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 DCI on the first cell; performing a first random access procedure on a second cell as a response to the first DCI being received; the first DCI is used for indicating the second cell, and the first DCI is used for indicating preamble retransmission; the execution of the first random access process comprises the steps of considering that the first DCI indicates preamble initial transmission and maintaining a first counter. According to the method provided by the invention, the optimization of the random access process is facilitated, and the over-high value of PREAMBLEPOWERRAMPINGCOUNTER is avoided, so that the influence on the preamble transmitting power is reduced.

Description

Technical Field

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

[0002] With the continuous development of wireless communication, the requirements for mobility, transmission delay, and system capacity are getting higher and higher. The 3GPP RAN (Radio Access Network) #94e meeting decided to study L1 (Layer 1) / L2 (Layer 2) triggered mobility (LTM) in the "Further NR mobility enhancements" work item (WI).

[0003] To achieve RACH-less transmission, LTM supports an early uplink synchronization process. Before receiving the LTM Cell Switch Command, a UE (User Equipment) can receive a PDCCH order for an LTM candidate cell from the serving cell to trigger a random access process on the LTM candidate cell.

[0004] In the existing protocol, for the random access procedure for advancing the uplink synchronization procedure, the UE calculates the PREAMBLE_RECEIVED_TARGET_POWER for preamble transmission according to the PREAMBLE_POWER_RAMPING_COUNTER, and the PREAMBLE_POWER_RAMPING_COUNTER is related to the indication of the network. If this random access procedure is initiated by a PDCCH (Physical downlink control channel) order for an LTM candidate cell indicating preamble initial transmission, or if this random access procedure is initiated by a PDCCH order for an LTM candidate cell and the PDCCH order is different from the LTM candidate cell indicated by the PDCCH order indicating the previous preamble transmission for the LTM candidate cell and this PDCCH order indicates preamble re - transmission, set the PREAMBLE_POWER_RAMPING_COUNTER to 1; if this random access procedure is initiated by a PDCCH order for an LTM candidate cell indicating preamble re - transmission, and the SSB (Synchronization Signal Block, or SS (Synchronization Signal) / PBCH (Physical Broadcast Channel) block) indicated by this PDCCH order is the same as the SSB corresponding to the previous preamble transmission and the LTM candidate cell indicated by this PDCCH order is the same as the previous preamble transmission, the PREAMBLE_POWER_RAMPING_COUNTER is incremented by 1. Summary of the Invention

[0005] The inventor found through research that for the early uplink synchronization of LTM, it is unreasonable to determine the value of PREAMBLE_POWER_RAMPING_COUNTER according to the existing protocol. In particular, if there are other random access procedures executed between the previous preamble transmission in an LTM candidate cell and the PDCCH order indicating the initiation of a random access procedure in this LTM candidate cell, and even if PREAMBLE_POWER_RAMPING_COUNTER is incremented by 1 or set to 1 during other random access procedures, it will cause the PREAMBLE_RECEIVED_TARGET_POWER of the preamble calculated according to PREAMBLE_POWER_RAMPING_COUNTER to be inaccurate, thereby affecting the UE or network performance. Therefore, it is necessary to enhance the random access procedure.

[0006] In view of the above problems, the present application provides a solution. In the above problem description, the NR system is taken as an example, and the present application is also applicable to scenarios such as LTE (Long-Term Evolution), LTE-A (Long-Term Evolution Advanced), future 5G-A, or 6G systems, achieving technical effects similar to those of the NR system; further, although the present application gives specific implementation manners for PRACH transmission, the present application can also be used in scenarios such as PUCCH transmission, achieving technical effects similar to those of PRACH transmission. Further, adopting a unified design solution for different scenarios also helps to reduce hardware complexity and cost. Further, although the present application gives specific implementation manners for LTM, the present application can also be used in scenarios such as CHO or CPC, achieving technical effects similar to those of CHO or CPC. Further, although the present application gives specific implementation manners for the intra-CU scenario, the present application can also be used in scenarios such as the inter-CU scenario, achieving technical effects similar to those of the intra-CU. Further, although the original intention of the present application is for the Uu air interface, the present application can also be used in the PC5 interface, achieving technical effects similar to those of the Uu air interface. Further, although the original intention of the present application is for the terminal and base station scenario, the present application is also equally applicable to the V2X (Vehicle-to-Everything) scenario, the communication scenarios between the terminal and the relay, and between the relay and the base station, achieving technical effects similar to those in the terminal and base station scenario. Further, although the original intention of the present application is for the terminal and base station scenario, the present application is also equally applicable to the communication scenario of IAB (Integrated Access and Backhaul), achieving technical effects similar to those in the terminal and base station scenario. Further, although the original intention of the present application is for the terrestrial network (TN) scenario, the present application is also equally applicable to the communication scenario of the non-terrestrial network (NTN), achieving technical effects similar to those in the TN scenario. In addition, adopting a unified solution for different scenarios also helps to reduce hardware complexity and cost.

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

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

[0009] As an embodiment, the definitions of the terms in this application are referred to the definitions in the future 5G-A or 6G specification protocols of 3GPP.

[0010] It should be noted that, without conflict, the embodiments and the features in the embodiments in any node of this application can be applied to any other node. Without conflict, the embodiments and the features in the embodiments of this application can be combined with each other arbitrarily.

[0011] This application discloses a method in a first node used for wireless communication, which is characterized by including:

[0012] Receiving a first DCI (Downlink Control Information) on a first cell; in response to the reception of the first DCI, performing a first random access procedure on a second cell; wherein, the first DCI indicates the second cell, and the first DCI indicates preamble retransmission;

[0013] Wherein, performing the first random access procedure includes considering that the first DCI indicates preamble initial transmission and maintaining a first counter.

[0014] As an embodiment, the problems to be solved by this application include: how to determine the value of PREAMBLE_POWER_RAMPING_COUNTER.

[0015] As an embodiment, the problems to be solved by this application include: how to avoid unreasonable values of PREAMBLE_POWER_RAMPING_COUNTER.

[0016] As an embodiment, the problems to be solved by this application include: how to enhance the random access procedure.

[0017] As an embodiment, the problems to be solved by this application include: how to perform early uplink synchronization for LTM.

[0018] As an embodiment, the characteristics of the above method include: performing the first random access procedure includes considering that the first DCI indicates preamble initial transmission, thereby solving the above problems.

[0019] As an embodiment, the advantages of the above method include: optimizing the value of PREAMBLE_POWER_RAMPING_COUNTER.

[0020] As an embodiment, the advantages of the above method include: optimizing the random access procedure.

[0021] As an embodiment, the advantages of the above method include: optimizing early uplink synchronization for LTM.

[0022] According to one aspect of the present application, it is characterized in that it includes:

[0023] Receiving a second DCI on the first cell;

[0024] The last preamble transmission is on the second cell and the last preamble transmission is initiated by the second DCI.

[0025] As an embodiment, the above method can avoid increasing the value of the first counter during the random access preamble transmission process.

[0026] As an embodiment, when the last preamble transmission is on the second cell and the last preamble transmission is initiated by the second DCI, the above method optimizes the value of PREAMBLE_POWER_RAMPING_COUNTER.

[0027] As an embodiment, when the last preamble transmission is on the second cell and the last preamble transmission is initiated by the second DCI, the above method optimizes the random access process.

[0028] As an embodiment, when the last preamble transmission is on the second cell and the last preamble transmission is initiated by the second DCI, the above method optimizes the LTM early uplink synchronization.

[0029] According to one aspect of the present application, it is characterized in that it includes:

[0030] The last preamble transmission is on the second cell and the last preamble transmission is initiated by the first node.

[0031] As an embodiment, the above method is beneficial to compatible with the early uplink synchronization of conditional LTM.

[0032] As an embodiment, the above method is beneficial to compatible with the early uplink synchronization of inter-CU LTM.

[0033] According to one aspect of the present application, it is characterized in that maintaining the first counter does not include setting the first counter to 1; maintaining the first counter not including setting the first counter to 1 depends on the last preamble transmission being on the second cell and the last preamble transmission being initiated by the second DCI.

[0034] As an embodiment, in the above method, during the first random access process, it is considered that the first DCI indicates the preamble initial transmission, and setting the first counter to 1 is not executed.

[0035] As an embodiment, the above method can avoid increasing the value of the first counter during the random access preamble transmission process.

[0036] As an embodiment, while the above method avoids increasing the value of the first counter during the random access preamble transmission process, it also avoids setting the first counter to 1.

[0037] As an embodiment, the above method avoids the value of the first counter being too high or too low.

[0038] As an embodiment, the above method balances the value of the first counter.

[0039] According to one aspect of the present application, it is characterized in that maintaining the first counter includes setting the first counter to 1; maintaining the first counter including setting the first counter to 1 depends on the consideration that the first DCI indicates the preamble initial transmission.

[0040] As an embodiment, in the above method, during the first random access process, it is considered that the first DCI indicates the preamble initial transmission, and the first counter is set to 1.

[0041] As an embodiment, the above method avoids the value of the first counter being too high by the consideration that the first DCI indicates the preamble initial transmission.

[0042] According to one aspect of the present application, it is characterized in that maintaining the first counter does not include incrementing the first counter by 1; maintaining the first counter not including incrementing the first counter by 1 depends on the consideration that the first DCI indicates the preamble initial transmission.

[0043] As an embodiment, in the above method, during the first random access process, it is considered that the first DCI indicates the preamble initial transmission, and the first counter is not incremented by 1.

[0044] As an embodiment, the above method avoids the value of the first counter being too high by the consideration that the first DCI indicates the preamble initial transmission.

[0045] According to one aspect of the present application, it is characterized in that the consideration that the first DCI indicates the preamble initial transmission depends on the second random access process; the second random access process is before the first random access process.

[0046] As an embodiment, the above method avoids the influence of the second random access procedure on the value of the first counter.

[0047] According to one aspect of the present application, it is characterized in that it is considered that the first DCI indicating preamble initial transmission depends on the first counter being operated in the second random access procedure.

[0048] As an embodiment, the above method avoids the influence of the first counter being operated in the second random access procedure on the value of the first counter.

[0049] According to one aspect of the present application, it is characterized in that it is considered that the first DCI indicating preamble initial transmission depends on the preamble being cancelled from transmission in the second random access procedure.

[0050] As an embodiment, the above method avoids the influence of the preamble being cancelled from transmission in the second random access procedure on the value of the first counter.

[0051] The present application discloses a method in a second node for use in wireless communication, characterized by including:

[0052] Transmitting a first DCI on a first cell; wherein, in response to the reception of the first DCI, the receiver of the first DCI performs a first random access procedure on a second cell; the first DCI indicates the second cell, and the first DCI indicates preamble retransmission;

[0053] Wherein, performing the first random access procedure includes considering that the first DCI indicates preamble initial transmission and maintaining a first counter.

[0054] According to one aspect of the present application, it is characterized by including:

[0055] The second transmitter transmits a second DCI on the first cell;

[0056] Wherein, the previous preamble transmission is on the second cell and the previous preamble transmission is initiated by the second DCI.

[0057] According to one aspect of the present application, it is characterized in that maintaining the first counter does not include setting the first counter to 1; maintaining the first counter does not include setting the first counter to 1 depending on the previous preamble transmission being on the second cell and the previous preamble transmission being initiated by the second DCI.

[0058] According to one aspect of the present application, it is characterized in that the maintaining the first counter includes setting the first counter to 1; the maintaining the first counter includes setting the first counter to 1 depending on the belief that the first DCI indicates a preamble initial transmission.

