A method and device in a communication node for wireless communication

Abstract

The present application discloses a method and apparatus in a communication node for wireless communication. The communication node sends a first sequence; receives first information, and the first information is used to determine X alternative time lengths; sends a second sequence and determines whether to send a second wireless signal; the time interval between the sending time of the first sequence and the sending time of the second sequence is not less than the target time length; the first time length is equal to one of the X alternative time lengths, and the target time length is not greater than the first time length; if the first time length is greater than 0, the first communication node device randomly selects the target time length from the interval of 0 to the first time length; if the first time length is equal to 0, the target time length is equal to 0; whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths. The present application improves random access performance.

Description

[0001] This application is a divisional application of the following original application:

[0002] -- Filing date of original application: January 11, 2019

[0003] --Application number of the original application: 201910027128.X

[0004] --Title of the invention of the original application: A method and apparatus in a communication node for wireless communication Technical Field

[0005] The present application relates to a transmission method and device in a wireless communication system, and in particular to a transmission scheme and device for random access. Background Art

[0006] In the future, the application scenarios of wireless communication systems will become more and more diversified, and different application scenarios will put forward different performance requirements for the system. In order to meet the different performance requirements of various application scenarios, the 3GPP (3rd Generation Partner Project) RAN (Radio Access Network) #72 plenary meeting decided to study the new radio (NR) (or 5G), and the WI (Work Item) of the new radio (NR) was passed at the 3GPP RAN #75 plenary meeting, and the standardization work on NR began.

[0007] In order to adapt to various application scenarios and meet different needs, the 3GPP RAN#76 plenary meeting also passed the research project of non-orthogonal multiple access (NoMA) under NR. This research project started in the R16 version, and the WI was launched after the SI ended to standardize related technologies. As a follow-up to the NoMA research project, the WI of two-step random access (2-step RACH) under NR was passed at the 3GPP RAN#82 plenary meeting. Summary of the invention

[0008] For user equipment (UE) of R16 and later versions, both two-step random access and traditional four-step random access can be used. And according to the requirements of the WI of two-step random access, the user equipment can switch between two-step random access and four-step random access or fall back from two-step random access to four-step random access. Since the application scenarios of two-step random access and four-step random access are different, the performance requirements for two-step random access and four-step random access may also be different, such as different delay requirements, different collision probability requirements, different capacity requirements, etc.

[0009] The present application provides a solution for different requirements of 2-step random access and 4-step random access. It should be noted that, in the absence of conflict, the embodiments of the base station device of the present application and the features in the embodiments can be applied to the user equipment, and vice versa. Further, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other.

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

[0011] Send the first sequence;

[0012] receiving first information, where the first information is used to determine X candidate time lengths, where X is a positive integer greater than 1;

[0013] sending a second sequence and determining whether to send a second wireless signal;

[0014] Among them, the time interval between the sending time of the first sequence and the sending time of the second sequence is not less than the target time length; the first time length is equal to one of the X alternative time lengths, and the target time length is not greater than the first time length; if the first time length is greater than 0, the first communication node device randomly selects the target time length from the interval from 0 to the first time length; if the first time length is equal to 0, the target time length is equal to 0; whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths.

[0015] As an embodiment, in the present application, the first time length is determined by whether the second wireless signal is sent to implement different random access fallback designs for 2-step random access and 4-step random access, thereby meeting the different performance requirements of 2-step random access and 4-step random access.

[0016] As an embodiment, the first information is used to determine X alternative time lengths to achieve different random access backoff times for 2-step random access and 4-step random access through a random access feedback (RAR or MsgB), thereby supporting smooth switching between 2-step random access and 4-step random access.

[0017] According to one aspect of the present application, the above method is characterized in that a first wireless signal is also sent, and the first sequence is used to indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal.

[0018] According to one aspect of the present application, the above method is characterized in that the X alternative time lengths belong to X time length sets respectively, and the first information is used to determine the X alternative time lengths from the X time length sets respectively; any one of the X time length sets includes a positive integer number of alternative time lengths greater than 1.

[0019] According to one aspect of the present application, the above method is characterized in that the air interface resource occupied by the second sequence is a first air interface resource block, the first air interface resource block belongs to a first air interface resource group, the first air interface resource group is one of Y air interface resource groups, and Y is a positive integer greater than 1; whether the second wireless signal is sent is used to determine the first air interface resource group among the Y air interface resource groups.

[0020] As an embodiment, different PRACH resources are used for 2-step random access and 4-step random access, thereby achieving independent control of indicators such as collision, capacity and delay of 2-step random access and 4-step random access, thereby meeting different scenario requirements.

[0021] According to one aspect of the present application, the above method is characterized in that a second wireless signal is also sent; the second sequence is used to indicate at least one of the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and the redundant version adopted by the second wireless signal.

[0022] According to one aspect of the present application, the above method is characterized in that the second time length is equal to an alternative time length other than the first time length among the X alternative time lengths, and the first time length is equal to the product of the second time length and a first factor; the first factor is fixed, or the first factor is configurable.

[0023] As an embodiment, by introducing the first factor, proportional scaling between the backoff value for 2-step random access and the backoff value for 4-step random access is achieved, so that the backoff range can be flexibly controlled according to capacity requirements, congestion conditions, etc., thereby optimizing system performance.

[0024] According to one aspect of the present application, the above method is characterized in that second information is also received, and the first information and the second information are used to determine the X candidate time lengths respectively, and X is equal to 2.

[0025] The present application discloses a method in a second communication node in wireless communication, characterized by comprising:

[0026] receiving a first sequence;

[0027] Sending first information, where the first information is used to determine X candidate time lengths, where X is a positive integer greater than 1;

[0028] receiving a second sequence and determining whether a second wireless signal is transmitted;

[0029] Among them, the time interval between the sending time of the first sequence and the sending time of the second sequence is not less than the target time length; the first time length is equal to one of the X alternative time lengths, and the target time length is not greater than the first time length; if the first time length is greater than 0, the sender of the first sequence randomly selects the target time length from the interval of 0 to the first time length; if the first time length is equal to 0, the target time length is equal to 0; whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths.

[0030] According to one aspect of the present application, the above method is characterized in that a first wireless signal is also received, and the first sequence is used to indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal.

[0031] According to one aspect of the present application, the above method is characterized in that the X alternative time lengths belong to X time length sets respectively, and the first information is used to determine the X alternative time lengths from the X time length sets respectively; any one of the X time length sets includes a positive integer number of alternative time lengths greater than 1.

[0032] According to one aspect of the present application, the above method is characterized in that the air interface resource occupied by the second sequence is a first air interface resource block, the first air interface resource block belongs to a first air interface resource group, the first air interface resource group is one of Y air interface resource groups, and Y is a positive integer greater than 1; whether the second wireless signal is sent is used to determine the first air interface resource group among the Y air interface resource groups.

[0033] According to one aspect of the present application, the above method is characterized in that a second wireless signal is also received; the second sequence is used to indicate at least one of the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and the redundant version adopted by the second wireless signal.

[0034] According to one aspect of the present application, the above method is characterized in that the second time length is equal to an alternative time length other than the first time length among the X alternative time lengths, and the first time length is equal to the product of the second time length and a first factor; the first factor is fixed, or the first factor is configurable.

[0035] According to one aspect of the present application, the above method is characterized in that second information is also sent, and the first information and the second information are used to determine the X candidate time lengths respectively, and X is equal to 2.

[0036] The present application discloses a first communication node device for wireless communication, characterized in that it includes:

[0037] A first transmitter sends a first sequence;

[0038] A first receiver receives first information, wherein the first information is used to determine X candidate time lengths, where X is a positive integer greater than 1;

[0039] a second transmitter that transmits a second sequence and determines whether to transmit a second wireless signal;

[0040] Among them, the time interval between the sending time of the first sequence and the sending time of the second sequence is not less than the target time length; the first time length is equal to one of the X alternative time lengths, and the target time length is not greater than the first time length; if the first time length is greater than 0, the first communication node device randomly selects the target time length from the interval from 0 to the first time length; if the first time length is equal to 0, the target time length is equal to 0; whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths.

