discontinuous transmission (DTX) and / or discontinuous reception (DRX) as key implementations. To further improve network energy efficiency, the transmission of downlink physical layer signals (especially but not limited to SSB (Synchronization Signal) / PBCH (Physical Broadcast Channel) blocks) for on-demand services is considered a key evolutionary direction for Release 19.

[0003] Existing network deployments still have problems such as coverage blind spots and poor edge coverage. How to enhance coverage is an important direction for the future evolution of 3GPP (3rd Generation Partner Project). Among them, the Reconfigurable Intelligent Surface (RIS) is an artificial electromagnetic surface structure with programmable electromagnetic properties. It contains a large number of independent low-cost passive subwavelength resonant units. By superimposing the wireless response signals of a large number of RIS units, specific beam propagation characteristics are formed on a macro scale, thereby forming a flexible and controllable shaped beam, achieving the effect of eliminating coverage blind spots, enhancing edge coverage and increasing the rank of multi-stream transmission. Therefore, the Reconfigurable Intelligent Surface is regarded as a key technology for 5G (5th Generation)-Advanced stage research and one of the core visions of 6G (6th Generation) due to its low cost, low energy consumption, programmability, easy deployment, and high shaping gain with a larger antenna scale.

[0004] Random access is widely used for initial access, uplink synchronization (UL synchronisation), small data transmission (SDT), system information (SI) request, beam failure recovery (BFR), etc. In the existing random access process, the UE sends a preamble and listens for a random access response (Random Access Response, RAR) in a time window. When the random access response is received, the random access process is considered to be successfully completed. If the random access process is not completed, the preamble is resent.

[0005] Summary of the Invention

[0006] In the existing random access process, the UE monitors the random access response through the PDCCH. Through research, the inventors found that with the diversification of wireless communication scenarios, the random access process can be used for more purposes, which can not only improve the utilization rate of random access resources, but also reduce the complexity of protocol formulation, especially but not limited to requesting the base station to send a downlink physical layer signal through the Preamble; however, the method of monitoring the random access response through the PDCCH is not suitable for the scenario where the base station is requested to send a downlink physical layer signal through the Preamble. There are problems such as inaccurate random access responses or being detrimental to UE energy saving. Therefore, it is necessary to enhance the random access process.

[0007] To address the above-mentioned issues, this application provides a solution. While the NR system is used as an example in the description of the above-mentioned issues, this application is also applicable to scenarios such as LTE (Long-Term Evolution), LTE-A (Long-Term Evolution Advanced), 5G-A, or 6G systems, achieving similar technical effects as the NR system. Furthermore, while this application provides specific implementations for downlink physical layer signals, it can also be applied to scenarios such as sidelink signals, achieving similar technical effects as downlink physical layer signals. Furthermore, adopting a unified design for different scenarios can also help reduce hardware complexity and cost. Furthermore, while this application provides specific implementations for NES, it can also be applied to IRS scenarios, achieving similar technical effects as NES. Furthermore, while this application provides specific implementations for SSB, it can also be applied to scenarios such as PRS, achieving similar technical effects as SSB. Furthermore, while this application is initially intended for the Uu air interface, it can also be applied to the PC5 interface, achieving similar technical effects as the Uu air interface. Furthermore, although the original intention of this application is for the terminal and base station scenario, this application is also applicable to the V2X (Vehicle-to-Everything, Internet of Vehicles) scenario, the communication scenario between the terminal and the relay, and the relay and the base station, to achieve similar technical effects in the terminal and base station scenario. Furthermore, although the original intention of this application is for the terminal and base station scenario, this application is also applicable to the IAB (Integrated Access and Backhaul, integrated access and backhaul) communication scenario, to achieve similar technical effects in the terminal and base station scenario. Furthermore, although the original intention of this application is for the terrestrial network (TN) scenario, this application is also applicable to the non-terrestrial network (NTN) communication scenario, to achieve similar technical effects in the TN scenario. In addition, the use of a unified solution for different scenarios can also help reduce hardware complexity and cost.

[0008] As an embodiment, the interpretation of the terms in this application refers to the definition of the 3GPP specification protocol TS38 series.

[0009] As an embodiment, the interpretation of the terms in this application refers to the definitions of the 3GPP specification protocol TS37 series.

[0010] It should be noted that, in the absence of conflict, the embodiments and features in any node of the present application can be applied to any other node. In the absence of conflict, the embodiments and features in the embodiments of the present application can be arbitrarily combined with each other.

[0011] The present application discloses a method in a first node used for wireless communication, characterized by comprising:

[0012] Sending a first preamble on a first cell, where the first preamble indicates at least one downlink physical layer signal; determining whether to trigger a first action, where the first action includes sending the preamble;

[0013] After the first preamble is sent, monitoring a first downlink physical layer signal, where the first downlink physical layer signal is one of the at least one downlink physical layer signal;

[0014] Among them, the determination of whether to trigger the first action depends on whether the first downlink physical layer signal is monitored; if the first downlink physical layer signal is monitored, the first action is not triggered; if at least the first downlink physical layer signal is not monitored, the first action is triggered; the at least one downlink physical layer signal is not DCI (Downlink Control Information).

[0015] As an embodiment, the problem to be solved by this application includes: how to reduce the impact on UE while saving energy in the network.

[0016] As an embodiment, the problem to be solved by this application includes: how to reduce the energy consumption of UE while saving energy in the network.

[0017] As an embodiment, the problem to be solved by the present application includes: how to determine whether to trigger the first action.

[0018] As an embodiment, the characteristics of the above method include: the determination of whether to trigger the first action depends on whether the first downlink physical layer signal is monitored; and the at least one downlink physical layer signal is not DCI.

[0019] As an embodiment, the characteristics of the above method include: if the first downlink physical layer signal is detected, the first action is not triggered; if at least the first downlink physical layer signal is not detected, the first action is triggered; and the at least one downlink physical layer signal is not DCI.

[0020] As an embodiment, the benefits of the above method include: terminating the random access process early.

[0021] As an embodiment, the benefits of the above method include: simplifying the random access process.

[0022] As an embodiment, the benefits of the above method include: reducing PDCCH overhead.

[0023] As an embodiment, the benefits of the above method include: being beneficial to UE energy saving.

[0024] As an embodiment, the benefits of the above method include: avoiding the problem of inaccurate random access response.

[0025] As an embodiment, the benefits of the above method include: being beneficial to network energy saving and UE energy saving.

[0026] As an embodiment, the benefits of the above method include: being conducive to achieving network energy saving while reducing the impact on UE.

[0027] According to one aspect of the present application, it is characterized in that the at least one downlink physical layer signal is a plurality of downlink physical layer signals; and the first downlink physical layer signal is any downlink physical layer among the plurality of downlink physical layer signals.

[0028] As an embodiment, the characteristics of the above method include: the first Preamble indicates the multiple downlink physical layer signals; if any downlink physical layer of the multiple downlink physical layer signals is monitored, the first action is not performed.

[0029] As an embodiment, the above method has the following advantages: compared with a Preamble indicating only one downlink physical layer signal, signaling overhead is reduced.

[0030] As an embodiment, the above method has the following advantages: compared with a Preamble indicating only one downlink physical layer signal, the number of random access processes is reduced.

[0031] As an embodiment, the above method has the following benefits: compared with detecting only the first downlink physical layer signal, the efficiency of the random access process is improved.

[0032] According to one aspect of the present application, it is characterized by comprising:

[0033] In response to the first preamble being sent, monitoring the at least one downlink physical layer signal in a first time window;

[0034] The monitoring of the at least one downlink physical layer signal in the first time window includes monitoring the first downlink physical layer signal.

[0035] As an embodiment, the characteristics of the above method include: controlling the time of monitoring the at least one downlink physical layer signal through the first time window.

[0036] As an embodiment, the benefits of the above method include: avoiding monitoring the at least one downlink physical layer signal for too long.

[0037] As an embodiment, the benefits of the above method include: being conducive to triggering the first action in a timely manner.

[0038] According to one aspect of the present application, it is characterized in that the starting time of the first time window depends on the earliest downlink physical layer signal in the time domain among the at least one downlink physical layer signal.

[0039] According to one aspect of the present application, it is characterized in that at least one of the at least one downlink physical layer signal belongs to a second cell; the first cell and the second cell are different.

[0040] As an embodiment, the benefits of the above method include: there is no need to maintain the random access information of the second cell.

[0041] As an embodiment, the benefits of the above method include: there is no need to maintain downlink synchronization of the second cell.

[0042] As an embodiment, the benefits of the above method include: reducing protocol impact.

[0043] According to one aspect of the present application, it is characterized by comprising:

[0044] In response to the first downlink physical layer signal being monitored, determining that the first random access procedure is successfully completed;

[0045] The not triggering the first action depends on the determination that the first random access procedure is successfully completed; the first random access procedure includes the sending of the first Preamble.

[0046] As an embodiment, the problem to be solved by the present application includes: how to determine whether the first random access process is successfully completed.

[0047] As an embodiment, the problem to be solved by the present application includes: how to determine whether the first random access process is successfully completed.

[0048] As an embodiment, the characteristics of the above method include: in response to the first downlink physical layer signal being monitored, determining that the first random access procedure is successfully completed.

[0049] As an embodiment, the benefits of the above method include: reusing the existing random access process and reducing protocol impact.

[0050] As an embodiment, the benefits of the above method include: being beneficial to UE energy saving.

[0051] As an embodiment, the benefits of the above method include: avoiding the problem of inaccurate random access response.

[0052] According to one aspect of the present application, it is characterized in that the determination of whether to trigger the first action depends on whether the first downlink physical layer signal is monitored, including: if each downlink physical layer signal of the at least one downlink physical layer signal is not monitored, triggering the first action.

[0053] According to one aspect of the present application, it is characterized by comprising:

[0054] receiving a first RRC (Radio Resource Control) message;

[0055] The first RRC message indicates that the PRACH resource corresponding to the first Preamble is associated with the at least one downlink physical layer signal.

[0056] The present application discloses a method used in a second node of wireless communication, characterized by comprising:

[0057] Receiving a first preamble on a first cell, where the first preamble indicates at least one downlink physical layer signal;

[0058] The sender of the first Preamble determines whether to trigger a first action, where the first action includes sending a Preamble; after the first Preamble is sent, the sender of the first Preamble monitors a first downlink physical layer signal, where the first downlink physical layer signal is one of the at least one downlink physical layer signals; the determination of whether to trigger the first action depends on whether the first downlink physical layer signal is monitored; if the first downlink physical layer signal is monitored, the first action is not triggered; if at least the first downlink physical layer signal is not monitored, the first action is triggered; and the at least one downlink physical layer signal is not DCI.

[0059] According to one aspect of the present application, it is characterized in that the at least one downlink physical layer signal is a plurality of downlink physical layer signals; and the first downlink physical layer signal is any downlink physical layer among the plurality of downlink physical layer signals.

[0060] According to one aspect of the present application, it is characterized in that, as a response to the first Preamble being sent, the sender of the first Preamble monitors the at least one downlink physical layer signal in a first time window; and the monitoring of the at least one downlink physical layer signal in the first time window includes monitoring the first downlink physical layer signal.

[0061] According to one aspect of the present application, it is characterized in that the starting time of the first time window depends on the earliest downlink physical layer signal in the time domain among the at least one downlink physical layer signal.

[0062] According to one aspect of the present application, it is characterized in that at least one of the at least one downlink physical layer signal belongs to a second cell; the first cell and the second cell are different.

[0063] According to one aspect of the present application, it is characterized in that, as a response to the first downlink physical layer signal being monitored, the sender of the first Preamble determines that the first random access procedure is successfully completed; the not triggering of the first action depends on the determination that the first random access procedure is successfully completed; the first random access procedure includes sending the first Preamble.

[0064] According to one aspect of the present application, it is characterized in that the determination of whether to trigger the first action depends on whether the first downlink physical layer signal is monitored, including: if each downlink physical layer signal of the at least one downlink physical layer signal is not monitored, triggering the first action.

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

[0066] Sending a first RRC message;

[0067] The first RRC message indicates that the PRACH resource corresponding to the first Preamble is associated with the at least one downlink physical layer signal.

[0068] According to one aspect of the present application, it is characterized by comprising:

[0069] At least one of the at least one downlink physical layer signal is sent in response to the first preamble being received.

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

[0071] Sending a first signaling;

[0072] The first Preamble triggers the first signaling; and the first signaling instructs the sending of at least one of the at least one downlink physical layer signal.

[0073] The present application discloses a method used in a third node for wireless communication, characterized by comprising:

[0074] receiving a first signaling;

[0075] In response to receiving the first signaling, sending at least one of at least one downlink physical layer signal;

[0076] The first signaling is triggered by a first preamble, the first preamble is on a first cell, the first preamble indicates the at least one downlink physical layer signal, and the first signaling indicates sending the at least one of the at least one downlink physical layer signal.

[0077] According to one aspect of the present application, it is characterized in that the sender of the first Preamble determines whether to trigger a first action, and the first action includes sending a Preamble; after the first Preamble is sent, the sender of the first Preamble monitors a first downlink physical layer signal, and the first downlink physical layer signal is a downlink physical layer signal of the at least one downlink physical layer signal; the determination of whether to trigger the first action depends on whether the first downlink physical layer signal is monitored; if the first downlink physical layer signal is monitored, the first action is not triggered; if at least the first downlink physical layer signal is not monitored, the first action is triggered; and the at least one downlink physical layer signal is not DCI.

[0078] According to one aspect of the present application, it is characterized in that the at least one downlink physical layer signal is a plurality of downlink physical layer signals; and the first downlink physical layer signal is any downlink physical layer among the plurality of downlink physical layer signals.

[0079] According to one aspect of the present application, it is characterized in that, as a response to the first Preamble being sent, the sender of the first Preamble monitors the at least one downlink physical layer signal in a first time window; and the monitoring of the at least one downlink physical layer signal in the first time window includes monitoring the first downlink physical layer signal.

[0080] According to one aspect of the present application, it is characterized in that the starting time of the first time window depends on the earliest downlink physical layer signal in the time domain among the at least one downlink physical layer signal.

[0081] According to one aspect of the present application, it is characterized in that at least one of the at least one downlink physical layer signal belongs to a second cell; the first cell and the second cell are different.

[0082] According to one aspect of the present application, it is characterized in that, as a response to the first downlink physical layer signal being monitored, the sender of the first Preamble determines that the first random access procedure is successfully completed; the not triggering of the first action depends on the determination that the first random access procedure is successfully completed; the first random access procedure includes sending the first Preamble.

[0083] According to one aspect of the present application, it is characterized in that the determination of whether to trigger the first action depends on whether the first downlink physical layer signal is monitored, including: if each downlink physical layer signal of the at least one downlink physical layer signal is not monitored, triggering the first action.

[0084] According to one aspect of the present application, it is characterized in that the first RRC message indicates that the PRACH resource corresponding to the first Preamble is associated with the at least one downlink physical layer signal; the sender of the first RRC message is the receiver of the first Preamble.

[0085] The present application discloses a first node used for wireless communication, characterized by comprising:

[0086] A first transmitter sends a first preamble on a first cell, where the first preamble indicates at least one downlink physical layer signal; and determines whether to trigger a first action, where the first action includes sending the preamble.

