Method and apparatus in communication node used for wireless communication

Abstract

The invention discloses a method and an apparatus in a communication node used for wireless communication. The communication node receives the first RRC signaling, the first TA command and the first switching command; wherein the first RRC signaling comprises configuration information of a first candidate cell; the first TA command indicates a first TA value of the first candidate cell; the first switching command indicates the first candidate cell, and the first switching command is an MAC CE (Media Access Control CE); in response to the first handover command being received, applying the first TA value and performing a RACH-free handover; the application of the first TA value and the execution of the RACH-free handover depend on a first measurement, and the first measurement is related to the TA; the first candidate cell is configured to a cell group to which the first serving cell belongs. According to the scheme provided by the invention, the validity verification of the candidate cell TA obtained in the early uplink synchronization is realized, and the early uplink synchronization process can be enhanced, so that the method is suitable for LTM cell switching between CUs.

Description

Technical Field

[0001] The present application relates to a transmission method and device in a wireless communication system, and more particularly to a method and device for verifying the validity of a TA in early uplink synchronization. Background Art

[0002] With the continuous development of wireless communications, the requirements for mobility, transmission delay and system capacity are getting higher and higher. 3GPP has completed the standardization of L1 (Layer 1, Layer 1) / L2 (Layer 2, Layer 2) triggered mobility (L1 / L2 Triggered Mobility, LTM) through the "NR (New Radio) Further NR mobility enhancements" research project (Work Item, WI); to further enhance mobility, conditional LTM or inter-CU LTM has become an important research content of 3GPP Release 19.

[0003] To enhance the LTM process, LTM supports UE-based timing advance measurement. The UE measures the downlink receive timing difference between the serving cell and the LTM candidate cell and the uplink timing advance of the serving cell to derive the uplink timing advance of the LTM candidate cell. In order to improve the robustness of LTM early synchronization, it is necessary to improve the validity verification of UE-based timing advance measurement in LTM; in addition, considering that UE-based timing advance measurement can significantly reduce the signaling overhead during the switching process, applying early uplink synchronization to conditional LTM or inter-CU LTM or CHO or CPC has a good standardization prospect. Summary of the invention

[0004] The inventors found that in the existing intra-CU LTM early uplink synchronization process, when the network indicates a target cell TA to the UE, no matter how the channel conditions change, the UE will use this TA to perform LTM cell switching without RACH; on the other hand, the UE may simultaneously perform early RACH-based TA acquisition and UE-based TA measurement. In the existing LTM mechanism, as long as there is a candidate cell TA indicated by the network, the result of the UE-based TA measurement will be ignored. In inter-CU LTM, the above existing mechanisms may lead to unreliable TA and waste of wireless resources. Therefore, it is necessary to enhance the TA acquisition and TA verification mechanisms in the early uplink synchronization process of inter-CU LTM.

[0005] In view of the above problems, the present application provides a solution. In the description of the above problems, the NR system is used as an example. The present application is also applicable to scenarios such as LTE (Long-Term Evolution) or LTE-A (Long-Term Evolution Advanced) or future 6G systems, and achieves technical effects similar to those of the NR system; further, although the present application provides a specific implementation method for the 3GPP system, the present application can also be used in scenarios of non-3GPP systems to achieve technical effects similar to those of the 3GPP system. Furthermore, adopting a unified design scheme for different scenarios can also help reduce hardware complexity and cost. Furthermore, although the original intention of the present application is for the Uu air interface, the present application can also be used for the PC5 port to achieve technical effects similar to those of the Uu air interface. Furthermore, although the original intention of the present application is for LTM, the present application can also be used for conditional LTM or continuous LTM or SCPAC or CHO or CPC, etc., to achieve technical effects similar to those of LTM. 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) 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. Further, 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) communication scenario, to achieve similar technical effects in the terminal and base station scenario. Further, although the original intention of this application is for the terrestrial network (Terrestrial Network, TN) scenario, this application is also applicable to the non-terrestrial network (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 also helps to reduce hardware complexity and cost.

[0006] As an embodiment, the interpretation of the terminology in the present application refers to the definition of the 3GPP specification protocol TS36 series.

[0007] As an example, the interpretation of the terms in the present application refers to the definition of the TS38 series of specification protocols of 3GPP.

[0008] As an example, the interpretation of the terms in the present application refers to the definition of the TS37 series of specification protocols of 3GPP.

[0009] 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.

[0010] The present application discloses a method in a first node used for wireless communication, characterized by comprising:

[0011] receiving a first RRC signaling, a first TA command and a first handover command; wherein the first RRC signaling includes configuration information of a first candidate cell; the first TA command indicates a first TA value of the first candidate cell; the first handover command indicates the first candidate cell, and the first handover command is a MAC CE; in response to the first handover command being received, applying the first TA value and performing a RACH-free handover;

[0012] The applying of the first TA value and performing RACH-free switching depends on a first measurement, and the first measurement is related to the TA; the first candidate cell is configured to the cell group to which the first serving cell belongs.

[0013] As an embodiment, the problem to be solved by the present application includes: how to enhance the early uplink synchronization process to make it suitable for inter-CU LTM cell switching.

[0014] As an embodiment, the problem to be solved by the present application includes: how to enhance the TA verification process based on the PDCCH order in the early uplink synchronization process.

[0015] As an embodiment, the problem to be solved by the present application includes: for a UE configured with both PDCCH order-based early RACH and UE-based TA measurement, how to select a more accurate candidate cell uplink timing advance to avoid resource waste.

[0016] As an embodiment, the characteristics of the above method include: applying the first TA value and performing RACH-free switching relying on a first measurement.

[0017] As an embodiment, the characteristics of the above method include: the first measurement is related to TA.

[0018] As an embodiment, the benefits of the above method include: being conducive to verifying the validity of the candidate cell TA obtained in the early uplink synchronization.

[0019] As an embodiment, the benefits of the above method include: being conducive to selecting a more accurate uplink timing advance and reducing the waste of wireless resources.

[0020] As an embodiment, the benefits of the above method include: facilitating the fallback of LTM cell handover without RACH to LTM cell handover based on RACH.

[0021] As an embodiment, the benefits of the above method include: it is helpful to improve the robustness of the switching process without random access and reduce the probability of switching failure.

[0022] As an embodiment, the benefits of the above method include: it is helpful to ensure the accuracy and effectiveness of the candidate cell TA used.

[0023] As an embodiment, the benefits of the above method include: it is helpful to reduce signaling interaction.

[0024] According to one aspect of the present application, it is characterized in that the first measurement includes measurement of at least a first reference signal of the first candidate cell.

[0025] As an embodiment, the benefits of the above method include: being conducive to monitoring the channel quality of the first candidate cell.

[0026] As an embodiment, the above method has the following benefits: it is helpful to verify the validity of the candidate cell uplink timing obtained by the early RACH based on the PDCCH order.

[0027] As an embodiment, the benefits of the above method include: it is helpful to reduce signaling interaction.

[0028] According to one aspect of the present application, it is characterized in that the first measurement includes UE-based TA measurement of the first candidate cell.

[0029] As an embodiment, the benefits of the above method include: being beneficial to the maintenance of the candidate cell TA.

[0030] According to one aspect of the present application, it is characterized in that it includes:

[0031] receiving a first PDCCH order; and sending a first Preamble as a response to the first PDCCH order being received;

[0032] The first PDCCH order indicates the first Preamble; and the first TA command depends on the first Preamble.

[0033] As an embodiment, the benefits of the above method include: facilitating the acquisition of early timing advance of LTM between CUs.

[0034] As an embodiment, the benefits of the above method include: it is helpful to reduce the delay of LTM cell switching.

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

[0036] In response to the first Preamble being sent, monitoring a first random access response;

[0037] The first random access response includes the first TA command.

[0038] As an embodiment, the benefits of the above method include: it is beneficial to enhance the early uplink synchronization process to be applicable to inter-CU LTM cell switching.

[0039] As an embodiment, the benefits of the above method include: it is helpful to improve the robustness of the LTM process.

[0040] According to one aspect of the present application, it is characterized in that the first handover command does not include a field indicating whether the TA of the first candidate cell is valid.

[0041] As an embodiment, the benefits of the above method include: being conducive to verifying the validity of the first candidate cell TA.

[0042] As an embodiment, the benefits of the above method include: it is helpful to improve the robustness of the LTM process.

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

[0044] receiving a second RRC signaling;

[0045] The first handover command does not include the domain-dependent second RRC signaling indicating whether the TA of the first candidate cell is valid.

[0046] As an embodiment, the benefits of the above method include: reducing changes to existing standards and being easy to implement.

[0047] According to one aspect of the present application, it is characterized in that the first measurement includes time measurement.

[0048] As an embodiment, the benefits of the above method include: being conducive to verifying the validity of the first candidate cell TA.

[0049] The present application discloses a method used in a second node of wireless communication, characterized by comprising:

[0050] Sending a first RRC signaling, a first TA command and a first handover command; wherein the first RRC signaling includes configuration information of a first candidate cell; the first TA command indicates a first TA value of the first candidate cell; the first handover command indicates the first candidate cell, and the first handover command is a MAC CE;

[0051] Among them, the recipient of the first RRC signaling, as a response to receiving the first switching command, applies the first TA value and performs RACH-free switching; the application of the first TA value and the performance of RACH-free switching depend on a first measurement, and the first measurement is related to the TA; the first candidate cell is configured to the cell group to which the first serving cell belongs.

[0052] According to one aspect of the present application, it is characterized in that the first measurement includes measurement of at least a first reference signal of the first candidate cell.

[0053] According to one aspect of the present application, it is characterized in that the first measurement includes UE-based TA measurement of the first candidate cell.

[0054] According to one aspect of the present application, it is characterized in that it includes:

[0055] Sending a first PDCCH order; and receiving a first Preamble as a response to the sending of the first PDCCH order;

[0056] The first PDCCH order indicates the first Preamble; and the first TA command depends on the first Preamble.

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

[0058] Sending a first random access response as a response to receiving the first Preamble;

[0059] The first random access response includes the first TA command.

[0060] According to one aspect of the present application, it is characterized in that the first handover command does not include a field indicating whether the TA of the first candidate cell is valid.

[0061] According to one aspect of the present application, it is characterized by comprising:

[0062] Sending a second RRC signaling;

[0063] The first handover command does not include the domain-dependent second RRC signaling indicating whether the TA of the first candidate cell is valid.

[0064] According to one aspect of the present application, it is characterized in that the first measurement includes time measurement.

[0065] The present application discloses a first node used for wireless communication, characterized in that it includes:

[0066] A first receiver receives a first RRC signaling, a first TA command and a first handover command; wherein the first RRC signaling includes configuration information of a first candidate cell; the first TA command indicates a first TA value of the first candidate cell; the first handover command indicates the first candidate cell, and the first handover command is a MAC CE;

[0067] a first processor, in response to receiving the first handover command, applying the first TA value and performing a RACH-free handover;

[0068] The applying of the first TA value and performing RACH-free switching depends on a first measurement, and the first measurement is related to the TA; the first candidate cell is configured to the cell group to which the first serving cell belongs.

[0069] The present application discloses a second node used for wireless communication, characterized in that it includes:

[0070] A second transmitter sends a first RRC signaling, a first TA command and a first handover command; wherein the first RRC signaling includes configuration information of a first candidate cell; the first TA command indicates a first TA value of the first candidate cell; the first handover command indicates the first candidate cell, and the first handover command is a MAC CE;

[0071] Among them, the recipient of the first RRC signaling, as a response to receiving the first switching command, applies the first TA value and performs RACH-free switching; the application of the first TA value and the performance of RACH-free switching depend on a first measurement, and the first measurement is related to the TA; the first candidate cell is configured to the cell group to which the first serving cell belongs.