[0041] The present application discloses a second communication node device for wireless communication, characterized in that it includes:

[0042] A second receiver receives the first sequence;

[0043] A third transmitter sends first information, where the first information is used to determine X candidate time lengths, where X is a positive integer greater than 1;

[0044] a third receiver that receives the second sequence and determines whether a second wireless signal is transmitted;

[0045] Among them, the time interval between the sending time of the first sequence and the sending time of the second sequence is not less than the target time length; the first time length is equal to one of the X alternative time lengths, and the target time length is not greater than the first time length; if the first time length is greater than 0, the sender of the first sequence randomly selects the target time length from the interval of 0 to the first time length; if the first time length is equal to 0, the target time length is equal to 0; whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths.

[0046] As an embodiment, the present application includes the following technical advantages:

[0047] - The method in the present application is used to implement different random access fallback designs for 2-step random access and 4-step random access, thereby meeting different performance requirements of 2-step random access and 4-step random access.

[0048] - The method in the present application is used to obtain different random access backoff times for 2-step random access and 4-step random access through a random access feedback (RAR or MsgB), thereby supporting smooth switching between 2-step random access and 4-step random access.

[0049] -The method in this application is used to achieve proportional scaling between the backoff value for 2-step random access and the backoff value for 4-step random access, so that the backoff range can be flexibly controlled according to multiple aspects such as capacity requirements and congestion conditions to optimize system performance.

[0050] -The method in this application uses different PRACH resources for 2-step random access and 4-step random access, thereby achieving independent control of indicators such as collision, capacity and delay of 2-step random access and 4-step random access, thereby meeting different scenario requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0052] Figure 1 A flowchart showing a first sequence, first information, and a second sequence according to an embodiment of the present application is shown;

[0053] Figure 2 A schematic diagram of a network architecture according to an embodiment of the present application is shown;

[0054] Figure 3 A schematic diagram showing a wireless protocol architecture of a user plane and a control plane according to an embodiment of the present application is shown;

[0055] Figure 4 A schematic diagram showing a first communication node and a second communication node according to an embodiment of the present application is shown;

[0056] Figure 5 A wireless signal transmission flow chart according to an embodiment of the present application is shown;

[0057] Figure 6 A wireless signal transmission flow chart according to another embodiment of the present application is shown;

[0058] Figure 7 A schematic diagram showing a relationship between a target time length and a first time length according to an embodiment of the present application;

[0059] Figure 8 A schematic diagram showing a set of X time lengths according to an embodiment of the present application is shown;

[0060] Fig. 9 A schematic diagram showing Y air interface resource groups according to an embodiment of the present application is shown;

[0061] Fig.10 A schematic diagram showing a relationship between a first time length and a second time length according to an embodiment of the present application;

[0062] Fig.11 A schematic diagram showing a relationship between first information and second information according to an embodiment of the present application;

[0063] Fig.12 A structural block diagram of a processing device in a first communication node device according to an embodiment of the present application is shown;

[0064] Fig.13 A structural block diagram of a processing device in a second communication node device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0065] The technical solution of the present application will be further described in detail below in conjunction with the accompanying drawings. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other.

[0066] Example 1

[0067] Embodiment 1 illustrates a flowchart of a first sequence, a first message, and a second sequence according to an embodiment of the present application, as shown in the attached Figure 1 Attached Figure 1 In the illustrated diagram 100 , each box represents a step. In particular, the order of the steps in the boxes does not represent a specific temporal relationship between the steps.

[0068] In Example 1, the first communication node in the present application sends a first sequence in step 101; receives first information in step 102, and the first information is used to determine X alternative time lengths, where X is a positive integer greater than 1; sends a second sequence in step 103 and determines whether to send a second wireless signal; wherein the time interval between the sending time of the first sequence and the sending time of the second sequence is not less than the target time length; the first time length is equal to one of the X alternative time lengths, and the target time length is not greater than the first time length; if the first time length is greater than 0, the first communication node randomly selects the target time length from the interval of 0 to the first time length; if the first time length is equal to 0, the target time length is equal to 0; whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths.

[0069] As an embodiment, the first communication node device is in an RRC (Radio Resource Control) idle state (RRC_IDLE).

[0070] As an embodiment, the first communication node device is in an RRC (Radio Resource Control) connection state (RRC_CONNECTED).

[0071] As an embodiment, the first communication node device is in an RRC (Radio Resource Control) inactive state (RRC_INACTIVE).

[0072] As an embodiment, the first sequence is a preamble sequence.

[0073] As an embodiment, the first sequence is a pseudo-random sequence.

[0074] As an embodiment, the first sequence is a Zadoff-Chu (ZC) sequence.

[0075] As an embodiment, the first sequence includes all elements of a Zadoff-Chu (ZC) sequence.

[0076] As an embodiment, the first sequence only includes some elements of a Zadoff-Chu (ZC) sequence.

[0077] As an embodiment, the first sequence is a Zadoff-Chu (ZC) sequence with a length of 839.

[0078] As an embodiment, the first sequence is a Zadoff-Chu (ZC) sequence with a length of 139.

[0079] As an embodiment, all elements in the first sequence are the same.

[0080] As an embodiment, there are two different elements in the first sequence.

[0081] As an embodiment, all elements in the first sequence are 1.

[0082] As an embodiment, the first sequence includes a CP (Cyclic Prefix).

[0083] As an embodiment, the first sequence is transmitted via PRACH (Physical Random Access Channel).

[0084] As an embodiment, the first sequence is a preamble sequence (Preamble) in a 2-step random access.

[0085] As an embodiment, the first sequence is a preamble sequence (Preamble) in a 4-step random access.

[0086] As an embodiment, the first sequence is a preamble sequence (Preamble) in MsgA (Message A) in a 2-step random access.

[0087] As an embodiment, the first information is transmitted via high-layer signaling.

[0088] As an embodiment, the first information is transmitted via physical layer signaling.

[0089] As an embodiment, the first information includes all or part of a high-layer signaling.

[0090] As an embodiment, the first information includes all or part of a physical layer signaling.

[0091] As an embodiment, the first information includes all or part of an IE (Information Element) in an RRC (Radio Resource Control) signaling.

[0092] As an embodiment, the first information includes all or part of a field in an IE (Information Element) in an RRC (Radio Resource Control) signaling.

[0093] As an embodiment, the first information includes all or part of a field in a MAC (Medium Access Control) layer signaling.

[0094] As an embodiment, the first information includes all or part of a MAC (Medium Access Control) CE (Control Element).

[0095] As an embodiment, the first information includes all or part of a MAC (Medium Access Control) header.

[0096] As an embodiment, the first information includes all or part of a MAC payload in a RAR (Random Access Response).

[0097] As an embodiment, the first information includes all or part of a MAC PDU (Protocol Data Unit) in a RAR (Random Access Response).

[0098] As an embodiment, the first information includes all or part of a subheader in a RAR (Random Access Response).

[0099] As an embodiment, the first information includes all or part of a MAC CE (Control Element) in a RAR (Random Access Response).

[0100] As an embodiment, the first information includes all or part of a Msg4 (message 4).

[0101] As an embodiment, the first information includes all or part of Msg4 in a 4-step random access.

[0102] As an embodiment, the first information includes all or part of MsgB (message B) in two-step random access (2-Step RACH).

[0103] As an embodiment, the first information includes all or part of the MAC payload in MsgB (message B) in two-step random access (2-Step RACH).

[0104] As an embodiment, the first information includes all or part of the MAC PDU (Protocol Data Unit) in MsgB (Message B) in two-step random access (2-Step RACH).