[0087] A first receiver, after the first preamble is sent, monitoring a first downlink physical layer signal, where the first downlink physical layer signal is one of the at least one downlink physical layer signal;

[0088] Among them, the determination of whether to trigger the first action depends on whether the first downlink physical layer signal is monitored; if the first downlink physical layer signal is monitored, the first action is not triggered; if at least the first downlink physical layer signal is not monitored, the first action is triggered; and the at least one downlink physical layer signal is not DCI.

[0089] The present application discloses a second node used for wireless communication, characterized by comprising:

[0090] A second receiver receives a first preamble on a first cell, where the first preamble indicates at least one downlink physical layer signal;

[0091] The sender of the first Preamble determines whether to trigger a first action, where the first action includes sending a Preamble; after the first Preamble is sent, the sender of the first Preamble monitors a first downlink physical layer signal, where the first downlink physical layer signal is one of the at least one downlink physical layer signals; the determination of whether to trigger the first action depends on whether the first downlink physical layer signal is monitored; if the first downlink physical layer signal is monitored, the first action is not triggered; if at least the first downlink physical layer signal is not monitored, the first action is triggered; and the at least one downlink physical layer signal is not DCI.

[0092] The present application discloses a third node used for wireless communication, characterized by comprising:

[0093] a third receiver, receiving the first signaling;

[0094] a third transmitter, in response to receiving the first signaling, transmitting at least one of at least one downlink physical layer signal;

[0095] The first signaling is triggered by a first preamble, the first preamble is on a first cell, the first preamble indicates the at least one downlink physical layer signal, and the first signaling indicates sending the at least one of the at least one downlink physical layer signal.

[0096] As an embodiment, compared with the traditional solution, the present application has at least one of the following advantages:

[0097] -.Simplified the random access process;

[0098] -.Avoids the problem of inaccurate random access response;

[0099] -. Reduced PDCCH overhead;

[0100] -.Benefits network and UE energy saving;

[0101] -. It helps achieve network energy saving while reducing the impact on UE. BRIEF DESCRIPTION OF THE DRAWINGS

[0102] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0103] FIG1 shows a flow chart of transmission of a first Preamble and a first downlink physical layer signal according to an embodiment of the present application;

[0104] FIG2 shows a schematic diagram of a network architecture according to an embodiment of the present application;

[0105] FIG3 is a schematic diagram showing an embodiment of a radio protocol architecture of a user plane and a control plane according to an embodiment of the present application;

[0106] FIG4 shows a schematic diagram of a first communication device and a second communication device according to an embodiment of the present application;

[0107] FIG5 shows a wireless signal transmission flow chart according to an embodiment of the present application;

[0108] FIG6 shows a flowchart of monitoring the at least one downlink physical layer signal in a first time window according to another embodiment of the present application;

[0109] FIG7 is a schematic diagram showing that at least one downlink physical layer signal is a plurality of downlink physical layer signals according to an embodiment of the present application;

[0110] FIG8 is a schematic diagram showing that the start time of the first time window depends on the earliest downlink physical layer signal in the time domain among at least one downlink physical layer signal according to an embodiment of the present application;

[0111] FIG9 is a schematic diagram showing that at least one of the at least one downlink physical layer signal belongs to the second cell according to an embodiment of the present application;

[0112] FIG10 shows a structural block diagram of a processing device used in a first node according to an embodiment of the present application;

[0113] FIG11 shows a structural block diagram of a processing device used in a second node according to an embodiment of the present application;

[0114] FIG12 shows a structural block diagram of a processing device used in a third node according to an embodiment of the present application. DETAILED DESCRIPTION

[0115] The technical solution of the present application will be further described in detail below in conjunction with the accompanying drawings. It should be noted that, unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other in any way.

[0116] Example 1

[0117] Example 1 illustrates a flowchart of the transmission of the first preamble and the first downlink physical layer signal according to an embodiment of the present application, as shown in Figure 1. In Figure 1, each box represents a step, and it is particularly important to emphasize that the order of the boxes in the figure does not represent the temporal sequence between the steps represented.

[0118] In Example 1, the first node in the present application sends a first Preamble on a first cell in step 101, where the first Preamble indicates at least one downlink physical layer signal; in step 102, determines whether to trigger a first action, where the first action includes sending a Preamble; in step 103, after the first Preamble is sent, monitors a first downlink physical layer signal, where the first downlink physical layer signal is one of the at least one downlink physical layer signals; wherein the determination of whether to trigger the first action depends on whether the first downlink physical layer signal is monitored; if the first downlink physical layer signal is monitored, the first action is not triggered; if at least the first downlink physical layer signal is not monitored, the first action is triggered; and the at least one downlink physical layer signal is not DCI.

[0119] As an embodiment, the first cell is a serving cell of the first node.

[0120] As an embodiment, the serving cell is a PCell (Primary Cell).

[0121] As an embodiment, the serving cell is a PSCell (Primary SCG (Secondary Cell Group) Cell).

[0122] As an embodiment, the serving cell is a SCell (Secondary Cell).

[0123] As an embodiment, the first cell is a candidate cell of the first node.

[0124] As an embodiment, the candidate cell is an LTM candidate cell.

[0125] As an embodiment, the candidate cell is a CHO (Conditional handover) candidate cell.

[0126] As an embodiment, the candidate cell is a CPC (Conditional PSCell change) candidate cell.

[0127] As an embodiment, the first cell is a neighbor cell of a serving cell of the first node.

[0128] As an embodiment, the first Preamble is sent at a PRACH (Physical Random Access Channel) occasion; the one PRACH occasion is configured for the first cell.

[0129] As an embodiment, the first Preamble is sent on the time-frequency resources of the first cell.

[0130] As an embodiment, the meaning that the first Preamble indicates at least one downlink physical layer signal includes: the PRACH resource corresponding to the first Preamble indicates the at least one downlink physical layer signal.

[0131] As an embodiment, the PRACH resource corresponding to the first Preamble is the index of the first Preamble.

[0132] As an embodiment, the PRACH resource corresponding to the first Preamble is the PRACH opportunity occupied by the first Preamble.

[0133] As an embodiment, the PRACH resource corresponding to the first Preamble is the index of the first Preamble and the PRACH opportunity occupied by the first Preamble.

[0134] As an embodiment, the PRACH opportunity includes a PRACH opportunity in the frequency domain.

[0135] As an embodiment, the PRACH opportunity includes a PRACH opportunity in the time domain.

[0136] As an embodiment, the PRACH opportunity includes a PRACH opportunity in the frequency domain and a PRACH opportunity in the time domain.

[0137] As an embodiment, the PRACH resource corresponding to the first Preamble is common to the cell.

[0138] As an embodiment, the PRACH resource corresponding to the first Preamble is UE-specific.

[0139] As an embodiment, the PRACH resource corresponding to the first Preamble is associated with the first downlink physical layer signal.

[0140] As an embodiment, the PRACH resource corresponding to the first Preamble is associated with the at least one downlink physical layer signal.

[0141] As an embodiment, the PRACH resource corresponding to the first Preamble is associated with the at least one downlink physical layer signal, which means that the PRACH resource corresponding to the first Preamble is associated with any downlink physical layer signal of the at least one downlink physical layer signal.

[0142] As an embodiment, the PRACH resource corresponding to the first Preamble is associated with the at least one downlink physical layer signal, which means that the PRACH resource corresponding to the first Preamble is associated with each downlink physical layer signal in the at least one downlink physical layer signal.

[0143] As an embodiment, the PRACH resource corresponding to the first Preamble is associated with a downlink physical layer signal, which means that the PRACH resource corresponding to the first Preamble is configured for the downlink physical layer signal.

[0144] As an embodiment, the PRACH resource corresponding to the first Preamble is associated with the at least one downlink physical layer signal, which means that the PRACH resource corresponding to the first Preamble is for the one downlink physical layer signal.

[0145] As an embodiment, the PRACH resource corresponding to the first Preamble is associated with the at least one downlink physical layer signal, which means that the PRACH resource corresponding to the first Preamble is associated with the one downlink physical layer signal.

[0146] As an embodiment, the PRACH resource corresponding to the first Preamble is associated with the at least one downlink physical layer signal, which means that the one downlink physical layer signal is associated with the PRACH resource corresponding to the first Preamble.

[0147] As an embodiment, the PRACH resource corresponding to the first Preamble is associated with the at least one downlink physical layer signal, which means that the PRACH resource corresponding to the first Preamble is associated with an index of the downlink physical layer signal.

[0148] As an embodiment, the first Preamble indication requests the at least one downlink physical layer signal.

[0149] As a sub-embodiment of the above embodiment, the first Preamble requests the at least one downlink physical layer signal.

[0150] As a sub-embodiment of the above embodiment, the requesting the at least one downlink physical layer signal refers to: requesting to send the at least one downlink physical layer signal.

[0151] As a sub-embodiment of the above embodiment, the requesting the at least one downlink physical layer signal refers to: requesting to turn on the at least one downlink physical layer signal.

[0152] As an embodiment, the first Preamble indicates updating the at least one downlink physical layer signal.

[0153] As a sub-embodiment of the above embodiment, the first Preamble requests to update the at least one downlink physical layer signal.

[0154] As a sub-embodiment of the above embodiment, updating the at least one downlink physical layer signal refers to: updating a spatial parameter of the at least one downlink physical layer signal.

[0155] As a sub-embodiment of the above embodiment, the spatial parameter includes a transmission direction.

[0156] As a sub-embodiment of the above embodiment, the spatial parameter includes transmission power.

[0157] As a sub-embodiment of the above embodiment, the spatial parameter includes coverage.

[0158] As a sub-embodiment of the above embodiment, the spatial parameter includes beam width.

[0159] As a sub-embodiment of the above embodiment, the spatial parameter is at least one of a transmission direction, a transmission power, a coverage range, or a beam width.

[0160] As an embodiment, the number of the at least one downlink physical layer signal is configurable.

[0161] As an embodiment, the number of the at least one downlink physical layer signal is preconfigured.

[0162] As an embodiment, the candidate number of the at least one downlink physical layer signal is equal to 1.

[0163] As an embodiment, the number of candidates for the at least one downlink physical layer signal is not less than 1 and not greater than a threshold.

[0164] As an embodiment, the number of candidates for the at least one downlink physical layer signal is greater than 1 and not greater than a threshold.

[0165] As an embodiment, the threshold is configurable.

[0166] As an embodiment, the threshold is preconfigured.

[0167] As an embodiment, the threshold is 32.

[0168] As an embodiment, the threshold is 64.

[0169] As an embodiment, the threshold is 128.

[0170] As an embodiment, any downlink physical signal in the at least one downlink physical layer signal is a reference signal (Reference Signal).

[0171] As an embodiment, any downlink physical signal in the at least one downlink physical layer signal is a PRS (Positioning RS, positioning reference signal).

[0172] As an embodiment, any downlink physical signal among the at least one downlink physical layer signal includes a downlink synchronization signal.

[0173] As a sub-embodiment of the above embodiment, the downlink synchronization signal is SS.

[0174] As a sub-embodiment of the above embodiment, the downlink synchronization signal is a PSS (Primary SS, primary synchronization signal).

[0175] As a sub-embodiment of the above embodiment, the downlink synchronization signal is an SSS (Secondary SS).

[0176] As an embodiment, any downlink physical signal among the at least one downlink physical layer signal is a downlink synchronization signal.

[0177] As an embodiment, any downlink physical signal among the at least one downlink physical layer signal is an SSB; the SSB includes the downlink synchronization signal.

[0178] As an embodiment, any downlink physical signal in the at least one downlink physical layer signal includes the downlink synchronization signal and PBCH.

[0179] As an embodiment, any downlink physical signal in the at least one downlink physical layer signal includes the downlink synchronization signal, PBCH and DMRS (Demodulation Reference Signal) of the PBCH.

[0180] As an embodiment, any downlink physical signal in the at least one downlink physical layer signal indicates a PCI (Physical Cell Identity) of a cell to which the first Preamble belongs.

[0181] As an embodiment, the at least one downlink physical layer signal belongs to the first cell.

[0182] As a sub-embodiment of the above embodiment, all of the at least one downlink physical layer signal belong to the first cell.

[0183] As a sub-embodiment of the above embodiment, any downlink physical layer signal of the at least one downlink physical layer signal belongs to the first cell.

[0184] As an embodiment, the at least one downlink physical layer signal belongs to multiple cells; the first cell is one of the multiple cells.

[0185] As an embodiment, the at least one downlink physical layer signal belongs to multiple cells; the first cell is not any of the multiple cells.

[0186] As an embodiment, a downlink physical layer signal belonging to a cell means that: the time-frequency resources of the downlink physical layer signal are configured in the cell.

[0187] As an embodiment, a downlink physical layer signal belonging to a cell means that: the downlink physical layer signal indicates the cell.

[0188] As an embodiment, a downlink physical layer signal belonging to a cell means that: the downlink physical layer signal carries the PCI of the cell.

[0189] As an embodiment, the first random access process includes sending the first Preamble on the first cell.

[0190] As an embodiment, the first random access process includes monitoring the first downlink physical layer signal.

[0191] As an embodiment, the first random access process does not include monitoring the first downlink physical layer signal.

[0192] As an embodiment, the first random access process includes determining whether to trigger the first action.

[0193] As an embodiment, the first random access procedure does not include the determination of whether to trigger the first action.

[0194] As an embodiment, the first random access process includes the first action.

[0195] As an embodiment, the first random access procedure does not include the first action.

[0196] As an embodiment, the first random access process includes sending a first preamble on the first cell, determining whether to trigger a first action, the first action and monitoring at least one of a first downlink physical layer signal.

[0197] As an embodiment, the Preamble sent in the first action and the first Preamble sent on the first cell belong to the first random access procedure.

[0198] As an embodiment, within the time interval between sending the first Preamble on the first cell and determining whether to trigger the first action, random access procedure initialization is not performed.

[0199] As an embodiment, the Preamble sent in the first action is a retransmission of the first Preamble sent on the first cell.

[0200] As an embodiment, within the time interval between sending the first Preamble on the first cell and determining whether to trigger the first action, the random access process is initialized and setting the PREAMBLE_POWER_RAMPING_COUNTER to 1 (setting the PREAMBLE_POWER_RAMPING_COUNTER to 1) is not performed.

[0201] As an embodiment, as a response to monitoring the first downlink physical layer signal, it is determined whether to trigger the first action.

[0202] As an embodiment, triggering the first action means: entering the first action.

[0203] As an embodiment, triggering the first action means: continuing the first random access process.

[0204] As an embodiment, triggering the first action refers to: entering the first action.

[0205] As an embodiment, triggering the first action refers to: starting the first action.

[0206] As an embodiment, triggering the first action refers to: continuing the first action.

[0207] As an embodiment, triggering the first action may be replaced by starting the first action.

[0208] As an embodiment, triggering the first action may be replaced by continuing the first action.

[0209] As an embodiment, “if the first downlink physical layer signal is detected, the first action is not triggered” means: as long as the first downlink physical layer signal is detected, the first action is not triggered.

[0210] As an embodiment, “if the first downlink physical layer signal is detected, the first action is not triggered” means: once the first downlink physical layer signal is detected, the first action is not triggered.

[0211] As an embodiment, if the first downlink physical layer signal is detected, monitoring of the at least first downlink physical layer signal is stopped.

[0212] As an embodiment, if the first downlink physical layer signal is monitored, continue to monitor the at least first downlink physical layer signal.