[0072] As an embodiment, compared with the traditional solution, this application has the following advantages:

[0073] -. It is helpful to verify the validity of the candidate cell TA obtained in the early uplink synchronization.

[0074] -. It is beneficial to enhance the early uplink synchronization process to be applicable to inter-CU LTM cell switching.

[0075] -. It is conducive to selecting a more accurate uplink timing advance and reducing the waste of wireless resources.

[0076] -. It is conducive to the fallback of LTM cell handover without RACH to LTM cell handover based on RACH.

[0077] -. It is beneficial to improve the robustness of the handover process without random access and reduce the probability of handover failure.

[0078] -. It is helpful to ensure the accuracy and effectiveness of the candidate cell TA used.

[0079] -. It is conducive to reducing changes to existing standards and is easy to implement.

[0080] -. It is beneficial to obtain early timing advance of LTM between CUs.

[0081] -. It is beneficial to the maintenance of candidate cell TA.

[0082] -. It is helpful to reduce the delay of LTM cell switching.

[0083] -.It is helpful to improve the robustness of the LTM process.

[0084] -. It is helpful to reduce signaling interaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0085] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0086] Figure 1 A flowchart of TA validity verification in early uplink synchronization according to an embodiment of the present application is shown;

[0087] Figure 2 A schematic diagram of a network architecture according to an embodiment of the present application is shown;

[0088] Figure 3 A schematic diagram showing an embodiment of a wireless protocol architecture of a user plane and a control plane according to an embodiment of the present application;

[0089] Figure 4 A schematic diagram showing a first communication device and a second communication device according to an embodiment of the present application is shown;

[0090] Figure 5 A wireless signal transmission flow chart according to an embodiment of the present application is shown;

[0091] Figure 6 A schematic diagram showing the relationship between a first measurement and a first reference signal according to an embodiment of the present application;

[0092] Figure 7A schematic diagram showing a relationship between a first measurement and a UE-based TA measurement for a first candidate cell according to an embodiment of the present application;

[0093] Figure 8 A schematic diagram showing a first switching command according to an embodiment of the present application is shown;

[0094] Fig. 9 A schematic diagram showing a second signaling according to an embodiment of the present application is shown;

[0095] Fig.10 A schematic diagram showing that a first measurement includes a time measurement according to an embodiment of the present application;

[0096] Fig.11 A structural block diagram of a processing device used in a first node according to an embodiment of the present application is shown;

[0097] Fig.12 A structural block diagram of a processing device used in a second node according to an embodiment of the present application is shown;

[0098] Fig.13 A schematic diagram of an artificial intelligence processing system according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0099] 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 in the present application and the features in the embodiments can be combined with each other arbitrarily.

[0100] Example 1

[0101] Embodiment 1 illustrates a flowchart of TA validity verification in early uplink synchronization according to an embodiment of the present application, as shown in the attached Figure 1 Attached Figure 1 In the figure, each box represents a step. It should be emphasized that the order of the boxes in the figure does not represent the temporal relationship between the steps represented.

[0102] In Embodiment 1, the first node in the present application receives a first RRC signaling in step 101; receives a first TA command in step 102; receives a first handover command in step 103; and applies the first TA value and performs RACH-free handover in step 104 as a response to the first handover command being received.

[0103] Among them, the first RRC signaling includes configuration information of the first candidate cell; the first TA command indicates the first TA value of the first candidate cell; the first switching command indicates the first candidate cell, and the first switching command is a MAC CE; the application of the first TA value and the execution of RACH-free switching depend on a first measurement, and the first measurement is related to the TA; the first candidate cell is configured to the cell group to which the first service cell belongs.

[0104] As an embodiment, the first RRC message is an RRC reconfiguration message.

[0105] As an embodiment, the first RRC message is an RRCReconfiguration message.

[0106] As an embodiment, the first RRC message is a ReconfigurationWithSync domain.

[0107] As an embodiment, the first RRC message includes an LTM-Config field, and the LTM-Config field includes the target configuration of the first candidate cell.

[0108] As an embodiment, the first RRC message includes an LTM-Candidate field, and the LTM-Candidate field is the target configuration of the first candidate cell.

[0109] As an embodiment, the first RRC signaling is an LTM-Config domain.

[0110] As an embodiment, the configuration information of the first candidate cell includes an LTM-Candidate field.

[0111] As an embodiment, the configuration information of the first candidate cell includes an LTM-CandidateId field.

[0112] As an embodiment, the first candidate cell is an LTM candidate.

[0113] As an embodiment, the first candidate cell is a conditional LTM candidate.

[0114] As an embodiment, the first candidate cell is a conditional switching candidate.

[0115] As an embodiment, the first TA command is a DCI.

[0116] As an embodiment, the first TA command indicates the first candidate cell.

[0117] As an embodiment, the first TA command indicates the first TA value of the first candidate cell.

[0118] As an embodiment, the first TA value depends on the first TA command.

[0119] As an embodiment, the first TA value is indicated by a 6-bit Timing Advance Command field.

[0120] As an embodiment, the first TA value is indicated by a 12-bit Timing Advance Command field.

[0121] As an embodiment, the first TA value depends on the first TA command and the TA value of the first serving cell PTAG.

[0122] As an embodiment, the first TA value is equal to the TA value of the PTAG of the first service cell after being adjusted by the first TA command.

[0123] As an embodiment, the first TA value depends on the first TA command and the TA value of the first candidate cell; the TA value of the first candidate cell is the TA value of the first candidate cell stored by the first node.

[0124] As an embodiment, the first TA value is equal to the TA value of the first candidate cell after being adjusted by the first TA command.

[0125] As an embodiment, the first TA command is a MAC CE other than the first switching command.

[0126] As an embodiment, the first TA command is a Timing Advance Command MAC CE.

[0127] As an embodiment, the first TA command is a field in the first handover command; the first handover command is a MAC CE.

[0128] As an embodiment, the first switching command is a switching command for triggering layer 3 switching.

[0129] As an embodiment, the first switching command is an LTM Cell Switch Command MAC CE.

[0130] As an embodiment, the first switching command is an Intra-CU LTM Cell Switch CommandMAC CE.

[0131] As an embodiment, the first switching command is an Inter-CU LTM Cell Switch CommandMAC CE.

[0132] As an embodiment, the first switching command indicates that the first candidate cell relies on the first RRC signaling.

[0133] As an embodiment, the first serving cell is PCell.

[0134] As an embodiment, the first service cell is a PSCell.

[0135] As an embodiment, the first service cell is a spCell.

[0136] As an embodiment, the second node is a maintaining base station of the first service cell.

[0137] As an embodiment, the first measurement being related to the TA means that the first measurement is related to early TA acquisition.

[0138] As an embodiment, the first measurement being related to the TA means that the first measurement is related to the validity verification of the TA.

[0139] As an embodiment, the first measurement being related to the TA means that the first measurement is related to early TA acquisition and verification of the validity of the TA.

[0140] As an embodiment, the early TA acquisition includes early random access based on PDCCH order.

[0141] As an embodiment, the early TA acquisition includes UE-based TA measurement.

[0142] As an embodiment, the first measurement includes UE-based TA measurement.

[0143] As an embodiment, the first measurement includes RSRP measurement.

[0144] As an embodiment, the first measurement is a layer three measurement.

[0145] As an embodiment, the first measurement is a layer one measurement.

[0146] As an embodiment, the first measurement is configured by the first RRC signaling.

[0147] As an embodiment, the first candidate cell is configured to the cell group to which the first service cell belongs, which means: the first service cell is PCell; the cell group to which the first service cell belongs is MCG; and the first candidate cell is an LTM candidate cell configured for MCG.

[0148] As an embodiment, the first candidate cell is configured to the cell group to which the first service cell belongs, which means: the first service cell is a PSCell; the cell group to which the first service cell belongs is an SCG; and the first candidate cell is an LTM candidate cell configured for the SCG.

[0149] Example 2

[0150] Embodiment 2 illustrates a schematic diagram of a network architecture according to an embodiment of the present application, as shown in the attached Figure 2 Attached Figure 2The network architecture 200 of a 5G NR (New Radio) / LTE (Long-Term Evolution) / LTE-A (Long-Term Evolution Advanced) system is illustrated. The 5G NR / LTE / LTE-A network architecture 200 may be referred to as a 5GS (5G System) / EPS (Evolved Packet System) 200 or some other suitable term. The 5GS / EPS 200 includes at least one of a UE (User Equipment) 201, a RAN (Radio Access Network) 202, a 5GC (5G Core Network) / EPC (Evolved Packet Core) 210, a HSS (Home Subscriber Server) / UDM (Unified Data Management) 220, and an Internet service 230. The 5GS / EPS may be interconnected with other access networks, but these entities / interfaces are not shown for simplicity. As shown, 5GS / EPS provides packet switching services, but it will be readily understood by those skilled in the art that the various concepts presented throughout this application can be extended to networks or other cellular networks that provide circuit switching services. 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, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a TRP (transmitting receiving node) or some other suitable terminology. Node 203 provides an access point to 5GC / EPC 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, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable term.Node 203 is connected to 5GC / EPC210 via an S1 / NG interface. 5GC / EPC210 includes MME (Mobility Management Entity) / AMF (Authentication Management Field) / SMF (Session Management Function) 211, other MME / AMF / SMF214, S-GW (Service Gateway) / UPF (User Plane Function) 212, and P-GW (Packet Data Network Gateway) / UPF213. MME / AMF / SMF211 is a control node that handles signaling between UE201 and 5GC / EPC210. ​​In general, MME / AMF / SMF211 provides bearer and connection management. All user IP (Internet Protocal) packets are transmitted through S-GW / UPF212, which itself is connected to P-GW / UPF213. P-GW provides UE IP address allocation and other functions. P-GW / UPF213 is connected to Internet service 230. Internet service 230 includes operator-corresponding Internet protocol services, which may specifically include Internet, Intranet, IMS (IP Multimedia Subsystem) and packet-switched streaming services.

[0151] As an embodiment, the UE201 corresponds to the first node in the present application.

[0152] As an embodiment, the UE 201 is a user equipment (User Equipment, UE).

[0153] As an embodiment, the UE201 is a base station device (BaseStation, BS).

[0154] As an embodiment, the UE 201 is a relay device.

[0155] As an embodiment, the UE201 is a gateway device.

[0156] As an embodiment, the node 203 corresponds to the second node in the present application.

[0157] As an embodiment, the node 203 is a base station device.

[0158] As an embodiment, the node 203 is a user equipment.

[0159] As an embodiment, the node 203 is a relay device.

[0160] As an embodiment, the node 203 is a gateway device.

[0161] Typically, the UE 201 is a user equipment, and the node 203 is a base station device.

[0162] Typically, the UE 201 is a user equipment, and the node 203 is a user equipment.

[0163] Typically, the UE 201 is a base station device, and the node 203 is a base station device.

[0164] As an embodiment, the user equipment supports transmission of a non-terrestrial network (NTN).

[0165] As an embodiment, the user equipment supports transmission of a terrestrial network (Terrestrial Network).

[0166] As an embodiment, the user equipment supports dual connection (DC) transmission.

[0167] As an embodiment, the user equipment includes an aircraft.