[0105] As an embodiment, the first information includes all or part of a MAC SDU (Service Data Unit) in MsgB (Message B) in a two-step random access (2-Step RACH).

[0106] As an embodiment, the first information includes all or part of a subheader (Subheader) in MsgB (Message B) in two-step random access (2-Step RACH).

[0107] As an embodiment, the first information includes all or part of a MAC CE (Control Element) in MsgB (Message B) in two-step random access (2-Step RACH).

[0108] As an embodiment, the first information is transmitted via a DL-SCH (Downlink Shared Channel).

[0109] As an embodiment, the first information is transmitted via a PDSCH (Physical Downlink Shared Channel).

[0110] As an embodiment, the first information is transmitted via a PDSCH (Physical Downlink Shared Channel), and RA-RNTI (Random Access Radio Network Temporary Identity) is used to generate an initial value of a generator of a scrambling code sequence for the PDSCH carrying the first information.

[0111] As an embodiment, the first information is transmitted via a PDSCH (Physical Downlink Shared Channel), and TC-RNTI (Temporary Cell Radio Network Temporary Identity) is used to generate an initial value of a generator of a scrambling code sequence for the PDSCH carrying the first information.

[0112] As an embodiment, the first information is transmitted through a PDSCH (Physical Downlink Shared Channel), and an identifier other than RA-RNTI (Random Access Radio Network Temporary Identity) and TC-RNTI (Temporary Cell Radio Network Temporary Identity) is used to generate an initial value of a generator of a scrambling code sequence for the PDSCH carrying the first information.

[0113] As an embodiment, the first information is transmitted via a PDSCH (Physical Downlink Shared Channel), and MsgB-RNTI (Message B Radio Network Temporary Identifier) ​​is used to generate an initial value of a generator of a scrambling code sequence of the PDSCH carrying the first information.

[0114] As an embodiment, the first information is broadcast.

[0115] As an embodiment, the first information is unicast.

[0116] As an embodiment, the first information is cell specific (Cell Specific).

[0117] As an embodiment, the first information is user equipment-specific (UE-specific).

[0118] As an embodiment, the first information is user equipment group-specific (UE group-specific).

[0119] As an embodiment, the first information is transmitted via PDCCH (Physical Downlink Control Channel, narrowband physical downlink control channel).

[0120] As an embodiment, the first information includes all or part of a field (Field) of a DCI (Downlink Control Information) signaling.

[0121] As an embodiment, the above sentence "the first information is used to determine X candidate time lengths" includes the following meaning: the first information is used by the first communication node to determine the X candidate time lengths.

[0122] As an embodiment, the above sentence “the first information is used to determine X candidate time lengths” includes the following meaning: the first information is used to directly indicate the X candidate time lengths.

[0123] As an embodiment, the above sentence “the first information is used to determine X candidate time lengths” includes the following meaning: the first information is used to indirectly indicate the X candidate time lengths.

[0124] As an embodiment, the above sentence “the first information is used to determine X candidate time lengths” includes the following meaning: the first information is used to explicitly indicate the X candidate time lengths.

[0125] As an embodiment, the above sentence “the first information is used to determine X candidate time lengths” includes the following meaning: the first information is used to implicitly indicate the X candidate time lengths.

[0126] As an embodiment, the above sentence “the first information is used to determine X candidate time lengths” includes the following meaning: the first information is used to determine one candidate time length among the X candidate time lengths.

[0127] As an embodiment, the above sentence “the first information is used to determine X candidate time lengths” includes the following meaning: the first information is used to determine a portion of the candidate time lengths among the X candidate time lengths.

[0128] As an embodiment, the above sentence “the first information is used to determine X candidate time lengths” includes the following meaning: the first information is used to determine all the candidate time lengths among the X candidate time lengths.

[0129] As an embodiment, X is equal to 2.

[0130] As an embodiment, X is greater than 2.

[0131] As an embodiment, the second sequence is a preamble sequence.

[0132] As an embodiment, the second sequence is a pseudo-random sequence.

[0133] As an embodiment, the second sequence is a Zadoff-Chu (ZC) sequence.

[0134] As an embodiment, the second sequence includes all elements of a Zadoff-Chu (ZC) sequence.

[0135] As an embodiment, the second sequence includes only some elements of a Zadoff-Chu (ZC) sequence.

[0136] As an embodiment, the second sequence is a Zadoff-Chu (ZC) sequence with a length of 839.

[0137] As an embodiment, the second sequence is a Zadoff-Chu (ZC) sequence with a length of 139.

[0138] As an embodiment, all elements in the second sequence are the same.

[0139] As an embodiment, there are two different elements in the second sequence.

[0140] As an embodiment, all elements in the second sequence are 1.

[0141] As an embodiment, the second sequence includes a CP (Cyclic Prefix).

[0142] As an embodiment, the second sequence is transmitted via PRACH (Physical Random Access Channel).

[0143] As an embodiment, the first sequence and the second sequence are the same.

[0144] As an embodiment, the first sequence and the second sequence are different.

[0145] As an embodiment, the transmission power of the first sequence and the second sequence is the same.

[0146] As an embodiment, the transmission power of the first sequence and the second sequence are different.

[0147] As an embodiment, the transmission power of the second sequence is greater than the transmission power of the first sequence.

[0148] As an embodiment, the second sequence is a preamble sequence in re-initiating random access.

[0149] As an embodiment, the first sequence is a preamble sequence in the first initiation of random access.

[0150] As an embodiment, the first sequence is a preamble sequence in re-initiating random access.

[0151] As an embodiment, the random access process using the first sequence as a preamble sequence is not successful.

[0152] As an embodiment, the random access process of the first sequence as a leading sequence is not completed.

[0153] As an embodiment, the first communication node determines whether to send the second wireless signal based on performance requirements of random access.

[0154] As an embodiment, the first communication node determines whether to send the second wireless signal based on a delay requirement of random access.

[0155] As an embodiment, the first communication node determines whether to send the second wireless signal based on instructions from a higher layer.

[0156] As an embodiment, the first communication node determines whether to send the second wireless signal based on instructions from a higher level within the first communication node.

[0157] As an embodiment, the first communication node determines whether to send the second wireless signal based on service requirements.

[0158] As an embodiment, the first communication node determines whether to send the second wireless signal based on the service type.

[0159] As an embodiment, the first communication node determines by itself whether to send the second wireless signal.

[0160] As an embodiment, the first communication node randomly determines whether to send the second wireless signal.

[0161] As an embodiment, the above sentence "determine whether to send a second wireless signal" includes the following meaning: determine whether to initiate a two-step random access (2-Step RACH).

[0162] As an embodiment, the above sentence "determine whether to send a second wireless signal" includes the following meaning: determine whether to initiate a random access other than 4-Step Random Access (4-Step RACH).

[0163] As an embodiment, the above sentence "determine whether to send a second wireless signal" includes the following meaning: determine whether to initiate a two-step random access (2-Step RACH) or to initiate a four-step random access (4-Step RACH).

[0164] As an embodiment, the above sentence "determine whether to send a second wireless signal" includes the following meaning: determine whether to initiate the two-step random access (2-Step RACH) defined in 3GPP R16 (Release 16) or initiate the four-step random access (4-Step RACH) defined in 3GPP R15.

[0165] As an embodiment, the above sentence "determine whether to send a second wireless signal" includes the following meaning: determine whether to initiate a two-step random access (2-Step RACH) that is not backward compatible with 3GPP R15 or to initiate a four-step random access (4-Step RACH) that is compatible with 3GPP R15.

[0166] As an embodiment, the above sentence "determine whether to send a second wireless signal" includes the following meaning: determine whether to send MsgA (message A) or only send the second sequence.

[0167] As an embodiment, the above sentence "determine whether to send a second wireless signal" includes the following meaning: determine whether the first step in the random access process is to send MsgA (message A) or to send only the second sequence.