[0213] As an embodiment, if the first downlink physical layer signal is monitored, it is considered that the first downlink physical layer signal is sent.

[0214] As an embodiment, if the first downlink physical layer signal is monitored, it is considered that each downlink physical layer signal in the at least one downlink physical layer signal is sent.

[0215] As an embodiment, if the first downlink physical layer signal is monitored, it is considered that the ongoing random access process is successfully completed.

[0216] As an embodiment, if the first downlink physical layer signal is detected, the ongoing random access process is stopped.

[0217] As an embodiment, if the first downlink physical layer signal is detected, the ongoing random access process is canceled.

[0218] As an embodiment, the ongoing random access procedure is the first random access procedure.

[0219] As an embodiment, the ongoing random access process is a random access process other than the first random access process.

[0220] As an embodiment, “if at least the first downlink physical layer signal is not detected, triggering the first action” means: at least the first downlink physical layer signal is not detected to trigger the first action.

[0221] As an embodiment, “if at least the first downlink physical layer signal is not detected, triggering the first action” means that the first action is triggered by the fact that at least the first downlink physical layer signal is not detected.

[0222] As an embodiment, “if at least the first downlink physical layer signal is not detected, triggering the first action” means that the first action is a response triggered by the fact that at least the first downlink physical layer signal is not detected.

[0223] As an embodiment, the first action is sending a Preamble.

[0224] As an embodiment, the first action includes considering the Random Access Response reception not successful.

[0225] As an embodiment, the first action includes increasing PREAMBLE_TRANSMISSION_COUNTER by 1.

[0226] As an embodiment, the first action includes performing random access resource selection (Random Access Resource selection) and sending a Preamble.

[0227] As an embodiment, after the first Preamble is sent, monitoring of the first downlink physical layer signal begins.

[0228] As an embodiment, after the first Preamble is sent, the first downlink physical layer signal is monitored within a time interval.

[0229] As an embodiment, after the first Preamble is sent, the first downlink physical layer signal is monitored at each receiving occasion of the first downlink physical layer signal.

[0230] As an embodiment, after the first Preamble is sent, the first downlink physical layer signal is monitored at each reception opportunity of the first downlink physical layer signal within a time interval.

[0231] As an embodiment, the first downlink physical layer signal is monitored in a cell to which the first downlink physical layer signal belongs.

[0232] As an embodiment, the first downlink physical layer signal is monitored on the first cell; the first downlink physical layer signal belongs to the first cell.

[0233] As an embodiment, the "after the first Preamble is sent" refers to: once the sending of the first Preamble is completed.

[0234] As an embodiment, the "after the first Preamble is sent" refers to: at least one symbol after the first Preamble is sent.

[0235] As an embodiment, the "after the first Preamble is sent" refers to: when the sending of the first Preamble is finished.

[0236] As an embodiment, the "after the first Preamble is sent" refers to: the first receiving opportunity of the first downlink physical layer signal after the first Preamble is sent.

[0237] As an embodiment, the after the first Preamble is sent refers to: the first receiving opportunity among the receiving opportunities of the at least one downlink physical layer signal after the first Preamble is sent.

[0238] As an embodiment, in response to the first Preamble being sent, only the first downlink physical layer signal among the at least one downlink physical layer signal is monitored.

[0239] As an embodiment, in response to the first Preamble being sent, the at least one downlink physical layer signal is monitored.

[0240] As a sub-embodiment of the above embodiment, monitoring the at least one downlink physical layer signal refers to monitoring each downlink physical signal in the at least one downlink physical layer signal.

[0241] As a sub-embodiment of the above embodiment, each downlink physical layer signal in the at least one downlink physical layer signal is monitored in a cell to which the downlink physical layer signal belongs.

[0242] As a sub-embodiment of the above embodiment, the start time at which the at least one downlink physical layer signal is monitored is the same.

[0243] As a sub-embodiment of the above embodiment, the at least one downlink physical layer signal is monitored within a time interval.

[0244] As a sub-embodiment of the above embodiment, in response to the expiration of the time interval, it is determined whether to trigger the first action.

[0245] As a sub-embodiment of the above embodiment, the at least one downlink physical layer signal is monitored within at least one time interval.

[0246] As a sub-embodiment of the above embodiment, the at least one time interval corresponds to the at least one downlink physical layer signal respectively.

[0247] As a sub-embodiment of the above embodiment, each time interval in the at least one time interval is a reception opportunity for a downlink physical layer signal.

[0248] As a sub-embodiment of the above embodiment, one downlink physical layer signal among the at least one downlink physical layer signal is monitored in each time interval of the at least one time interval.

[0249] As a sub-embodiment of the above embodiment, in response to the expiration of the at least one time interval, it is determined whether to trigger the first action.

[0250] As a sub-embodiment of the above embodiment, the start time of monitoring the at least one downlink physical layer signal is the same as the start time of monitoring the first downlink physical layer signal.

[0251] As a sub-embodiment of the above embodiment, the start time at which the at least one downlink physical layer signal is monitored is different.

[0252] As a sub-embodiment of the above embodiment, for each downlink physical layer signal in the at least one downlink physical layer signal, each downlink physical layer signal is monitored at a first reception opportunity of the downlink physical layer signal after the first Preamble is sent.

[0253] As an embodiment, the first downlink physical layer signal is any downlink physical layer signal among the at least one downlink physical layer signal.

[0254] As an embodiment, the first downlink physical layer signal is a reference downlink physical layer signal in the at least one downlink physical layer signal.

[0255] As a sub-embodiment of the above embodiment, the reference downlink physical layer signal is a default one.

[0256] As a sub-embodiment of the above embodiment, the reference downlink physical layer signal is predefined.

[0257] As a sub-embodiment of the above embodiment, the reference downlink physical layer signal is preconfigured.

[0258] As a sub-embodiment of the above embodiment, the reference downlink physical layer signal is designated.

[0259] As a sub-embodiment of the above embodiment, the reference downlink physical layer signal is indicated by an RRC message.

[0260] As a sub-embodiment of the above embodiment, the reference downlink physical layer signal is the latest downlink physical layer signal in the time domain among the at least one downlink physical layer signal.

[0261] As a sub-embodiment of the above embodiment, the reference downlink physical layer signal is the earliest downlink physical layer signal in the time domain among the at least one downlink physical layer signal.

[0262] As a sub-embodiment of the above embodiment, the reference downlink physical layer signal depends on an index of the at least one downlink physical layer signal.

[0263] As a subsidiary embodiment of the above sub-embodiment, the reference downlink physical layer signal is a downlink physical layer signal with the smallest index among the at least one downlink physical layer signal.

[0264] As a subsidiary embodiment of the above sub-embodiment, the reference downlink physical layer signal is a downlink physical layer signal with the largest index among the at least one downlink physical layer signal.

[0265] As a subsidiary embodiment of the above sub-embodiment, the index is indicated by PSS and SSS in the downlink physical layer signal.

[0266] As a subsidiary embodiment of the above sub-embodiment, the index is indicated by a PSS in a downlink physical layer signal.

[0267] As a subsidiary embodiment of the above sub-embodiment, the index is indicated by SSS in a downlink physical layer signal.

[0268] As a subsidiary embodiment of the above sub-embodiment, the index is indicated by a PBCH in a downlink physical layer signal.

[0269] As a subsidiary embodiment of the above sub-embodiment, the index is PCI.

[0270] As a subsidiary embodiment of the above sub-embodiment, the index is an SSB index.

[0271] As a subsidiary embodiment of the above sub-embodiment, the index is configured by RRC message.

[0272] As an embodiment, the monitoring includes determining.

[0273] As an embodiment, the monitoring includes searching.

[0274] As an embodiment, the monitoring includes receiving.

[0275] As an embodiment, the monitoring includes decoding.

[0276] As an embodiment, the monitoring includes obtaining.

[0277] As an embodiment, the monitoring includes detecting.

[0278] As an embodiment, the detection is a blind detection.

[0279] As an embodiment, the detection is maximum likelihood detection.

[0280] As an embodiment, the detection is a correlation detection.

[0281] As an embodiment, the detection is autocorrelation detection.

[0282] As an embodiment, as a response to the sending of the first Preamble, the downlink physical layer signal is monitored at a reception timing of each downlink physical layer signal in the at least one downlink physical layer signal.

[0283] As an embodiment, as a response to the sending of the first Preamble, the first downlink physical layer signal is monitored at a reception timing of the first downlink physical layer signal.

[0284] As an embodiment, the monitored / not monitored refers to: successfully monitored / not successfully monitored.

[0285] As an embodiment, the monitored / not monitored refers to: successfully monitored / not monitored.

[0286] As an embodiment, the being monitored / not being monitored refers to: being determined to exist / being determined not to exist.

[0287] As an embodiment, the being monitored / not being monitored refers to being determined to exist / not being determined to exist.

[0288] As an embodiment, the monitored / not monitored refers to: received / not received.

[0289] As an embodiment, the determination of whether to trigger the first action depends on whether the first downlink physical layer signal is detected, which means: if the first downlink physical layer signal is detected, the first action is not triggered; if at least the first downlink physical layer signal is not detected, the first action is triggered.

[0290] As an embodiment, the determining whether to trigger the first action depends on whether the first downlink physical layer signal is monitored, which means that whether the first downlink physical layer signal is monitored is used to determine whether to trigger the first action.

[0291] As an embodiment, the determining whether to trigger the first action depends on whether the first downlink physical layer signal is detected, which means that whether to trigger the first action is related only to whether the first downlink physical layer signal is detected.

[0292] As an embodiment, the determining whether to trigger the first action depends on whether the first downlink physical layer signal is monitored, which means that whether to trigger the first action is related to whether at least the first downlink physical layer signal is monitored.

[0293] As an embodiment, the first downlink physical layer signal being monitored means that the first downlink physical layer signal is monitored within the time interval.

[0294] As an embodiment, the meaning of the first downlink physical layer signal being monitored includes: at least one of the at least one physical layer signal is monitored; the first downlink physical layer signal is any one of the at least one physical layer signal.

[0295] As an embodiment, the meaning that the first downlink physical layer signal is monitored includes: receiving a notification from a lower layer that the first downlink physical layer signal is monitored.

[0296] As an embodiment, the meaning of the first downlink physical layer signal being monitored includes: receiving a notification from a lower layer that at least one of the at least one physical layer signals is monitored; the first downlink physical layer signal is any one of the at least one physical layer signal.

[0297] As an embodiment, the fact that at least the first downlink physical layer signal is not monitored means that no notification is received from a lower layer that the first downlink physical layer signal is monitored.

[0298] As an embodiment, the fact that at least the first downlink physical layer signal is not monitored means that no notification is received from a lower layer that any one of the at least one physical layer signal is monitored.

[0299] As an embodiment, the fact that at least the first downlink physical layer signal is not detected means that the first downlink physical layer signal is not detected.

[0300] As an embodiment, the fact that at least the first downlink physical layer signal is not detected means that any downlink physical layer signal among the at least one downlink physical layer signal is not detected.

[0301] As an embodiment, the fact that at least the first downlink physical layer signal is not monitored means that none of the at least one downlink physical layer signal is monitored.

[0302] As an embodiment, the fact that at least the first downlink physical layer signal is not detected means that the first downlink physical layer signal is not detected within the time interval.

[0303] As an embodiment, the fact that at least the first downlink physical layer signal is not monitored means that any downlink physical layer signal of the at least one downlink physical layer signal is not monitored within the time interval.

[0304] As an embodiment, the fact that at least the first downlink physical layer signal is not monitored means that no downlink physical layer signal among the at least one downlink physical layer signal is monitored within the time interval.

[0305] As an embodiment, the meaning of at least the first downlink physical layer signal not being monitored includes: the first downlink physical layer signal not being monitored.

[0306] As an embodiment, the meaning that at least the first downlink physical layer signal is not monitored includes: any downlink physical layer signal among the at least one downlink physical layer signal is not monitored.

[0307] As an embodiment, the meaning that at least the first downlink physical layer signal is not monitored includes: none of the at least one downlink physical layer signal is monitored.

[0308] As an embodiment, the meaning that at least the first downlink physical layer signal is not monitored includes: the first downlink physical layer signal is not monitored within the time interval.

[0309] As an embodiment, the meaning that at least the first downlink physical layer signal is not monitored includes: any downlink physical layer signal of the at least one downlink physical layer signal is not monitored within the time interval.

[0310] As an embodiment, the meaning that at least the first downlink physical layer signal is not monitored includes: no downlink physical layer signal among the at least one downlink physical layer signal is monitored within the time interval.

[0311] As an embodiment, any downlink physical layer signal of the at least one downlink physical layer signal is not transmitted on a PDCCH (Physical Downlink Control Channel).

[0312] As an embodiment, any downlink physical layer signal among the at least one downlink physical layer signal is not DCI.

[0313] As an embodiment, sending the first Preamble on the first cell depends on measurement of the at least one downlink physical layer signal.

[0314] As a sub-embodiment of the above embodiment, the first Preamble is sent in response to a measurement result of the at least one downlink physical layer signal being worse than a threshold.

[0315] As a sub-embodiment of the above embodiment, the first Preamble is sent in response to a measurement result of each downlink physical layer signal in the at least one downlink physical layer signal being worse than a threshold.

[0316] As an embodiment, the sending of the first Preamble on the first cell depends on the at least one downlink physical layer signal not being monitored.

[0317] As a sub-embodiment of the above embodiment, the first Preamble is sent in response to the at least one downlink physical layer signal not being monitored.

[0318] As a sub-embodiment of the above embodiment, the meaning that the at least one downlink physical layer signal is not monitored includes: the at least one downlink physical layer signal is not monitored.

[0319] As a sub-embodiment of the above embodiment, the meaning that the at least one downlink physical layer signal is not monitored includes: the at least one downlink physical layer signal is not sent.

[0320] As a sub-embodiment of the above embodiment, the meaning that the at least one downlink physical layer signal is not monitored includes: the first node does not expect the at least one downlink physical layer signal to be sent.

[0321] As a sub-embodiment of the above embodiment, the meaning that the at least one downlink physical layer signal is not monitored includes: the first node believes that the at least one downlink physical layer signal is not sent.

[0322] As a sub-embodiment of the above embodiment, the meaning that the at least one downlink physical layer signal is not monitored includes: the at least one downlink physical layer signal is configured to be network energy-saving.

[0323] As a sub-embodiment of the above embodiment, the meaning that the at least one downlink physical layer signal is not monitored includes: the at least one downlink physical layer signal is configured as an on-demand service.

[0324] As a sub-embodiment of the above embodiment, the sending of the first Preamble on the first cell depends on the at least one downlink physical layer signal not being monitored within at least a period of time before the first Preamble is sent.

[0325] As a sub-embodiment of the above embodiment, the period of time is indicated by an RRC message.

[0326] As a sub-embodiment of the above embodiment, the period of time is determined by an RRC message.

[0327] As a sub-embodiment of the above embodiment, the period of time is configured.