[0168] As an embodiment, the user equipment includes a vehicle-mounted terminal.

[0169] As an embodiment, the user equipment includes a vessel.

[0170] As an embodiment, the user equipment includes an Internet of Things terminal.

[0171] As an embodiment, the user equipment includes a terminal of the industrial Internet of Things.

[0172] As an embodiment, the user equipment includes a device supporting low-latency and high-reliability transmission.

[0173] As an embodiment, the user equipment includes a test device.

[0174] As an embodiment, the user equipment includes a signaling tester.

[0175] As an embodiment, the user equipment includes IAB (Integrated Access and Backhaul)-MT (Mobile Termination).

[0176] As an embodiment, the base station device supports transmission in a non-terrestrial network.

[0177] As an embodiment, the base station device supports transmission of a terrestrial network.

[0178] As an embodiment, the base station equipment includes a base transceiver station (Base Transceiver Station, BTS).

[0179] As an embodiment, the base station device includes a Node B (NodeB, NB).

[0180] As an embodiment, the base station device includes a gNB.

[0181] As an embodiment, the base station device includes an eNB.

[0182] As an embodiment, the base station device includes ng-eNB.

[0183] As an embodiment, the base station device includes en-gNB.

[0184] As an embodiment, the base station device includes a CU (Centralized Unit).

[0185] As an embodiment, the base station device includes a DU (Distributed Unit).

[0186] As an embodiment, the base station device includes a TRP (Transmitter Receiver Point).

[0187] As an embodiment, the base station device includes a macro cellular (Marco Cellular) base station.

[0188] As an embodiment, the base station device includes a micro cell base station.

[0189] As an embodiment, the base station device includes a pico cell (Pico Cell) base station.

[0190] As an embodiment, the base station device includes a home base station (Femtocell).

[0191] As an embodiment, the base station device includes a flying platform device.

[0192] As an embodiment, the base station device includes a satellite device.

[0193] As an embodiment, the base station device includes a testing device.

[0194] As an embodiment, the base station equipment includes a signaling tester.

[0195] As an embodiment, the base station device includes a gateway device.

[0196] As an embodiment, the base station device includes an IAB-node.

[0197] As an embodiment, the base station device includes an IAB-donor.

[0198] As an embodiment, the base station device includes an IAB-donor-CU.

[0199] As an embodiment, the base station device includes an IAB-donor-DU.

[0200] As an embodiment, the base station device includes an IAB-DU.

[0201] As an embodiment, the base station device includes IAB-MT.

[0202] As an embodiment, the relay device includes a relay.

[0203] As an embodiment, the relay device includes an L3 relay.

[0204] As an embodiment, the relay device includes an L2 relay.

[0205] As an embodiment, the relay device includes a router.

[0206] As an embodiment, the relay device includes a switch.

[0207] As an embodiment, the relay device includes a gateway device.

[0208] As an embodiment, the relay device includes user equipment.

[0209] As an embodiment, the relay device includes a base station device.

[0210] Example 3

[0211] Embodiment 3 shows a schematic diagram of an embodiment of a wireless protocol architecture of a user plane and a control plane according to the present application, as shown in the attached Figure 3 shown. Figure 3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane 350 and a control plane 300, Figure 3 The radio protocol architecture for the control plane 300 is shown in 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 as PHY 301 in this article. 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 provides inter-zone mobility support. 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) in a cell. The MAC sublayer 302 is also responsible for HARQ operations. The RRC (Radio Resource Control) sublayer 306 in layer 3 (L3 layer) in the control plane 300 is responsible for obtaining radio resources (i.e., radio bearers) and using RRC signaling to configure the lower layers. The radio protocol architecture of the user plane 350 includes layer 1 (L1 layer) and layer 2 (L2 layer). In the user plane 350, the radio protocol architecture is substantially the same as the corresponding layers and sublayers in the control plane 300 for 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, but the PDCP sublayer 354 also provides header compression for upper layer data packets to reduce radio transmission overhead. The L2 layer 355 in the user plane 350 also includes a SDAP (Service Data Adaptation Protocol) sublayer 356. The SDAP sublayer 356 is responsible for mapping between QoS flows and data radio bearers (DRBs) to support service diversity.

[0212] As an example, Figure 3 The wireless protocol architecture in is applicable to the first node in this application.

[0213] As an example, Figure 3 The wireless protocol architecture in is applicable to the second node in this application.

[0214] As an embodiment, the first RRC signaling in the present application is generated in the RRC306.

[0215] As an embodiment, the second RRC signaling in the present application is generated in the RRC306.

[0216] As an embodiment, the first PDCCH order in the present application is generated by the MAC302 or MAC352.

[0217] As an embodiment, the first PDCCH order in the present application is generated in the PHY301 or PHY351.

[0218] As an embodiment, the first TA command in the present application is generated by the MAC302 or MAC352.

[0219] As an embodiment, the first TA command in the present application is generated in the PHY301 or PHY351.

[0220] As an embodiment, the first Preamble in the present application is generated by the MAC302 or MAC352.

[0221] As an embodiment, the first Preamble in the present application is generated in the PHY301 or PHY351.

[0222] As an embodiment, the first switching command in the present application is generated in the RRC306.

[0223] As an embodiment, the first switching command in the present application is generated by the MAC302 or MAC352.

[0224] As an embodiment, the first switching command in the present application is generated in the PHY301 or PHY351.

[0225] Example 4

[0226] Embodiment 4 shows a schematic diagram of a first communication device and a second communication device according to the present application, as shown in the attached figure. Figure 4 shown. 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.

[0227] 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.

[0228] 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 .

[0229] In transmission from the second communication device 410 to the first communication device 450, at the second communication device 410, upper layer data packets from the core network are provided to the controller / processor 475. The controller / processor 475 implements the functionality of the L2 layer. In 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), M-quadrature amplitude modulation (M-QAM)). The multi-antenna transmit processor 471 performs digital spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming processing 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 domain and / or frequency domain, and then uses an inverse fast Fourier transform (IFFT) to generate a physical channel carrying a time-domain multi-carrier symbol stream. The multi-antenna transmit processor 471 then performs a transmit analog precoding / beamforming operation on the time-domain multi-carrier 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.

[0230] In the transmission from the second communication device 410 to the first communication device 450, at the first communication device 450, each receiver 454 receives a signal through its corresponding antenna 452. Each receiver 454 recovers the information modulated onto the RF carrier and converts the RF stream into a baseband multi-carrier symbol stream and provides it to the receiving processor 456. The receiving processor 456 and the multi-antenna receiving processor 458 implement various signal processing functions of the L1 layer. The multi-antenna receiving processor 458 performs a receiving analog precoding / beamforming operation on the baseband multi-carrier symbol stream from the receiver 454. The receiving processor 456 uses a fast Fourier transform (FFT) to convert the baseband multi-carrier symbol stream after the receiving analog precoding / beamforming operation from the time domain to the frequency domain. In the frequency domain, the physical layer data signal and the reference signal are demultiplexed by the receiving processor 456, wherein the reference signal will be used for channel estimation, and the data signal is recovered after multi-antenna detection in the multi-antenna receiving processor 458 to any spatial stream destined for the first communication device 450. The symbols on each spatial stream are demodulated and recovered in the receiving processor 456, and soft decisions are generated. The receiving 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 codes and data. The memory 460 may be referred to as a computer-readable medium. In the transmission from the second communication device 410 to the second communication device 450, the controller / processor 459 provides multiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover the 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 L3 for L3 processing.

[0231] In the transmission from the first communication device 450 to the second communication device 410, at the first communication device 450, a data source 467 is used to provide upper layer data packets to the controller / processor 459. The data source 467 represents all protocol layers above the L2 layer. Similar to the transmission function 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, and implements L2 layer functions for user plane and control plane. The controller / processor 459 is also responsible for the retransmission of lost packets and signaling to the second communication device 410. The transmit processor 468 performs modulation mapping and channel coding processing, and the multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming processing. Then, the transmit processor 468 modulates the generated spatial stream into a multi-carrier / single-carrier symbol stream, which is then provided to different antennas 452 via the transmitter 454 after analog precoding / beamforming operations in the multi-antenna transmit processor 457. Each transmitter 454 first converts the baseband symbol stream provided by the multi-antenna transmit processor 457 into a radio frequency symbol stream, and then provides it to the antenna 452.

[0232] In the transmission from the first communication device 450 to the second communication device 410, the function at the second communication device 410 is similar to the reception function at the first communication device 450 described in the transmission from the second communication device 410 to the first communication device 450. Each receiver 418 receives a radio frequency signal through its corresponding antenna 420, converts the received radio frequency signal into a baseband signal, and provides the baseband signal to the multi-antenna reception processor 472 and the reception processor 470. The reception processor 470 and the multi-antenna reception processor 472 jointly implement the functions of the L1 layer. The controller / processor 475 implements the L2 layer functions. The controller / processor 475 can be associated with a memory 476 storing program codes and data. The memory 476 can be referred to as a computer-readable medium. In the transmission from the first communication device 450 to the second communication device 410, the controller / processor 475 provides multiplexing between transport and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover the upper layer data packets from the UE 450. Upper layer packets from controller / processor 475 may be provided to the core network.

[0233] 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: receives a first RRC signaling, a first TA command and a first switching command; wherein the first RRC signaling includes configuration information of a first candidate cell; the first TA command indicates a first TA value of the first candidate cell; the first switching command indicates the first candidate cell, and the first switching command is a MAC CE; as a response to the first switching command being received, applying the first TA value and performing RACH-free switching; the application of the first TA value and performing RACH-free switching depend on a first measurement, and the first measurement is related to the TA; the first candidate cell is configured to the cell group to which the first service cell belongs.

[0234] As an embodiment, the first communication device 450 includes: a memory storing a computer-readable instruction program, the computer-readable instruction program generates actions when executed by at least one processor, the actions including: receiving a first RRC signaling, a first TA command and a first switching command; wherein the first RRC signaling includes configuration information of a first candidate cell; the first TA command indicates a first TA value of the first candidate cell; the first switching command indicates the first candidate cell, and the first switching command is a MAC CE; in response to the first switching command being received, applying the first TA value and performing RACH-free switching; the application of the first TA value and performing RACH-free switching depend on a first measurement, and the first measurement is related to the TA; the first candidate cell is configured to the cell group to which the first service cell belongs.

[0235] As an embodiment, the second communication device 410 includes: at least one processor and at least one memory, the at least one memory includes computer program code; the at least one memory and the computer program code are configured to be used with the at least one processor. The second communication device 410 at least: sends a first RRC signaling, a first TA command and a first handover command; wherein the first RRC signaling includes configuration information of a first candidate cell; the first TA command indicates a first TA value of the first candidate cell; the first handover command indicates the first candidate cell, and the first handover command is a MAC CE; the receiver of the first RRC signaling, as a response to the first handover command being received, applies the first TA value and performs a RACH-free handover; the application of the first TA value and the performance of the RACH-free handover depend on a first measurement, and the first measurement is related to the TA; the first candidate cell is configured to the cell group to which the first serving cell belongs.

[0236] As an embodiment, the second communication device 410 includes: a memory storing a computer-readable instruction program, the computer-readable instruction program generates actions when executed by at least one processor, the actions including: sending a first RRC signaling, a first TA command and a first switching command; wherein the first RRC signaling includes configuration information of a first candidate cell; the first TA command indicates a first TA value of the first candidate cell; the first switching command indicates the first candidate cell, and the first switching command is a MAC CE; the receiver of the first RRC signaling, as a response to the first switching command being received, applies the first TA value and performs RACH-free switching; the application of the first TA value and the performance of RACH-free switching depend on a first measurement, and the first measurement is related to the TA; the first candidate cell is configured to the cell group to which the first service cell belongs.