[0059] According to one aspect of the present application, it is characterized in that the maintaining the first counter does not include incrementing the first counter by 1; the maintaining the first counter does not include incrementing the first counter by 1 depending on the belief that the first DCI indicates a preamble initial transmission.

[0060] According to one aspect of the present application, it is characterized in that the belief that the first DCI indicates a preamble initial transmission depends on a second random access procedure; the second random access procedure is before the first random access procedure.

[0061] According to one aspect of the present application, it is characterized in that the belief that the first DCI indicates a preamble initial transmission depends on the first counter being operated during the second random access procedure.

[0062] According to one aspect of the present application, it is characterized in that the belief that the first DCI indicates a preamble initial transmission depends on the preamble being cancelled from being transmitted during the second random access procedure.

[0063] The present application discloses a first node for use in wireless communication, characterized by including:

[0064] A first processor, receiving a first DCI on a first cell; in response to the first DCI being received, performing a first random access procedure on a second cell; wherein, the first DCI indicates the second cell, and the first DCI indicates a preamble retransmission;

[0065] Wherein, the performing the first random access procedure includes believing that the first DCI indicates a preamble initial transmission and maintaining a first counter.

[0066] The present application discloses a second node for use in wireless communication, characterized by including:

[0067] A second transmitter, transmitting a first DCI on a first cell; wherein, in response to the first DCI being received, the receiver of the first DCI performs a first random access procedure on a second cell; the first DCI indicates the second cell, and the first DCI indicates a preamble retransmission;

[0068] Wherein, the performing the first random access procedure includes believing that the first DCI indicates a preamble initial transmission and maintaining a first counter.

[0069] The present application discloses a method in a first node for use in wireless communication, characterized by including:

[0070] Receiving a first DCI on a first cell; in response to the reception of the first DCI, performing a first random access procedure on a second cell; wherein, the first DCI indicates the second cell, the first DCI indicates a preamble initial transmission, and the second cell is a candidate cell;

[0071] Wherein, performing the first random access procedure includes maintaining a first counter; when the first DCI is received, a random access procedure is in progress; performing the first random access procedure on the second cell depends on the first DCI indicating a preamble initial transmission.

[0072] As a sub - embodiment of the above - mentioned embodiment, in response to the reception of the first DCI and the first DCI indicating the second cell and a random access procedure being in progress when the first DCI is received and the first DCI indicating a preamble initial transmission, perform the first random access procedure on the second cell.

[0073] As a sub - embodiment of the above - mentioned embodiment, as long as the first DCI is received and the first DCI indicates the second cell and a random access procedure is in progress when the first DCI is received and the first DCI indicates a preamble initial transmission, perform the first random access procedure on the second cell.

[0074] As a sub - embodiment of the above - mentioned embodiment, if the first DCI is received and the first DCI indicates the second cell and a random access procedure is in progress when the first DCI is received and the first DCI indicates a preamble initial transmission, do not continue the ongoing random access procedure.

[0075] As a sub - embodiment of the above - mentioned embodiment, the fact that performing the first random access procedure on the second cell depends on the first DCI indicating a preamble initial transmission means that performing the first random access procedure on the second cell is stipulated by the protocol.

[0076] As a sub - embodiment of the above - mentioned embodiment, the fact that performing the first random access procedure on the second cell depends on the first DCI indicating a preamble initial transmission means that whether to perform the first random access procedure on the second cell or continue the ongoing random access procedure does not depend on the UE implementation.

[0077] As a sub - embodiment of the above - mentioned embodiment, under the assumption that the first DCI is received, the first DCI indicates the second cell, a random access process is in progress when the first DCI is received, and the first DCI indicates preamble re - transmission, continue the current random access process.

[0078] As a sub - embodiment of the above - mentioned embodiment, under the assumption that the first DCI is received, the first DCI indicates the second cell, a random access process is in progress when the first DCI is received, and the first DCI indicates preamble re - transmission, the UE is implemented to determine whether to continue the current random access process.

[0079] As a sub - embodiment of the above - mentioned embodiment, the random access process is any random access process on the first MAC entity.

[0080] As a sub - embodiment of the above - mentioned embodiment, the random access process is a random access process on any serving cell on the first MAC entity.

[0081] As a sub - embodiment of the above - mentioned embodiment, the random access process is a random access process on any candidate cell on the first MAC entity.

[0082] As a sub - embodiment of the above - mentioned embodiment, in response to the reception of the first DCI, stop the ongoing random access process and perform a first random access process on the second cell.

[0083] As a sub - embodiment of the above - mentioned embodiment, in response to the reception of the first DCI, stop the ongoing random access process and perform a first random access process on the second cell.

[0084] As a sub - embodiment of the above - mentioned embodiment, the above method avoids the UE from implementing to continue the current random access process.

[0085] As a sub - embodiment of the above - mentioned embodiment, the above method avoids the unreasonable counting of the subsequent first counter caused by the UE continuing the current random access process.

[0086] As a sub - embodiment of the above - mentioned embodiment, the meanings of "receiving the first DCI on the first cell", "performing a first random access process on the second cell in response to the reception of the first DCI", "the first DCI indicates the second cell", "the second cell is a candidate cell", and "maintaining the first counter" refer to Embodiment 1 and will not be elaborated here.

[0087] The present application discloses a first node for use in wireless communication, characterized by comprising:

[0088] A first processor, which receives a first DCI on a first cell; and in response to the reception of the first DCI, performs a first random access procedure on a second cell; wherein the first DCI indicates the second cell, and the first DCI indicates a preamble initial transmission;

[0089] Wherein, performing the first random access procedure includes maintaining a first counter. Brief Description of the Drawings

[0090] Other features, objects, and advantages of the present application will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings:

[0091] Figure 1 Shows a flowchart according to an embodiment of the present application;

[0092] Figure 2 Shows a schematic diagram of a network architecture according to an embodiment of the present application;

[0093] Figure 3 Shows a schematic diagram of an embodiment of a radio protocol architecture of a user plane and a control plane according to an embodiment of the present application;

[0094] Figure 4 Shows a schematic diagram of a first communication device and a second communication device according to an embodiment of the present application;

[0095] Figure 5 Shows a flowchart of a radio signal transmission according to an embodiment of the present application;

[0096] Figure 6 Shows a block diagram of a processing device in a first node according to an embodiment of the present application;

[0097] Figure 7 Shows a block diagram of a processing device in a second node according to an embodiment of the present application. Detailed Embodiments

[0098] The technical solutions of the present application will be further described in detail below in conjunction with the drawings. It should be noted that, without conflict, the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily.

[0099] Example 1

[0100] Embodiment 1 exemplifies a flowchart according to an embodiment of the present application, as shown in the appendix Figure 1As shown in the appended Figure 1 In the figure, each box represents a step. It should be particularly emphasized that the order of the boxes in the figure does not represent the temporal sequence of the steps they represent.

[0101] In Embodiment 1, the first node in the present application, in step 101, receives a first DCI on a first cell; in step 102, in response to the reception of the first DCI, performs a first random access procedure on a second cell; wherein, the first DCI indicates the second cell, and the first DCI indicates preamble retransmission; wherein, performing the first random access procedure includes considering that the first DCI indicates preamble initial transmission and maintaining a first counter.

[0102] As an embodiment, the first cell is a serving cell.

[0103] As an embodiment, the first cell is a PCell (Primary Cell).

[0104] As an embodiment, the first cell is a PSCell (Primary SCG (Secondary CellGroup) Cell).

[0105] As an embodiment, the first DCI is addressed to a C(Cell)-RNTI (Radio Network Temporary Identifier) of the first node in the first cell.

[0106] As an embodiment, the first DCI is addressed to a C-RNTI of the first node in the first cell.

[0107] As an embodiment, the CRC (cyclic redundancy check) of the first DCI is scrambled by a C-RNTI of the first node in the first cell.

[0108] As an embodiment, the first DCI is a PDCCH order.

[0109] As an embodiment, the first DCI is for a candidate cell.

[0110] As an embodiment, the first DCI is for the second cell.

[0111] As an embodiment, the first DCI is for early uplink synchronization of the second cell.

[0112] As an example, the format of the first DCI is DCI Format 1_0.

[0113] As an example, the first DCI is for a random access procedure initiated by a PDCCH order.

[0114] As an example, the first DCI includes an Identifier for DCI formats field, the Identifier for DCI formats field is set to 1, the first DCI includes a Frequency domain resource assignment field, and the Frequency domain resource assignment field is set to all 1s.

[0115] As an example, the first DCI includes a first bit block that indicates the second cell.

[0116] As an example, the first bit block in the first DCI is a Cell indicator field.

[0117] As an example, the value of the first bit block in the first DCI corresponds to the first cell.

[0118] As an example, the value of the first bit block in the first DCI is greater than 0.

[0119] As an example, the value of the first bit block in the first DCI is mapped to the second cell.

[0120] As an example, the value of the first bit block in the first DCI indicates the second cell.

[0121] As an example, the first random access procedure is a CFRA (Contention Free Random Access).

[0122] As an example, the first random access procedure is on the second cell.

[0123] As an example, the preamble of the first random access procedure is sent on the second cell.

[0124] As an example, the first DCI initiates the first random access procedure on the second cell.

[0125] As an embodiment, the first DCI triggers the initiation of the first random access procedure on the second cell.

[0126] As an embodiment, the first DCI indicates to perform the first random access procedure on the second cell.

[0127] As an embodiment, the second cell is a candidate cell.

[0128] As an embodiment, the candidate cell is an LTM candidate cell.

[0129] As an embodiment, the candidate cell is a CHO candidate cell.

[0130] As an embodiment, the candidate cell is a CPC candidate cell.

[0131] As an embodiment, the candidate cell is a pre-configured cell.

[0132] As an embodiment, the candidate cell is configured by an RRC message.

[0133] As an embodiment, the second cell is a candidate cell indicated by an LTM-CandidateId.

[0134] As an embodiment, the second cell is configured for the first cell.

[0135] As an embodiment, the second cell is configured for the cell group to which the first cell belongs.

[0136] As an embodiment, the first DCI includes a second bit block, and the second bit block indicates preamble retransmission.

[0137] As an embodiment, the second bit block in the first DCI is a bit in the first DCI.

[0138] As a sub-embodiment of the above embodiment, the second bit block in the first DCI is a PRACH retransmission indicator field.

[0139] As a sub-embodiment of the above embodiment, the second bit block in the first DCI is set to 1; setting the second bit block in the first DCI to 1 indicates preamble retransmission.

[0140] As an ancillary embodiment of the above sub-embodiment, assuming that the second bit block in the first DCI is set to 0, the second bit block in the first DCI indicates preamble initial transmission.

[0141] As a sub - embodiment of the above - mentioned embodiment, the value of the second bit block in the first DCI not being flipped indicates a preamble re - transmission.

[0142] As an accessory embodiment of the above - mentioned sub - embodiment, under the assumption that the second bit block in the first DCI is flipped, the second bit block in the first DCI indicates a preamble initial transmission.

[0143] As an accessory embodiment of the above - mentioned sub - embodiment, the second bit block in the first DCI being flipped / the second bit block in the first DCI not being flipped means that the second bit block in the first DCI is different from the second bit block in the last PDCCH order received by the first node for the first cell / the second bit block in the first DCI is the same as the second bit block in the last PDCCH order received by the first node for the first cell; the first DCI is a PDCCH order for the first cell.

[0144] As an embodiment, the second bit block in the first DCI is at least one bit in the first DCI.

[0145] As a sub - embodiment of the above - mentioned embodiment, the number of the at least one bit is not less than 1.