[0328] Example 2

[0329] Embodiment 2 illustrates a schematic diagram of a network architecture according to an embodiment of the present application, as shown in FIG2 . FIG2 illustrates a network architecture 200 . The network architecture 200 is a 5G NR (New Radio) / LTE (Long-Term Evolution) / LTE-A (Long-Term Evolution Advanced) system, or the network architecture 200 is a 5G+ network architecture, or the network architecture 200 is a 6G network architecture, or the network architecture 200 is a network architecture that will continue to evolve in the future by 3GPP; the network architecture 200 may be called a 5GS (5G System) / EPS (Evolved Packet System), or the network architecture 200 may be called a 6GS (6G System); the network architecture 200 includes at least one of a UE (User Equipment) 201, a RAN (Radio Access Network) 202, a core network 210, an HSS (Home Subscriber Server) / UDM (Unified Data Management) 220, and an Internet service 230. The network architecture 200 can interconnect with other access networks, but for simplicity, these entities / interfaces are not shown. As shown, the network architecture 200 provides packet-switched services, but those skilled in the art will readily appreciate 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 towards 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 appropriate terminology. The core network 210 is a 5G Core Network (5G Core Network) / EPC (Evolved Packet Core), or alternatively, a 6G Core Network; node 203 provides an access point to the core network 210 for UE 201.Examples of UE 201 include cellular phones, smart phones, 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 Internet of Things devices, machine type communication devices, land vehicles, cars, wearable devices, or any other similar functional devices. Those skilled in the art may also refer to UE 201 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, handset, user agent, mobile client, client, or some other suitable term. Node 203 is connected to the core network 210 via an S1 / NG interface. The core network 210 includes the MME (Mobility Management Entity) / AMF (Authentication Management Field) / SMF (Session Management Function) 211, other MMEs / AMFs / SMFs 214, the S-GW (Service Gateway) / UPF (User Plane Function) 212, and the P-GW (Packet Data Network Gateway) / UPF 213. The MME / AMF / SMF 211 is the control node that handles signaling between the UE 201 and the core network 210. Generally, the MME / AMF / SMF 211 provides bearer and connection management. All user Internet Protocol (IP) packets are transmitted through the S-GW / UPF 212, which is itself connected to the P-GW / UPF 213. The P-GW provides UE IP address allocation and other functions. The P-GW / UPF 213 is connected to the Internet service 230. Internet services 230 include operator-specific Internet protocol services, which may include the Internet, intranet, IMS (IP Multimedia Subsystem), and packet-switched streaming services.

[0330] As an embodiment, the UE 201 is a user equipment (UE).

[0331] As an embodiment, the UE 201 is a base station (BS).

[0332] As an embodiment, the UE 201 is a relay device.

[0333] As an embodiment, the UE 201 is a gateway device.

[0334] As an embodiment, the node 203 corresponds to the second node in this application.

[0335] As an embodiment, the node 203 is a base station device.

[0336] As an embodiment, the node 203 is a user equipment.

[0337] As an embodiment, the node 203 is a relay device.

[0338] As an embodiment, the node 203 is a gateway device.

[0339] As an embodiment, the node 204 corresponds to the third node in this application.

[0340] As an embodiment, the node 204 is a base station device.

[0341] As an embodiment, the node 204 is a user equipment.

[0342] As an embodiment, the node 204 is a relay device.

[0343] As an embodiment, the node 204 is a gateway device.

[0344] As an embodiment, the UE 201 maintains connections with the node 203 and the node 204 at the same time.

[0345] As an embodiment, the node 203 and the node 204 are connected via an ideal backhaul.

[0346] As an embodiment, the node 203 and the node 204 are connected via a non-ideal backhaul.

[0347] As an actual example, the node 203 and the node 204 provide wireless resources for the UE 201 at the same time.

[0348] As an example, the node 203 and the node 204 do not provide wireless resources for the UE 201 at the same time.

[0349] As an embodiment, the node 203 and the node 204 are the same node.

[0350] As an embodiment, the node 203 and the node 204 are two different nodes.

[0351] As an embodiment, the node 203 and the node 204 are of the same type.

[0352] As an embodiment, the node 203 and the node 204 are of different types.

[0353] Typically, the UE 201 is a user equipment, the node 203 is a base station device, and the node 204 is a base station device.

[0354] Typically, the UE 201 is a user equipment, the node 203 is a user equipment, and the node 204 is a user equipment.

[0355] Typically, the UE 201 is a base station device, the node 203 is a base station device, and the node 204 is a base station device.

[0356] As an embodiment, the user equipment supports low-latency and high-reliability transmission.

[0357] As an embodiment, the user equipment supports at least one of a non-terrestrial network (NTN) or a terrestrial network (Terrestrial Network).

[0358] As an embodiment, the user equipment supports dual connection (Dual Connection, DC).

[0359] As an embodiment, the user equipment supports carrier aggregation.

[0360] As an embodiment, the user equipment supports RIS.

[0361] As an embodiment, the user equipment supports network energy saving (NES).

[0362] As an embodiment, the first node supports NES.

[0363] As an embodiment, the first node supports SSB-less.

[0364] As an embodiment, the user equipment supports XR.

[0365] As an embodiment, the user equipment is a mobile terminal.

[0366] As an embodiment, the user device is a mobile phone or a tablet.

[0367] As an embodiment, the user equipment is an aircraft.

[0368] As an embodiment, the user device is an Internet of Things device, and the Internet of Things device is an Internet of Things terminal or a vehicle-mounted terminal or a ship or an industrial Internet of Things terminal.

[0369] As an embodiment, the user equipment is a test device or a signaling tester.

[0370] As an embodiment, the user equipment is an IAB (Integrated Access and Backhaul)-MT.

[0371] As an embodiment, the base station device supports transmission in a non-terrestrial network.

[0372] As an embodiment, the base station device supports transmission of a terrestrial network.

[0373] As an embodiment, the base station device is a macro cellular (Marco Cellular) base station or a micro cell (Micro Cell) base station or a pico cell (Pico Cell) base station or a home base station (Femtocell); the base station device is a base transceiver station (Base Transceiver Station, BTS) or a node B (NodeB, NB) or a gNB or an eNB or an ng-eNB or an en-gNB.

[0374] As an embodiment, the base station device includes at least one of a CU (Centralized Unit), a DU (Distributed Unit), or a TRP (Transmitter Receiver Point).

[0375] As an embodiment, the base station device is an aerial node, and the aerial node is a flight platform device, a satellite device, or an NTN base station.

[0376] As an embodiment, the base station device is a test device or a signaling tester.

[0377] As an embodiment, the base station device is a gateway device.

[0378] As an embodiment, the base station device is an IAB node, and the IAB node is an IAB-node or an IAB-donor or an IAB-donor-CU or an IAB-donor-DU or an IAB-DU or an IAB-MT.

[0379] As an embodiment, the relay device is a relay, and the relay is an L3 relay, an L2 relay, or an L1 relay.

[0380] As an embodiment, the relay device is a router.

[0381] As an embodiment, the relay device is a RIS.

[0382] As an embodiment, the relay device is a switch or a gateway device.

[0383] As an embodiment, the relay device is a user equipment.

[0384] As an embodiment, the relay device is a network device.

[0385] Example 3

[0386] Embodiment 3 illustrates a schematic diagram of an embodiment of a radio protocol architecture for a user plane and a control plane according to the present application, as shown in FIG3 . FIG3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane 350 and a control plane 300. FIG3 illustrates the radio protocol architecture for the control plane 300 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. The L1 layer will be referred to herein as PHY 301. Layer 2 (L2 layer) 305 is above PHY 301 and includes a MAC (Medium Access Control) sublayer 302, an RLC (Radio Link Control) sublayer 303, and a PDCP (Packet Data Convergence Protocol) sublayer 304. The PDCP sublayer 304 provides multiplexing between different radio bearers and logical channels. The PDCP sublayer 304 also provides security by encrypting data packets and supports inter-zone mobility. The RLC sublayer 303 provides segmentation and reassembly of upper layer data packets, retransmission of lost data packets, and reordering of data packets to compensate for out-of-order reception due to HARQ (Hybrid Automatic Repeat Request). The MAC sublayer 302 provides multiplexing between logical and transport channels. The MAC sublayer 302 is also responsible for allocating various radio resources (e.g., resource blocks) within a cell. The 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 obtaining radio resources (i.e., radio bearers) and configuring lower layers using RRC signaling. 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 generally identical to the corresponding layers and sublayers in the control plane 300, including the physical layer 351, the PDCP sublayer 354 in the L2 layer 355, the RLC sublayer 353 in the L2 layer 355, and the MAC sublayer 352 in the L2 layer 355. However, the 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, which is responsible for mapping QoS flows to data radio bearers (DRBs) to support service diversity.

[0387] As an embodiment, the wireless protocol architecture in FIG3 is applicable to the first node in this application.

[0388] As an embodiment, the wireless protocol architecture in FIG3 is applicable to the second node in this application.

[0389] As an embodiment, the first Preamble in this application is generated by the PHY301 or PHY351.

[0390] As an embodiment, the first action in the present application includes generating a Preamble in the PHY301 or PHY351.

[0391] As an embodiment, any downlink physical layer signal of the at least one downlink physical layer signal in the present application is generated by the PHY301 or PHY351.

[0392] As an embodiment, the first RRC message in this application is generated in the RRC306.

[0393] Example 4

[0394] Embodiment 4 shows a schematic diagram of a first communication device and a second communication device according to the present application, as shown in Figure 4. Figure 4 is a block diagram of a first communication device 450 and a second communication device 410 communicating with each other in an access network.

[0395] The first communication device 450 includes a controller / processor 459 , a memory 460 , a data source 467 , a transmit processor 468 , a receive processor 456 , a multi-antenna transmit processor 457 , a multi-antenna receive processor 458 , a transmitter / receiver 454 and an antenna 452 .

[0396] The second communication device 410 includes a controller / processor 475 , a memory 476 , a receive processor 470 , a transmit processor 416 , a multi-antenna receive processor 472 , a multi-antenna transmit processor 471 , a transmitter / receiver 418 , and an antenna 420 .

[0397] During transmission from the second communication device 410 to the first communication device 450, upper layer data packets from the core network are provided to the controller / processor 475 at the second communication device 410. The controller / processor 475 implements L2 layer functionality. During 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 retransmission of 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). The transmit processor 416 implements coding and interleaving to facilitate forward error correction (FEC) at the second communication device 410, as well as mapping of signal constellations based on various modulation schemes (e.g., binary phase-shift keying (BPSK), quadrature phase-shift keying (QPSK), M-phase-shift keying (M-PSK), and M-quadrature amplitude modulation (M-QAM)). The multi-antenna transmit processor 471 performs digital spatial precoding, including codebook-based and non-codebook-based precoding, and beamforming on the coded and modulated symbols to generate one or more spatial streams. The transmit processor 416 then maps each spatial stream to a subcarrier, multiplexes it with a reference signal (e.g., a pilot) in the time and / or frequency domain, and then uses an inverse fast Fourier transform (IFFT) to generate a physical channel carrying the time-domain multicarrier symbol stream. The 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 multi-carrier symbol stream provided by the multi-antenna transmit processor 471 into a radio frequency stream, and then provides it to a different antenna 420.

[0398] During 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 via its corresponding antenna 452. Each receiver 454 recovers the information modulated onto the RF carrier and converts the RF stream into a baseband multi-carrier symbol stream, which is provided to the receive processor 456. The receive processor 456 and the multi-antenna receive processor 458 implement various L1 signal processing functions. The multi-antenna receive processor 458 performs receive analog precoding / beamforming operations on the baseband multi-carrier symbol stream from the receiver 454. The receive processor 456 converts the baseband multi-carrier symbol stream, after the receive analog precoding / beamforming operations, from the time domain to the frequency domain using a fast Fourier transform (FFT). In the frequency domain, the receive processor 456 demultiplexes the physical layer data signal and reference signal, where the reference signal is used for channel estimation. The data signal undergoes multi-antenna detection in the multi-antenna receive processor 458 to recover any spatial streams destined for the first communication device 450. The symbols on each spatial stream are demodulated and recovered in the receive processor 456, and soft decisions are generated. 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 on 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 the L2 layer. The controller / processor 459 may be associated with a memory 460 that stores program code and data. The memory 460 may be referred to as a computer-readable medium. During transmission from the second communication device 410 to the first communication device 450, the controller / processor 459 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover upper layer data packets from the core network. The upper layer data packets are then provided to all protocol layers above the L2 layer. Various control signals may also be provided to the L3 layer for L3 processing.

[0399] During transmission from the first communication device 450 to the second communication device 410, a data source 467 is used at the first communication device 450 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 functionality 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 retransmission of lost packets and signaling to the second communication device 410. The transmit processor 468 performs modulation mapping and channel coding, while the multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based and non-codebook-based precoding, and beamforming. The transmit processor 468 then modulates the resulting spatial stream into a multi-carrier / single-carrier symbol stream. After analog precoding and beamforming operations in the multi-antenna transmit processor 457, the stream is provided to different antennas 452 via the transmitter 454. Each transmitter 454 first converts the baseband symbol stream provided by the multi-antenna transmit processor 457 into a RF symbol stream before providing it to the antenna 452.

[0400] During transmission from the first communications device 450 to the second communications device 410, the functionality at the second communications device 410 is similar to the reception functionality at the first communications device 450 described for transmission from the second communications device 410 to the first communications device 450. Each receiver 418 receives RF signals via its corresponding antenna 420, converts the received RF signals into baseband signals, and provides the baseband signals to a multi-antenna receive processor 472 and a receive processor 470. The receive processor 470 and the multi-antenna receive processor 472 collectively implement L1 layer functionality. A controller / processor 475 implements L2 layer functionality. The controller / processor 475 may be associated with a memory 476 storing program codes and data. The memory 476 may be referred to as a computer-readable medium. During transmission from the first communications device 450 to the second communications device 410, the controller / processor 475 provides demultiplexing between transport 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 controller / processor 475 may be provided to the core network.

[0401] As an embodiment, the first communication device 450 includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used together with the at least one processor, and the first communication device 450 at least: sends a first Preamble on a first cell, the first Preamble indicating at least one downlink physical layer signal; determines whether to trigger a first action, the first action including sending a Preamble; after the first Preamble is sent, monitors a first downlink physical layer signal, the first downlink physical layer signal being one of the at least one downlink physical layer signals; wherein, the determination whether to trigger the first action depends on whether the first downlink physical layer signal is monitored; if the first downlink physical layer signal is monitored, the first action is not triggered; if at least the first downlink physical layer signal is not monitored, the first action is triggered; the at least one downlink physical layer signal is not DCI.

[0402] As an embodiment, the first communication device 450 includes: a memory storing a computer-readable instruction program, the computer-readable instruction program generates an action when executed by at least one processor, the action including: sending a first Preamble on a first cell, the first Preamble indicating at least one downlink physical layer signal; determining whether to trigger a first action, the first action including sending a Preamble; after the first Preamble is sent, monitoring a first downlink physical layer signal, the first downlink physical layer signal being one of the at least one downlink physical layer signals; wherein, the determination whether to trigger the first action depends on whether the first downlink physical layer signal is monitored; if the first downlink physical layer signal is monitored, the first action is not triggered; if at least the first downlink physical layer signal is not monitored, the first action is triggered; the at least one downlink physical layer signal is not DCI.

[0403] As an embodiment, the second communication device 410 corresponds to the second node in the present 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 together with the at least one processor. The second communication device 410 at least: receives a first preamble on a first cell, the first preamble indicating at least one downlink physical layer signal; wherein the sender of the first preamble determines whether to trigger a first action, the first action including sending a preamble; after the first preamble is sent, the sender of the first preamble monitors a first downlink physical layer signal, the first downlink physical layer signal being one of the at least one downlink physical layer signals; the determination of whether to trigger the first action depends on whether the first downlink physical layer signal is monitored; if the first downlink physical layer signal is monitored, the first action is not triggered; if at least the first downlink physical layer signal is not monitored, the first action is triggered; the at least one downlink physical layer signal is not DCI.