[0168] As an embodiment, the above sentence "determine whether to send a second wireless signal" includes the following meaning: determine whether to send MsgA (message A) or only send the second sequence before receiving a random access response from the network side.

[0169] As an embodiment, the second wireless signal is transmitted via UL-SCH (Uplink Shared Channel).

[0170] As an embodiment, the second wireless signal is transmitted via PUSCH (Physical Uplink Shared Channel).

[0171] As an embodiment, a transport block (TB) sequentially undergoes CRC addition (CRC Insertion), channel coding (Channel Coding), rate matching (Rate Matching), scrambling (Scrambling), modulation (Modulation), layer mapping (Layer Mapping), precoding (Precoding), mapping to virtual resource blocks (Mapping to Virtual Resource Blocks), mapping from virtual resource blocks to physical resource blocks (Mappingfrom Virtual to Physical Resource Blocks), OFDM baseband signal generation (OFDM Baseband Signal Generation), and modulation upconversion (Modulation and Upconversion) to obtain the second wireless signal.

[0172] As an embodiment, a transport block (TB) sequentially undergoes CRC addition (CRC Insertion), segmentation (Segmentation), coding block level CRC addition (CRC Insertion), channel coding (Channel Coding), rate matching (Rate Matching), concatenation (Concatenation), scrambling (Scrambling), modulation (Modulation), layer mapping (Layer Mapping), precoding (Precoding), mapping to virtual resource blocks (Mapping to Virtual Resource Blocks), mapping from virtual resource blocks to physical resource blocks (Mapping from Virtual to Physical Resource Blocks), OFDM baseband signal generation (OFDM Baseband Signal Generation), and modulation upconversion (Modulation and Upconversion) to obtain the second wireless signal.

[0173] As an embodiment, a transport block (TB) sequentially undergoes CRC addition (CRC Insertion), channel coding (Channel Coding), rate matching (Rate Matching), scrambling (Scrambling), modulation (Modulation), layer mapping (Layer Mapping), transform precoding (Transform Precoding), precoding (Precoding), mapping to virtual resource blocks (Mapping to Virtual Resource Blocks), mapping from virtual resource blocks to physical resource blocks (Mapping from Virtual to Physical Resource Blocks), OFDM baseband signal generation (OFDM Baseband Signal Generation), and modulation upconversion (Modulation and Upconversion) to obtain the second wireless signal.

[0174] As an embodiment, a transport block (TB) sequentially undergoes CRC addition (CRC Insertion), segmentation (Segmentation), coding block level CRC addition (CRC Insertion), channel coding (Channel Coding), rate matching (Rate Matching), concatenation (Concatenation), scrambling (Scrambling), modulation (Modulation), layer mapping (Layer Mapping), transform precoding (Transform Precoding), precoding (Precoding), mapping to virtual resource blocks (Mapping to Virtual Resource Blocks), mapping from virtual resource blocks to physical resource blocks (Mapping from Virtual to Physical Resource Blocks), OFDM baseband signal generation (OFDM Baseband Signal Generation), and modulation upconversion (Modulation and Upconversion) to obtain the second wireless signal.

[0175] As an embodiment, the second wireless signal includes PUSCH (Physical Uplink Shared Channel) and DMRS (Demodulation Reference Signal).

[0176] As an embodiment, the second wireless signal only includes PUSCH (Physical Uplink Shared Channel).

[0177] As an embodiment, the sending time of the first sequence refers to: the starting time of sending the first sequence.

[0178] As an embodiment, the sending time of the first sequence refers to: the sending end time of the first sequence.

[0179] As an embodiment, the sending time of the first sequence refers to: the starting time of the time slot to which the time domain resources occupied by the first sequence belong.

[0180] As an embodiment, the sending time of the first sequence refers to: the end time of the time slot to which the time domain resources occupied by the first sequence belong.

[0181] As an embodiment, the sending time of the first sequence refers to: the starting time of the subframe to which the time domain resources occupied by the first sequence belong.

[0182] As an embodiment, the sending time of the first sequence refers to: the end time of the subframe to which the time domain resources occupied by the first sequence belong.

[0183] As an embodiment, the sending time of the second sequence refers to: the starting time of sending the second sequence.

[0184] As an embodiment, the sending time of the second sequence refers to: the sending end time of the second sequence.

[0185] As an embodiment, the sending time of the second sequence refers to: the starting time of the time slot to which the time domain resources occupied by the second sequence belong.

[0186] As an embodiment, the sending time of the second sequence refers to: the end time of the time slot to which the time domain resources occupied by the second sequence belong.

[0187] As an embodiment, the sending time of the second sequence refers to: the starting time of the subframe to which the time domain resources occupied by the second sequence belong.

[0188] As an embodiment, the sending time of the second sequence refers to: the end time of the subframe to which the time domain resources occupied by the second sequence belong.

[0189] As an embodiment, the above sentence "the time interval between the sending moment of the first sequence and the sending moment of the second sequence is not less than the target time length" includes the following meaning: the time interval between the starting moment of sending the first sequence and the starting moment of sending the second sequence is not less than the target time length.

[0190] As an embodiment, the above sentence "the time interval between the sending moment of the first sequence and the sending moment of the second sequence is not less than the target time length" includes the following meaning: the time interval between the sending end moment of the first sequence and the sending start moment of the second sequence is not less than the target time length.

[0191] As an embodiment, the above sentence "the time interval between the sending moment of the first sequence and the sending moment of the second sequence is not less than the target time length" includes the following meaning: the time interval between the sending end moment of the first sequence and the sending end moment of the second sequence is not less than the target time length.

[0192] As an embodiment, the above sentence "the time interval between the sending moment of the first sequence and the sending moment of the second sequence is not less than the target time length" includes the following meaning: the time interval from the moment when the random access process with the first sequence as the leading sequence is determined to be not completed to the moment when the random access process with the second sequence as the leading sequence is initiated is not less than the target time length.

[0193] As an embodiment, the above sentence "the time interval between the sending moment of the first sequence and the sending moment of the second sequence is not less than the target time length" includes the following meaning: the time interval from the moment when the random access process with the first sequence as the leading sequence is determined to be not completed to the starting moment when the random access resource selection is initiated in the random access process with the second sequence as the leading sequence is not less than the target time length.

[0194] As an embodiment, the above sentence "the time interval between the sending moment of the first sequence and the sending moment of the second sequence is not less than the target time length" includes the following meaning: the time interval from the starting moment of initiating random access resource selection in the random access process with the first sequence as the leading sequence to the starting moment of initiating random access resource selection in the random access process with the second sequence as the leading sequence is not less than the target time length.

[0195] The length of the time interval between the sending moment of the first sequence and the sending moment of the second sequence is not less than the target time length” includes the following meaning: the length of the time interval from the end moment of initiating random access resource selection in the random access process using the first sequence as the preamble sequence to the start moment of initiating random access resource selection in the random access process using the second sequence as the preamble sequence is not less than the target time length.

[0196] As an embodiment, the above sentence "the time interval between the sending time of the first sequence and the sending time of the second sequence is not less than the target time length" includes the following meaning: the time interval from the end time of receiving the first information to the start time of sending the second sequence is not less than the target time length.

[0197] As an embodiment, the time from the end of receiving the first information to the start of sending the second sequence is not less than the target time length.

[0198] As an embodiment, the end time of sending the first sequence is no later than the start time of receiving the first information.

[0199] As an embodiment, the target time length is equal to a backoff time.

[0200] As an embodiment, the target time length is equal to a random backoff time.

[0201] As an embodiment, the target time length is a backoff time between two random accesses.

[0202] As an embodiment, the target time length is equal to the "random backoff time" in section 5.1.4 of 3GPP TS38.321 (v15.3.0).

[0203] As an embodiment, the target time length is greater than 0 milliseconds (ms).