[0146] As a sub - embodiment of the above - mentioned embodiment, the number of the at least one bit is greater than 1.

[0147] As a sub - embodiment of the above - mentioned embodiment, the number of the at least one bit is fixed.

[0148] As a sub - embodiment of the above - mentioned embodiment, the number of the at least one bit depends on the RRC (Radio Resource Control) configuration.

[0149] As a sub - embodiment of the above - mentioned embodiment, the number of the at least one bit is where M is the maximum number of transmissions of the PDCCH order configured by RRC.

[0150] As a sub - embodiment of the above - mentioned embodiment, the second bit block in the first DCI being set to greater than 0 indicates a preamble re - transmission.

[0151] As a sub - embodiment of the above - mentioned embodiment, the second bit block in the first DCI being set to not less than 1 indicates a preamble re - transmission.

[0152] As a sub - embodiment of the above - mentioned embodiment, the second bit block in the first DCI is a PRACH retransmission indicator field.

[0153] As a sub - embodiment of the above - mentioned embodiment, the second bit block in the first DCI is located after the first bit block in the first DCI.

[0154] As an embodiment, there is at least one field between the second bit block in the first DCI and the first bit block in the first DCI.

[0155] As an embodiment, there is no field between the second bit block in the first DCI and the first bit block in the first DCI.

[0156] As an embodiment, the statement that the first DCI indicates preamble initial transmission means that the first node believes that the first DCI indicates preamble initial transmission.

[0157] As an embodiment, the statement that the first DCI indicates preamble initial transmission means that the MAC entity corresponding to the second cell believes that the first DCI indicates preamble initial transmission; the MAC entity corresponding to the first cell and the MAC entity corresponding to the second cell are different.

[0158] As an embodiment, the statement that the first DCI indicates preamble initial transmission means that the first MAC entity believes that the first DCI indicates preamble initial transmission.

[0159] As an embodiment, the first MAC entity is the MAC entity corresponding to the first cell.

[0160] As an embodiment, the first MAC entity is the MAC entity corresponding to the cell group to which the first cell belongs.

[0161] As an embodiment, the second cell and the first cell share the first MAC entity.

[0162] As an embodiment, the second cell and the cell group to which the first cell belongs share the first MAC entity.

[0163] As an embodiment, the statement that the first DCI indicates preamble initial transmission means that it is assumed that the first DCI indicates preamble initial transmission.

[0164] As an example, the statement that the first DCI indicates a preamble initial transmission means: regarding the first DCI as indicating a preamble initial transmission.

[0165] As an example, the statement that the first DCI indicates a preamble initial transmission means: even though the first DCI indicates a preamble retransmission, it is not considered that the first DCI indicates a preamble retransmission.

[0166] As an example, the statement that the first DCI indicates a preamble initial transmission means: regarding the preamble retransmission indicated by the first DCI as a preamble initial transmission.

[0167] As an example, the statement that the first DCI indicates a preamble initial transmission means: considering the PRACH retransmission indicator field of the first DCI to be 0; where the PRACH retransmission indicator field of the first DCI is set to 1.

[0168] As an example, during the initialization process of the first random access procedure, it is considered that the first DCI indicates a preamble initial transmission.

[0169] As an example, at the start of the initialization process of the first random access procedure, it is considered that the first DCI indicates a preamble initial transmission.

[0170] As an example, before flushing the Msg3 buffer, it is considered that the first DCI indicates a preamble initial transmission.

[0171] As an example, after flushing the Msg3 buffer, it is considered that the first DCI indicates a preamble initial transmission.

[0172] As an example, before maintaining the first counter, it is considered that the first DCI indicates a preamble initial transmission.

[0173] As an example, during the maintenance of the first counter, it is considered that the first DCI indicates a preamble initial transmission.

[0174] As an example, the name of the first counter includes PREAMBLE_POWER_RAMPING_COUNTER.

[0175] As an example, the first counter is a PREAMBLE_POWER_RAMPING_COUNTER.

[0176] As an example, the value of PREAMBLE_RECEIVED_TARGET_POWER depends on the first counter.

[0177] As an example, the first counter is used to determine PREAMBLE_RECEIVED_TARGET_POWER.

[0178] As an example, during the first random access procedure, PREAMBLE_RECEIVED_TARGET_POWER is set.

[0179] As an example, after maintaining the first counter, PREAMBLE_RECEIVED_TARGET_POWER is set.

[0180] As an example, before the preamble in the first random access procedure is sent, the PREAMBLE_RECEIVED_TARGET_POWER is set.

[0181] As an example, the transmission power of the preamble in the first random access procedure depends on the PREAMBLE_RECEIVED_TARGET_POWER.

[0182] As an example, the transmission power of the preamble in the first random access procedure is calculated according to the PREAMBLE_RECEIVED_TARGET_POWER.

[0183] As an example, the transmission power of the preamble in the first random access procedure is calculated according to the PREAMBLE_RECEIVED_TARGET_POWER.

[0184] As an example, the transmission power of the preamble in the first random access procedure is determined according to P PRACH,b,f,c (i) = min{P CMAX,f,c (i), P PRACH,target,f,c + PL b,f,c}[dBm]; where the P PRACH,target,f,c is the PREAMBLE_RECEIVED_TARGET_POWER.

[0185] As an example, setting the PREAMBLE_RECEIVED_TARGET_POWER means setting the PREAMBLE_RECEIVED_TARGET_POWER to preambleReceivedTargetPower + DELTA_PREAMBLE + (the first counter - 1) × PREAMBLE_POWER_RAMPING_STEP + POWER_OFFSET_2STEP_RA.

[0186] As an example, setting the PREAMBLE_RECEIVED_TARGET_POWER means setting the PREAMBLE_RECEIVED_TARGET_POWER to preambleReceivedTargetPower + DELTA_PREAMBLE + (the first counter - 1) × PREAMBLE_POWER_RAMPING_STEP.

[0187] As an example, setting the PREAMBLE_RECEIVED_TARGET_POWER means setting the PREAMBLE_RECEIVED_TARGET_POWER to preambleReceivedTargetPower + (the first counter - 1) × PREAMBLE_POWER_RAMPING_STEP.

[0188] As an example, the values of preambleReceivedTargetPower and PREAMBLE_POWER_RAMPING_STEP are configured by an RRC message.

[0189] Example 2

[0190] Embodiment 2 exemplifies a schematic diagram of a network architecture according to an embodiment of the present application, as shown in the appendix Figure 2 shown. Appendix Figure 2Describes the network architecture 200. The network architecture 200 is a 5G NR (New Radio) / LTE (Long-Term Evolution) / LTE-A (Long-Term Evolution Advanced) system, or the network architecture 200 is a 5G+ network architecture, or the network architecture 200 is a 6G network architecture, or the network architecture 200 is a network architecture that continues to evolve in the future by 3GPP; the network architecture 200 can be referred to as 5GS (5G System) / EPS (Evolved Packet System), or the network architecture 200 can be referred to as 6GS (6G System); the network architecture 200 includes at least one of UE (User Equipment) 201, RAN (Radio Access Network) 202, core network 210, HSS (Home Subscriber Server) / UDM (Unified Data Management) 220, and Internet service 230. The network architecture 200 can be interconnected with other access networks, but these entities / interfaces are not shown for simplicity. As shown in the figure, the network architecture 200 provides packet switching services. However, those skilled in the art will easily understand that the various concepts presented throughout this application can be extended to networks that provide circuit switching services or other cellular networks. The RAN includes node 203 and other nodes 204. Node 203 provides user and control plane protocol termination towards UE 201. Node 203 can be connected to other nodes 204 via the Xn interface (e.g., backhaul) / X2 interface. Node 203 can also be referred to as a base station, base transceiver station, radio base station, radio transceiver, transceiver function, basic service set (BSS), extended service set (ESS), TRP (Transmission and Reception Point), or some other suitable term. The core network 210 is a 5GC (5G Core Network) / EPC (Evolved Packet Core), or the core network 210 is a 6GC; node 203 provides an access point to the core network 210 for UE 201. Examples of UE 201 include cellular phones, smartphones, Session Initiation Protocol (SIP) phones, laptop computers, personal digital assistants (PDAs), satellite radios, non-terrestrial base station communications, satellite mobile communications, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, drones, aircraft, narrowband Internet of Things devices, machine type communication devices, land vehicles, automobiles, wearable devices, or any other similar functional devices.Those skilled in the art may also refer to the UE 201 as a mobile station, subscriber station, mobile unit, subscriber unit, radio unit, remote unit, mobile device, radio device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term. The node 203 is connected to the core network 210 through the S1 / NG interface. The core network 210 includes an MME (Mobility Management Entity) / AMF (Authentication Management Field) / SMF (Session Management Function) 211, other MME / AMF / SMFs 214, an S-GW (Service Gateway) / UPF (User Plane Function) 212, and a P-GW (Packet Date Network Gateway) / UPF 213. The MME / AMF / SMF 211 is a control node that processes the signaling between the UE 201 and the core network 210. Generally, the MME / AMF / SMF 211 provides bearer and connection management. All user IP (Internet Protocol) packets are transmitted through the S-GW / UPF 212, and the S-GW / UPF 212 is itself connected to the P-GW / UPF 213. The P-GW provides UE IP address allocation and other functions. The P-GW / UPF 213 is connected to the Internet service 230. The Internet service 230 includes operator-corresponding Internet protocol services, specifically including the Internet, intranet, IMS (IP Multimedia Subsystem), and packet-switched streaming services.

[0191] As an example, the UE 201 is a user equipment (UE).

[0192] As an example, the UE 201 is a base station (BS) device.

[0193] As an example, the UE 201 is a relay device.

[0194] As an example, the UE 201 is a gateway device.

[0195] As an example, the node 203 corresponds to the second node in this application.

[0196] As an example, the node 203 is a base station device.

[0197] As an example, the node 203 is a user equipment.

[0198] As an example, the node 203 is a relay device.

[0199] As an example, the node 203 is a gateway device.

[0200] Typically, the UE 201 is a user equipment, and the node 203 is a base station device.

[0201] Typically, the UE 201 is a user equipment, and the node 203 is a user equipment.

[0202] Typically, the UE 201 is a base station device, and the node 203 is a base station device.

[0203] As an example, the node 204 corresponds to the third node in the present application.

[0204] As an example, the node 204 is a base station device.

[0205] As an example, the node 204 is a user equipment.

[0206] As an example, the node 204 is a relay device.

[0207] As an example, the node 204 is a gateway device.

[0208] As an example, the UE 201 is simultaneously connected to both the node 203 and the node 204.

[0209] As an example, the node 203 and the node 204 are connected by an ideal backhaul.

[0210] As an example, the node 203 and the node 204 are connected by a non-ideal backhaul.

[0211] As an example, both the node 203 and the node 204 provide radio resources for the UE 201 simultaneously.

[0212] As an example, the node 203 and the node 204 do not provide radio resources for the UE 201 simultaneously.

[0213] As an example, the node 203 and the node 204 are the same node.

[0214] As an example, the node 203 and the node 204 are two different nodes.

[0215] As an example, the node 203 and the node 204 are of the same type.

[0216] As an example, the node 203 and the node 204 are of different types.

[0217] Typically, the UE 201 is a user equipment, the node 203 is a base station equipment, and the node 204 is a base station equipment.

[0218] Typically, the UE 201 is a user equipment, the node 203 is a user equipment, and the node 204 is a user equipment.

[0219] Typically, the UE 201 is a base station equipment, the node 203 is a base station equipment, and the node 204 is a base station equipment.