[0404] As an embodiment, the second communication device 410 corresponds to the second node in the present application; the second communication device 410 includes: a memory storing a computer-readable instruction program, the computer-readable instruction program generates an action when executed by at least one processor, the action including: receiving a first Preamble on a first cell, the first Preamble indicating at least one downlink physical layer signal; wherein the sender of the first Preamble determines whether to trigger a first action, the first action including sending a Preamble; after the first Preamble is sent, the sender of the first Preamble monitors a first downlink physical layer signal, the first downlink physical layer signal being one of the at least one downlink physical layer signals; the determination of whether to trigger the first action depends on whether the first downlink physical layer signal is monitored; if the first downlink physical layer signal is monitored, the first action is not triggered; if at least the first downlink physical layer signal is not monitored, the first action is triggered; the at least one downlink physical layer signal is not DCI.

[0405] As an embodiment, the second communication device 410 corresponds to the third node in the present 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 together with the at least one processor. The second communication device 410 includes at least: a third receiver for receiving first signaling; a third transmitter for sending at least one of at least one downlink physical layer signals in response to the first signaling being received; wherein a first preamble triggers the first signaling, the first preamble is on a first cell, the first preamble indicates the at least one downlink physical layer signal; and the first signaling indicates the sending of the at least one of the at least one downlink physical layer signals.

[0406] As an embodiment, the second communication device 410 corresponds to the third node in the present application; the second communication device 410 includes: a memory storing a computer-readable instruction program, the computer-readable instruction program generates an action when executed by at least one processor, the action including: a third receiver receiving a first signaling; a third transmitter sending at least one of at least one downlink physical layer signals in response to the first signaling being received; wherein, a first preamble triggers the first signaling, the first preamble is on a first cell, and the first preamble indicates the at least one downlink physical layer signal; the first signaling indicates sending the at least one of the at least one downlink physical layer signals.

[0407] As an embodiment, at least one of the antenna 452, the receiver 454, the receive processor 456, and the controller / processor 459 is used to receive at least one downlink physical layer signal.

[0408] As an embodiment, at least one of the antenna 420, the transmitter 418, the transmit processor 416, and the controller / processor 475 is used to send at least one downlink physical layer signal.

[0409] As an embodiment, at least one of the antenna 452, the receiver 454, the receiving processor 456, and the controller / processor 459 is used to receive a first RRC message.

[0410] As an embodiment, at least one of the antenna 420, the transmitter 418, the transmit processor 416, and the controller / processor 475 is used to send a first RRC message.

[0411] As an embodiment, at least one of the antenna 452, the transmitter 454, the transmit processor 468, and the controller / processor 459 is used to send a first preamble.

[0412] As an embodiment, at least one of the antenna 420 , the receiver 418 , the receiving processor 470 , and the controller / processor 475 is used to receive a first preamble.

[0413] As an embodiment, at least one of the antenna 452, the transmitter 454, the transmit processor 468, and the controller / processor 459 is used to transmit the Preamble included in the first action.

[0414] As an 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 Preamble included in the first action.

[0415] As an embodiment, the first communication device 450 corresponds to the first node in this application.

[0416] As an embodiment, the first communication device 450 is a user equipment.

[0417] As an embodiment, the first communication device 450 is a base station device.

[0418] As an embodiment, the first communication device 450 is a relay device.

[0419] As an embodiment, the second communication device 410 is a user equipment.

[0420] As an embodiment, the second communication device 410 is a base station device.

[0421] As an embodiment, the second communication device 410 is a relay device.

[0422] Example 5

[0423] Example 5 illustrates a wireless signal transmission flow chart according to an embodiment of the present application, as shown in FIG5. It should be noted that the order in this example does not limit the signal transmission order and implementation order in the present application.

[0424] For the first node U01, in step S5101, a first RRC message is received; wherein the first RRC message indicates that the PRACH resource corresponding to the first preamble is associated with the at least one downlink physical layer signal; in step S5102, a first preamble is sent on the first cell, wherein the first preamble indicates at least one downlink physical layer signal; in step S5103, after the first preamble is sent, a first downlink physical layer signal is monitored, wherein the first downlink physical layer signal is a downlink physical layer signal among the at least one downlink physical layer signal; in step S5104, it is determined whether the first downlink physical layer signal is monitored; if the first downlink physical layer signal is monitored, the first action is not triggered; if at least the first downlink physical layer signal is not monitored, the first action is triggered; in step S5105(a), the first action is triggered; in step S5105(b), in response to the first downlink physical layer signal being monitored, it is determined that a first random access procedure is successfully completed; wherein the not triggering the first action depends on the determination that the first random access procedure is successfully completed; the first random access procedure includes the sending of the first preamble.

[0425] For the second node N02, in step S5201, the first RRC message is sent; in step S5202, the first Preamble is received; and in step S5203, the first signaling is sent.

[0426] For the third node N03, in step S5301, the first signaling is received.

[0427] In Example 5, the determination of whether to trigger the first action depends on whether the first downlink physical layer signal is monitored; if the first downlink physical layer signal is monitored, the first action is not triggered; if at least the first downlink physical layer signal is not monitored, the first action is triggered; and the at least one downlink physical layer signal is not DCI.

[0428] As an embodiment, the first node U01 and the second node N02 are connected wirelessly.

[0429] As an embodiment, the first node U01 and the second node N02 are connected via a wired connection.

[0430] As an embodiment, the first node U01 and the second node N02 are connected via a Uu port.

[0431] As an embodiment, the first node U01 and the second node N02 are connected via an IAB port.

[0432] As an embodiment, the first node U01 and the second node N02 are connected via a PC5 interface.

[0433] As an embodiment, the second node N02 is a maintaining base station of the first cell.

[0434] As an embodiment, the third node N03 is a maintaining base station of the second cell.

[0435] As an embodiment, the third node N03 and the second node N02 are connected via a wireless interface.

[0436] As an embodiment, the third node N03 and the second node N02 are connected via a wired interface.

[0437] As an embodiment, the third node N03 and the second node N02 are connected via an Xn interface.

[0438] As an embodiment, the third node N03 and the second node N02 are connected via an X2 interface.

[0439] As an embodiment, the backhaul between the third node N03 and the second node N02 is ideal.

[0440] As an embodiment, the backhaul between the third node N03 and the second node N02 is non-ideal.

[0441] As an embodiment, the third node N03 and the second node N02 belong to the same CU.

[0442] As an embodiment, the third node N03 and the second node N02 belong to the same DU.

[0443] As an embodiment, the third node N03 and the second node N02 belong to different CUs.

[0444] As an embodiment, the third node N03 and the second node N02 belong to different DUs.

[0445] As an embodiment, FIG5 is an implementation method of the first RRC message, and does not limit the sender of the first RRC message to be the second node N02.

[0446] As an embodiment, the sender of the first RRC message and the receiver of the first Preamble are the same.

[0447] As an embodiment, the sender of the first RRC message and the receiver of the first Preamble are different.

[0448] As an embodiment, the sender of the first RRC message is a base station maintaining a service cell of the first node U01.

[0449] As an embodiment, the dotted box F5.1 is optional.

[0450] As an embodiment, the dotted box F5.1 exists.

[0451] As a sub-embodiment of the above embodiment, the first RRC message is broadcast.

[0452] As a sub-embodiment of the above embodiment, the first RRC message is cell common.

[0453] As a sub-embodiment of the above embodiment, the first RRC message is mapped to BCCH (Broadcast Control Channel).

[0454] As a sub-embodiment of the above embodiment, the first RRC message is mapped to MCCH (MBS (Multicast / Broadcast Services) Control Channel, MBS control channel).

[0455] As a sub-embodiment of the above embodiment, the first RRC message is a SIB1 (System Information Block 1) message.

[0456] As a sub-embodiment of the above embodiment, the first RRC message is a SIB1 message.

[0457] As a sub-embodiment of the above embodiment, the first RRC message is unicast.

[0458] As a sub-embodiment of the above embodiment, the first RRC message is UE-specific.

[0459] As a sub-embodiment of the above embodiment, the first RRC message is mapped to a DCCH (Dedicated Control Channel).

[0460] As a sub-embodiment of the above embodiment, the first RRC message is mapped to SCCH (Sidelink Control Channel).

[0461] As a sub-embodiment of the above embodiment, the first RRC message is received through SRB1.

[0462] As a sub-embodiment of the above embodiment, the first RRC message is received through SRB3 (Signalling Radio Bearer 3).

[0463] As a sub-embodiment of the above embodiment, the first RRC message is an RRCReconfiguration message.

[0464] As a sub-embodiment of the above embodiment, the first RRC message is an RRCReconfiguration message.

[0465] As a sub-embodiment of the above embodiment, the first RRC message configures random access resources.

[0466] As a sub-embodiment of the above embodiment, the first RRC message includes a RACH-ConfigCommon.

[0467] As a sub-embodiment of the above embodiment, the first RRC message includes a RACH-ConfigGeneric.

[0468] As a sub-embodiment of the above embodiment, the first RRC message includes a RACH-ConfigDedicated.

[0469] As a sub-embodiment of the above embodiment, the first RRC message includes a RACH-ConfigCommonTwoStepRA.

[0470] As a sub-embodiment of the above embodiment, the first RRC message includes a RACH-ConfigGenericTwoStepRA.

[0471] As a sub-embodiment of the above embodiment, the first RRC message includes a first RRC information block and a second RRC information block, the first RRC information block indicates the at least one downlink physical layer signal; the second RRC information block indicates the PRACH resource corresponding to the first Preamble.

[0472] As a sub-embodiment of the above embodiment, the first RRC information block is configured to the second RRC information block.

[0473] As a sub-embodiment of the above embodiment, the second RRC information block is configured to the first RRC information block.

[0474] As a sub-embodiment of the above embodiment, the first RRC information block and the second RRC information block are associated.

[0475] As a sub-embodiment of the above embodiment, the first RRC information block and the second RRC information block belong to the same RRC information block.

[0476] As a sub-embodiment of the above embodiment, the same RRC information block is an RRC IE (Information Element).

[0477] As a sub-embodiment of the above embodiment, the same RRC information block is an RRC field.

[0478] As a sub-embodiment of the above embodiment, the same RRC information block configures a downlink physical layer signal and its associated PRACH resources.

[0479] As a sub-embodiment of the above embodiment, the same RRC information block configuration is used to request PRACH resources of downlink physical layer signals.

[0480] As a sub-embodiment of the above embodiment, the same RRC information block configuration is used to request an update of a PRACH resource of a downlink physical layer signal.

[0481] As a sub-embodiment of the above embodiment, the name of the same RRC information block includes at least one of ondemand, SSB, less, Resource, or Config.

[0482] As a sub-embodiment of the above embodiment, the name of the same RRC information block includes ondemandSSBConfig.

[0483] As a sub-embodiment of the above embodiment, the first RRC information block implicitly indicates the at least one downlink physical layer signal.

[0484] As a sub-embodiment of the above embodiment, the first RRC information block explicitly indicates the at least one downlink physical layer signal.

[0485] As a sub-embodiment of the above embodiment, the first RRC information block indicates the index of the cell to which the at least one downlink physical layer signal belongs.

[0486] As a sub-embodiment of the above embodiment, the index of the cell to which the at least one downlink physical layer signal belongs is configured.

[0487] As a sub-embodiment of the above embodiment, the index of the cell to which the at least one downlink physical layer signal belongs is configured by a PhysCellId.

[0488] As a sub-embodiment of the above embodiment, the index of the cell to which the at least one downlink physical layer signal belongs is configured by a ServCellIndex.

[0489] As a sub-embodiment of the above embodiment, the index of the cell to which the at least one downlink physical layer signal belongs is configured by an SCellIndex.

[0490] As a sub-embodiment of the above embodiment, the index of the cell to which the at least one downlink physical layer signal belongs is configured by a CondReconfigId.

[0491] As a sub-embodiment of the above embodiment, the index of the cell to which the at least one downlink physical layer signal belongs is configured by an LTM-CandidateId.

[0492] As a sub-embodiment of the above embodiment, the first RRC information block indicates the index of the cell to which the at least one downlink physical layer signal belongs and the index of each downlink physical layer signal in the at least one downlink physical layer signal.

[0493] As a sub-embodiment of the above embodiment, the first RRC information block indicates an index of each downlink physical layer signal in the at least one downlink physical layer signal.

[0494] As a sub-embodiment of the above embodiment, the first RRC information block indicates at least one bit map, and the at least one bit map indicates the at least one downlink physical layer signal.

[0495] As a sub-embodiment of the above embodiment, the first RRC information block indicates an index of a cell to which the at least one downlink physical layer signal belongs and at least one bit map, and the at least one bit map indicates the at least one downlink physical layer signal.

[0496] As a sub-embodiment of the above embodiment, the at least one bit map is a first bit map.

[0497] As a subsidiary embodiment of the above sub-embodiment, the bit in the first bitmap corresponding to the at least one downlink physical layer signal is set to 1.

[0498] As a subsidiary embodiment of the above sub-embodiment, the at least one downlink physical layer signal is composed of downlink physical layer signals corresponding to bits set to 1 in the first bitmap.

[0499] As a subsidiary embodiment of the above sub-embodiment, the first RRC information block includes an inOneGroup field, and the inOneGroup field indicates the first bit map.

[0500] As a subsidiary embodiment of the above sub-embodiment, the first RRC information block includes a shortBitmap field, and the shortBitmap field indicates the first bit map.

[0501] As a first subsidiary embodiment of the above sub-embodiment, the first RRC information block includes a mediumBitmap field, and the mediumBitmap field indicates the first bit map.

[0502] As a subsidiary embodiment of the above sub-embodiment, the first RRC information block includes a longBitmap field, and the longBitmap field indicates the first bit map.

[0503] As a sub-embodiment of the above embodiment, the at least one bit map is a first bit map and a second bit map.

[0504] As a sub-embodiment of the above embodiment, the first bit in the second bit map indicates a downlink physical layer signal with an index equal to 0 to 7, the second bit in the second bit map indicates a downlink physical layer signal with an index equal to 8 to 15, and so on.

[0505] As a sub-embodiment of the above embodiment, the first bit in the first bit map corresponds to a downlink physical layer signal with an index equal to 0, 8, ...; the second bit in the first bit map corresponds to a downlink physical layer signal with an index equal to 1, 9, ...

[0506] As a sub-embodiment of the above embodiment, if a bit in the second bit map is set to 1 and a bit in the first bit map is set to 1, the downlink physical layer signal indicated by the one bit in the second bit map and the downlink physical layer signal corresponding to the one bit in the first bit map belongs to the at least one downlink physical layer signal.

[0507] As a sub-embodiment of the above embodiment, if a bit in the second bit map is set to 1 and a bit in the first bit map is set to 0, the downlink physical layer signal indicated by the one bit in the second bit map and the downlink physical layer signal corresponding to the one bit in the first bit map does not belong to the at least one downlink physical layer signal.

[0508] As a sub-embodiment of the above embodiment, if a bit in the second bit map is set to 0, any downlink physical layer signal indicated by the bit in the second bit map does not belong to the at least one downlink physical layer signal.