[0204] As an embodiment, the target time length is equal to 0 milliseconds (ms).

[0205] As an embodiment, the target time length is less than or equal to the first time length.

[0206] As an embodiment, the unit of the target time length is millisecond (ms).

[0207] As an embodiment, the target time length is expressed as the number of time slots.

[0208] As an embodiment, the target time length is expressed as the number of multi-carrier symbols (OFDM symbols).

[0209] As an embodiment, the target time length is expressed as the number of subframes.

[0210] As an embodiment, the target time length is greater than or equal to 0 milliseconds.

[0211] As an embodiment, the target time length belongs to the interval [0, the first time length].

[0212] As an embodiment, the target time length is equal to a value between 0 and the first time length.

[0213] As an embodiment, the unit of the first time length is millisecond (ms).

[0214] As an embodiment, the first time length is expressed as the number of time slots.

[0215] As an embodiment, the first time length is expressed as the number of multi-carrier symbols (OFDM symbols).

[0216] As an embodiment, the first time length is expressed as the number of subframes.

[0217] As an embodiment, the first time length is "PREAMBLE_BACKOFF" in section 5.1 of 3GPP TS38.321 (v15.3.0).

[0218] As an embodiment, the first time length is equal to an upper limit of a backoff time.

[0219] As an embodiment, the first time length is equal to a possible maximum value of a random backoff time.

[0220] As an embodiment, the above sentence "the first communication node randomly selects the target time length from the interval from 0 to the first time length" includes the following meaning: the first communication node randomly selects the target time length from the interval from 0 to the first time length according to a given probability distribution.

[0221] As an embodiment, the above sentence "the first communication node randomly selects the target time length from the interval from 0 to the first time length" includes the following meaning: the first communication node randomly selects the target time length with medium probability from the interval from 0 to the first time length.

[0222] As an embodiment, the above sentence "the first communication node randomly selects the target time length from the interval from 0 to the first time length" includes the following meaning: the first communication node randomly selects the target time length from the interval from 0 to the first time length according to a uniform probability distribution (Uniform Distribution).

[0223] As an embodiment, the unit of any one of the X candidate time lengths is milliseconds (ms).

[0224] As an embodiment, any one of the X candidate time lengths is represented by the number of time slots.

[0225] As an embodiment, any one of the X candidate time lengths is represented by the number of subframes.

[0226] As an embodiment, any one of the X candidate time lengths is represented by the number of multi-carrier symbols (OFDM symbols).

[0227] As an embodiment, two of the X candidate time lengths are equal.

[0228] As an embodiment, any two candidate time lengths among the X candidate time lengths are not equal.

[0229] As an embodiment, any one of the X candidate time lengths is not less than 0.

[0230] As an embodiment, there is one candidate time length equal to 0 among the X candidate time lengths.

[0231] As an embodiment, any one of the X candidate time lengths is greater than 0.

[0232] As an embodiment, the above sentence "whether the second wireless signal is sent to determine the first time length among the X alternative time lengths" includes the following meaning: whether the first communication node initiates two-step random access or initiates four-step random access to determine the first time length among the X alternative time lengths.

[0233] As an embodiment, the above sentence "whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths" includes the following meaning: whether the second wireless signal is sent is used by the first communication node to determine the first time length among the X alternative time lengths.

[0234] As an embodiment, the above sentence "whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths" includes the following meaning: whether the second wireless signal is sent is directly used to determine the first time length among the X alternative time lengths.

[0235] As an embodiment, the above sentence "whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths" includes the following meaning: whether the second wireless signal is sent is indirectly used to determine the first time length among the X alternative time lengths.

[0236] As an embodiment, the above sentence "whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths" includes the following meaning: only whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths.

[0237] As an embodiment, the above sentence "whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths" includes the following meaning: whether the second wireless signal is sent and other factors are used together to determine the first time length among the X alternative time lengths.

[0238] As an embodiment, the above sentence "whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths" includes the following meaning: X is equal to 2, if the second wireless signal is sent, the first time length is equal to one of the X alternative time lengths, otherwise the first time length is equal to another alternative time length among the X alternative time lengths.

[0239] As an embodiment, the above sentence "whether the second wireless signal is sent to determine the first time length among the X alternative time lengths" includes the following meaning: X is equal to 2, if the first communication node initiates two-step random access (2-Step RACH), the first time length is equal to one of the X alternative time lengths; if the first communication node initiates four-step random access (4-Step RACH), the first time length is equal to another alternative time length among the X alternative time lengths.

[0240] As an embodiment, the above sentence "whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths" includes the following meaning: whether the second wireless signal is sent and the state of the first communication node (RRC_IDLE, RRC_CONNECTED or RRC_INACTIVE) are used together to determine the first time length among the X alternative time lengths.

[0241] As an embodiment, the above sentence "whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths" includes the following meaning: whether the second wireless signal is sent and the triggering reason for sending the second sequence (Beam Failure Recovery, Handover or other) are used together to determine the first time length among the X alternative time lengths.

[0242] As an embodiment, the above sentence "whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths" includes the following meaning: whether the second wireless signal is sent and the sending of the second sequence is used together to determine the first time length among the X alternative time lengths.

[0243] As an embodiment, the first sequence, the first information and the second sequence are all transmitted via an air interface.

[0244] As an embodiment, the first sequence, the first information and the second sequence are all transmitted via a wireless interface.

[0245] As an embodiment, the first sequence, the first information and the second sequence are all transmitted through a wireless channel.

[0246] As an embodiment, the first sequence, the first information and the second sequence are all transmitted through the Uu interface.

[0247] As an embodiment, the first sequence, the first information and the second sequence are all transmitted through the interface between the second communication node and the first communication node in the present application.

[0248] Example 2

[0249] Embodiment 2 illustrates a schematic diagram of a network architecture according to the present application, as shown in the attached Figure 2 shown. Figure 22 is a diagram illustrating a network architecture 200 for NR 5G, LTE (Long-Term Evolution) and LTE-A (Long-Term Evolution Advanced) systems. The NR 5G or LTE network architecture 200 may be referred to as an EPS (Evolved Packet System) 200. The EPS 200 may include one or more UEs (User Equipment) 201, NG-RAN (Next Generation Radio Access Network) 202, EPC (Evolved Packet Core) / 5G-CN (5G-Core Network) 210, HSS (Home Subscriber Server) 220, and Internet services 230. The EPS may be interconnected with other access networks, but these entities / interfaces are not shown for simplicity. As shown, the EPS provides packet-switched services, but those skilled in the art will readily appreciate that the various concepts presented throughout this application may be extended to networks providing circuit-switched services or other cellular networks. NG-RAN includes NR Node B (gNB) 203 and other gNBs 204. gNB 203 provides user and control plane protocol terminations toward UE 201. gNB 203 can be connected to other gNBs 204 via an Xn interface (e.g., backhaul). gNB 203 may also be referred to as a base station, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a TRP (transmit receive node), or some other suitable term. In a non-terrestrial network, gNB 203 may be a satellite, an aircraft, or a ground base station relayed by a satellite. gNB 203 provides an access point to EPC / 5G-CN 210 for UE 201. Examples of UE 201 include a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop computer, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., an MP3 player), a camera, a game console, a drone, an aircraft, a narrowband Internet of Things device, a machine type communication device, a land vehicle, an automobile, a wearable device, or any other similar functional device. A person skilled in the art may also refer to UE 201 as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable term. The gNB 203 is connected to the EPC / 5G-CN 210 via an S1 / NG interface.EPC / 5G-CN210 includes MME / AMF / UPF 211, other MME / AMF / UPF214, S-GW (Service Gateway) 212 and P-GW (Packet Data Network Gateway) 213. MME / AMF / UPF211 is a control node that processes signaling between UE201 and EPC / 5G-CN210. Generally, MME / AMF / UPF211 provides bearer and connection management. All user IP (Internet Protocal) packets are transmitted through S-GW212, and S-GW212 itself is connected to P-GW213. P-GW213 provides UE IP address allocation and other functions. P-GW213 is connected to Internet service 230. Internet service 230 includes Internet protocol services corresponding to operators, which may specifically include Internet, intranet, IMS (IP Multimedia Subsystem) and packet switching services.