[0220] As an example, the user equipment supports the transmission of a Non-Terrestrial Network (NTN).

[0221] As an example, the user equipment supports the transmission of a Terrestrial Network.

[0222] As an example, the user equipment supports LTM.

[0223] As an example, the user equipment supports intra-CU LTM.

[0224] As an example, the user equipment supports inter-CU LTM.

[0225] As an example, the user equipment supports conditional LTM.

[0226] As an example, the user equipment supports CHO.

[0227] As an example, the user equipment supports CPC.

[0228] As an example, the user equipment supports IAB.

[0229] As an example, the user equipment supports handover.

[0230] As an example, the user equipment supports early uplink synchronization.

[0231] As an embodiment, the user equipment supports candidate cells.

[0232] As an embodiment, the user equipment supports Dual Connection (DC) transmission.

[0233] As an embodiment, the user equipment includes an aircraft.

[0234] As an embodiment, the user equipment includes a vehicle-mounted terminal.

[0235] As an embodiment, the user equipment includes a ship.

[0236] As an embodiment, the user equipment includes an Internet of Things (IoT) terminal.

[0237] As an embodiment, the user equipment includes a terminal of the industrial Internet of Things.

[0238] As an embodiment, the user equipment includes a device supporting low-latency and high-reliability transmission.

[0239] As an embodiment, the user equipment includes a test device.

[0240] As an embodiment, the user equipment includes a signaling tester.

[0241] As an embodiment, the user equipment includes an IAB (Integrated Access and Backhaul)-MT (Mobile Termination).

[0242] As an embodiment, the base station equipment supports transmission in a non-terrestrial network.

[0243] As an embodiment, the base station equipment supports transmission in a terrestrial network.

[0244] As an embodiment, the base station equipment includes a Base Transceiver Station (BTS).

[0245] As an embodiment, the base station equipment includes a NodeB (NB).

[0246] As an embodiment, the base station equipment includes a gNB.

[0247] As an embodiment, the base station equipment includes an eNB.

[0248] As an embodiment, the base station equipment includes an ng-eNB.

[0249] As an example, the base station device includes an en-gNB.

[0250] As an example, the base station device includes a CU (Centralized Unit).

[0251] As an example, the base station device includes a DU (Distributed Unit).

[0252] As an example, the base station device includes a TRP (Transmitter Receiver Point).

[0253] As an example, the base station device includes a macro cellular base station.

[0254] As an example, the base station device includes a micro cell base station.

[0255] As an example, the base station device includes a pico cell base station.

[0256] As an example, the base station device includes a femtocell.

[0257] As an example, the base station device includes a flying platform device.

[0258] As an example, the base station device includes a satellite device.

[0259] As an example, the base station device includes a test device.

[0260] As an example, the base station device includes a signaling tester.

[0261] As an example, the base station device includes a gateway device.

[0262] As an example, the base station device includes an IAB-node.

[0263] As an example, the base station device includes an IAB-donor.

[0264] As an example, the base station device includes an IAB-donor-CU.

[0265] As an example, the base station device includes an IAB-donor-DU.

[0266] As an example, the base station device includes an IAB-DU.

[0267] As an embodiment, the base station device includes an IAB-MT.

[0268] As an embodiment, the relay device includes a relay.

[0269] As an embodiment, the relay device includes an L3 relay.

[0270] As an embodiment, the relay device includes an L2 relay.

[0271] As an embodiment, the relay device includes a router.

[0272] As an embodiment, the relay device includes a switch.

[0273] As an embodiment, the relay device includes a gateway device.

[0274] As an embodiment, the relay device includes a user equipment.

[0275] As an embodiment, the relay device includes a base station device.

[0276] Example 3

[0277] Embodiment 3 shows a schematic diagram of an embodiment of a radio protocol architecture for a user plane and a control plane according to the present application, as shown in the appendix Figure 3 as 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 3The radio protocol architecture for controlling 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 PHY301 herein. Layer 2 (L2 layer) 305 is above PHY301 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 handover 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 disordered 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) of the control plane 300 is responsible for obtaining radio resources (i.e., radio bearers) and configuring the lower layers using RRC signaling. 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 generally 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. However, 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 an SDAP (Service Data Adaptation Protocol) sublayer 356, and the SDAP sublayer 356 is responsible for mapping between QoS flows and data radio bearers (DRBs, Data Radio Bearer) to support service diversity.

[0278] As an example, the Figure 3 radio protocol architecture in is applicable to the first node described in this application.

[0279] As an example, the Figure 3The wireless protocol architecture in [reference] is applicable to the second node in this application.

[0280] As an example, the first DCI in this application is generated at the PHY301 or PHY351.

[0281] As an example, the second DCI in this application is generated at the PHY301 or PHY351.

[0282] As an example, the last preamble in this application is generated at the PHY301 or PHY351.

[0283] As an example, the preamble in the first random access procedure in this application is generated at the PHY301 or PHY351.

[0284] As an example, the preamble in the second random access procedure in this application is generated at the PHY301 or PHY351.

[0285] As an example, the first counter in this application is maintained at the MAC302 or MAC352.

[0286] Example 4

[0287] Embodiment 4 shows a schematic diagram of a first communication device and a second communication device according to this application, as shown in the appendix Figure 4 as shown. Figure 4 is a block diagram of a first communication device 450 and a second communication device 410 that communicate with each other in an access network.

[0288] 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.

[0289] 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.

[0290] In the transmission from the second communication device 410 to the first communication device 450, at the second communication device 410, upper layer data packets from the core network are provided to the controller / processor 475. The controller / processor 475 implements the functionality of the L2 layer. In the transmission from the second communication device 410 to the first communication device 450, the controller / processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation to the first communication device 450 based on various priority metrics. The controller / processor 475 is also responsible for 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 encoding and interleaving to facilitate forward error correction (FEC) at the second communication device 410, and 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 on the encoded and modulated symbols, including codebook-based precoding and non-codebook-based precoding, and beamforming processing, to generate one or more spatial streams. The transmit processor 416 then maps each spatial stream to subcarriers, multiplexes with reference signals (e.g., pilots) in the time domain and / or frequency domain, and then uses the inverse fast Fourier transform (IFFT) to generate a physical channel carrying a time-domain multi-carrier symbol stream. Subsequently, the multi-antenna transmit processor 471 performs transmit analog precoding / beamforming operations 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 different antennas 420.

[0291] 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 signals via its respective antenna 452. Each receiver 454 recovers the information modulated onto the radio frequency carrier and converts the radio frequency stream into a baseband multi-carrier symbol stream for providing to the receive processor 456. The receive processor 456 and the multi-antenna receive processor 458 perform various signal processing functions of the L1 layer. The multi-antenna receive processor 458 performs receive analog precoding / beamforming operations on the baseband multi-carrier symbol stream from the receivers 454. The receive processor 456 uses the fast Fourier transform (FFT) to convert the baseband multi-carrier symbol stream after the receive analog precoding / beamforming operations from the time domain to the frequency domain. In the frequency domain, the physical layer data signal and the reference signal are demultiplexed by the receive processor 456, where the reference signal will be used for channel estimation, and the data signal recovers any spatial streams destined for the first communication device 450 after multi-antenna detection in the multi-antenna receive processor 458. The symbols on each spatial stream are demodulated and recovered in the receive processor 456, and soft decisions are generated. Subsequently, the receive processor 456 decodes and de-interleaves the soft decisions to recover the upper layer data and control signals transmitted by the second communication device 410 on the physical channel. Subsequently, the upper layer data and control signals are provided to the controller / processor 459. The controller / processor 459 performs the functions of the L2 layer. The controller / processor 459 may be associated with a memory 460 that stores program code and data. The memory 460 may be referred to as a computer-readable medium. In the transmission from the second communication device 410 to the first communication device 450, the controller / processor 459 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover upper layer data packets from the core network. Subsequently, the upper layer data packets are provided to all protocol layers above the L2 layer. Various control signals may also be provided to the L3 for L3 processing.

[0292] In the transmission from the first communication device 450 to the second communication device 410, at the first communication device 450, the 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 described at the second communication device 410 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 the user plane and the control plane. The controller / processor 459 is also responsible for retransmitting lost packets and signaling to the second communication device 410. The transmit processor 468 performs modulation mapping and channel coding processing. The multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming processing. Subsequently, the transmit processor 468 modulates the generated spatial streams into multi-carrier / single-carrier symbol streams, and after the analog precoding / beamforming operation in the multi-antenna transmit processor 457, provides them to different antennas 452 via the transmitter 454. Each transmitter 454 first converts the baseband symbol stream provided by the multi-antenna transmit processor 457 into a radio frequency symbol stream and then provides it to the antenna 452.

[0293] In the transmission from the first communication device 450 to the second communication device 410, the functions at the second communication device 410 are similar to the receiving functions described at the first communication device 450 in the transmission from the second communication device 410 to the first communication device 450. Each receiver 418 receives radio frequency signals through its corresponding antenna 420, converts the received radio frequency signals into baseband signals, and provides the baseband signals to the multi-antenna receive processor 472 and the receive processor 470. The receive processor 470 and the multi-antenna receive processor 472 jointly implement the L1 layer functions. The controller / processor 475 implements the L2 layer functions. The controller / processor 475 may be associated with a memory 476 that stores program code and data. The memory 476 may be referred to as a computer-readable medium. In the transmission from the first communication device 450 to the second communication device 410, the controller / processor 475 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover upper layer data packets from the UE 450. The upper layer data packets from the controller / processor 475 may be provided to the core network.

[0294] As an example, the first communication device 450 includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used with the at least one processor, and the first communication device 450 at least: receives a first DCI on a first cell; in response to the reception of the first DCI, performs a first random access procedure on a second cell; wherein the first DCI indicates the second cell, and the first DCI indicates preamble retransmission; wherein performing the first random access procedure includes considering that the first DCI indicates preamble initial transmission and maintaining a first counter.

[0295] As an example, the first communication device 450 includes: a memory storing a computer-readable instruction program, the computer-readable instruction program generating actions when executed by at least one processor, the actions including: receiving a first DCI on a first cell; in response to the reception of the first DCI, performing a first random access procedure on a second cell; wherein the first DCI indicates the second cell, and the first DCI indicates preamble retransmission; wherein performing the first random access procedure includes considering that the first DCI indicates preamble initial transmission and maintaining a first counter.

[0296] As an example, the second communication device 410 includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used with the at least one processor. The second communication device 410 at least: sends a first DCI on a first cell; wherein, in response to the reception of the first DCI, the receiver of the first DCI performs a first random access procedure on a second cell; the first DCI indicates the second cell, and the first DCI indicates preamble retransmission; wherein performing the first random access procedure includes considering that the first DCI indicates preamble initial transmission and maintaining a first counter.

[0297] As an embodiment, the second communication device 410 includes: a memory storing a computer-readable instruction program, the computer-readable instruction program generating actions when executed by at least one processor, the actions including: sending a first DCI on a first cell; wherein, in response to receiving the first DCI, a receiver of the first DCI performs a first random access procedure on a second cell; the first DCI indicates the second cell, and the first DCI indicates preamble retransmission; wherein, performing the first random access procedure includes considering that the first DCI indicates preamble initial transmission and maintaining a first counter.

[0298] 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 DCI.

[0299] As an embodiment, at least one of the antenna 420, the transmitter 418, the transmitting processor 416, and the controller / processor 475 is used to send the first DCI.

[0300] As an embodiment, at least one of the antenna 452, the transmitter 454, the transmitting processor 468, and the controller / processor 459 is used to send a preamble.