[0509] As a subsidiary embodiment of the above sub-embodiment, the first RRC information block includes an inOneGroup field and a groupPresence field, and the inOneGroup field and the groupPresence field indicate the at least one downlink physical layer signal.

[0510] As a sub-embodiment of the above embodiment, the second RRC information block indicates the index of the first Preamble.

[0511] As a sub-embodiment of the above embodiment, the second RRC information block indicates the index of the first Preamble and the PRACH opportunity occupied by the first Preamble.

[0512] As a sub-embodiment of the above embodiment, the second RRC information block includes RACH-ConfigGeneric.

[0513] As a sub-embodiment of the above embodiment, the second RRC information block includes ra-OccasionList.

[0514] As a sub-embodiment of the above embodiment, the second RRC information block includes ra-PreambleIndex.

[0515] As a sub-embodiment of the above embodiment, the second RRC information block includes ssb-perRACH-Occasion.

[0516] As a sub-embodiment of the above embodiment, the second RRC information block includes ra-ssb-OccasionMaskIndex.

[0517] As a sub-embodiment of the above embodiment, the second RRC information block is ra-OccasionList.

[0518] As a sub-embodiment of the above embodiment, the second RRC information block is ra-PreambleIndex.

[0519] As an embodiment, the dotted box F5.1 does not exist.

[0520] As an embodiment, the dotted box F5.2 is optional.

[0521] As an embodiment, the dotted box F5.2 exists.

[0522] As a sub-embodiment of the above embodiment, in response to the first Preamble being received, the second node N02 sends the first signaling; the third node N03 receives the first signaling; in response to the first signaling being received, the third node N03 sends the first downlink physical layer signal.

[0523] As a sub-embodiment of the above embodiment, in response to the first Preamble being received, the second node N02 sends the first signaling; the third node N03 receives the first signaling; in response to the first signaling being received, the third node N03 sends at least one of the at least one downlink physical layer signals.

[0524] As a sub-embodiment of the above embodiment, in response to the first Preamble being received, the second node N02 sends the first signaling; the third node N03 receives the first signaling; in response to the first signaling being received, the third node N03 sends the at least one downlink physical layer signal.

[0525] As an embodiment, the dotted box F5.2 does not exist.

[0526] As an embodiment, the dotted box F5.3 is optional.

[0527] As an embodiment, the dotted box F5.3 exists.

[0528] As a sub-embodiment of the above embodiment, in response to the first Preamble being received, the second node N02 sends the first downlink physical layer signal.

[0529] As a sub-embodiment of the above embodiment, in response to the first Preamble being received, the second node N02 sends at least one of the at least one downlink physical layer signal.

[0530] As a sub-embodiment of the above embodiment, in response to the first Preamble being received, the second node N02 sends the at least one downlink physical layer signal.

[0531] As an embodiment, the dotted box F5.3 does not exist.

[0532] As an embodiment, step S5105(b) exists.

[0533] As a sub-embodiment of the above embodiment, the first downlink physical layer signal is monitored within the time interval.

[0534] As a sub-embodiment of the above embodiment, the first downlink physical layer signal is monitored in the first time window.

[0535] As a sub-embodiment of the above embodiment, the first downlink physical layer signal is monitored during a reception opportunity of the first downlink physical layer signal.

[0536] As a sub-embodiment of the above embodiment, the first downlink physical layer signal is monitored after the first preamble is sent.

[0537] As a sub-embodiment of the above embodiment, when the first downlink physical layer signal is monitored, the first time window is running.

[0538] As a sub-embodiment of the above embodiment, when the first downlink physical layer signal is monitored, the first time window is not running.

[0539] As a sub-embodiment of the above embodiment, the meaning of not triggering the first action being dependent on the determination that the first random access procedure is successfully completed includes: the determination that the first random access procedure is successfully completed is used to determine not to trigger the first action.

[0540] As a sub-embodiment of the above embodiment, the meaning of not triggering the first action depending on the determination that the first random access procedure is successfully completed includes: after the determination that the first random access procedure is successfully completed, the first action is not triggered.

[0541] As a sub-embodiment of the above embodiment, the meaning of not triggering the first action depending on the determination that the first random access procedure is successfully completed includes: stopping triggering the first action after determining that the first random access procedure is successfully completed.

[0542] As a sub-embodiment of the above embodiment, the meaning of not triggering the first action depending on the determination that the first random access procedure is successfully completed includes: the determination that the first random access procedure is successfully completed does not trigger the first action.

[0543] As a sub-embodiment of the above embodiment, the fact that at least the first downlink physical layer signal is not monitored means that the random access procedure is not completed.

[0544] As a sub-embodiment of the above embodiment, the first action belongs to the first random access procedure.

[0545] As a sub-embodiment of the above embodiment, triggering the first action / not triggering the first action refers to: triggering the first action / not triggering the first action during the first random access process.

[0546] As a sub-embodiment of the above embodiment, the sending of the first Preamble is for the first random access procedure.

[0547] As a sub-embodiment of the above embodiment, sending the first Preamble belongs to the first random access procedure.

[0548] As a sub-embodiment of the above embodiment, the first Preamble is a Preamble determined in a random access resource selection process of the first random access process.

[0549] As a sub-embodiment of the above embodiment, the first random access process includes monitoring the first downlink physical layer signal.

[0550] As a sub-embodiment of the above embodiment, in the first random access process, RA (Random Access)-RNTI (Radio network temporary identifier) ​​is not calculated.

[0551] As a sub-embodiment of the above embodiment, in the first random access process, the first PDCCH is not monitored.

[0552] As a sub-embodiment of the above embodiment, in the first random access procedure, the RA-RNTI is not calculated and the first PDCCH is not monitored.

[0553] As a sub-embodiment of the above embodiment, the above three sub-embodiments are beneficial to UE energy saving.

[0554] As a sub-embodiment of the above embodiment, the above three sub-embodiments reduce the overhead of the PDCCH.

[0555] As a sub-embodiment of the above embodiment, in the first random access process, RA-RNTI is calculated.

[0556] As a sub-embodiment of the above embodiment, in the first random access process, the MSGB-RNTI is calculated.

[0557] As a sub-embodiment of the above embodiment, in the first random access process, a first PDCCH is monitored.

[0558] As a sub-embodiment of the above embodiment, in the first random access process, the RA-RNTI is calculated and the first PDCCH is monitored.

[0559] As a sub-embodiment of the above embodiment, the above four sub-embodiments reduce the impact on the protocol.

[0560] As a sub-embodiment of the above embodiment, the above four sub-embodiments increase the probability of success of random access.

[0561] As an embodiment, step S5105(b) does not exist.

[0562] As a sub-embodiment of the above embodiment, in response to the sending of the first Preamble, it is determined that the first random access procedure is successfully completed; and the first random access procedure includes sending the first Preamble.

[0563] As a sub-embodiment of the above embodiment, the first random access process does not include monitoring the first downlink physical layer signal.

[0564] As a sub-embodiment of the above embodiment, in the first random access process, RA-RNTI is not calculated.

[0565] As a sub-embodiment of the above embodiment, in the first random access process, the first PDCCH is not monitored.

[0566] As a sub-embodiment of the above embodiment, in the first random access procedure, the RA-RNTI is not calculated and the first PDCCH is not monitored.

[0567] As a sub-embodiment of the above embodiment, the above method is beneficial to UE energy saving.

[0568] As a sub-embodiment of the above embodiment, the above method simplifies the random access process.

[0569] As an embodiment, the first PDCCH is identified by the RA-RNTI.

[0570] As an embodiment, the first PDCCH being identified by the RA-RNTI means that the CRC of the first PDCCH is scrambled by the RA-RNTI.

[0571] As an embodiment, the first PDCCH being identified by the RA-RNTI means that the first PDCCH is addressed to the RA-RNTI.

[0572] As an embodiment, the first PDCCH is identified by the MSGB-RNTI.

[0573] As an embodiment, the first PDCCH being identified by the MSGB-RNTI means that the CRC of the first PDCCH is scrambled by the MSGB-RNTI.

[0574] As an embodiment, the first PDCCH is identified by the MSGB-RNTI, which means that the first PDCCH is addressed to the MSGB-RNTI.

[0575] As an embodiment, the first PDCCH is identified by the C-RNTI of the first node U01.

[0576] As an embodiment, the first PDCCH is identified by the C-RNTI of the first node U01, which means that the CRC of the first PDCCH is scrambled by the C-RNTI of the first node U01.

[0577] As an embodiment, the first PDCCH is identified by the C-RNTI of the first node U01, which means that the first PDCCH is addressed to the C-RNTI of the first node U01.

[0578] As an embodiment, the first PDCCH is on the first cell.

[0579] As an embodiment, the first PDCCH is on the second cell.

[0580] As an embodiment, the first PDCCH is for a first random access response.

[0581] As an embodiment, the fact that at least the first downlink physical layer signal is not detected means that at least the first downlink physical layer signal is not detected and the first random access response is not considered to be successfully received.

[0582] As an embodiment, the first random access response is not considered to be successfully received, including: the first PDCCH is not received.

[0583] As an embodiment, the first random access response is not considered to be successfully received, including: the first random access response is not received.

[0584] As an embodiment, the first random access response is not considered to be successfully received including: the first PDCCH is not monitored.

[0585] Example 6

[0586] Example 6 illustrates a flowchart of monitoring the at least one downlink physical layer signal in the first time window according to an embodiment of the present application, as shown in Figure 6. It should be noted that the order in this example does not limit the signal transmission order and implementation order in this application.

[0587] For the first node U01, in step S6101, as a response to the first Preamble being sent, the first node U01 monitors the at least one downlink physical layer signal in a first time window.

[0588] In embodiment 6, monitoring the at least one downlink physical layer signal in the first time window includes monitoring the first downlink physical layer signal.

[0589] As an embodiment, as a response to monitoring the first downlink physical layer signal, it is determined whether to trigger the first action.

[0590] As an embodiment, as a response to monitoring the at least one downlink physical layer signal, it is determined whether to trigger the first action.

[0591] As an embodiment, in response to the expiration of the first time window, it is determined whether to trigger the first action.

[0592] As an embodiment, the first time window is the time interval.

[0593] As an embodiment, the first time window is a ra-ResponseWindow.

[0594] As an embodiment, the first time window is a msgB-ResponseWindow.

[0595] As an embodiment, the first time window is configurable.

[0596] As an embodiment, the first time window is preconfigured.

[0597] As an embodiment, an RRC message configures the first time window.

[0598] As an embodiment, the first RRC message configures the first time window.

[0599] As an embodiment, the first time window starts after the first Preamble is sent.

[0600] As an embodiment, the first time window starts when the first Preamble finishes being sent.

[0601] As an embodiment, the first time window starts after the first Preamble is sent.

[0602] As an embodiment, in response to the first downlink physical layer signal being monitored, the first time window is stopped.

[0603] As an embodiment, in response to any downlink physical layer signal of the at least one downlink physical layer signal being monitored, the first time window is stopped.

[0604] As an embodiment, if the first time window expires, the first action is triggered.

[0605] As an embodiment, if each downlink physical layer signal of the at least one downlink physical layer signal is not monitored during the operation of the first time window, the first action is triggered.

[0606] As an embodiment, if the first time window expires and each downlink physical layer signal of the at least one downlink physical layer signal is not monitored, the first action is triggered.

[0607] As an embodiment, if the first time window expires and each downlink physical layer signal of the at least one downlink physical layer signal is not monitored and the first random access response is not considered to be successfully received, the first action is triggered.

[0608] As an embodiment, in the first time window, RA-RNTI is not calculated.

[0609] As an embodiment, in the first time window, the first PDCCH is not monitored.

[0610] As an embodiment, in the first time window, the RA-RNTI is not calculated and the first PDCCH is not monitored.

[0611] As an embodiment, RA-RNTI is calculated in the first time window.

[0612] As an embodiment, in the first time window, the MSGB-RNTI is calculated.

[0613] As an embodiment, in the first time window, the first PDCCH is monitored.

[0614] As an embodiment, in the first time window, the RA-RNTI is calculated and the first PDCCH is monitored.

[0615] As an embodiment, when the first time window expires, the first random access response is considered not to be successfully received.

[0616] As an embodiment, when the first time window expires, it is considered that the first random access response has not been successfully received.

[0617] As an embodiment, the fact that at least the first downlink physical layer signal is not detected means that the first time window expires and the at least the first downlink physical layer signal is not detected.

[0618] As an embodiment, the fact that at least the first downlink physical layer signal is not detected means that the first time window expires and the at least the first downlink physical layer signal is not detected and the first random access response is not considered to be successfully received.

[0619] Example 7

[0620] Embodiment 7 illustrates a schematic diagram in which at least one downlink physical layer signal is a plurality of downlink physical layer signals according to an embodiment of the present application.

[0621] In embodiment 7, the at least one downlink physical layer signal is a plurality of downlink physical layer signals; and the first downlink physical layer signal is any downlink physical layer among the plurality of downlink physical layer signals.

[0622] As an embodiment, the first Preamble indicating at least one downlink physical layer signal can be replaced by: the first Preamble indicating multiple downlink physical layer signals; the first downlink physical layer signal is a downlink physical layer signal among the at least one downlink physical layer signal can be replaced by: the first downlink physical layer signal is any downlink physical layer among the multiple downlink physical layer signals.

[0623] As an embodiment, no matter which downlink physical layer among the multiple downlink physical layer signals the first downlink physical layer signal is, if the first downlink physical layer signal is detected, the first action is not triggered.

[0624] As an embodiment, "if the first downlink physical layer signal is detected, the first action is not triggered" means: if any downlink physical layer of the multiple downlink physical layer signals is detected, the first action is not triggered.

[0625] As an embodiment, the multiple downlink physical layer signals belong to the first cell.

[0626] As a sub-embodiment of the above embodiment, the multiple downlink physical layer signals are part of the downlink physical layer signals on the first cell.

[0627] As a sub-embodiment of the above embodiment, the multiple downlink physical layer signals are all downlink physical layer signals on the first cell.

[0628] As a sub-embodiment of the above embodiment, the multiple downlink physical layer signals are part of the downlink physical layer signals indicated as being sent by an ssb-PositionsInBurst field on the first cell.

[0629] As a sub-embodiment of the above embodiment, the multiple downlink physical layer signals are all downlink physical layer signals in the first cell indicated as being sent by an ssb-PositionsInBurst field.

[0630] As a sub-embodiment of the above embodiment, the ssb-PositionsInBurst domain is configured for the first cell.

[0631] As a sub-embodiment of the above embodiment, the ssb-PositionsInBurst field belongs to SIB1 of the first cell.

[0632] As a sub-embodiment of the above embodiment, the ssb-PositionsInBurst field belongs to the ServingCellConfigCommonSIB in the SIB1 of the first cell.

[0633] As an embodiment, at least one of the multiple downlink physical layer signals belongs to the second cell.

[0634] As an embodiment, the multiple downlink physical layer signals belong to the second cell.

[0635] As a sub-embodiment of the above embodiment, the multiple downlink physical layer signals are part of the downlink physical layer signals on the second cell.

[0636] As a sub-embodiment of the above embodiment, the multiple downlink physical layer signals are all downlink physical layer signals on the second cell.

[0637] As a sub-embodiment of the above embodiment, the multiple downlink physical layer signals are part of the downlink physical layer signals indicated as being sent by an ssb-PositionsInBurst field on the second cell.