[0250] As an embodiment, the UE201 corresponds to the first communication node device in this application.

[0251] As an embodiment, the UE 201 supports 2-step random access.

[0252] As an embodiment, the gNB203 corresponds to the second communication node device in this application.

[0253] As an embodiment, the gNB203 supports 2-step random access.

[0254] Example 3

[0255] Embodiment 3 shows a schematic diagram of an embodiment of a wireless protocol architecture of a user plane and a control plane according to the present application, as shown in the attached Figure 3 shown. Figure 3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane and a control plane, Figure 3The radio protocol architecture for a first communication node device (UE) and a second communication node device (gNB, eNB or relay) 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 in this article. Layer 2 (L2 layer) 305 is above PHY301 and is responsible for the link between the first communication node device and the second communication node device through PHY301. In the user plane, the L2 layer 305 includes a MAC (Medium Access Control) sublayer 302, an RLC (Radio Link Control) sublayer 303 and a PDCP (Packet Data Convergence Protocol) sublayer 304, which terminate at the second communication node device on the network side. Although not shown, the first communication node device may have several upper layers above the L2 layer 305, including a network layer (e.g., an IP layer) terminated at the P-GW on the network side and an application layer terminated at the other end of the connection (e.g., a remote UE, a server, etc.). The PDCP sublayer 304 provides multiplexing between different radio bearers and logical channels. The PDCP sublayer 304 also provides header compression for upper layer data packets to reduce radio transmission overhead, provides security by encrypting data packets, and provides inter-zone mobility support for the first communication node device between the second communication node devices. The RLC sublayer 303 provides segmentation and reassembly of upper layer data packets, retransmission of lost data packets, and reordering of data packets to compensate for out-of-order reception due to HARQ. 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 between the first communication node devices. The MAC sublayer 302 is also responsible for HARQ operations. In the control plane, the radio protocol architecture for the first communication node device and the second communication node device is substantially the same for the physical layer 301 and the L2 layer 305, but there is no header compression function for the control plane. The control plane also includes an RRC (Radio Resource Control) sublayer 306 in layer 3 (L3 layer). The RRC sublayer 306 is responsible for obtaining radio resources (i.e., radio bearers) and configuring the lower layers using RRC signaling between the second communication node device and the first communication node device.

[0256] As an example, Figure 3 The wireless protocol architecture is applicable to the first communication node device in this application.

[0257] As an example, Figure 3The wireless protocol architecture is applicable to the second communication node device in this application.

[0258] As an embodiment, the first sequence in the present application is generated in the RRC306.

[0259] As an embodiment, the first sequence in the present application is generated by the MAC302.

[0260] As an embodiment, the first sequence in the present application is generated by the PHY301.

[0261] As an embodiment, the first information in the present application is generated in the RRC306.

[0262] As an embodiment, the first information in the present application is generated by the MAC302.

[0263] As an embodiment, the first information in the present application is generated by the PHY301.

[0264] As an embodiment, the second sequence in the present application is generated in the RRC306.

[0265] As an embodiment, the second sequence in the present application is generated by the MAC302.

[0266] As an embodiment, the second sequence in the present application is generated by the PHY301.

[0267] As an embodiment, the first wireless signal in the present application is generated in the RRC306.

[0268] As an embodiment, the first wireless signal in the present application is generated by the MAC302.

[0269] As an embodiment, the first wireless signal in the present application is generated by the PHY301.

[0270] As an embodiment, the second wireless signal in the present application is generated in the RRC306.

[0271] As an embodiment, the second wireless signal in the present application is generated by the MAC302.

[0272] As an embodiment, the second wireless signal in the present application is generated by the PHY301.

[0273] As an embodiment, the second information in the present application is generated in the RRC306.

[0274] As an embodiment, the second information in the present application is generated by the MAC302.

[0275] As an embodiment, the second information in the present application is generated by the PHY301.

[0276] Example 4

[0277] Embodiment 4 shows a schematic diagram of a base station device and a given user equipment according to the present application, as shown in the attached Figure 4 shown. Figure 4 is a block diagram of a gNB / eNB 410 communicating with a UE 450 in an access network.

[0278] The user equipment (UE450) includes a controller / processor 490, a memory 480, a receiving processor 452, a transmitter / receiver 456, a transmitting processor 455 and a data source 467. The transmitter / receiver 456 includes an antenna 460. The data source 467 provides an upper layer packet to the controller / processor 490. The controller / processor 490 provides packet header compression and decompression, encryption and decryption, packet segmentation connection and reordering, and multiplexing and demultiplexing between logical and transport channels to implement the L2 layer protocol for the user plane and the control plane. The upper layer packet may include data or control information, such as DL-SCH or UL-SCH. The transmitting processor 455 implements various signal transmission processing functions for the L1 layer (i.e., the physical layer) including coding, interleaving, scrambling, modulation, power control / allocation, precoding and physical layer control signaling generation. The receiving processor 452 implements various signal reception processing functions for the L1 layer (i.e., the physical layer) including decoding, deinterleaving, descrambling, demodulation, deprecoding and physical layer control signaling extraction. The transmitter 456 is used to convert the baseband signal provided by the transmission processor 455 into a radio frequency signal and transmit it via the antenna 460 . The receiver 456 is used to convert the radio frequency signal received by the antenna 460 into a baseband signal and provide it to the reception processor 452 .

[0279] The base station device (410) may include a controller / processor 440, a memory 430, a receiving processor 412, a transmitter / receiver 416 and a transmitting processor 415, wherein the transmitter / receiver 416 includes an antenna 420. The upper layer packet arrives at the controller / processor 440, and the controller / processor 440 provides packet header compression and decompression, encryption and decryption, packet segmentation connection and reordering, and multiplexing and demultiplexing between logical and transport channels to implement the L2 layer protocol for the user plane and the control plane. The upper layer packet may include data or control information, such as DL-SCH or UL-SCH. The transmitting processor 415 implements various signal transmission processing functions for the L1 layer (i.e., the physical layer), including coding, interleaving, scrambling, modulation, power control / allocation, precoding, and physical layer signaling (including synchronization signals and reference signals, etc.) generation, etc. The receiving processor 412 implements various signal reception processing functions for the L1 layer (i.e., the physical layer), including decoding, deinterleaving, descrambling, demodulation, deprecoding, and physical layer signaling extraction, etc. The transmitter 416 is used to convert the baseband signal provided by the transmission processor 415 into a radio frequency signal and transmit it via the antenna 420 . The receiver 416 is used to convert the radio frequency signal received by the antenna 420 into a baseband signal and provide it to the reception processor 412 .