[0301] As an embodiment, at least one of the antenna 420, the receiver 418, the receiving processor 470, and the controller / processor 475 is used to receive a preamble.

[0302] As an embodiment, the first communication device 450 corresponds to the first node in the present application.

[0303] As an embodiment, the second communication device 410 corresponds to the second node in the present application.

[0304] As an embodiment, the first communication device 450 is a user equipment.

[0305] As an embodiment, the first communication device 450 is a base station device.

[0306] As an embodiment, the first communication device 450 is a relay device.

[0307] As an embodiment, the second communication device 410 is a user equipment.

[0308] As an embodiment, the second communication device 410 is a base station device.

[0309] As an example, the second communication device 410 is a relay device.

[0310] Example 5

[0311] Example 5 exemplifies a wireless signal transmission flowchart according to an embodiment of the present application, as shown in the appendix Figure 5 It should be specifically noted that the order in this example does not limit the signal transmission order and the implementation order in the present application.

[0312] For First node U01 , in step S5101, a second DCI is received on the first cell, and the second DCI indicates the last preamble transmission; wherein, the last preamble transmission is on the second cell and the last preamble transmission is initiated by the second DCI; in step S5102, a preamble is sent, and the preamble is the last preamble transmission; wherein, the last preamble transmission is on the second cell and the last preamble transmission is initiated by the second DCI; in step S5103, the second random access procedure is performed; in step S5104, a first DCI is received on the first cell; in step S5105, in response to the reception of the first DCI, a first random access procedure is performed on the second cell; wherein, the first DCI indicates the second cell and the first DCI indicates preamble retransmission; in step S5105(a), in the first random access procedure, it is considered that the first DCI indicates preamble initial transmission; in step S5105(b), in the first random access procedure, a first counter is maintained; in step S5105(c), in the first random access procedure, a preamble is sent.

[0313] For Second node N02 , in step S5201, the second DCI is sent; in step S5202, the first DCI is sent.

[0314] For Third node N03 , in step S5201, a preamble is received; in step S5202, a preamble is received.

[0315] In Example 5, performing the first random access procedure includes considering that the first DCI indicates preamble initial transmission and maintaining a first counter.

[0316] As an example, there is a wireless connection between the first node U01 and the second node N02.

[0317] As an embodiment, there is a wired connection between the first node U01 and the second node N02.

[0318] As an embodiment, there is a Uu interface connection between the first node U01 and the second node N02.

[0319] As an embodiment, there is an IAB interface connection between the first node U01 and the second node N02.

[0320] As an embodiment, there is a PC5 interface connection between the first node U01 and the second node N02.

[0321] As an embodiment, there is a wireless interface connection between the third node N03 and the second node N02.

[0322] As an embodiment, there is a wired interface connection between the third node N03 and the second node N02.

[0323] As an embodiment, there is an Xn interface connection between the third node N03 and the second node N02.

[0324] As an embodiment, there is an X2 interface connection between the third node N03 and the second node N02.

[0325] As an embodiment, there is an ideal backhaul between the third node N03 and the second node N02.

[0326] As an embodiment, there is a non-ideal backhaul between the third node N03 and the second node N02.

[0327] As an embodiment, the third node N03 and the second node N02 belong to the same CU.

[0328] As an embodiment, the third node N03 and the second node N02 belong to the same DU.

[0329] As an embodiment, the third node N03 and the second node N02 belong to different CUs.

[0330] As an embodiment, the third node N03 and the second node N02 belong to different DUs.

[0331] As an embodiment, the first node U01 is a user equipment, the second node N02 is a base station equipment, and the third node N03 is a base station equipment.

[0332] As an example, the first node U01 is a user equipment, the second node N02 is a user equipment, and the third node N03 is a user equipment.

[0333] As an example, the first node U01 is a base station device, the second node N02 is a base station device, and the third node N03 is a base station device.

[0334] As an example, the dashed box F5.1 is optional.

[0335] As an example, the dashed box F5.1 exists.

[0336] As an example, the dashed box F5.1 exists and the dashed box F5.2 exists.

[0337] As an example, the dashed box F5.1 exists, the dashed box F5.2 exists, and the step S5103 exists.

[0338] As an example, the dashed box F5.1 does not exist.

[0339] As an example, the dashed box F5.2 is optional.

[0340] As an example, the dashed box F5.2 exists.

[0341] As a sub - example of the above example, the last preamble transmission is triggered by the second DCI.

[0342] As a sub - example of the above example, the last preamble transmission is triggered by the first node U01.

[0343] As a sub - example of the above example, on the condition that the last preamble transmission is on the second cell, it is considered that the first DCI indicates that the preamble initial transmission is only executed.

[0344] As a sub - example of the above example, on the condition that the last preamble transmission is on the second cell and the last preamble transmission is for early uplink synchronization, it is considered that the first DCI indicates that the preamble initial transmission is only executed.

[0345] As a sub - example of the above example, on the condition that the last preamble transmission is on the second cell and the last preamble transmission is initiated by the second DCI, it is considered that the first DCI indicates that the preamble initial transmission is only executed.

[0346] As a sub - embodiment of the above - mentioned embodiment, if the previous preamble transmission is not on the second cell, it is considered that the first DCI indicates that the preamble initial transmission is not executed and the first counter is set to 1.

[0347] As an embodiment, the dashed - line box F5.2 exists and the step S5103 exists.

[0348] As an embodiment, the dashed - line box F5.2 does not exist.

[0349] As an embodiment, the step S5103 is optional.

[0350] As an embodiment, the step S5103 exists.

[0351] As an embodiment, the step S5103 does not exist.

[0352] As an embodiment, the step S5105(c) is optional.

[0353] As an embodiment, the step S5105(c) exists.

[0354] As a sub - embodiment of the above - mentioned embodiment, the preamble is sent.

[0355] As a sub - embodiment of the above - mentioned embodiment, the preamble is sent according to the random access resource indicated by the first DCI.

[0356] As a sub - embodiment of the above - mentioned embodiment, as a response to the preamble being sent, the random access response is monitored.

[0357] As a sub - embodiment of the above - mentioned embodiment, as a response to the preamble being sent, the random access response is not monitored.

[0358] As a sub - embodiment of the above - mentioned embodiment, as a response to the preamble being sent, it is considered that the first random access process is successfully completed.

[0359] As an embodiment, the step S5105(c) does not exist.

[0360] As a sub - embodiment of the above - mentioned embodiment, the preamble is not sent.

[0361] As a sub - embodiment of the above - mentioned embodiment, the preamble is cancelled.

[0362] As a sub - embodiment of the above - mentioned embodiment, the first random access procedure is stopped.

[0363] As a sub - embodiment of the above - mentioned embodiment, the first random access procedure is aborted.

[0364] As a sub - embodiment of the above - mentioned embodiment, the first random access procedure is cancelled.

[0365] As a sub - embodiment of the above - mentioned embodiment, the first random access procedure is not completed.

[0366] As an embodiment, the second DCI indicates the second cell.

[0367] As an embodiment, the second DCI is a PDCCH order.

[0368] As an embodiment, the second DCI indicates preamble re - transmission.

[0369] As an embodiment, the second DCI indicates preamble initial transmission.

[0370] As an embodiment, the second DCI indicates either preamble re - transmission or preamble initial transmission.

[0371] As an embodiment, the second DCI indicates the index of the preamble of the last preamble transmission.

[0372] As an embodiment, the second DCI indicates the SSB corresponding to the last preamble transmission.

[0373] As an embodiment, the SSB indicated by the first DCI is the same as the SSB corresponding to the last preamble transmission.

[0374] As an embodiment, the SSB indicated by the first DCI is different from the SSB corresponding to the last preamble transmission.

[0375] As an embodiment, the second DCI triggers a random access procedure, in which the last preamble transmission is performed.

[0376] As an embodiment, the last preamble transmission is for early uplink synchronization.

[0377] As an embodiment, the last preamble transmission is indicated by the second DCI.

[0378] As an embodiment, the previous preamble transmission includes a RandomAccess procedure initialization procedure.

[0379] As an embodiment, the previous preamble transmission does not include a RandomAccess procedure initialization procedure.

[0380] As an embodiment, the previous preamble transmission includes: the previous random access procedure.

[0381] As an embodiment, the previous preamble transmission belongs to: the previous random access procedure.

[0382] As an embodiment, the previous preamble transmission is: the previous random access procedure.

[0383] As an embodiment, the previous preamble transmission includes: the previous Random Access Preamble transmission procedure.

[0384] As an embodiment, the previous preamble transmission belongs to: the previous Random Access Preamble transmission procedure.

[0385] As an embodiment, the previous preamble transmission is: the previous Random Access Preamble transmission procedure.

[0386] As an embodiment, the previous preamble transmission includes: sending a preamble in the random access procedure to which the previous preamble transmission belongs.

[0387] As an embodiment, the previous preamble transmission includes: instructing the physical layer to send a preamble in the random access procedure to which the previous preamble transmission belongs.

[0388] As an embodiment, the previous preamble transmission includes: sending a preamble in the random access procedure to which the previous preamble transmission belongs at the physical layer.

[0389] As an embodiment, the previous preamble transmission is sent at the physical layer.

[0390] As an embodiment, the previous preamble transmission is not sent at the physical layer.

[0391] As an example, the last preamble transmission refers to the last preamble transmission on the first MAC entity.

[0392] As an example, the last preamble transmission refers to the last preamble transmission on the first MAC entity by the first node U01.

[0393] As an example, the last preamble transmission refers to the last preamble transmission.

[0394] As an example, the last preamble transmission refers to the previous preamble transmission.

[0395] As an example, the last preamble transmission refers to the most recent preamble transmission.

[0396] As an example, the last preamble transmission is before the reception of the first DCI.

[0397] As an example, within the time interval from the last preamble transmission to the reception of the first DCI, the first node U01 does not perform a preamble transmission on the first MAC entity.

[0398] As an example, within the time interval from the last preamble transmission to the reception of the first DCI, the first node U01 does not successfully perform a preamble transmission on the first MAC entity.

[0399] As an example, within the time interval from the last preamble transmission to the reception of the first DCI, there is no preamble transmission on the first MAC entity.

[0400] As an example, within the time interval from the last preamble transmission to the reception of the first DCI, there is no completed preamble transmission on the first MAC entity.

[0401] As an example, the last preamble transmission is before the initiation of the first random access procedure.

[0402] As an example, within the time interval from the last preamble transmission to the initiation of the first random access procedure, the first node U01 does not perform a preamble transmission on the first MAC entity.

[0403] As an example, within the time interval from the last preamble transmission to the time when the first random access procedure is initiated, the first node U01 fails to successfully perform a preamble transmission on the first MAC entity.

[0404] As an example, within the time interval from the last preamble transmission to the time when the first random access procedure is initiated, there is no preamble transmission on the first MAC entity.

[0405] As an example, within the time interval from the last preamble transmission to the time when the first random access procedure is initiated, there is no completed preamble transmission on the first MAC entity.

[0406] As an example, the last preamble transmission on the second cell means that the last preamble transmission is sent on the second cell.

[0407] As an example, the last preamble transmission on the second cell means that the PRACH resource of the last preamble transmission belongs to the second cell.

[0408] As an example, the last preamble transmission on the second cell means that one DCI indicating the last preamble transmission indicates the second cell.

[0409] As an example, the last preamble transmission on the second cell means that the random access procedure to which the last preamble transmission belongs is on the second cell.