[0638] As a sub-embodiment of the above embodiment, the multiple downlink physical layer signals are all downlink physical layer signals in the downlink physical layer signals indicated as being sent by an ssb-PositionsInBurst field on the second cell.

[0639] As a sub-embodiment of the above embodiment, the ssb-PositionsInBurst field is configured for the second cell.

[0640] As a sub-embodiment of the above embodiment, the ssb-PositionsInBurst field belongs to SIB1 of the second cell.

[0641] As a sub-embodiment of the above embodiment, the ssb-PositionsInBurst field belongs to the ServingCellConfigCommonSIB in the SIB1 of the second cell.

[0642] Example 8

[0643] Embodiment 8 illustrates a schematic diagram in which the start time of the first time window depends on the earliest downlink physical layer signal in the time domain among at least one downlink physical layer signal according to an embodiment of the present application.

[0644] In embodiment 8, the starting time of the first time window depends on the earliest downlink physical layer signal in the time domain among the at least one downlink physical layer signal.

[0645] As an embodiment, the starting time of the first time window depends on the first symbol occupied by the earliest downlink physical layer signal in the time domain among the at least one downlink physical layer signal.

[0646] As an embodiment, the starting time of the first time window depends on the earliest reception timing of the downlink physical layer signal in the time domain among the at least one downlink physical layer signal.

[0647] As an embodiment, the starting moment of the first time window is determined according to the earliest downlink physical layer signal in the time domain among the at least one downlink physical layer signal.

[0648] As an embodiment, the earliest downlink physical layer signal in the time domain among the at least one downlink physical layer signal refers to the earliest downlink physical layer signal appearing among the at least one downlink physical layer signal after the first preamble is sent.

[0649] As an embodiment, the earliest downlink physical layer signal in the time domain among the at least one downlink physical layer signal refers to a downlink physical layer signal having the earliest reception timing of the at least one downlink physical layer signal after the first preamble is sent.

[0650] As an embodiment, the earliest downlink physical layer signal in the time domain among the at least one downlink physical layer signal refers to the downlink physical layer signal with the earliest starting time of the reception opportunity of the at least one downlink physical layer signal after the first Preamble is sent.

[0651] As an embodiment, the first time window starts from the first symbol occupied by the earliest downlink physical layer signal in the time domain in the at least one downlink physical layer signal.

[0652] As an embodiment, the first time window starts at least one symbol after the first symbol occupied by the earliest downlink physical layer signal in the time domain in the at least one downlink physical layer signal.

[0653] As an embodiment, the first time window starts at the earliest reception timing of the downlink physical layer signal in the time domain among the at least one downlink physical layer signal.

[0654] As an embodiment, the first time window starts with the first symbol of the earliest reception timing of the downlink physical layer signal in the time domain in the at least one downlink physical layer signal.

[0655] As an embodiment, the first time window starts at least one symbol after the first symbol of the earliest reception opportunity of the downlink physical layer signal in the time domain in the at least one downlink physical layer signal.

[0656] Example 9

[0657] Embodiment 9 illustrates a schematic diagram of at least one of at least one downlink physical layer signal belonging to a second cell according to an embodiment of the present application, as shown in FIG9 .

[0658] In embodiment 9, at least one of the at least one downlink physical layer signal belongs to a second cell; the first cell and the second cell are different.

[0659] As an embodiment, the first downlink physical layer signal is monitored on the second cell; the first downlink physical layer signal belongs to at least one of the at least one downlink physical layer signal.

[0660] As an embodiment, at least one of the at least one downlink physical layer signal is monitored on the second cell.

[0661] As an embodiment, all of the at least one downlink physical layer signal belong to the second cell.

[0662] As an embodiment, any downlink physical layer signal among the at least one downlink physical layer signal belongs to the second cell.

[0663] As an embodiment, part of the at least one downlink physical layer signal belongs to the second cell.

[0664] As an embodiment, any one of the at least one downlink physical layer signal does not belong to the first cell.

[0665] As an embodiment, at least one of the at least one downlink physical layer signal belongs to the first cell.

[0666] As an embodiment, the first cell is a serving cell, and the second cell is another serving cell.

[0667] As a sub-embodiment of the above embodiment, the first cell is an SCell, and the second cell is a PCell.

[0668] As a sub-embodiment of the above embodiment, the first cell is a PCell, and the second cell is an SCell.

[0669] As a sub-embodiment of the above embodiment, the first cell is a PCell, and the second cell is a PSCell.

[0670] As an embodiment, the first cell is a serving cell, and the second cell is a cell outside the serving cell.

[0671] As a sub-embodiment of the above embodiment, the second cell is a candidate cell.

[0672] As a sub-embodiment of the above embodiment, the second cell is a target cell.

[0673] As an embodiment, the first cell is a serving cell, and the PCI of the second cell is configured in the ServingCellConfig for the first cell.

[0674] As an embodiment, the first cell and the second cell are different, which means that the PCIs of the first cell and the second cell are different.

[0675] As an embodiment, the first cell and the second cell are different, which means that the first cell and the second cell are of different types.

[0676] As an embodiment, the first cell and the second cell are different, which means that the RATs to which the first cell and the second cell belong are different.

[0677] Example 10

[0678] Embodiment 10 illustrates a structural block diagram of a processing device in a first node according to an embodiment of the present application, as shown in FIG10. In FIG10, the processing device 1000 in the first node includes a first receiver 1001 and a first transmitter 1002.

[0679] The first transmitter 1002 sends a first preamble on a first cell, where the first preamble indicates at least one downlink physical layer signal; and determines whether to trigger a first action, where the first action includes sending the preamble.

[0680] A first receiver 1001 is configured to monitor a first downlink physical layer signal after the first preamble is sent, where the first downlink physical layer signal is one of the at least one downlink physical layer signal;

[0681] In Example 10, the determination of whether to trigger the first action depends on whether the first downlink physical layer signal is monitored; if the first downlink physical layer signal is monitored, the first action is not triggered; if at least the first downlink physical layer signal is not monitored, the first action is triggered; and the at least one downlink physical layer signal is not DCI.

[0682] As an embodiment, the at least one downlink physical layer signal is a plurality of downlink physical layer signals; the first downlink physical layer signal is any downlink physical layer among the plurality of downlink physical layer signals.

[0683] As an embodiment, the first receiver 1001, in response to the first Preamble being sent, monitors the at least one downlink physical layer signal in a first time window; wherein, monitoring the at least one downlink physical layer signal in the first time window includes monitoring the first downlink physical layer signal.

[0684] As an embodiment, the starting time of the first time window depends on the earliest downlink physical layer signal in the time domain among the at least one downlink physical layer signal.

[0685] As an embodiment, at least one of the at least one downlink physical layer signal belongs to a second cell; the first cell and the second cell are different.

[0686] As an embodiment, the first receiver 1001, in response to the first downlink physical layer signal being monitored, determines that the first random access process is successfully completed; wherein, not triggering the first action depends on the determination that the first random access process is successfully completed; the first random access process includes sending the first Preamble.

[0687] As an embodiment, the determining whether to trigger the first action depends on whether the first downlink physical layer signal is monitored, and includes: if each downlink physical layer signal of the at least one downlink physical layer signal is not monitored, triggering the first action.

[0688] As an embodiment, the first receiver 1001 receives a first RRC message; wherein the first RRC message indicates that the PRACH resource corresponding to the first Preamble is associated with the at least one downlink physical layer signal.

[0689] As an embodiment, the first receiver 1001 includes at least one of the antenna 452 or the receiver 454 or the multi-antenna receiving processor 458 or the receiving processor 456 or the controller / processor 459 or the memory 460 or the data source 467 in FIG. 4 of the present application.

[0690] As an embodiment, the first receiver 1001 includes at least the antenna 452 and the receiver 454 in FIG. 4 of the present application.

[0691] As an embodiment, the first transmitter 1002 includes at least one of the antenna 452 or transmitter 454 or multi-antenna transmission processor 457 or transmission processor 468 or controller / processor 459 or memory 460 or data source 467 in FIG. 4 of the present application.

[0692] As an embodiment, the first transmitter 1002 includes at least the antenna 452 and the transmitter 454 in FIG. 4 of the present application.

[0693] Example 11

[0694] Embodiment 11 illustrates a structural block diagram of a processing device in a second node according to an embodiment of the present application, as shown in FIG11. In FIG11, the processing device 1100 in the second node includes a second transmitter 1101 and a second receiver 1102.

[0695] A second receiver 1102 receives a first preamble on a first cell, where the first preamble indicates at least one downlink physical layer signal;

[0696] In Example 11, the sender of the first Preamble determines whether to trigger a first action, and the first action includes sending a Preamble; after the first Preamble is sent, the sender of the first Preamble monitors a first downlink physical layer signal, and the first downlink physical layer signal is a downlink physical layer signal among the at least one downlink physical layer signal; the determination of whether to trigger the first action depends on whether the first downlink physical layer signal is monitored; if the first downlink physical layer signal is monitored, the first action is not triggered; if at least the first downlink physical layer signal is not monitored, the first action is triggered; and the at least one downlink physical layer signal is not DCI.

[0697] As an embodiment, the at least one downlink physical layer signal is a plurality of downlink physical layer signals; the first downlink physical layer signal is any downlink physical layer among the plurality of downlink physical layer signals.

[0698] As an embodiment, in response to the first Preamble being sent, the sender of the first Preamble monitors the at least one downlink physical layer signal in a first time window; the monitoring of the at least one downlink physical layer signal in the first time window includes monitoring the first downlink physical layer signal.

[0699] As an embodiment, the starting time of the first time window depends on the earliest downlink physical layer signal in the time domain among the at least one downlink physical layer signal.

[0700] As an embodiment, at least one of the at least one downlink physical layer signal belongs to a second cell; the first cell and the second cell are different.

[0701] As an embodiment, in response to the first downlink physical layer signal being monitored, the sender of the first Preamble determines that the first random access process is successfully completed; the not triggering of the first action depends on the determination that the first random access process is successfully completed; the first random access process includes sending the first Preamble.

[0702] As an embodiment, the determining whether to trigger the first action depends on whether the first downlink physical layer signal is monitored, and includes: if each downlink physical layer signal of the at least one downlink physical layer signal is not monitored, triggering the first action.

[0703] As an embodiment, the second transmitter 1101 sends a first RRC message; wherein, the first RRC message indicates that the PRACH resource corresponding to the first Preamble is associated with the at least one downlink physical layer signal.

[0704] As an embodiment, the second transmitter 1101 sends at least one of the at least one downlink physical layer signals in response to the first Preamble being received.

[0705] As an embodiment, the second transmitter 1101 sends a first signaling; wherein, the first Preamble triggers the first signaling; and the first signaling indicates the sending of at least one of the at least one downlink physical layer signals.

[0706] As an embodiment, the second transmitter 1101 includes at least one of the antenna 420 or the transmitter 418 or the multi-antenna transmission processor 471 or the transmission processor 416 or the controller / processor 475 or the memory 476 in FIG. 4 of the present application.

[0707] As an embodiment, the second transmitter 1101 includes at least the antenna 420 and the transmitter 418 in FIG. 4 of the present application.

[0708] As an embodiment, the second receiver 1102 includes at least one of the antenna 420 or the receiver 418 or the multi-antenna receiving processor 472 or the receiving processor 470 or the controller / processor 475 or the memory 476 in FIG. 4 of the present application.

[0709] As an embodiment, the second receiver 1102 includes at least the antenna 420 and the receiver 418 in FIG. 4 of the present application.

[0710] Example 12

[0711] Embodiment 12 illustrates a structural block diagram of a processing device in a third node according to an embodiment of the present application, as shown in FIG12. In FIG12, the processing device 1200 in the third node includes a third transmitter 1201 and a third receiver 1202.

[0712] A third receiver 1202 receives the first signaling;

[0713] The third transmitter 1201 transmits at least one of at least one downlink physical layer signal in response to receipt of the first signaling;

[0714] In Example 12, a first preamble triggers the first signaling, the first preamble is on a first cell, the first preamble indicates the at least one downlink physical layer signal; and the first signaling indicates sending the at least one of the at least one downlink physical layer signal.

[0715] As an embodiment, the sender of the first Preamble determines whether to trigger a first action, and the first action includes sending a Preamble; after the first Preamble is sent, the sender of the first Preamble monitors a first downlink physical layer signal, and the first downlink physical layer signal is a downlink physical layer signal among the at least one downlink physical layer signal; the determination of whether to trigger the first action depends on whether the first downlink physical layer signal is monitored; if the first downlink physical layer signal is monitored, the first action is not triggered; if at least the first downlink physical layer signal is not monitored, the first action is triggered; the at least one downlink physical layer signal is not DCI.

[0716] As an embodiment, the at least one downlink physical layer signal is a plurality of downlink physical layer signals; the first downlink physical layer signal is any downlink physical layer among the plurality of downlink physical layer signals.

[0717] As an embodiment, in response to the first Preamble being sent, the sender of the first Preamble monitors the at least one downlink physical layer signal in a first time window; the monitoring of the at least one downlink physical layer signal in the first time window includes monitoring the first downlink physical layer signal.

[0718] As an embodiment, the starting time of the first time window depends on the earliest downlink physical layer signal in the time domain among the at least one downlink physical layer signal.

[0719] As an embodiment, at least one of the at least one downlink physical layer signal belongs to a second cell; the first cell and the second cell are different.

[0720] As an embodiment, in response to the first downlink physical layer signal being monitored, the sender of the first Preamble determines that the first random access process is successfully completed; the not triggering of the first action depends on the determination that the first random access process is successfully completed; the first random access process includes sending the first Preamble.

[0721] As an embodiment, the determining whether to trigger the first action depends on whether the first downlink physical layer signal is monitored, and includes: if each downlink physical layer signal of the at least one downlink physical layer signal is not monitored, triggering the first action.

[0722] As an embodiment, the first RRC message indicates that the PRACH resource corresponding to the first Preamble is associated with the at least one downlink physical layer signal; the sender of the first RRC message is the receiver of the first Preamble.

[0723] As an embodiment, the third transmitter 1201 includes at least one of the antenna 420 or the transmitter 418 or the multi-antenna transmission processor 471 or the transmission processor 416 or the controller / processor 475 or the memory 476 in FIG. 4 of the present application.

[0724] As an embodiment, the third transmitter 1201 includes at least the antenna 420 and the transmitter 418 in FIG. 4 of the present application.

[0725] As an embodiment, the third receiver 1202 includes at least one of the antenna 420 or the receiver 418 or the multi-antenna receiving processor 472 or the receiving processor 470 or the controller / processor 475 or the memory 476 in FIG. 4 of the present application.

[0726] As an embodiment, the third receiver 1202 includes at least the antenna 420 and the receiver 418 in FIG. 4 of the present application.

[0727] Those skilled in the art will appreciate that all or part of the steps in the above method can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a hard disk or an optical disk. Optionally, all or part of the steps in the above embodiment can also be implemented using one or more integrated circuits. Accordingly, each module unit in the above embodiment can be implemented in the form of hardware or in the form of a software functional module. This application is not limited to any specific form of 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, tablet computers, notebooks, vehicle-mounted communication equipment, wireless sensors, internet cards, Internet of Things terminals, RFID terminals, NB-IOT terminals, MTC (Machine Type Communication) terminals, eMTC (enhanced MTC) terminals, data cards, internet cards, vehicle-mounted communication equipment, low-cost mobile phones, low-cost tablet computers and other wireless communication devices. The base stations or system devices in this application include but are not limited to macrocell base stations, microcell base stations, home base stations, relay base stations, gNB (NR node B) NR node B, TRP (Transmitter Receiver Point) and other wireless communication devices.