[0237] 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 the first RRC signaling.

[0238] 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 the first RRC signaling.

[0239] 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 the second RRC signaling.

[0240] 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 the second RRC signaling.

[0241] 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 the first PDCCH order.

[0242] 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 the first PDCCH order.

[0243] 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 the first TA command.

[0244] 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 the first TA command.

[0245] 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 the first switching command.

[0246] 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 the first switching command.

[0247] 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 the first Preamble.

[0248] 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 first Preamble.

[0249] As an embodiment, the first communication device 450 corresponds to the first node in this application.

[0250] As an embodiment, the second communication device 410 corresponds to the second node in this application.

[0251] As an embodiment, the second communication device 410 corresponds to the third node in this application.

[0252] As an embodiment, the first communication device 450 is a user equipment.

[0253] As an embodiment, the first communication device 450 is a base station device.

[0254] As an embodiment, the first communication device 450 is a relay device.

[0255] As an embodiment, the second communication device 410 is a user equipment.

[0256] As an embodiment, the second communication device 410 is a base station device.

[0257] As an embodiment, the second communication device 410 is a relay device.

[0258] Example 5

[0259] Embodiment 5 illustrates a wireless signal transmission flow chart according to an embodiment of the present application, as shown in the attached Figure 5 It is particularly noted that the order in this example does not limit the signal transmission order and implementation order in this application.

[0260] for First node U01:

[0261] In step S5101, receiving a first RRC signaling;

[0262] In step S5102, receiving a second RRC signaling;

[0263] In step S5103, a first PDCCH order is received;

[0264] In step S5104, a first Preamble is sent as a response to the first PDCCH order being received;

[0265] In step S5105, as a response to the first Preamble being sent, a first random access response is monitored;

[0266] In step S5106, receiving a first TA command;

[0267] In step S5107, a first switching command is received;

[0268] In step S5108, in response to the first handover command being received, applying the first TA value and performing a RACH-free handover;

[0269] for Second node N02:

[0270] In step S5201, a first RRC signaling is sent;

[0271] In step S5202, a second RRC signaling is sent;

[0272] In step S5203, a first PDCCH order is sent;

[0273] In step S5204, a first TA command is sent;

[0274] In step S5205, a first switching command is sent;

[0275] for The third node N03:

[0276] In step S5301, a first Preamble is received;

[0277] In embodiment 5, the first RRC signaling includes configuration information of a first candidate cell; the first TA command indicates a first TA value of the first candidate cell; the first handover command indicates the first candidate cell, and the first handover command is a MAC CE; the application of the first TA value and the execution of RACH-free handover depend on a first measurement, and the first measurement is related to the TA; the first candidate cell is configured to the cell group to which the first serving cell belongs; the first PDCCH order indicates the first Preamble; the first TA command depends on the first Preamble; and the first random access response includes the first TA command.

[0278] As an embodiment, the first node U01 and the second node N02 are connected wirelessly.

[0279] As an embodiment, the first node U01 and the second node N02 are connected via a wire.

[0280] As an embodiment, the first node U01 and the second node N02 are connected via a Uu port.

[0281] As an embodiment, the first node U01 and the second node N02 are connected via an IAB port.

[0282] As an embodiment, the first node U01 and the second node N02 are connected via a PC5 interface.

[0283] As an embodiment, the first node U01 and the third node N03 are connected wirelessly.

[0284] As an embodiment, the first node U01 and the third node N03 are connected via a wire.

[0285] As an embodiment, the first node U01 and the third node N03 are connected via a Uu port.

[0286] As an embodiment, the first node U01 and the third node N03 are connected via an IAB port.

[0287] As an embodiment, the first node U01 and the third node N03 are connected via a PC5 interface.

[0288] As an embodiment, the second node U02 and the third node N03 are connected wirelessly.

[0289] As an embodiment, the second node U02 and the third node N03 are connected via a wire.

[0290] As an embodiment, the second node U02 and the third node N03 are connected via a Uu port.

[0291] As an embodiment, the second node U02 and the third node N03 are connected via an IAB port.

[0292] As an embodiment, the second node U02 and the third node N03 are connected via a PC5 interface.

[0293] As an embodiment, the second node U02 and the third node N03 are connected via an Xn interface.

[0294] As an embodiment, the second node U02 and the third node N03 are connected via an X2 interface.

[0295] As an embodiment, the second node U02 is the third node N03.

[0296] As an embodiment, the second node U02 is not the third node N03.

[0297] As an embodiment, the dashed box F5.1 is optional.

[0298] As an embodiment, the dashed box F5.1 exists.

[0299] As an embodiment, the dotted box F5.1 does not exist.

[0300] As an embodiment, the dashed box F5.2 is optional.

[0301] As an embodiment, the dashed box F5.2 exists.

[0302] As an embodiment, the dotted box F5.2 does not exist.

[0303] As an embodiment, the dashed box F5.3 is optional.

[0304] As an embodiment, the dashed box F5.3 exists.

[0305] As an embodiment, the dotted box F5.3 does not exist.

[0306] As an embodiment, when the dotted box F5.2 does not exist, the dotted box F5.1 does not exist.

[0307] As an embodiment, when the dotted box F5.2 does not exist, the dotted box F5.3 does not exist.

[0308] As an embodiment, when the dotted box F5.2 exists or is optional, the dotted box F5.1 exists or is optional.

[0309] As an embodiment, when the dotted box F5.2 exists or is optional, the dotted box F5.3 exists or is optional.

[0310] As an embodiment, whether the dotted box F5.2 exists depends on the first RRC signaling.

[0311] As an embodiment, whether the dotted box F5.2 exists depends on the configuration information of the first candidate cell.

[0312] As an embodiment, whether the dotted box F5.2 exists depends on the second RRC message.

[0313] As an embodiment, in response to the first Preamble being sent, the random access procedure is considered to be successfully completed.

[0314] As an embodiment, the first PDCCH order is a DCI format 1_0.

[0315] As an embodiment, the first PDCCH order indicates the first candidate cell.

[0316] As an embodiment, the first PDCCH order indicates the uplink carrier of the first Preamble.

[0317] As an embodiment, the first PDCCH order indicates the RA Preamble index of the first Preamble.

[0318] As an embodiment, the first PDCCH order indicates the SS / PBCH index associated with the first Preamble.

[0319] As an embodiment, the first PDCCH order indicates the PRACH MASKindex of the first Preamble.

[0320] As an embodiment, the first TA command being dependent on the first Preamble means that sending of the first Preamble belongs to early uplink synchronization, and the first TA command is an uplink timing advance of the first candidate cell obtained by the first candidate cell based on reception of the first Preamble in early uplink synchronization.

[0321] As an embodiment, the first Preamble includes a msg1repetition operation; as a response to receiving the first PDCCH order, the first Preamble is sent, and the msg1repetition operation is performed according to relevant configuration.

[0322] As a sub-embodiment of the above embodiment, the relevant configuration is the BWP-Uplink domain of the first candidate cell configured in the first RRC signaling.

[0323] As an embodiment, the first measurement being related to the TA means that the first measurement is related to TA verification.

[0324] As an embodiment: the TA verification refers to verifying the validity of the first TA value, and the verification of the validity of the first TA value depends on the first measurement.

[0325] As an embodiment, the first PDCCH order indicates the spatial filtering parameters of the uplink transmission of the first Preamble.

[0326] As a sub-embodiment of the above embodiment, the first PDCCH order includes an SS / PBCH index field associated with the first Preamble, and the SS / PBCH index field indicates a spatial filtering parameter of uplink transmission of the first Preamble.

[0327] As a sub-embodiment of the above embodiment, the first PDCCH order includes a TCI state ID field, and the TCI state ID field indicates a spatial filtering parameter of the uplink transmission of the first Preamble.

[0328] As an embodiment, the first measurement includes performing RSRP measurement according to the spatial filtering parameters of the first Preamble.

[0329] As an embodiment, the first measurement includes performing RSRP measurement according to the first reference signal; the first path loss reference signal depends on the first PDCCH order.

[0330] As a sub-embodiment of the above embodiment, the first reference signal is the SSB indicated by the SS / PBCH index field associated with the first Preamble in the first PDCCH order.

[0331] As a sub-embodiment of the above embodiment, the first reference signal is a reference signal indicated by the TCI state ID field in the first PDCCH order.

[0332] As an embodiment, the first random access response is monitored on the first candidate cell.

[0333] As an embodiment, the first random access response is monitored on the first serving cell.

[0334] As an embodiment, the first random access response is a MAC RAR.

[0335] As an embodiment, the first random access response is a fallbackRAR.

[0336] As an embodiment, the first random access response is a MAC CE.

[0337] As an embodiment, the first switching command includes a Timing Advance Command field, and the Timing Advance Command field is set to FFF.

[0338] As an embodiment, the first random access response is a MAC RAR or a fallback RAR.

[0339] As an embodiment, the subheader of the first random access response includes the RAPID of the first Preamble.

[0340] As an embodiment, the first random access response is scheduled by a first DCI.

[0341] As an embodiment, the first DCI is a format 1_0DCI.

[0342] As an embodiment, the first DCI is scrambled by the RA-RNTI corresponding to the sending parameters of the first Preamble.

[0343] As an embodiment, the first DCI is scrambled by the MsgB-RNTI corresponding to the sending parameters of the first Preamble.

[0344] As an embodiment, the first DCI is scrambled by the C-RNTI of the first node in the first serving cell.

[0345] As a sub-embodiment of the above embodiment, the first candidate cell is indicated in the first random access response.

[0346] As an embodiment, the first random access response includes the first TA command.

[0347] As an embodiment, in response to successfully receiving the first TA command, a third timer is started or restarted.

[0348] As an embodiment, the third timer is a timeAlignmentTimer.

[0349] As an embodiment, the third timer maintains the validity of the first candidate cell TA.

[0350] As an embodiment, the first TA command indicates the TA of the first candidate cell.

[0351] As an embodiment, in response to the third timer being running, the TA of the first candidate cell is considered valid.

[0352] As an embodiment, in response to the third timer not being running, the TA of the first candidate cell is considered invalid.

[0353] As an embodiment, in response to successfully receiving the first TA command, the TA of the first candidate cell in the TA command is stored.

[0354] As a sub-embodiment of the above embodiment, the storing of the TA command means: the TA command carries the N_TA value for the first candidate cell PTAG, and the N_TA value carried in the TA command is stored.

[0355] As a sub-embodiment of the above embodiment, the storing of the TA command means: the TA command carries an adjustment amount for the N_TA value of the first candidate cell PTAG, and the adjustment amount is stored.

[0356] As a sub-embodiment of the above embodiment, the storing of the TA command means: the TA command carries the adjustment amount of the N_TA value of the first candidate cell PTAG, and the N_TA value adjusted by the TA command is stored.

[0357] As a sub-embodiment of the above embodiment, the valid bits in the TA command are stored.

[0358] As an embodiment, in response to the third timer being running, applying the stored TA of the first candidate cell is allowed.

[0359] As an embodiment, in response to the third timer not being running, applying the stored TA of the first candidate cell is not allowed.

[0360] As an embodiment, a timer is not started in response to successfully receiving the first TA command.