[0410] As an example, as a response to at least the last preamble transmission being on the second cell and the last preamble transmission being initiated by the second DCI, it is considered that the first DCI indicates a preamble initial transmission.

[0411] As an example, when at least the last preamble transmission is on the second cell and the last preamble transmission is initiated by the second DCI, it is considered that the first DCI indicates a preamble initial transmission.

[0412] As an example, if at least the last preamble transmission is on the second cell and the last preamble transmission is initiated by the second DCI, it is considered that the first DCI indicates a preamble initial transmission.

[0413] As an example, it is considered that the first DCI indicating the preamble initial transmission depends on the second random access procedure; the second random access procedure is before the first random access procedure.

[0414] As a sub - example of the above - mentioned example, it is considered that the first DCI indicates the preamble initial transmission as a response to the existence of the second random access procedure.

[0415] As a sub - example of the above - mentioned example, it is considered that the first DCI indicates the preamble initial transmission as a response to at least the existence of the second random access procedure.

[0416] As a sub - example of the above - mentioned example, if the second random access procedure does not exist, it is considered that the first DCI indicating the preamble initial transmission is not executed.

[0417] As a sub - example of the above - mentioned example, the second random access procedure is after the last preamble transmission.

[0418] As a sub - example of the above - mentioned example, the second random access procedure is after the last preamble transmission and before the first random access procedure.

[0419] As a sub - example of the above - mentioned example, the second random access procedure is after the second DCI is received.

[0420] As a sub - example of the above - mentioned example, the second random access procedure is after the second DCI is received and before the first random access procedure.

[0421] As a sub - example of the above - mentioned example, the second random access procedure is any random access procedure on the first MAC entity after the last preamble transmission and before the first random access procedure.

[0422] As a sub - example of the above - mentioned example, the second random access procedure is any random access procedure on the first MAC entity after the last preamble transmission and before the first random access procedure for any serving cell of the cell group to which the first cell belongs.

[0423] As a sub - example of the above - mentioned example, the second random access procedure is any random access procedure for the second cell after the last preamble transmission and before the first random access procedure.

[0424] As a sub - embodiment of the above - mentioned embodiment, the second random access procedure is performed on the first MAC entity.

[0425] As a sub - embodiment of the above - mentioned embodiment, the second random access procedure is for any candidate cell.

[0426] As a sub - embodiment of the above - mentioned embodiment, any candidate cell is an LTM candidate cell.

[0427] As a sub - embodiment of the above - mentioned embodiment, any candidate cell is a CHO candidate cell.

[0428] As a sub - embodiment of the above - mentioned embodiment, any candidate cell is a CPC candidate cell.

[0429] As a sub - embodiment of the above - mentioned embodiment, any candidate cell is a candidate cell other than the second cell.

[0430] As a sub - embodiment of the above - mentioned embodiment, the second random access procedure is for the second cell.

[0431] As a sub - embodiment of the above - mentioned embodiment, the second random access procedure is for any serving cell of the first node U01.

[0432] As a sub - embodiment of the above - mentioned embodiment, the second random access procedure is for any serving cell of the cell group to which the first cell belongs.

[0433] As a sub - embodiment of the above - mentioned embodiment, the cell group to which the first cell belongs is an MCG; the first cell is a PCell.

[0434] As a sub - embodiment of the above - mentioned embodiment, the cell group to which the first cell belongs is an SCG; the first cell is a PSCell.

[0435] As a sub - embodiment of the above - mentioned embodiment, the second random access procedure is initiated after the last preamble transmission.

[0436] As a sub - embodiment of the above - mentioned embodiment, the second random access procedure is initiated after the last DCI indicating preamble transmission in the second cell.

[0437] As a sub - embodiment of the above - mentioned embodiment, the second random access procedure is not completed.

[0438] As a sub - embodiment of the above - mentioned embodiment, the second random access procedure not being completed includes: the second random access procedure is aborted.

[0439] As a sub - embodiment of the above - mentioned embodiment, the non - completion of the second random access procedure includes: the second random access procedure is aborted by the first node U01.

[0440] As a sub - embodiment of the above - mentioned embodiment, the non - completion of the second random access procedure includes: the second random access procedure is aborted by the network side.

[0441] As a sub - embodiment of the above - mentioned embodiment, the non - completion of the second random access procedure includes: the second random access procedure is interrupted.

[0442] As a sub - embodiment of the above - mentioned embodiment, the non - completion of the second random access procedure includes: the second random access procedure is interrupted by the first node U01.

[0443] As a sub - embodiment of the above - mentioned embodiment, the non - completion of the second random access procedure includes: the second random access procedure is interrupted by the network side.

[0444] As a sub - embodiment of the above - mentioned embodiment, the non - completion of the second random access procedure includes: the second random access procedure is stopped.

[0445] As a sub - embodiment of the above - mentioned embodiment, the non - completion of the second random access procedure includes: the second random access procedure is stopped by the first node U01.

[0446] As a sub - embodiment of the above - mentioned embodiment, the non - completion of the second random access procedure includes: the second random access procedure is stopped by the network side.

[0447] As a sub - embodiment of the above - mentioned embodiment, the second random access procedure does not include the last preamble transmission.

[0448] As a sub - embodiment of the above - mentioned embodiment, the second random access procedure is not the random access procedure triggered by the second DCI.

[0449] As a sub - embodiment of the above - mentioned embodiment, no preamble is sent during the second random access procedure.

[0450] As a sub - embodiment of the above - mentioned embodiment, no preamble is sent during the second random access procedure includes: the preamble is cancelled.

[0451] As a sub - embodiment of the above - mentioned embodiment, no preamble is sent during the second random access procedure includes: the preamble is cancelled at a lower layer.

[0452] As a sub - embodiment of the above - mentioned embodiment, the non - transmission of the preamble in the second random access procedure includes: the preamble is cancelled at the MAC sub - layer.

[0453] As a sub - embodiment of the above - mentioned embodiment, the non - transmission of the preamble in the second random access procedure includes: receiving a LBT failure indication from a lower layer for the preamble transmission.

[0454] As a sub - embodiment of the above - mentioned embodiment, the non - transmission of the preamble in the second random access procedure includes: receiving an indication from a lower layer that the preamble transmission is cancelled.

[0455] As an embodiment, it is considered that the first DCI indicating the preamble initial transmission depends on the operation of the first counter in the second random access procedure.

[0456] As a sub - embodiment of the above - mentioned embodiment, it is considered that the first DCI indicating the preamble initial transmission depends on the second random access procedure; the second random access procedure is before the first random access procedure; it is considered that the first DCI indicating the preamble initial transmission depends on the operation of the first counter in the second random access procedure.

[0457] As a sub - embodiment of the above - mentioned embodiment, in response to the existence of the second random access procedure and the operation of the first counter in the second random access procedure, it is considered that the first DCI indicates the preamble initial transmission.

[0458] As a sub - embodiment of the above - mentioned embodiment, if the second random access procedure does not exist or the first counter is not operated in the second random access procedure, it is considered that the first DCI indicating the preamble initial transmission is not executed.

[0459] As a sub - embodiment of the above - mentioned embodiment, the statement that it is considered that the first DCI indicates the preamble initial transmission depends on the operation of the first counter in the second random access procedure means: in response to the operation of the first counter in the second random access procedure, it is considered that the first DCI indicates the preamble initial transmission.

[0460] As a sub - embodiment of the above - mentioned embodiment, the statement that it is considered that the first DCI indicates preamble initial transmission depends on the first counter being operated during the second random access process means that: if the first counter is operated during the second random access process, it is considered that the first DCI indicates preamble initial transmission.

[0461] As a sub - embodiment of the above - mentioned embodiment, the statement that it is considered that the first DCI indicates preamble initial transmission depends on the first counter being operated during the second random access process means that: as long as the first counter is operated during the second random access process, it is considered that the first DCI indicates preamble initial transmission.

[0462] As a sub - embodiment of the above - mentioned embodiment, the first counter being operated means that the first counter is executed.

[0463] As a sub - embodiment of the above - mentioned embodiment, the first counter being operated means that the first counter is changed.

[0464] As a sub - embodiment of the above - mentioned embodiment, the first counter being operated means that the first counter is incremented by 1.

[0465] As a sub - embodiment of the above - mentioned embodiment, the first counter being operated means that the first counter is set to 1.

[0466] As a sub - embodiment of the above - mentioned embodiment, the first counter being operated means that the first counter is incremented by 1, or the first counter is set to 1.

[0467] As an embodiment, the statement that it is considered that the first DCI indicates preamble initial transmission depends on the first counter being operated after the last preamble transmission.

[0468] As a sub - embodiment of the above - mentioned embodiment, in response to the first counter being operated after the last preamble transmission, it is considered that the first DCI indicates preamble initial transmission.

[0469] As a sub - embodiment of the above - mentioned embodiment, if the first counter is not operated after the last preamble transmission, it is considered that the statement that the first DCI indicates preamble initial transmission is not executed.

[0470] As a sub - embodiment of the above - mentioned embodiment, the view that the first DCI indicating a preamble initial transmission depends on the first counter being operated after the last preamble transmission means that: in response to the first counter being operated after the last preamble transmission, it is considered that the first DCI indicates a preamble initial transmission.

[0471] As a sub - embodiment of the above - mentioned embodiment, the view that the first DCI indicating a preamble initial transmission depends on the first counter being operated after the last preamble transmission means that: if the first counter is operated after the last preamble transmission, it is considered that the first DCI indicates a preamble initial transmission.

[0472] As a sub - embodiment of the above - mentioned embodiment, the view that the first DCI indicating a preamble initial transmission depends on the first counter being operated after the last preamble transmission means that: as long as the first counter is operated after the last preamble transmission, it is considered that the first DCI indicates a preamble initial transmission.

[0473] As a sub - embodiment of the above - mentioned embodiment, the first counter being operated means that the first counter is executed.

[0474] As a sub - embodiment of the above - mentioned embodiment, the first counter being operated means that the first counter is changed.

[0475] As a sub - embodiment of the above - mentioned embodiment, the first counter being operated means that the first counter is incremented by 1.

[0476] As a sub - embodiment of the above - mentioned embodiment, the first counter being operated means that the first counter is set to 1.

[0477] As a sub - embodiment of the above - mentioned embodiment, the first counter being operated means that the first counter is incremented by 1, or the first counter is set to 1.

[0478] As a sub - embodiment of the above - mentioned embodiment, the operation of the first counter is triggered by the first MAC entity being reset.

[0479] As a sub - embodiment of the above - mentioned embodiment, the operation of the first counter is triggered by an RRC configuration change.

[0480] As a sub - embodiment of the above - mentioned embodiment, the operation of the first counter is triggered by the random access procedure being completed.

[0481] As a sub - embodiment of the above - mentioned embodiment, the first counter is operated during the random access procedure.

[0482] As a sub - embodiment of the above - mentioned embodiment, the first counter is operated outside the random access procedure.

[0483] As an embodiment, it is considered that the first DCI indicates that the preamble initial transmission depends on either the existence of a second random access procedure or the first counter being operated after the last preamble transmission.

[0484] As a sub - embodiment of the above - mentioned embodiment, in response to either the existence of a second random access procedure or the first counter being operated after the last preamble transmission, it is considered that the first DCI indicates the preamble initial transmission.

[0485] As an embodiment, it is considered that the first DCI indicates that the preamble initial transmission depends on either the preamble being cancelled in the second random access procedure or the first counter being operated after the last preamble transmission.

[0486] As a sub - embodiment of the above - mentioned embodiment, in response to either the preamble being cancelled in the second random access procedure or the first counter being operated after the last preamble transmission, it is considered that the first DCI indicates the preamble initial transmission.