[0280] In DL (Downlink), upper layer packets (such as the upper layer packets to which the first information and the second information in the present application belong) are provided to the controller / processor 440. The controller / processor 440 implements the functions of the L2 layer. In DL, the controller / processor 440 provides packet header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and allocation of radio resources to the UE450 based on various priority metrics. The controller / processor 440 is also responsible for HARQ operations, retransmission of lost packets, and signaling to the UE450, such as the first information and the second information in the present application are generated in the controller / processor 440. The transmit processor 415 implements various signal processing functions for the L1 layer (i.e., the physical layer) and the generation of L1 layer signaling, the signal processing functions include decoding and interleaving to facilitate forward error correction (FEC) at the UE 450 and modulating the baseband signal based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK)), dividing the modulation symbols into parallel streams and mapping each stream to a corresponding multi-carrier subcarrier and / or multi-carrier symbol, which is then mapped by the transmit processor 415 to the antenna 420 via the transmitter 416 and transmitted in the form of a radio frequency signal. The wireless signal carrying the first information and the second information in the present application is mapped to the target air interface resource by the transmit processor 415 in the corresponding channel of the physical layer and mapped to the antenna 420 via the transmitter 416 and transmitted in the form of a radio frequency signal. At the receiving end, each receiver 456 receives the radio frequency signal through its corresponding antenna 460, and each receiver 456 recovers the baseband information modulated on the radio frequency carrier and provides the baseband information to the receive processor 452. The receiving processor 452 implements various signal receiving processing functions of the L1 layer and the reception of L1 layer signaling. The signal receiving processing functions include receiving the physical layer signal of the wireless signal carrying the first information and the second information in the present application, etc., demodulating the multi-carrier symbols in the multi-carrier symbol stream based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK)), then decoding and deinterleaving to recover the data or control transmitted by the gNB410 on the physical channel, and then providing the data and control signals to the controller / processor 490. The controller / processor 490 implements the L2 layer, and the controller / processor 490 interprets the first information and the second information in the present application. The controller / processor may be associated with a memory 480 that stores program code and data. The memory 480 may be referred to as a computer-readable medium.

[0281] In uplink (UL) transmission, data source 467 is used to provide relevant configuration data of the signal to controller / processor 490. Data source 467 represents all protocol layers above the L2 layer, and the first radio signal and the second radio signal in the present application are generated at data source 467. Controller / processor 490 implements L2 layer protocols for user plane and control plane by providing header compression, encryption, packet segmentation and reordering, and multiplexing between logical and transport channels based on configuration allocation of gNB410. Controller / processor 490 is also responsible for HARQ operations, retransmission of lost packets, and signaling to gNB410. Transmit processor 455 implements various signal transmission processing functions for L1 layer (i.e., physical layer) and signaling of L1 layer. The signal transmission processing function includes coding, modulation, etc., dividing the modulated symbols into parallel streams and mapping each stream to the corresponding multi-carrier subcarrier and / or multi-carrier symbol to generate the baseband signal, and then the transmission processor 455 maps it to the antenna 460 via the transmitter 456 and transmits it in the form of a radio frequency signal. The physical layer signal (including the first sequence, the second sequence, the first wireless signal and the second wireless signal in the physical layer processing in this application) is generated by the transmission processor 455. The receiver 416 receives the radio frequency signal through its corresponding antenna 420, and each receiver 416 recovers the baseband information modulated on the radio frequency carrier and provides the baseband information to the receiving processor 412. The receiving processor 412 implements various signal receiving processing functions for the L1 layer (i.e., the physical layer) and the signaling of the L1 layer, including the reception of the first sequence in the present application, the reception of the first wireless signal, the reception of the second sequence, determining whether to send the second wireless signal and if sent, the reception of the second wireless signal at the physical layer, and the signal receiving processing function includes obtaining a multi-carrier symbol stream, then demodulating the multi-carrier symbols in the multi-carrier symbol stream based on various modulation schemes, and then decoding to recover the data and / or control signal originally transmitted by the UE450 on the physical channel. The data and / or control signal is then provided to the controller / processor 440. The L2 layer is implemented in the receiving processor controller / processor 440. The controller / processor may be associated with a memory 430 that stores program code and data. The memory 430 may be a computer-readable medium.

[0282] As an embodiment, the UE450 corresponds to the first communication node device in the present application.

[0283] As an embodiment, the gNB410 corresponds to the second communication node device in this application.

[0284] As an embodiment, the UE450 device includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used together with the at least one processor, and the UE450 device at least: sends a first sequence; receives a first information, the first information is used to determine X alternative time lengths, and X is a positive integer greater than 1; sends a second sequence and determines whether to send a second wireless signal; wherein the time interval between the sending moment of the first sequence and the sending moment of the second sequence is not less than a target time length; the first time length is equal to one of the X alternative time lengths, and the target time length is not greater than the first time length; if the first time length is greater than 0, the first communication node randomly selects the target time length from the interval of 0 to the first time length; if the first time length is equal to 0, the target time length is equal to 0; whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths.

[0285] As an embodiment, the UE450 includes: a memory storing a computer-readable instruction program, wherein the computer-readable instruction program generates actions when executed by at least one processor, the actions including: sending a first sequence; receiving a first information, wherein the first information is used to determine X alternative time lengths, wherein X is a positive integer greater than 1; sending a second sequence and determining whether to send a second wireless signal; wherein the time interval between the sending time of the first sequence and the sending time of the second sequence is not less than a target time length; the first time length is equal to one of the X alternative time lengths, and the target time length is not greater than the first time length; if the first time length is greater than 0, the first communication node randomly selects the target time length from the interval of 0 to the first time length; if the first time length is equal to 0, the target time length is equal to 0; whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths.

[0286] As an embodiment, the gNB410 device 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 gNB410 device at least: receives a first sequence; sends a first information, the first information is used to determine X alternative time lengths, and X is a positive integer greater than 1; receives a second sequence and determines whether a second wireless signal is sent; wherein the time interval between the sending time of the first sequence and the sending time of the second sequence is not less than a target time length; the first time length is equal to one of the X alternative time lengths, and the target time length is not greater than the first time length; if the first time length is greater than 0, the sender of the first sequence randomly selects the target time length from the interval of 0 to the first time length; if the first time length is equal to 0, the target time length is equal to 0; whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths.

[0287] As an embodiment, the gNB410 includes: a memory storing a computer-readable instruction program, wherein the computer-readable instruction program generates actions when executed by at least one processor, and the actions include: receiving a first sequence; sending a first information, wherein the first information is used to determine X alternative time lengths, wherein X is a positive integer greater than 1; receiving a second sequence and determining whether a second wireless signal is sent; wherein the time interval between the sending time of the first sequence and the sending time of the second sequence is not less than a target time length; the first time length is equal to one of the X alternative time lengths, and the target time length is not greater than the first time length; if the first time length is greater than 0, the sender of the first sequence randomly selects the target time length from the interval of 0 to the first time length; if the first time length is equal to 0, the target time length is equal to 0; whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths.

[0288] As an embodiment, the receiver 456 (including the antenna 460), the receiving processor 452 and the controller / processor 490 are used to receive the first information in the present application.

[0289] As an embodiment, the receiver 456 (including the antenna 460), the receiving processor 452 and the controller / processor 490 are used to receive the second information in the present application.

[0290] As an embodiment, the transmitter 456 (including the antenna 460) and the transmit processor 452 are used to send the first sequence in the present application.

[0291] As an embodiment, the transmitter 456 (including the antenna 460) and the transmit processor 452 are used to send the second sequence in the present application.

[0292] As an embodiment, the transmitter 456 (including the antenna 460), the transmission processor 452 and the controller / processor 490 are used to send the first wireless signal in the present application.

[0293] As an embodiment, the controller / processor 490 is used in the present application to determine whether to send the second wireless signal.

[0294] As an embodiment, the transmitter 416 (including the antenna 420), the transmission processor 415 and the controller / processor 440 are used to send the first information in this application.

[0295] As an embodiment, the transmitter 416 (including the antenna 420), the transmission processor 415 and the controller / processor 440 are used to send the second information in the present application.

[0296] As an embodiment, the receiver 416 (including the antenna 420) and the receiving processor 412 are used to receive the first sequence in the present application.

[0297] As an embodiment, the receiver 416 (including the antenna 420) and the receiving processor 412 are used to receive the second sequence in the present application.

[0298] As an embodiment, the receiver 416 (including the antenna 420), the receiving processor 412 and the controller / processor 440 are used to receive the first wireless signal in the present application.

[0299] As an embodiment, the receiver 416 (including the antenna 420), the receiving processor 412 and the controller / processor 440 are used to receive the second wireless signal in the present application.