[0361] As an embodiment, a second timer is started in response to the first Preamble being sent.

[0362] As an embodiment, in response to the second timer being running, the first random access response is listened for.

[0363] As an embodiment, in response to the second timer being running, the first DCI is monitored.

[0364] As an embodiment, the second timer is a ra-ResponseWindow.

[0365] As an embodiment, the second timer is stopped in response to successfully receiving and decoding the first random access response.

[0366] As an embodiment, in response to the second timer timing out, stop listening to the first random access response.

[0367] As an embodiment, in response to the second timer timing out, stop monitoring the first DCI.

[0368] Example 6

[0369] Embodiment 6 illustrates a schematic diagram of the relationship between the first measurement and the first reference signal according to an embodiment of the present application, as shown in the attached figure. Figure 6 shown.

[0370] In Embodiment 6, the first measurement includes measurement of at least a first reference signal of the first candidate cell.

[0371] As an embodiment, the applying of the first TA value and performing RACH-free switching relying on a first measurement includes: the applying of the first TA value and performing RACH-free switching relying on measurement of at least a first reference signal of the first candidate cell.

[0372] As an embodiment, the application of the first TA value and the performance of RACH-free switching depend on the measurement of at least the first reference signal of the first candidate cell, including: when the measurement result of at least the first reference signal of the first candidate cell is not worse than a second threshold, the first TA value is applied and the RACH-free switching is performed.

[0373] As an embodiment, the application of the first TA value and the performance of RACH-free switching rely on the measurement of at least the first reference signal of the first candidate cell, including: when the change in the measurement result of at least the first reference signal of the first candidate cell does not exceed a second threshold, the first TA value is applied and the RACH-free switching is performed.

[0374] As an embodiment, the change in the measurement result of at least the first reference signal of the first candidate cell refers to: the change in the measurement result of at least the first reference signal of the first candidate cell from the time when the first Preamble is sent to the time when the first switching command is received.

[0375] As an embodiment, the change in the measurement result of at least the first reference signal of the first candidate cell refers to: the change in the measurement result of at least the first reference signal of the first candidate cell during the time from receiving the first PDCCH order to receiving the first switching command.

[0376] As an embodiment, the change in the measurement result of at least the first reference signal of the first candidate cell refers to: the change in the measurement result of at least the first reference signal of the first candidate cell from a first moment to a second moment.

[0377] As a sub-embodiment of the above embodiment, the first moment is the moment when the first PDCCH order is successfully received.

[0378] As a sub-embodiment of the above embodiment, the second moment is the moment when the first switching command is successfully received.

[0379] As a sub-embodiment of the above embodiment, the first moment and the second moment are configured by the first RRC signaling.

[0380] As an embodiment, the at least first reference signal is a reference signal.

[0381] As an embodiment, the at least first reference signal is a plurality of reference signals.

[0382] As an embodiment, the at least first reference signal is one or more reference signals.

[0383] As an embodiment, the first reference signal is a path loss reference.

[0384] As an embodiment, the first reference signal is a reference signal indicated by the first PDCCH order.

[0385] As an embodiment, the first reference signal is SSB.

[0386] As an embodiment, the first reference signal is CSI-RS.

[0387] As an embodiment, the first reference signal is SSB or CSI-RS.

[0388] As an embodiment, the first reference signal is a reference signal associated with a first TCI.

[0389] As a sub-embodiment of the above embodiment, the first TCI is indicated by a Candidate Cell TCIStates Activation / Deactivation MAC CE.

[0390] As an embodiment, the measurement result is an L1 measurement result.

[0391] As an embodiment, the measurement result is SS-RSRP.

[0392] As an embodiment, the measurement result is CSI-RSRP.

[0393] As an embodiment, the second threshold is preconfigured.

[0394] As an embodiment, the second threshold is configured by the first RRC signaling.

[0395] As an embodiment, the second threshold is configured by the configuration information of the first candidate cell in the first RRC signaling.

[0396] As an embodiment, the second threshold is rach-less-LTM-RSRP-ChangeThreshold.

[0397] As an embodiment, the name of the second threshold at least includes RSRP-ChangeThreshold.

[0398] As an embodiment, the name of the second threshold at least includes LTM.

[0399] As an embodiment, the name of the second threshold at least contains rach-less.

[0400] As an embodiment, the second threshold is predefined.

[0401] As an embodiment, the second threshold is a default threshold.

[0402] As an embodiment, the second threshold is fixed.

[0403] Example 7

[0404] Embodiment 7 illustrates a schematic diagram of the relationship between the first measurement and the UE-based TA measurement for the first candidate cell according to an embodiment of the present application, as shown in the attached figure. Figure 7 shown.

[0405] In Embodiment 7, the first measurement includes UE-based TA measurement of the first candidate cell.

[0406] As an embodiment, the applying the first TA value and performing the RACH-free handover dependent first measurement includes: the applying the first TA value and performing the RACH-free handover dependent UE-based TA measurement for the first candidate cell.

[0407] As an embodiment, the application of the first TA value and the performance of RACH-free switching rely on the UE-based TA measurement for the first candidate cell, including: when the first TA value is better than the second TA value, applying the first TA value and performing RACH-free switching; the second TA value is measured by the UE-based TA measurement for the first candidate cell.

[0408] As an embodiment, the application of the first TA value and the performance of RACH-free switching depend on the UE-based TA measurement for the first candidate cell, including: when the difference between the first TA value and the second TA value does not exceed a first threshold, the first TA value is applied and the RACH-free switching is performed; the second TA value is measured by the UE-based TA measurement for the first candidate cell.

[0409] As an embodiment, in response to receiving the first signaling, the UE-based TA measurement for the first candidate cell is started.

[0410] As an embodiment, in response to receiving the first signaling, the UE-based TA measurement for the first candidate cell is allowed to be performed.

[0411] As an embodiment, the first signaling is a MAC CE.

[0412] As an embodiment, the first signaling is a DCI.

[0413] As an embodiment, the first signaling is a Candidate Cell TCI StatesActivation / Deactivation MAC CE.

[0414] As an embodiment, the first signaling activates or deactivates the TCI state of the first candidate cell; and the first measurement depends on the activated TCI state of the first candidate cell.

[0415] As an embodiment, the UE-based TA measurement is based on the activated TCI state of the first candidate cell.

[0416] As an embodiment, the UE-based TA measurement is based on at least a second reference signal; the second reference signal is a reference signal associated with the activated TCI state of the first candidate cell.

[0417] As an embodiment, the second reference signal is SSB.

[0418] As an embodiment, the second reference signal is a CSI-RS.

[0419] As an embodiment, the UE-based TA measurement is based on at least a third reference signal; the third reference signal is a reference signal of the first serving cell.

[0420] As an embodiment, the third reference signal is SSB.

[0421] As an embodiment, the third reference signal is CSI-RS.

[0422] As an embodiment, the UE-based TA measurement refers to: measuring the timing advance by the UE.

[0423] As an embodiment, the UE-based TA measurement refers to: determining the timing advance based on UE measurement.

[0424] As an embodiment, the UE-based TA measurement includes: a process in which the UE derives a timing advance applied to a first uplink transmission to the first candidate cell.

[0425] As an embodiment, the UE-based TA measurement includes: the UE performs the second measurement process.

[0426] As an embodiment, the first measurement includes the second measurement process.

[0427] As an embodiment, the second measurement process is L3 measurement.

[0428] As an embodiment, the second measurement process is L1 measurement.

[0429] As an embodiment, the second measurement process includes L3 measurement.

[0430] As an embodiment, the second measurement process includes L1 measurement.

[0431] As an embodiment, the second measurement process is RSTD measurement.

[0432] As an embodiment, the second measurement process is based on SSB measurement.

[0433] As an embodiment, the second measurement process is based on PRS measurement.

[0434] As an embodiment, the second measurement process refers to: measuring the downlink reception timing difference between the first serving cell and the first candidate cell.

[0435] As an embodiment, the UE-based TA measurement includes: the UE performs a first derivation process.

[0436] As an embodiment, the first derivation process refers to: a process of deriving the uplink timing advance of the first candidate cell based on the downlink reception timing difference between the first service cell and the first candidate cell and the effective uplink timing of the first candidate cell, as well as the downlink transmission timing difference between the first service cell and the first candidate cell.

[0437] As an embodiment, the UE-based TA measurement includes: performing the first derivation process.

[0438] As a sub-embodiment of the above embodiment, the first derivation process is: the uplink timing of the first candidate cell = the uplink timing of the first serving cell + 2×downlink receiving timing difference.

[0439] As a sub-embodiment of the above embodiment, the first derivation process is: the uplink timing of the first candidate cell = the uplink timing of the first serving cell - 2×downlink receiving timing difference.

[0440] As a sub-embodiment of the above embodiment, the first derivation process is: the uplink timing of the first candidate cell = the uplink timing of the first serving cell + 2×(downlink receiving timing difference - downlink sending timing difference).

[0441] As a sub-embodiment of the above embodiment, the first derivation process is: the uplink timing of the first candidate cell = the uplink timing of the first serving cell - 2×(downlink receiving timing difference - downlink sending timing difference).

[0442] As a sub-embodiment of the above embodiment, the first derivation process is: the uplink timing of the first candidate cell = the uplink timing of the first serving cell + 2×(downlink receiving timing difference + downlink sending timing difference).

[0443] As a sub-embodiment of the above embodiment, the first derivation process is: the uplink timing of the first candidate cell = the uplink timing of the first serving cell - 2×(downlink receiving timing difference + downlink sending timing difference).

[0444] As a sub-embodiment of the above embodiment, the first time interval is a downlink receiving and sending timing difference.

[0445] As a sub-embodiment of the above embodiment, the downlink reception timing difference refers to: a downlink reception timing difference of the first candidate cell relative to the first serving cell.

[0446] As a sub-embodiment of the above embodiment, the downlink receiving and sending timing difference refers to: a downlink sending timing difference of the first candidate cell relative to the first serving cell.

[0447] As a sub-embodiment of the above embodiment, the downlink reception timing difference refers to: a downlink reception timing difference between the first serving cell and the first candidate cell.

[0448] As a sub-embodiment of the above embodiment, the downlink receiving and sending timing difference refers to: a downlink sending timing difference between the first serving cell and the first candidate cell.

[0449] As an embodiment, the UE-based TA measurement is implemented based on the UE.

[0450] As an embodiment, the UE-based TA measurement is based on the 3GPP protocol.

[0451] As an embodiment, the UE-based TA measurement is partially based on UE implementation and partially based on 3GPP protocol.

[0452] As an embodiment, the second measurement process is implemented based on UE.

[0453] As an embodiment, the first derivation process is based on the 3GPP protocol.

[0454] As an embodiment, the second measurement process is based on the 3GPP protocol.

[0455] As an embodiment, the first derivation process is implemented based on UE.

[0456] As an embodiment, the first measurement being related to the TA means that the first measurement is related to the verification of the second TA value.

[0457] As an embodiment, the verification of the second TA value refers to verifying the result of the UE-based TA measurement.

[0458] As an embodiment, the first measurement includes UE-based TA measurement; the first measurement includes verification of the result of the UE-based TA measurement.

[0459] As an embodiment, in response to successfully measuring the second TA value, verification of the second TA value is performed.

[0460] As an embodiment, when the measurement result of at least the second reference signal for the first candidate cell is not worse than a third threshold, the second TA value is considered valid; otherwise, the second TA value is considered invalid.