[0487] As an embodiment, it is considered that the first DCI indicates that the preamble initial transmission depends on the preamble being cancelled in the second random access procedure.

[0488] As a sub - embodiment of the above - mentioned embodiment, it is considered that the first DCI indicates that the preamble initial transmission depends on a second random access procedure; the second random access procedure is before the first random access procedure; it is considered that the first DCI indicates that the preamble initial transmission depends on the preamble being cancelled in the second random access procedure.

[0489] As a sub - embodiment of the above - mentioned embodiment, in response to the existence of the second random access procedure and the preamble being cancelled in the second random access procedure, it is considered that the first DCI indicates the preamble initial transmission.

[0490] As a sub - embodiment of the above - mentioned embodiment, if the second random access procedure does not exist or the preamble in the second random access procedure is not cancelled from being transmitted, it is considered that the first DCI indicates that the preamble initial transmission is not to be executed.

[0491] As a sub - embodiment of the above - mentioned embodiment, as the second random access procedure exists, and in response to the first counter being operated during the second random access procedure or the preamble in the second random access procedure being cancelled from being transmitted, it is considered that the first DCI indicates the preamble initial transmission.

[0492] As a sub - embodiment of the above - mentioned embodiment, if the second random access procedure does not exist, or the first counter is not operated during the second random access procedure and the preamble in the second random access procedure is not cancelled from being transmitted, it is considered that the first DCI indicates that the preamble initial transmission is not to be executed.

[0493] As a sub - embodiment of the above - mentioned embodiment, the consideration that the first DCI indicates the preamble initial transmission depends on the preamble in the second random access procedure being cancelled from being transmitted includes: in response to the preamble in the second random access procedure being cancelled from being transmitted, it is considered that the first DCI indicates the preamble initial transmission.

[0494] As a sub - embodiment of the above - mentioned embodiment, the consideration that the first DCI indicates the preamble initial transmission depends on the preamble in the second random access procedure being cancelled from being transmitted includes: the preamble in the second random access procedure being cancelled from being transmitted triggers the consideration that the first DCI indicates the preamble initial transmission.

[0495] As a sub - embodiment of the above - mentioned embodiment, the consideration that the first DCI indicates the preamble initial transmission depends on the preamble in the second random access procedure being cancelled from being transmitted includes: if the preamble in the second random access procedure is cancelled from being transmitted, it is considered that the first DCI indicates the preamble initial transmission.

[0496] As a sub - embodiment of the above - mentioned embodiment, the preamble in the second random access procedure being cancelled from being transmitted is triggered by time - frequency resource overlap.

[0497] As a sub - embodiment of the above - mentioned embodiment, the preamble in the second random access procedure being cancelled from being transmitted is triggered by time - frequency resource overlap and time - frequency resource priority.

[0498] As a sub - embodiment of the above - mentioned embodiment, the transmission of the preamble in the second random access procedure is cancelled and triggered by the physical layer.

[0499] As a sub - embodiment of the above - mentioned embodiment, the transmission of the preamble in the second random access procedure is cancelled and triggered by a higher layer.

[0500] As a sub - embodiment of the above - mentioned embodiment, the transmission of the preamble in the second random access procedure is cancelled and triggered by a MAC entity.

[0501] As a sub - embodiment of the above - mentioned embodiment, the transmission of the preamble in the second random access procedure is cancelled and triggered by a MAC entity reset.

[0502] As a sub - embodiment of the above - mentioned embodiment, the transmission of the preamble in the second random access procedure is cancelled and triggered by other procedures of a MAC entity.

[0503] As a sub - embodiment of the above - mentioned embodiment, the meaning that the preamble in the second random access procedure is cancelled from being sent includes: the preamble is not sent during the random access preamble transmission procedure in the second random access procedure.

[0504] As a sub - embodiment of the above - mentioned embodiment, the meaning that the preamble in the second random access procedure is cancelled from being sent includes: the preamble is not sent at the physical layer in the second random access procedure.

[0505] As a sub - embodiment of the above - mentioned embodiment, the meaning that the preamble in the second random access procedure is cancelled from being sent includes: the preamble is not sent at the corresponding PRACH occasion in the second random access procedure.

[0506] As a sub - embodiment of the above - mentioned embodiment, the meaning that the preamble in the second random access procedure is cancelled from being sent includes: the first node U01 receives a notification from a lower layer at the MAC sub - layer, and the notification indicates that the preamble in the second random access procedure is cancelled from being sent.

[0507] As a sub - embodiment of the above - mentioned sub - embodiment, in response to the preamble in the second random access procedure being cancelled from being sent, the physical layer of the first node U01 sends the notification to a higher layer of the first node U01.

[0508] As a sub - embodiment of the above - mentioned embodiment, the one notification is a notification to suspend the first counter.

[0509] As a sub - embodiment of the above - mentioned embodiment, the one notification is an LBT failure indication for preamble transmission in the second random access procedure.

[0510] As a sub - embodiment of the above - mentioned embodiment, the one notification is a notification that the preamble in the second random access procedure is cancelled from being sent.

[0511] As a sub - embodiment of the above - mentioned embodiment, the one notification is an indication.

[0512] As a sub - embodiment of the above - mentioned embodiment, the one notification is a message.

[0513] As a sub - embodiment of the above - mentioned embodiment, the one notification is an information.

[0514] As a sub - embodiment of the above - mentioned embodiment, the one notification is cross - layer.

[0515] As a sub - embodiment of the above - mentioned embodiment, the one notification depends on UE implementation.

[0516] As a sub - embodiment of the above - mentioned embodiment, the one notification is configured by the network.

[0517] As a sub - embodiment of the above - mentioned embodiment, the meaning that the preamble in the second random access procedure is cancelled from being sent includes at least one of the following: the first node U01 receives a notification to suspend the first counter from a lower layer at the MAC sub - layer, or the first node U01 receives a notification that the preamble in the second random access procedure is cancelled from being sent from a lower layer at the MAC sub - layer, or the MAC sub - layer of the first node U01 indicates that the preamble in the second random access procedure is cancelled from being sent.

[0518] As a sub - embodiment of the above - mentioned embodiment, the meaning that the preamble in the second random access process is cancelled from being sent includes: the first node U01 receives a notification from a lower layer at the MAC sub - layer to pause the first counter, or, the first node U01 receives a notification from a lower layer at the MAC sub - layer that the preamble in the second random access process is cancelled from being sent, or, the MAC sub - layer of the first node U01 indicates that the preamble in the second random access process is cancelled from being sent, or, the first node U01 receives a Listen - Before - Talk (LBT) failure indication from a lower layer for the preamble transmission in the second random access process, at least one of the four.

[0519] As an embodiment, maintaining the first counter does not include setting the first counter to 1; maintaining the first counter does not include setting the first counter to 1 depending on the last preamble transmission on the second cell and the last preamble transmission being initiated by the second DCI.

[0520] As a sub - embodiment of the above - mentioned embodiment, in response to the last preamble transmission being on the second cell and the last preamble transmission being initiated by the second DCI, setting the first counter to 1 is not performed.

[0521] As a sub - embodiment of the above - mentioned embodiment, receive a first DCI on a first cell; in response to receiving the first DCI, perform a first random access process on a second cell; wherein, the first DCI indicates the second cell, the first DCI indicates preamble re - transmission; receive a second DCI on the first cell; wherein, the last preamble transmission is on the second cell and the last preamble transmission is initiated by the second DCI; wherein, performing the first random access process includes considering that the first DCI indicates preamble initial transmission and maintaining the first counter, and, maintaining the first counter does not include setting the first counter to 1; maintaining the first counter does not include setting the first counter to 1 depending on the last preamble transmission on the second cell and the last preamble transmission being initiated by the second DCI.

[0522] As an embodiment, maintaining the first counter includes setting the first counter to 1; along with considering that the first DCI indicates preamble initial transmission, set the first counter to 1.

[0523] As a sub - embodiment of the above - mentioned embodiment, the statement "along with the recognition that the first DCI indicates a preamble initial transmission, set the first counter to 1" means that as long as the recognition that the first DCI indicates a preamble initial transmission is executed, setting the first counter to 1 is also executed.

[0524] As a sub - embodiment of the above - mentioned embodiment, the statement "along with the recognition that the first DCI indicates a preamble initial transmission, set the first counter to 1" means that the recognition that the first DCI indicates a preamble initial transmission being executed and setting the first counter to 1 are atomic.

[0525] As a sub - embodiment of the above - mentioned embodiment, set the first counter to 1 before the recognition that the first DCI indicates a preamble initial transmission.

[0526] As a sub - embodiment of the above - mentioned embodiment, set the first counter to 1 after the recognition that the first DCI indicates a preamble initial transmission.

[0527] As a sub - embodiment of the above - mentioned embodiment, receive a first DCI on a first cell; in response to the reception of the first DCI, perform a first random access procedure on a second cell; wherein the first DCI indicates the second cell, and the first DCI indicates a preamble re - transmission; receive a second DCI on the first cell; wherein the previous preamble transmission was on the second cell and the previous preamble transmission was initiated by the second DCI; wherein performing the first random access procedure includes recognizing that the first DCI indicates a preamble initial transmission and maintaining a first counter, and maintaining the first counter includes setting the first counter to 1; along with the recognition that the first DCI indicates a preamble initial transmission, set the first counter to 1.

[0528] As an embodiment, maintaining the first counter includes setting the first counter to 1; maintaining the first counter includes setting the first counter to 1 depending on the recognition that the first DCI indicates a preamble initial transmission.

[0529] As a sub - embodiment of the above - mentioned embodiment, maintaining the first counter includes setting the first counter to 1 depending on the recognition that the first DCI indicates a preamble initial transmission means that in response to the recognition that the first DCI indicates a preamble initial transmission, set the first counter to 1.

[0530] As a sub - embodiment of the above - mentioned embodiment, maintaining the first counter includes setting the first counter to 1 depending on the belief that the first DCI indicates a preamble initial transmission, which means: if the belief that the first DCI indicates a preamble initial transmission, set the first counter to 1.

[0531] As a sub - embodiment of the above - mentioned embodiment, maintaining the first counter includes setting the first counter to 1 depending on the belief that the first DCI indicates a preamble initial transmission, which means: as long as the belief that the first DCI indicates a preamble initial transmission, set the first counter to 1.

[0532] As a sub - embodiment of the above - mentioned embodiment, after the belief that the first DCI indicates a preamble initial transmission, in response to the belief that the first DCI indicates a preamble initial transmission, set the first counter to 1.

[0533] As a sub - embodiment of the above - mentioned embodiment, receive a first DCI on a first cell; in response to the reception of the first DCI, perform a first random access procedure on a second cell; wherein, the first DCI indicates the second cell, and the first DCI indicates a preamble re - transmission; receive a second DCI on the first cell; wherein, the previous preamble transmission was on the second cell and the previous preamble transmission was initiated by the second DCI; wherein, performing the first random access procedure includes believing that the first DCI indicates a preamble initial transmission and maintaining a first counter, and maintaining the first counter includes setting the first counter to 1; maintaining the first counter includes setting the first counter to 1 depending on the belief that the first DCI indicates a preamble initial transmission.

[0534] As an embodiment, maintaining the first counter does not include incrementing the first counter by 1; maintaining the first counter does not include incrementing the first counter by 1 depending on the belief that the first DCI indicates a preamble initial transmission.