[0728] The above description is only a preferred embodiment of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A first node used for wireless communication, characterized in that: include: A first transmitter sends a first Preamble on a first cell, where the first Preamble indicates at least one downlink physical layer signal; Determine whether to trigger a first action, where the first action includes sending a Preamble; A first receiver, after the first Preamble is sent, monitoring a first downlink physical layer signal, where the first downlink physical layer signal is a downlink physical layer signal among the at least one downlink physical layer signal; Among them, the determination of whether to trigger the first action depends on whether the first downlink physical layer signal is monitored; if the first downlink physical layer signal is monitored, the first action is not triggered; if at least the first downlink physical layer signal is not monitored, the first action is triggered; and the at least one downlink physical layer signal is not DCI.

2. The first node according to claim 1, characterized in that: The at least one downlink physical layer signal is a plurality of downlink physical layer signals; the first downlink physical layer signal is any downlink physical layer among the plurality of downlink physical layer signals.

3. The first node according to claim 1 or 2, characterized in that: include: The first receiver, in response to the first Preamble being sent, monitors the at least one downlink physical layer signal in a first time window; The monitoring of the at least one downlink physical layer signal in the first time window includes monitoring the first downlink physical layer signal.

4. The first node according to claim 3, characterized in that: The start time of the first time window depends on the earliest downlink physical layer signal in the time domain among the at least one downlink physical layer signal.

5. The first node according to any one of claims 1 to 4, characterized in that: At least one of the at least one downlink physical layer signal belongs to a second cell; the first cell and the second cell are different.

6. The first node according to any one of claims 1 to 5, characterized in that: include: The first receiver, in response to the first downlink physical layer signal being monitored, determines that the first random access procedure is successfully completed; The not triggering the first action depends on the determination that the first random access process is successfully completed; the first random access process includes the sending of the first Preamble.

7. The first node according to any one of claims 1 to 6, characterized in that: The determining whether to trigger the first action depends on whether the first downlink physical layer signal is detected, and includes: if each downlink physical layer signal of the at least one downlink physical layer signal is not detected, triggering the first action.

8. The first node according to any one of claims 1 to 7, characterized in that: include: The first receiver receives a first RRC message; The first RRC message indicates that the PRACH resource corresponding to the first Preamble is associated with the at least one downlink physical layer signal.

9. A method in a first node for wireless communication, characterized in that: include: Sending a first Preamble on a first cell, where the first Preamble indicates at least one downlink physical layer signal; Determine whether to trigger a first action, where the first action includes sending a Preamble; After the first Preamble is sent, monitoring a first downlink physical layer signal, where the first downlink physical layer signal is a downlink physical layer signal among the at least one downlink physical layer signal; Among them, the determination of whether to trigger the first action depends on whether the first downlink physical layer signal is monitored; if the first downlink physical layer signal is monitored, the first action is not triggered; if at least the first downlink physical layer signal is not monitored, the first action is triggered; and the at least one downlink physical layer signal is not DCI.

10. The method in a first node used for wireless communication according to claim 9, characterized in that: The at least one downlink physical layer signal is a plurality of downlink physical layer signals; the first downlink physical layer signal is any downlink physical layer among the plurality of downlink physical layer signals.

11. The method in a first node used for wireless communication according to claim 9 or 10, characterized in that: include: In response to the first Preamble being sent, monitoring the at least one downlink physical layer signal in a first time window; The monitoring of the at least one downlink physical layer signal in the first time window includes monitoring the first downlink physical layer signal.

12. The method in a first node used for wireless communication according to claim 11, characterized in that: The start time of the first time window depends on the earliest downlink physical layer signal in the time domain among the at least one downlink physical layer signal.

13. The method in a first node used for wireless communication according to any one of claims 9 to 12, characterized in that: At least one of the at least one downlink physical layer signal belongs to a second cell; the first cell and the second cell are different.

14. The method in a first node used for wireless communication according to any one of claims 9 to 13, characterized in that: include: In response to the first downlink physical layer signal being monitored, determining that the first random access procedure is successfully completed; The not triggering the first action depends on the determination that the first random access process is successfully completed; the first random access process includes the sending of the first Preamble.

15. The method in a first node for wireless communication according to any one of claims 9 to 14, characterized in that: The determining whether to trigger the first action depends on whether the first downlink physical layer signal is detected, and includes: if each downlink physical layer signal of the at least one downlink physical layer signal is not detected, triggering the first action.

16. The method in a first node used for wireless communication according to any one of claims 9 to 15, characterized in that: include: receiving a first RRC message; The first RRC message indicates that the PRACH resource corresponding to the first Preamble is associated with the at least one downlink physical layer signal.

17. A second node used for wireless communication, characterized in that: include: A second receiver receives a first Preamble on a first cell, where the first Preamble indicates at least one downlink physical layer signal; The sender of the first Preamble determines whether to trigger a first action, and the first action includes sending a Preamble; after the first Preamble is sent, the sender of the first Preamble monitors a first downlink physical layer signal, and the first downlink physical layer signal is a downlink physical layer signal among the at least one downlink physical layer signal; the determination of whether to trigger the first action depends on whether the first downlink physical layer signal is monitored; if the first downlink physical layer signal is monitored, the first action is not triggered; if at least the first downlink physical layer signal is not monitored, the first action is triggered; and the at least one downlink physical layer signal is not DCI.

18. The second node according to claim 17, characterized in that: The at least one downlink physical layer signal is a plurality of downlink physical layer signals; the first downlink physical layer signal is any downlink physical layer among the plurality of downlink physical layer signals.

19. The second node according to claim 17 or 18, characterized in that: In response to the first Preamble being sent, the sender of the first Preamble monitors the at least one downlink physical layer signal in a first time window; the monitoring of the at least one downlink physical layer signal in the first time window includes monitoring the first downlink physical layer signal.

20. The second node according to claim 19, characterized in that: The start time of the first time window depends on the earliest downlink physical layer signal in the time domain among the at least one downlink physical layer signal.

21. The second node according to any one of claims 17 to 20, characterized in that: At least one of the at least one downlink physical layer signal belongs to a second cell; the first cell and the second cell are different.

22. The second node according to any one of claims 17 to 21, characterized in that: In response to the first downlink physical layer signal being monitored, the sender of the first Preamble determines that the first random access procedure is successfully completed; the not triggering the first action depends on the determination that the first random access procedure is successfully completed; The first random access procedure includes sending a first Preamble.

23. The second node according to any one of claims 17 to 22, characterized in that: The determining whether to trigger the first action depends on whether the first downlink physical layer signal is detected, and includes: if each downlink physical layer signal of the at least one downlink physical layer signal is not detected, triggering the first action.

24. The second node according to any one of claims 17 to 23, characterized in that: include: A second transmitter sends a first RRC message; The first RRC message indicates that the PRACH resource corresponding to the first Preamble is associated with the at least one downlink physical layer signal.

25. The second node according to any one of claims 17 to 24, characterized in that: include: The second transmitter transmits at least one of the at least one downlink physical layer signal in response to reception of the first Preamble.

26. The second node according to any one of claims 17 to 25, characterized in that: include: The second transmitter sends a first signaling; The first Preamble triggers the first signaling; The first signaling indicates sending the at least one downlink physical layer signal At least one of .

27. A method in a second node for wireless communication, characterized in that: include: Receiving a first Preamble on a first cell, where the first Preamble indicates at least one downlink physical layer signal; The sender of the first Preamble determines whether to trigger a first action, and the first action includes sending a Preamble; after the first Preamble is sent, the sender of the first Preamble monitors a first downlink physical layer signal, and the first downlink physical layer signal is a downlink physical layer signal among the at least one downlink physical layer signal; the determination of whether to trigger the first action depends on whether the first downlink physical layer signal is monitored; if the first downlink physical layer signal is monitored, the first action is not triggered; if at least the first downlink physical layer signal is not monitored, the first action is triggered; and the at least one downlink physical layer signal is not DCI.

28. The method in the second node used for wireless communication according to claim 27, characterized in that: The at least one downlink physical layer signal is a plurality of downlink physical layer signals; the first downlink physical layer signal is any downlink physical layer among the plurality of downlink physical layer signals.

29. The method in the second node used for wireless communication according to claim 27 or 28, characterized in that: In response to the first Preamble being sent, the sender of the first Preamble monitors the at least one downlink physical layer signal in a first time window; the monitoring of the at least one downlink physical layer signal in the first time window includes monitoring the first downlink physical layer signal.

30. The method in the second node used for wireless communication according to claim 29, characterized in that: The start time of the first time window depends on the earliest downlink physical layer signal in the time domain among the at least one downlink physical layer signal.

31. The method in the second node used for wireless communication according to any one of claims 27 to 30, characterized in that: At least one of the at least one downlink physical layer signal belongs to a second cell; the first cell and the second cell are different.

32. The method in the second node used for wireless communication according to any one of claims 27 to 31, characterized in that: In response to the first downlink physical layer signal being monitored, the sender of the first Preamble determines that the first random access procedure is successfully completed; the not triggering the first action depends on the determination that the first random access procedure is successfully completed; The first random access procedure includes sending a first Preamble.

33. The method in the second node used for wireless communication according to any one of claims 27 to 32, characterized in that: The determining whether to trigger the first action depends on whether the first downlink physical layer signal is detected, and includes: if each downlink physical layer signal of the at least one downlink physical layer signal is not detected, triggering the first action.

34. The method in the second node used for wireless communication according to any one of claims 27 to 33, characterized in that: include: Sending a first RRC message; The first RRC message indicates that the PRACH resource corresponding to the first Preamble is associated with the at least one downlink physical layer signal.

35. The method in the second node used for wireless communication according to any one of claims 27 to 34, characterized in that: include: In response to the first Preamble being received, at least one of the at least one downlink physical layer signal is sent.

36. The method in the second node used for wireless communication according to any one of claims 27 to 35, characterized in that: include: Sending a first signaling; The first Preamble triggers the first signaling; The first signaling indicates sending at least one of the at least one downlink physical layer signal.

37. A third node used for wireless communication, characterized in that: include: A third receiver receives the first signaling; a third transmitter, in response to the first signaling being received, sending at least one of at least one downlink physical layer signal; The first Preamble triggers the first signaling, the first Preamble is on the first cell, the first Preamble indicates the at least one downlink physical layer signal; and the first signaling indicates sending the at least one of the at least one downlink physical layer signal.

38. The third node according to claim 37, characterized in that: The sender of the first Preamble determines whether to trigger a first action, the first action comprising sending a Preamble; after the first Preamble is sent, the sender of the first Preamble monitors a first downlink physical layer signal, the first downlink physical layer signal being one of the at least one downlink physical layer signals; the determination of whether to trigger the first action depends on whether the first downlink physical layer signal is monitored; if the first downlink physical layer signal is monitored, the first action is not triggered; if at least the first downlink physical layer signal is not monitored, the first action is triggered; the at least one downlink physical layer signal is not DCI.

39. The third node according to claim 37 or 38, characterized in that: The at least one downlink physical layer signal is a plurality of downlink physical layer signals; the first downlink physical layer signal is any downlink physical layer among the plurality of downlink physical layer signals.

40. The third node according to any one of claims 37 to 39, characterized in that: In response to the first Preamble being sent, the sender of the first Preamble monitors the at least one downlink physical layer signal in a first time window; the monitoring of the at least one downlink physical layer signal in the first time window includes monitoring the first downlink physical layer signal.

41. The third node according to claim 40, characterized in that: The start time of the first time window depends on the earliest downlink physical layer signal in the time domain among the at least one downlink physical layer signal.

42. The third node according to any one of claims 37 to 41, characterized in that: At least one of the at least one downlink physical layer signal belongs to a second cell; the first cell and the second cell are different.

43. The third node according to any one of claims 37 to 42, characterized in that: In response to the first downlink physical layer signal being monitored, the sender of the first Preamble determines that the first random access procedure is successfully completed; the not triggering the first action depends on the determination that the first random access procedure is successfully completed; The first random access procedure includes sending a first Preamble.

44. The third node according to any one of claims 37 to 43, characterized in that: The determining whether to trigger the first action depends on whether the first downlink physical layer signal is detected, and includes: if each downlink physical layer signal of the at least one downlink physical layer signal is not detected, triggering the first action.

45. The third node according to any one of claims 37 to 44, characterized in that: The first RRC message indicates that the PRACH resource corresponding to the first Preamble is associated with the at least one downlink physical layer signal; the sender of the first RRC message is the receiver of the first Preamble.

46. ​​A method in a third node for wireless communication, characterized in that: include: receiving a first signaling; In response to receiving the first signaling, sending at least one of at least one downlink physical layer signal; The first Preamble triggers the first signaling, the first Preamble is on the first cell, the first Preamble indicates the at least one downlink physical layer signal; and the first signaling indicates sending the at least one of the at least one downlink physical layer signal.

47. The method in the third node used for wireless communication according to claim 46, characterized in that: The sender of the first Preamble determines whether to trigger a first action, the first action comprising sending a Preamble; after the first Preamble is sent, the sender of the first Preamble monitors a first downlink physical layer signal, the first downlink physical layer signal being one of the at least one downlink physical layer signals; the determination of whether to trigger the first action depends on whether the first downlink physical layer signal is monitored; if the first downlink physical layer signal is monitored, the first action is not triggered; if at least the first downlink physical layer signal is not monitored, the first action is triggered; the at least one downlink physical layer signal is not DCI.

48. The method in the third node used for wireless communication according to claim 46 or 47, characterized in that: The at least one downlink physical layer signal is a plurality of downlink physical layer signals; the first downlink physical layer signal is any downlink physical layer among the plurality of downlink physical layer signals.

49. The method in a third node used for wireless communication according to any one of claims 46 to 48, characterized in that: In response to the first Preamble being sent, the sender of the first Preamble monitors the at least one downlink physical layer signal in a first time window; the monitoring of the at least one downlink physical layer signal in the first time window includes monitoring the first downlink physical layer signal.

50. The method in the third node used for wireless communication according to claim 49, characterized in that: The start time of the first time window depends on the earliest downlink physical layer signal in the time domain among the at least one downlink physical layer signal.

51. The method in a third node used for wireless communication according to any one of claims 46 to 50, characterized in that: At least one of the at least one downlink physical layer signal belongs to a second cell; the first cell and the second cell are different.

52. The method in a third node used for wireless communication according to any one of claims 46 to 51, characterized in that: In response to the first downlink physical layer signal being monitored, the sender of the first Preamble determines that the first random access procedure is successfully completed; the not triggering the first action depends on the determination that the first random access procedure is successfully completed; The first random access procedure includes sending a first Preamble.

53. The method in a third node used for wireless communication according to any one of claims 46 to 52, characterized in that: The determining whether to trigger the first action depends on whether the first downlink physical layer signal is detected, and includes: if each downlink physical layer signal of the at least one downlink physical layer signal is not detected, triggering the first action.

54. The method in a third node used for wireless communication according to any one of claims 46 to 53, characterized in that: The first RRC message indicates that the PRACH resource corresponding to the first Preamble is associated with the at least one downlink physical layer signal; the sender of the first RRC message is the receiver of the first Preamble.

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