[0461] As an embodiment, when the measurement result of at least the third reference signal of the first candidate cell is not worse than a fourth threshold, the second TA value is considered valid; otherwise, the second TA value is considered invalid.

[0462] As an embodiment, when the measurement result of at least the second reference signal for the first candidate cell is not worse than a third threshold, and when at least the measurement result of the third reference signal is not worse than a fourth threshold, the second TA value is considered valid; otherwise, the second TA value is considered invalid.

[0463] As an embodiment, when the change of the measurement result of at least the second reference signal for the first candidate cell does not exceed a third threshold, the second TA value is considered valid; otherwise, the second TA value is considered invalid.

[0464] As an embodiment, when the change of the measurement result of at least the third reference signal for the first candidate cell does not exceed a fourth threshold, the second TA value is considered valid; otherwise, the second TA value is considered invalid.

[0465] As an embodiment, when the change in the measurement result of at least the second reference signal for the first candidate cell does not exceed a third threshold, and the change in the measurement result of at least the third reference signal does not exceed a fourth threshold, the second TA value is considered valid; otherwise, the second TA value is considered invalid.

[0466] As an embodiment, the third threshold is preconfigured.

[0467] As an embodiment, the third threshold is configured by the first RRC signaling.

[0468] As an embodiment, the third threshold is configured by the configuration information of the first candidate cell in the first RRC signaling.

[0469] As an embodiment, the third threshold is predefined.

[0470] As an embodiment, the third threshold is a default.

[0471] As an embodiment, the third threshold is fixed.

[0472] As an embodiment, the fourth threshold is preconfigured.

[0473] As an embodiment, the fourth threshold is configured by the first RRC signaling.

[0474] As an embodiment, the fourth threshold is configured by the configuration information of the first candidate cell in the first RRC signaling.

[0475] As an embodiment, the fourth threshold is predefined.

[0476] As an embodiment, the fourth threshold is a default.

[0477] As an embodiment, the fourth threshold is fixed.

[0478] Example 8

[0479] Embodiment 8 illustrates a schematic diagram of a first switching command according to an embodiment of the present application, as shown in the attached figure. Figure 8 shown.

[0480] In Embodiment 8, the first handover command does not include a field indicating whether the TA of the first candidate cell is valid.

[0481] As an embodiment, the first handover command does not include a field for indicating a TA.

[0482] As an embodiment, the first switching command indicates the first candidate cell.

[0483] As an embodiment, the first switching command includes a Target Configuration ID field; the Target Configuration ID indicates the LTM cell switching configuration of the first candidate cell.

[0484] As an embodiment, the first switching command includes a MAC subheader, and the eLCID in the MAC subheader is set to 219.

[0485] As a sub-embodiment of the above embodiment, the first handover command is an LTM Cell Switch Command MAC CE and the first handover command does not include a field indicating whether the TA of the first candidate cell is valid.

[0486] As a sub-embodiment of the above embodiment, the first handover command includes a Timing Advance Command field, and the Timing Advance Command field does not indicate whether the TA of the first candidate cell is valid.

[0487] As a sub-embodiment of the above embodiment, the first handover command includes a Timing Advance Command field, and the Timing Advance Command field indicates a TA value of a serving cell of the first node.

[0488] As a sub-embodiment of the above embodiment, the second TA value depends on the TA value of the first serving cell of the first node.

[0489] As a sub-embodiment of the above embodiment, the first handover command includes a Timing Advance Command field, and the Timing Advance Command field indicates a TA value of the first candidate cell.

[0490] As a sub-embodiment of the above embodiment, the first TA value depends on the TA value of the first candidate cell of the first node.

[0491] As an embodiment, the first switching command includes a MAC subheader, and the eLCID in the MAC subheader is not set to 219.

[0492] As a sub-embodiment of the above embodiment, the first handover command is not a LTM Cell Switch Command MAC CE and the first handover command does not include a field indicating whether the TA of the first candidate cell is valid.

[0493] As a sub-embodiment of the above embodiment, the first switching command includes a TargetConfiguration ID field.

[0494] As a sub-embodiment of the above embodiment, as a response to receiving the first handover command, the LTM candidate cell configuration indicated by the Target Configuration ID field is applied.

[0495] As an embodiment, the first handover command does not include a field indicating whether the TA of the first candidate cell is valid, which means that the first handover command does not include a TimingAdvance Command field indicating whether the TA of the first candidate cell is valid.

[0496] As an embodiment, the first switching command includes at least one UL TCI state ID.

[0497] As an embodiment, the at least one UL TCI state ID is for LTM switching for the first candidate cell.

[0498] As a sub-embodiment of the above embodiment, the at least one UL TCI state ID is for RACH-based LTM cell switching; the first node selects one of the at least one UL TCI state ID for sending the Preamble in the first candidate cell in the RACH-based LTM cell switching.

[0499] As a sub-embodiment of the above embodiment, the at least one UL TCI state ID is for LTM cell switching based on RACH-free; the first node selects one of the at least one UL TCI state IDs for sending the first uplink transmission on the first candidate cell in the LTM cell switching based on RACH-free.

[0500] As an embodiment, the first switching command includes a first field; the first field indicates the number of the at least one UL TCI state ID.

[0501] As an embodiment, the first handover command does not include a field indicating whether the TA of the first candidate cell is valid, which means that whether the TA of the first candidate cell is valid does not depend on the first handover command.

[0502] As an embodiment, the first switching command does not include a field indicating whether the TA of the first candidate cell is valid, which means that whether the TA of the first candidate cell is valid is determined by the UE implementation of the first node.

[0503] As an embodiment, the first switching command does not include a field indicating whether the TA of the first candidate cell is valid, which means that whether the TA of the first candidate cell is valid is determined by the first node.

[0504] As an embodiment, the TA of the first candidate cell includes the first TA value and the second TA value.

[0505] As an embodiment, whether the TA of the first candidate cell is valid refers to the judgment of the validity of the first TA value or the second TA value.

[0506] As an embodiment, whether the TA of the first candidate cell is valid refers to the selection of the first TA value or the second TA value.

[0507] As an embodiment, as a response to successfully receiving the first switching command, it is determined whether the TA of the first candidate cell is valid.

[0508] As an embodiment, if the first timer and the third timer are both running, whether the TA of the first candidate cell is valid depends on the first measurement.

[0509] As a sub-embodiment of the above embodiment, in response to successfully receiving the first switching command, the RSRP change of the first reference signal is compared with the RSRP change of the third reference signal.

[0510] As a sub-embodiment of the above embodiment, if the first reference signal is the third reference signal, or the RSRP change of the first reference signal is equal to the RSRP change of the third reference signal, the first TA value is considered invalid, the second TA value is valid, and the second TA value is applied.

[0511] As a sub-embodiment of the above embodiment, if the first reference signal is the third reference signal, or the RSRP change of the first reference signal is equal to the RSRP change of the third reference signal, the second TA value is considered invalid, the first TA value is valid, and the first TA value is applied.

[0512] As a sub-embodiment of the above embodiment, if the RSRP change of the first reference signal is smaller than the RSRP change of the third reference signal, the second TA value is considered invalid, the first TA value is valid, and the first TA value is applied.

[0513] As a sub-embodiment of the above embodiment, if the RSRP change rate of the first reference signal is less than the RSRP change rate of the third reference signal, the second TA value is considered invalid, the first TA value is valid, and the first TA value is applied.

[0514] As a sub-embodiment of the above embodiment, if the RSRP change of the first reference signal is greater than the RSRP change of the third reference signal, the first TA value is considered invalid, the second TA value is valid, and the second TA value is applied.

[0515] As a sub-embodiment of the above embodiment, if the RSRP change rate of the first reference signal is greater than the RSRP change rate of the third reference signal, the first TA value is considered invalid, the second TA value is valid, and the second TA value is applied.

[0516] As a sub-embodiment of the above embodiment, the RSRP change of the first reference signal refers to: a change in the RSRP measurement result of the first reference signal for the first candidate cell during the time from when the first Preamble is sent to when the first switching command is received.

[0517] As a sub-embodiment of the above embodiment, the RSRP change rate of the first reference signal refers to: the change rate of the RSRP measurement result of the first reference signal for the first candidate cell from the time when the first Preamble is sent to the time when the first switching command is received.

[0518] As a sub-embodiment of the above embodiment, the RSRP change of the first reference signal refers to: a change in the RSRP measurement result of the first reference signal for the first candidate cell during the period from receiving the first PDCCH order to receiving the first switching command.

[0519] As a sub-embodiment of the above embodiment, the RSRP change rate of the first reference signal refers to: a change rate of the RSRP measurement result of the first reference signal for the first candidate cell from receiving the first PDCCH order to receiving the first switching command.

[0520] As a sub-embodiment of the above embodiment, the RSRP change of the third reference signal refers to: a change in the RSRP measurement result of the third reference signal for the first candidate cell during the time from receiving the first signaling to receiving the first switching command.

[0521] As a sub-embodiment of the above embodiment, the RSRP change rate of the third reference signal refers to: the change rate of the RSRP measurement result of the third reference signal for the first candidate cell from the time when the first signaling is received to the time when the first switching command is received.

[0522] As a sub-embodiment of the above embodiment, the RSRP change of the third reference signal refers to: a change in the RSRP measurement result of the third reference signal for the first candidate cell from the third moment to the time when the first switching command is received.

[0523] As a sub-embodiment of the above embodiment, the RSRP change rate of the third reference signal refers to: a change rate of the RSRP measurement result of the third reference signal for the first candidate cell from the third moment to the time when the first switching command is received.

[0524] As a sub-embodiment of the above embodiment, the third moment is the moment of starting the UE-based TA measurement.

[0525] As a sub-embodiment of the above embodiment, the third moment is the moment when the UE-based TA measurement is completed.

[0526] As a sub-embodiment of the above embodiment, the third moment is the moment when the second TA value is successfully measured.

[0527] As a sub-embodiment of the above embodiment, the third moment is determined by UE implementation.

[0528] As an embodiment, as a response to successfully receiving the first switching command, if the first timer is running and the third timer is not running, the second TA value is considered invalid, the first TA value is valid, and the first TA value is applied.

[0529] As an embodiment, as a response to successfully receiving the first switching command, if the third timer is running and the first timer is not running, the first TA value is considered invalid, the second TA value is valid, and the second TA value is applied.

[0530] As an embodiment, in response to successfully receiving the first switching command, if no valid TA value is available, fall back to random access-based cell switching.

[0531] As an embodiment, the determination of whether the first TA value is valid depends on the output of the artificial intelligence module.

[0532] As an embodiment, the determination of whether the second TA value is valid depends on the output of the artificial intelligence module.

[0533] As an embodiment, when the first TA value and the second TA value exist at the same time, the judgment on the selection or application of the first TA value or the second TA value depends on the output of the artificial intelligence module.

[0534] Example 9

[0535] Embodiment 9 illustrates a schematic diagram of the second signaling according to an embodiment of the present application, as shown in the attached Fig. 9 shown.

[0536] In Embodiment 9, the first node in the present application receives a second RRC signaling in step 901; the first handover command does not include a domain-dependent second RRC signaling indicating whether the TA of the first candidate cell is valid.

[0537] As an embodiment, the second RRC signaling explicitly indicates that the first handover command does not include a field indicating whether the TA of the first candidate cell is valid.

[0538] As an embodiment, the second RRC signaling implicitly indicates that the first handover command does not include a field indicating whether the TA of the first candidate cell is valid.