[0535] As a sub - embodiment of the above - mentioned embodiment, in response to the belief that the first DCI indicates a preamble initial transmission, regardless of whether the SSB indicated by the first DCI is the same as the SSB corresponding to the previous preamble transmission, maintaining the first counter does not include incrementing the first counter by 1.

[0536] As a sub - embodiment of the above - mentioned embodiment, the above - mentioned method avoids incrementing the first counter by believing that the first DCI indicates a preamble initial transmission.

[0537] As a sub - embodiment of the above - mentioned embodiment, the maintaining the first counter without incrementing the first counter means that during the first random access procedure, the first counter is not incremented.

[0538] As a sub - embodiment of the above - mentioned embodiment, the maintaining the first counter without incrementing the first counter means that during the random access preamble transmission procedure of the first random access procedure, the first counter is not incremented.

[0539] As a sub - embodiment of the above - mentioned embodiment, the maintaining the first counter without incrementing the first counter depending on the belief that the first DCI indicates a preamble initial transmission means that in response to the belief that the first DCI indicates a preamble initial transmission, the incrementing of the first counter is not performed.

[0540] As a sub - embodiment of the above - mentioned embodiment, the maintaining the first counter without incrementing the first counter depending on the belief that the first DCI indicates a preamble initial transmission means that if the belief that the first DCI indicates a preamble initial transmission holds, the incrementing of the first counter is not performed.

[0541] As a sub - embodiment of the above - mentioned embodiment, the maintaining the first counter without incrementing the first counter depending on the belief that the first DCI indicates a preamble initial transmission means that as long as the belief that the first DCI indicates a preamble initial transmission holds, the incrementing of the first counter is not performed.

[0542] As a sub - embodiment of the above - mentioned embodiment, a first DCI is received on a first cell; in response to the reception of the first DCI, a first random access procedure is performed on a second cell; wherein the first DCI indicates the second cell and the first DCI indicates a preamble re - transmission; a second DCI is received on the first cell; wherein the previous preamble transmission was on the second cell and the previous preamble transmission was initiated by the second DCI; wherein the performing the first random access procedure includes believing that the first DCI indicates a preamble initial transmission and maintaining a first counter, and the maintaining the first counter does not include incrementing the first counter; the maintaining the first counter does not include incrementing the first counter depending on the belief that the first DCI indicates a preamble initial transmission.

[0543] The maintaining the first counter does not include incrementing the first counter.

[0544] The maintaining the first counter includes incrementing the first counter by 1.

[0545] As an embodiment, as a sub - embodiment of the above - mentioned embodiment, before incrementing the first counter by 1, it is considered that the first DCI indicates a preamble initial transmission.

[0546] As an embodiment, as a sub - embodiment of the above - mentioned embodiment, after incrementing the first counter by 1, it is considered that the first DCI indicates a preamble initial transmission.

[0547] As an embodiment, as a sub - embodiment of the above - mentioned embodiment, while incrementing the first counter by 1, it is considered that the first DCI indicates a preamble initial transmission.

[0548] Example 6

[0549] Embodiment 6 exemplifies a structural block diagram of a processing device in a first node according to an embodiment of the present application; as shown in the appendix Figure 6 shown. In the appendix Figure 6 In it, the processing device 600 in the first node includes a first processor 601.

[0550] The first processor 601 receives a first DCI on a first cell; in response to the reception of the first DCI, performs a first random access procedure on a second cell; wherein, the first DCI indicates the second cell, and the first DCI indicates a preamble re - transmission;

[0551] In Embodiment 6, performing the first random access procedure includes considering that the first DCI indicates a preamble initial transmission and maintaining a first counter.

[0552] As an embodiment, the first processor 601 receives a second DCI on the first cell; wherein, the last preamble transmission is on the second cell and the last preamble transmission is initiated by the second DCI.

[0553] As an embodiment, maintaining the first counter does not include setting the first counter to 1; maintaining the first counter does not include setting the first counter to 1 depending on the last preamble transmission being on the second cell and the last preamble transmission being initiated by the second DCI.

[0554] As an example, the maintaining the first counter includes setting the first counter to 1; the maintaining the first counter includes setting the first counter to 1 depending on the belief that the first DCI indicates a preamble initial transmission.

[0555] As an example, the maintaining the first counter does not include incrementing the first counter by 1; the maintaining the first counter does not include incrementing the first counter by 1 depending on the belief that the first DCI indicates a preamble initial transmission.

[0556] As an example, the belief that the first DCI indicates a preamble initial transmission depends on a second random access procedure; the second random access procedure is before the first random access procedure.

[0557] As an example, the belief that the first DCI indicates a preamble initial transmission depends on the first counter being operated during the second random access procedure.

[0558] As an example, the belief that the first DCI indicates a preamble initial transmission depends on the preamble being cancelled from transmission during the second random access procedure.

[0559] As an example, the first processor 601 includes a first receiver.

[0560] As an example, the first processor 601 includes a first transmitter.

[0561] As an example, the first processor 601 includes a first receiver and a first transmitter.

[0562] As an example, the first receiver includes at least one of the antenna 452 or the receiver 454 or the multi-antenna reception processor 458 or the reception processor 456 or the controller / processor 459 or the memory 460 or the data source 467 attached in this application. Figure 4

[0563] As an example, the first receiver includes at least the antenna 452 and the receiver 454 attached in this application. Figure 4

[0564] As an example, the first transmitter includes at least one of the antenna 452 or the transmitter 454 or the multi-antenna transmission processor 457 or the transmission processor 468 or the controller / processor 459 or the memory 460 or the data source 467 attached in this application. Figure 4

[0565] As an example, the first transmitter includes at least the antenna 452 and the transmitter 454 attached in this application. Figure 4At least antenna 452 and transmitter 454 therein.

[0566] Example 7

[0567] Example 7 illustrates a structural block diagram of a processing device in a second node according to an embodiment of the present application; as shown in the appendix Figure 7 As shown. In the appendix Figure 7 In, the processing device 700 in the second node includes a second transmitter 701.

[0568] The second transmitter 701 transmits a first DCI on a first cell; wherein, in response to the reception of the first DCI, the receiver of the first DCI performs a first random access procedure on a second cell; the first DCI indicates the second cell, and the first DCI indicates preamble retransmission;

[0569] In Example 7, the performing of the first random access procedure includes assuming that the first DCI indicates preamble initial transmission and maintaining a first counter.

[0570] As an embodiment, the second transmitter transmits a second DCI on the first cell; wherein the last preamble transmission is on the second cell and the last preamble transmission is initiated by the second DCI.

[0571] As an embodiment, the maintaining of the first counter does not include setting the first counter to 1; the maintaining of the first counter does not include setting the first counter to 1 depending on the last preamble transmission being on the second cell and the last preamble transmission being initiated by the second DCI.

[0572] As an embodiment, the maintaining of the first counter includes setting the first counter to 1; the maintaining of the first counter includes setting the first counter to 1 depending on the assumption that the first DCI indicates preamble initial transmission.

[0573] As an embodiment, the maintaining of the first counter does not include incrementing the first counter by 1; the maintaining of the first counter does not include incrementing the first counter by 1 depending on the assumption that the first DCI indicates preamble initial transmission.

[0574] As an embodiment, the assumption that the first DCI indicates preamble initial transmission depends on a second random access procedure; the second random access procedure is before the first random access procedure.

[0575] As an example, it is considered that the first DCI indicating the preamble initial transmission depends on the operation of the first counter in the second random access procedure.

[0576] As an example, it is considered that the first DCI indicating the preamble initial transmission depends on the cancellation of the preamble transmission in the second random access procedure.

[0577] As an example, the second transmitter 701 includes at least one of the antenna 420, the transmitter 418, the multi-antenna transmission processor 471, the transmission processor 416, the controller / processor 475, or the memory 476 attached to this application Figure 4

[0578] As an example, the second transmitter 701 includes at least the antenna 420 and the transmitter 418 attached to this application Figure 4

[0579] Those of ordinary skill in the art can understand that all or part of the steps in the above method can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a hard disk, or an optical disc, etc. Optionally, all or part of the steps in the above embodiments can also be implemented using one or more integrated circuits. Correspondingly, each module unit in the above embodiments can be implemented in a hardware form or in the form of a software functional module. This application is not limited to any specific form of the combination of software and hardware. The user equipment, terminal, and UE in this application include, but are not limited to, drones, communication modules on drones, remote control airplanes, aircraft, small airplanes, mobile phones, tablet computers, notebooks, vehicle-mounted communication devices, wireless sensors, network cards, Internet of Things terminals, RFID terminals, NB-IOT terminals, MTC (Machine Type Communication) terminals, eMTC (enhanced MTC) terminals, data cards, network cards, vehicle-mounted communication devices, 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.

[0580] 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 modifications, equivalent replacements, improvements, 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, Comprising: A first processor, receiving a first DCI on a first cell; In response to the reception of the first DCI, performing a first random access procedure on a second cell; wherein, the first DCI indicates the second cell, and the first DCI indicates preamble retransmission; Wherein, performing the first random access procedure includes assuming that the first DCI indicates preamble initial transmission and maintaining a first counter.

2. The first node according to claim 1, wherein Comprising: The first processor, receiving a second DCI on the first cell; Wherein, the previous preamble transmission is on the second cell and the previous preamble transmission is initiated by the second DCI.

3. The first node according to claim 2, wherein Maintaining the first counter does not include setting the first counter to 1; maintaining the first counter does not include setting the first counter to 1 depending on the previous preamble transmission being on the second cell and the previous preamble transmission being initiated by the second DCI.

4. The first node according to claim 1 or 2, characterized in that, Maintaining the first counter includes setting the first counter to 1; maintaining the first counter includes setting the first counter to 1 depending on assuming that the first DCI indicates preamble initial transmission.

5. The first node according to any one of claims 1 to 4, characterized in that Maintaining the first counter does not include incrementing the first counter by 1; maintaining the first counter does not include incrementing the first counter by 1 depending on assuming that the first DCI indicates preamble initial transmission.

6. The first node according to any one of claims 1 to 5, characterized in that, Assuming that the first DCI indicates preamble initial transmission depends on a second random access procedure; the second random access procedure is before the first random access procedure.

7. The first node according to claim 6, characterized in that Assuming that the first DCI indicates preamble initial transmission depends on the first counter being operated during the second random access procedure.

8. The first node according to claim 6 or 7, characterized in that, Assuming that the first DCI indicates preamble initial transmission depends on the preamble being cancelled from transmission during the second random access procedure.

9. A method used in a first node for wireless communication, characterized in that, Comprising: Receiving a first DCI on a first cell; In response to the reception of the first DCI, performing a first random access procedure on a second cell; wherein, the first DCI indicates the second cell, and the first DCI indicates preamble retransmission; Wherein, performing the first random access procedure includes assuming that the first DCI indicates preamble initial transmission and maintaining a first counter.

10. A second node used for wireless communication, characterized in that, Comprising: A second transmitter, transmitting a first DCI on a first cell; wherein, in response to the reception of the first DCI, the receiver of the first DCI performs a first random access procedure on a second cell; the first DCI indicates the second cell, and the first DCI indicates preamble retransmission; Wherein, performing the first random access procedure includes assuming that the first DCI indicates preamble initial transmission and maintaining a first counter.

11. A method in a second node used for wireless communication, characterized in that, Comprising: Transmit a first DCI on a first cell; wherein, in response to the reception of the first DCI, a receiver of the first DCI performs a first random access procedure on a second cell; the first DCI indicates the second cell, and the first DCI indicates a preamble retransmission; Wherein, performing the first random access procedure includes assuming that the first DCI indicates a preamble initial transmission and maintaining a first counter.

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