[0539] As an embodiment, the second RRC signaling configures a first time-frequency resource set, and the first time-frequency resource set is used to monitor a first random access response.

[0540] As an embodiment, the second RRC signaling indicates receiving a random access response during an early uplink synchronization process based on a PDCCH order.

[0541] As a sub-embodiment of the above embodiment, the second RRC signaling indicates reception parameters of a random access response.

[0542] As a sub-embodiment of the above embodiment, the receiving parameter of the random access response includes ra-ResponseWindow.

[0543] As a sub-embodiment of the above embodiment, the reception parameters of the random access response include the first time-frequency resource set.

[0544] As a sub-embodiment of the above embodiment, the first time-frequency resource set is the time-frequency resources of the first candidate cell.

[0545] As a sub-embodiment of the above embodiment, the first time-frequency resource set includes a CSS of the first candidate cell.

[0546] As a sub-embodiment of the above embodiment, the first time-frequency resource set includes a Typee1-PDCCH CSS of the first candidate cell.

[0547] As a sub-embodiment of the above embodiment, the receiving parameters of the random access response include a SearchSpace IE.

[0548] As a sub-embodiment of the above embodiment, the reception parameters of the random access response include a ra-SearchSpace field, and the ra-Search field is used to indicate a SearchSpaceID used for the random access process.

[0549] As a sub-embodiment of the above embodiment, the receiving parameters of the random access response include a ControlResourceSetZero IE.

[0550] As a sub-embodiment of the above embodiment, the receiving parameters of the random access response include a ControlResourceSet IE.

[0551] As a sub-embodiment of the above embodiment, the receiving parameters of the random access response include a SearchSpaceZero IE.

[0552] As a sub-embodiment of the above embodiment, the second RRC signaling is a field, the one field includes only one code point, and the only one code point indicates receiving a random access response in an early uplink synchronization process based on a PDCCH order.

[0553] As a sub-embodiment of the above embodiment, the second RRC signaling is a domain, the one domain includes only one code point, and the only one code point indicates that the first candidate cell and the first serving cell belong to different CUs.

[0554] As a sub-embodiment of the above embodiment, only one code point is true.

[0555] As a sub-embodiment of the above embodiment, the only one code point is setup.

[0556] As an embodiment, the second RRC signaling configures whether the first node receives a random access response on the first candidate cell during early uplink synchronization.

[0557] As an embodiment, when the second RRC signaling includes relevant configuration for receiving a random access response from the first candidate cell, the first node is instructed to receive a random access response on the first candidate cell.

[0558] As an embodiment, when the second RRC signaling does not include relevant configuration for receiving a random access response from the first candidate cell, the first node is instructed not to receive a random access response on the first candidate cell.

[0559] As an embodiment, the second RRC signaling indicates the value of the first timer.

[0560] As an embodiment, the second RRC signaling is a field in the first RRC signaling.

[0561] As an embodiment, the second RRC signaling is a field in the configuration information of the first candidate cell in the first RRC signaling.

[0562] As an embodiment, when the first RRC signaling does not include the second RRC signaling, the first switching command includes a TA indicating the first candidate cell; when the first RRC signaling includes the second RRC signaling, the first switching command does not include a TA indicating the first candidate cell.

[0563] As an embodiment, when the first RRC signaling does not include the second RRC signaling, the configuration information indicating the first candidate cell is the configuration information for intra-CU LTM cell switching (Intra-CU LTM Cell Switch); when the first RRC signaling includes the second RRC signaling, the configuration information indicating the first candidate cell is the configuration information for inter-CU LTM cell switching (Inter-CU LTM Cell Switch).

[0564] As an embodiment, the configuration of the first candidate cell indicated in the second RRC signaling is intra-CU LTM cell switching or inter-CU cell switching.

[0565] Example 10

[0566] Embodiment 10 illustrates a schematic diagram of a first measurement including time measurement according to an embodiment of the present application, as shown in the attached Fig.10 shown.

[0567] In embodiment 10, the first measurement includes a time measurement.

[0568] As an embodiment, the time measurement means that a first timer is running.

[0569] As an embodiment, the time measurement refers to: maintaining the first timer.

[0570] As an embodiment, the first timer may be replaced by a time window.

[0571] As an embodiment, the first timer is a timer.

[0572] As an embodiment, the applying of the first TA value and performing RACH-free switching depends on the first measurement, including: the applying of the first TA value and performing RACH-free switching depends on the first timer being running.

[0573] As an embodiment, the applying of the first TA value and performing RACH-free switching depends on the first timer being running, which means: when the first timer is running, the first TA value is applied and the RACH-free switching is performed.

[0574] As an embodiment, the first timer is started in response to the first TA command being received.

[0575] As an embodiment, the first timer is started in response to the first Preamble being sent.

[0576] As an embodiment, the applying of the first TA value and performing RACH-free switching relies on measurement, and the applying of the first TA value and performing RACH-free switching relies on a first timer being running.

[0577] As an embodiment, in response to the first timer not being running, applying the first TA value is not allowed.

[0578] As an embodiment, in response to the first timer not being running, the first TA value is deemed invalid.

[0579] As an embodiment, the non-operation refers to expiration or timeout.

[0580] As an embodiment, the first Preamble is sent in response to the first timer timing out.

[0581] As an embodiment, the first TA command includes a field indicating the value of the first timer.

[0582] As a sub-embodiment of the above embodiment, the first TA command is a MAC CE, the MAC CE includes a Timing Advance Command field, and the Timing Advance Command field indicates the first TA value.

[0583] As a sub-embodiment of the above embodiment, the first TA command is a MAC RAR, the MAC RAR includes a Timing Advance Command field, and the Timing Advance Command field indicates the first TA value.

[0584] As a sub-embodiment of the above embodiment, the first TA command is a fallbackRAR, the fallbackRAR includes a Timing Advance Command field, and the Timing Advance Command field indicates the first TA value.

[0585] As a sub-embodiment of the above embodiment, the one field is at least one bit after the one Timing AdvanceCommand field.

[0586] As a sub-embodiment of the above embodiment, the one field is at least one bit in the UL Grant field after the one Timing AdvanceCommand field.

[0587] As a sub-embodiment of the above embodiment, whether the domain exists depends on the first RRC signaling.

[0588] As a sub-embodiment of the above embodiment, the size of the one domain depends on the first RRC signaling.

[0589] As a sub-embodiment of the above embodiment, the value of the one field indicates the size of the first timer.

[0590] As an embodiment, the first measurement includes time measurement, which means that the first measurement includes the UE-based TA measurement for the first candidate cell.

[0591] As an embodiment, the first measurement includes the second measurement process.

[0592] As an embodiment, the first measurement includes a downlink synchronization operation with the first candidate cell.

[0593] As an embodiment, the first measurement includes measurement of the downlink timing of the first candidate cell.

[0594] As an embodiment, the time measurement includes a downlink synchronization process.

[0595] As an embodiment, the time measurement includes a downlink synchronization process with the first serving cell.

[0596] As an embodiment, the time measurement includes a downlink synchronization process with the first candidate cell.

[0597] As an embodiment, the time measurement includes detecting the PSS.

[0598] As an embodiment, the time measurement includes detecting SSS.

[0599] As an embodiment, the time measurement includes detecting a DMRS in an SSB.

[0600] As an embodiment, the time measurement includes decoding SIB1 of the first candidate cell.

[0601] Embodiment 11

[0602] Embodiment 11 illustrates a structural block diagram of a processing device used in a first node according to an embodiment of the present application; Fig.11 As shown in the attached Fig.11 In the embodiment, the first processor 1100 in the first node includes a first transmitter 1101 and a first receiver 1102.

[0603] The first receiver 1102 receives a first RRC signaling, a first TA command and a first handover command; wherein the first RRC signaling includes configuration information of a first candidate cell; the first TA command indicates a first TA value of the first candidate cell; the first handover command indicates the first candidate cell, and the first handover command is a MAC CE;

[0604] The first processor 1100, in response to receiving the first handover command, applies the first TA value and performs a RACH-free handover;

[0605] In embodiment 11, applying the first TA value and performing RACH-free switching relies on a first measurement, and the first measurement is related to the TA; the first candidate cell is configured to the cell group to which the first serving cell belongs.

[0606] As an embodiment, the first measurement includes measurement of at least a first reference signal of the first candidate cell.

[0607] As an embodiment, the first measurement includes UE-based TA measurement for the first candidate cell.

[0608] As an embodiment, the first receiver 1102 receives a first PDCCH order; the first transmitter sends a first Preamble in response to the first PDCCH order being received; the first PDCCH order indicates the first Preamble; and the first TA command depends on the first Preamble.

[0609] As an embodiment, the first receiver 1102, in response to the first Preamble being sent, monitors a first random access response; the first random access response includes the first TA command.

[0610] As an embodiment, the first handover command does not include a field indicating whether the TA of the first candidate cell is valid.

[0611] As an embodiment, the first receiver 1102 receives a second RRC signaling; the first switching command does not include a domain-dependent second RRC signaling indicating whether the TA of the first candidate cell is valid.

[0612] As an embodiment, the first measurement comprises a time measurement.

[0613] As an embodiment, the first receiver 1102 includes the attached Figure 4 At least one of the antenna 452 or the receiver 454 or the multi-antenna receive processor 458 or the receive processor 456 or the controller / processor 459 or the memory 460 or the data source 467.

[0614] As an embodiment, the first receiver 1102 includes the attached Figure 4 At least an antenna 452 and a receiver 454.

[0615] As an embodiment, the first transmitter 1101 includes the attached Figure 4At least one of the antenna 452 or the transmitter 454 or the multi-antenna transmit processor 457 or the transmit processor 468 or the controller / processor 459 or the memory 460 or the data source 467.

[0616] As an embodiment, the first transmitter 1101 includes the attached Figure 4 At least antenna 452 and transmitter 454.

[0617] Example 12

[0618] Embodiment 12 illustrates a structural block diagram of a processing device used in a second node according to an embodiment of the present application; Fig.12 As shown in the attached Fig.12 In the embodiment, the second processor 1200 in the second node includes a second transmitter 1201 and a second receiver 1202.

[0619] The second transmitter 1201 sends a first RRC signaling, a first TA command and a first handover command; wherein the first RRC signaling includes configuration information of a first candidate cell; the first TA command indicates a first TA value of the first candidate cell; the first handover command indicates the first candidate cell, and the first handover command is a MAC CE;

[0620] In embodiment 12, the recipient of the first RRC signaling, in response to receiving the first switching command, applies the first TA value and performs RACH-free switching; the application of the first TA value and the performance of RACH-free switching depend on a first measurement, and the first measurement is related to the TA; the first candidate cell is configured to the cell group to which the first serving cell belongs.

[0621] As an embodiment, the first measurement includes measurement of at least a first reference signal of the first candidate cell.

[0622] As an embodiment, the first measurement includes UE-based TA measurement for the first candidate cell.

[0623] As an embodiment, the second transmitter 1201 sends a first PDCCH order; the second receiver 1202 receives a first Preamble as a response to the first PDCCH order being sent; the first PDCCH order indicates the first Preamble; and the first TA command depends on the first Preamble.

[0624] As an embodiment, the second transmitter 1201 sends a first random access response as a response to reception of the first Preamble; the first random access response includes the first TA command.

[0625] As an embodiment, the first handover command does not include a field indicating whether the TA of the first candidate cell is valid.

[0626] As an embodiment, the second transmitter 1201 sends a second RRC signaling; the first switching command does not include a domain-dependent second RRC signaling indicating whether the TA of the first candidate cell is valid.

[0627] As an embodiment, the first measurement comprises a time measurement.

[0628] As an embodiment, the second transmitter 1201 includes the attached Figure 4 At least one of the antenna 420 or the transmitter 418 or the multi-antenna transmit processor 471 or the transmit processor 416 or the controller / processor 475 or the memory 476.

[0629] As an embodiment, the second transmitter 1201 includes the attached Figure 4 At least antenna 420 and transmitter 418.

[0630] As an embodiment, the second receiver 1202 includes the attached Figure 4 At least one of the antenna 420 or the receiver 418 or the multi-antenna reception processor 472 or the reception processor 470 or the controller / processor 475 or the memory 476.

[0631] As an embodiment, the second receiver 1202 includes the attached Figure 4 At least an antenna 420 and a receiver 418.

[0632] Embodiment 13

[0633] Embodiment 13 illustrates a schematic diagram of an artificial intelligence processing system according to an embodiment of the present application, as shown in the attached Fig.13 Attached Fig.13 It includes a first module, a second module, a third module, a fourth module and a fifth module.

[0634] In Example 13, the first module sends a first data set to the second module, the first module sends a second data set to the third module, the first module sends a third data set to the fifth module, the fifth module sends a first type of parameter group to the second module, the fifth module sends a second type of parameter group to the third module, the fifth module sends a third type of parameter group to the fourth module, the second module sends a fourth type of parameter group to the fourth module, and the fourth module sends a fifth type of parameter group to the third module.

[0635] As an embodiment, the first module, the second module, the third module, the fourth module and the fifth module all belong to the first node.

[0636] The above method avoids air interface signaling interaction and shortens transmission delay.

[0637] As an embodiment, any one of the first module, the second module, the third module, the fourth module and the fifth module does not belong to the first node.

[0638] The above method reduces the hardware complexity of the first node.

[0639] As an embodiment, at least the first module among the first module, the second module, the third module, the fourth module and the fifth module belongs to the first node; and at least one module among the first module, the second module, the third module, the fourth module and the fifth module does not belong to the first node.

[0640] The above method balances the hardware complexity and transmission delay of the first node.

[0641] As an embodiment, the first module is used for data collection.

[0642] As an embodiment, the first module is responsible for data collection.

[0643] As an embodiment, the first module has a data collection function.

[0644] As an embodiment, the second module is used for model training (Model Training).

[0645] As an embodiment, the second module is responsible for model training.

[0646] As an embodiment, the second module has a model training function.

[0647] As an embodiment, the second module performs AI / ML model training.

[0648] As an embodiment, the second module performs validation.

[0649] As an embodiment, the second module performs testing.

[0650] As an embodiment, the second module generates model performance metrics.

[0651] As an embodiment, the second module is responsible for data preparation.

[0652] As an embodiment, the data preparation includes at least one of data pre-processing, cleaning, formatting, or transformation.

[0653] As an embodiment, the third module is used for inference.

[0654] As an embodiment, the third module has a reasoning function.

[0655] As an embodiment, the third module is responsible for reasoning.

[0656] As an embodiment, the fourth module is used for model storage (Model Storage).

[0657] As an embodiment, the fourth module has a model storage (Model Storage) function.

[0658] As an embodiment, the fourth module is responsible for storing the trained model.

[0659] As an embodiment, the fourth module is responsible for storing the trained model that can be used to perform reasoning processing.

[0660] As an embodiment, the fifth module is used for management.

[0661] As an embodiment, the fifth module is responsible for management.

[0662] As an embodiment, the fifth module has a management function.

[0663] As an embodiment, the first data set is training data (Training Data).

[0664] As an embodiment, the second data set is inference data.

[0665] As an embodiment, the third data set is monitoring data.

[0666] As an embodiment, the first parameter group includes monitoring output.

[0667] As an embodiment, the second type of parameter group includes management instructions.

[0668] As an embodiment, the second type of parameter group is used for fine-tuning operation of the inference function.

[0669] As an embodiment, the second parameter group includes an identifier of the model.

[0670] As an embodiment, the second type of parameter group is used to select a model.

[0671] As an embodiment, the second type of parameter group is used for switching models.

[0672] As an embodiment, the second type of parameter group is used to activate / deactivate the model.

[0673] As an embodiment, the second type of parameter group is used to fall back from AI-ML operation to non-AI-ML operation.

[0674] As an embodiment, the third type of parameter group includes a model transfer request (Model Transfer Request).

[0675] As an embodiment, the third parameter group includes a model delivery request (Model DeliveryRequest).

[0676] As an embodiment, the fourth parameter group includes a trained model (Trained Model).

[0677] As an embodiment, the fourth parameter group includes an updated model (Updated Model).

[0678] As an embodiment, the fourth type of parameter group indicates the identification of the model.

[0679] As an embodiment, the fifth parameter group includes model transfer.

[0680] As an embodiment, the fifth parameter group includes model delivery.

[0681] As an embodiment, the fifth type of parameter group indicates the identification of the model.

[0682] As an embodiment, the first type of output includes a monitoring output.

[0683] As an embodiment, the first type of output exists.

[0684] As an embodiment, the first type of output does not exist.

[0685] As an embodiment, the second type of output includes inference output.

[0686] As an embodiment, the second type of output is used by the fifth module to monitor the performance of the AI / ML model.

[0687] As an embodiment, the second type of output is used by the fifth module to monitor the performance of the AI / ML function.

[0688] As an embodiment, the second type of output exists.

[0689] As an embodiment, the second type of output does not exist.

[0690] As an embodiment, the artificial intelligence processing system generates or assists in generating a judgment on whether the first TA value is valid or a judgment on whether the second TA value is valid or a selection between the first TA value and the second TA value.

[0691] As an embodiment, the fifth module generates or assists in generating a judgment on whether the first TA value is valid or a judgment on whether the second TA value is valid or a selection between the first TA value and the second TA value.

[0692] As an embodiment, the third module generates or assists in generating a judgment on whether the first TA value is valid or a judgment on whether the second TA value is valid or a selection between the first TA value and the second TA value.

[0693] As an embodiment, the second type of output includes a determination of whether the first TA value is valid or a determination of whether the second TA value is valid or a selection between the first TA value and the second TA value.

[0694] As an embodiment, at least one of the first data set or the second data set includes the first RRC signaling.

[0695] As an embodiment, at least one of the first data set or the second data set includes the second RRC signaling.

[0696] As an embodiment, at least one of the first data set or the second data set includes the configuration information of the first candidate cell.

[0697] As an embodiment, at least one of the first data set or the second data set includes a measurement result of the first measurement.

[0698] As an embodiment, at least one of the first data set or the second data set includes the first TA command.

[0699] As an embodiment, at least one of the first data set or the second data set includes the first switching command.

[0700] As an embodiment, at least one of the first data set, the second data set, or the third data set includes the first RRC signaling.

[0701] As an embodiment, at least one of the first data set, the second data set, or the third data set includes the second RRC signaling.

[0702] As an embodiment, at least one of the first data set, the second data set, or the third data set includes the configuration information of the first candidate cell.

[0703] As an embodiment, at least one of the first data set, the second data set, or the third data set includes a measurement result of the first measurement.

[0704] As an embodiment, at least one of the first data set, the second data set, or the third data set includes the first TA command.

[0705] As an embodiment, at least one of the first data set, the second data set, or the third data set includes the first switching command.

[0706] As an embodiment, the embodiment 13 is only used to illustrate that the present application can be used in an artificial intelligence processing system. The embodiment does not limit the application of the present application to a non-artificial intelligence processing system, and the embodiment does not limit the application of the present application to other types of artificial intelligence processing systems to obtain and attach Fig.13The artificial intelligence processing system shown has comparable effects.

[0707] A person of ordinary skill in the art can understand that all or part of the steps in the above method can be completed by instructing the 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 function module, and the present application is not limited to any specific form of software and hardware combination. The user equipment, terminal and UE in the present 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, Machine Type Communication) terminals, eMTC (enhanced MTC, 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.

[0708] The above is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A first node used for wireless communication, characterized in that: include: A first receiver receives a first RRC signaling, a first TA command and a first handover command; wherein the first RRC signaling includes configuration information of a first candidate cell; the first TA command indicates a first TA value of the first candidate cell; the first handover command indicates the first candidate cell, and the first handover command is a MAC CE; a first processor, in response to receiving the first handover command, applying the first TA value and performing a RACH-free handover; The applying of the first TA value and performing RACH-free switching depends on a first measurement, and the first measurement is related to the TA; the first candidate cell is configured to the cell group to which the first serving cell belongs.

2. The first node according to claim 1, characterized in that: The first measurement includes measurement of at least a first reference signal for the first candidate cell.

3. The first node according to claim 1 or 2, characterized in that: The first measurement includes UE-based TA measurement for the first candidate cell.

4. The first node according to any one of claims 1 to 3, characterized in that: include: The first receiver receives a first PDCCH order; The first transmitter sends a first Preamble in response to the first PDCCH order being received; The first PDCCH order indicates the first Preamble; and the first TA command depends on the first Preamble.

5. The first node according to claim 4, characterized in that: include: The first receiver, in response to the first Preamble being sent, monitors a first random access response; The first random access response includes the first TA command.

6. The first node according to any one of claims 1 to 5, characterized in that: The first handover command does not include a field indicating whether the TA of the first candidate cell is valid.

7. The first node according to claim 6, characterized in that: include: The first receiver receives a second RRC signaling; The first handover command does not include the domain-dependent second RRC signaling indicating whether the TA of the first candidate cell is valid.

8. The first node according to any one of claims 1 to 7, characterized in that: The first measurement comprises a time measurement.

9. A second node used for wireless communication, characterized in that: include: A second transmitter sends a first RRC signaling, a first TA command and a first handover command; wherein the first RRC signaling includes configuration information of a first candidate cell; the first TA command indicates a first TA value of the first candidate cell; the first handover command indicates the first candidate cell, and the first handover command is a MAC CE; Among them, the recipient of the first RRC signaling, as a response to receiving the first switching command, applies the first TA value and performs RACH-free switching; the application of the first TA value and the performance of RACH-free switching depend on a first measurement, and the first measurement is related to the TA; the first candidate cell is configured to the cell group to which the first serving cell belongs.

10. A method in a first node for wireless communication, characterized in that: include: receiving a first RRC signaling, a first TA command and a first handover command; wherein the first RRC signaling includes configuration information of a first candidate cell; the first TA command indicates a first TA value of the first candidate cell; the first handover command indicates the first candidate cell, and the first handover command is a MAC CE; in response to the first handover command being received, applying the first TA value and performing a RACH-free handover; The applying of the first TA value and performing RACH-free switching depends on a first measurement, and the first measurement is related to the TA; the first candidate cell is configured to the cell group to which the first serving cell belongs.

11. A method in a second node for wireless communication, characterized in that: include: Sending a first RRC signaling, a first TA command and a first handover command; wherein the first RRC signaling includes configuration information of a first candidate cell; the first TA command indicates a first TA value of the first candidate cell; the first handover command indicates the first candidate cell, and the first handover command is a MAC CE; Among them, the recipient of the first RRC signaling, as a response to receiving the first switching command, applies the first TA value and performs RACH-free switching; the application of the first TA value and the performance of RACH-free switching depend on a first measurement, and the first measurement is related to the TA; the first candidate cell is configured to the cell group to which the first serving cell belongs.

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