[0300] Example 5

[0301] Embodiment 5 illustrates a wireless signal transmission flow chart according to an embodiment of the present application, as shown in the attached Figure 5 As shown in the attached Figure 5 In the example, the second communication node N1 is a maintenance base station of the service cell of the first communication node U2, and the steps in the dashed box are optional. In particular, the order in this example does not limit the signal transmission order and implementation order in this application.

[0302] for The second communication node N1 , receiving a first sequence in step S11, receiving a first wireless signal in step S12, sending first information in step S13, sending second information in step S14, and receiving a second sequence in step S15.

[0303] for The first communication node U2 , sending a first sequence in step S21, sending a first wireless signal in step S22, receiving first information in step S23, receiving second information in step S24, determining whether to send a second wireless signal in step S25, and sending the first sequence in step S26.

[0304] In Example 5, the first information is used to determine X alternative time lengths, where X is a positive integer greater than 1; the time interval between the sending time of the first sequence and the sending time of the second sequence is not less than the target time length; the first time length is equal to one of the X alternative time lengths, and the target time length is not greater than the first time length; if the first time length is greater than 0, the first communication node device randomly selects the target time length from the interval from 0 to the first time length; if the first time length is equal to 0, the target time length is equal to 0; whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths; the first sequence is used to indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal; the first information and the second information are used to determine the X alternative time lengths respectively, where X is equal to 2.

[0305] As an embodiment, the above sentence "the first sequence is used to indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding scheme adopted by the first wireless signal, and the redundant version adopted by the first wireless signal" includes the following meaning: the first sequence is used to indicate the time-frequency resources occupied by the first wireless signal, the modulation and coding scheme (MCS) adopted by the first wireless signal, and the redundant version adopted by the first wireless signal.

[0306] As an embodiment, the above sentence "the first sequence is used to indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal" includes the following meaning: the first sequence is used to indicate the time-frequency resources occupied by the first wireless signal.

[0307] As an embodiment, the above sentence "the first sequence is used to indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal" includes the following meaning: the first sequence is used to indicate the modulation and coding method adopted by the first wireless signal.

[0308] As an embodiment, the above sentence "the first sequence is used to indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal" includes the following meaning: the first sequence is used to indicate the redundant version adopted by the first wireless signal.

[0309] As an embodiment, the above sentence "the first sequence is used to indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal" includes the following meaning: the first sequence is used to indicate the modulation and coding method adopted by the first wireless signal and the redundant version adopted by the first wireless signal.

[0310] As an embodiment, the above sentence "the first sequence is used to indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal" includes the following meaning: the first sequence is used to indicate the time-frequency resources occupied by the first wireless signal and the redundant version adopted by the first wireless signal.

[0311] As an embodiment, the above sentence "the first sequence is used to indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal" includes the following meaning: the first sequence is used to indicate the time-frequency resources occupied by the first wireless signal and the modulation and coding method adopted by the first wireless signal.

[0312] As an embodiment, the above sentence "the first sequence is used to indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal" includes the following meaning: the first sequence is associated with the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and one of the redundant versions adopted by the first wireless signal.

[0313] As an embodiment, the above sentence "the first sequence is used to indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal" includes the following meaning: the air interface resources occupied by the first sequence are associated with the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and one of the redundant versions adopted by the first wireless signal, and the air interface resources include time-frequency resources and / or code domain resources.

[0314] As an embodiment, the above sentence "the first sequence is used to indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal" includes the following meaning: the time-frequency resources occupied by the first sequence are associated with the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and one of the redundant versions adopted by the first wireless signal.

[0315] As an embodiment, the above sentence "the first sequence is used to indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal" includes the following meaning: the code domain resources occupied by the first sequence are associated with the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and one of the redundant versions adopted by the first wireless signal.

[0316] As an embodiment, the above sentence "the first sequence is used to indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal" includes the following meaning: the first sequence and the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and one of the redundant versions adopted by the first wireless signal are bound according to a mapping relationship.

[0317] As an embodiment, the above sentence "the first sequence is used to indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal" includes the following meaning: there is a mapping relationship between the first sequence and the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and one of the redundant versions adopted by the first wireless signal.

[0318] As an embodiment, the above sentence "the first sequence is used to indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal" includes the following meaning: the first sequence is used to directly indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal.

[0319] As an embodiment, the above sentence "the first sequence is used to indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal" includes the following meaning: the first sequence is used to indirectly indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal.

[0320] As an embodiment, the above sentence "the first sequence is used to indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal" includes the following meaning: the first sequence is used to explicitly indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal.

[0321] As an embodiment, the above sentence "the first sequence is used to indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal" includes the following meaning: the first sequence is used to implicitly indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal.

[0322] As an embodiment, the first sequence and the first wireless signal together constitute MsgA (message A).

[0323] As an embodiment, the first sequence and the first wireless signal both belong to MsgA (message A).

[0324] As an embodiment, the first sequence and the first wireless signal both belong to MsgA (Message A) in 2-Step random access (2-Step).

[0325] As an embodiment, the first wireless signal is transmitted via UL-SCH (Uplink Shared Channel).

[0326] As an embodiment, the first wireless signal is transmitted via PUSCH (Physical Uplink Shared Channel).

[0327] As an embodiment, a transport block (TB) sequentially undergoes CRC addition (CRC Insertion), channel coding (Channel Coding), rate matching (Rate Matching), scrambling (Scrambling), modulation (Modulation), layer mapping (Layer Mapping), precoding (Precoding), mapping to virtual resource blocks (Mapping to Virtual Resource Blocks), mapping from virtual resource blocks to physical resource blocks (Mappingfrom Virtual to Physical Resource Blocks), OFDM baseband signal generation (OFDM Baseband Signal Generation), and modulation upconversion (Modulation and Upconversion) to obtain the first wireless signal.

[0328] As an embodiment, a transport block (TB) sequentially undergoes CRC addition (CRC Insertion), segmentation (Segmentation), coding block level CRC addition (CRC Insertion), channel coding (Channel Coding), rate matching (Rate Matching), concatenation (Concatenation), scrambling (Scrambling), modulation (Modulation), layer mapping (Modulation), precoding (Precoding), mapping to virtual resource blocks (Mapping to Virtual Resource Blocks), mapping from virtual resource blocks to physical resource blocks (Mapping from Virtual to Physical Resource Blocks), OFDM baseband signal generation (OFDM Baseband Signal Generation), and modulation upconversion (Modulation and Upconversion) to obtain the first wireless signal.

[0329] As an embodiment, a transport block (TB) sequentially undergoes CRC addition (CRC Insertion), channel coding (Channel Coding), rate matching (Rate Matching), scrambling (Scrambling), modulation (Modulation), layer mapping (Layer Mapping), transform precoding (Transform Precoding), precoding (Precoding), mapping to virtual resource blocks (Mapping to Virtual Resource Blocks), mapping from virtual resource blocks to physical resource blocks (Mapping from Virtual to Physical Resource Blocks), OFDM baseband signal generation (OFDM Baseband Signal Generation), and modulation upconversion (Modulation and Upconversion) to obtain the first wireless signal.

[0330] As an embodiment, a transport block (TB) sequentially undergoes CRC addition (CRC Insertion), segmentation (Segmentation), coding block level CRC addition (CRC Insertion), channel coding (Channel Coding), rate matching (Rate Matching), concatenation (Concatenation), scrambling (Scrambling), modulation (Modulation), layer mapping (Layer Mapping), transform precoding (Transform Precoding), precoding (Precoding), mapping to virtual resource blocks (Mapping to Virtual Resource Blocks), mapping from virtual resource blocks to physical resource blocks (Mapping from Virtual to Physical Resource Blocks), OFDM baseband signal generation (OFDM Baseband Signal Generation), and modulation upconversion (Modulation and Upconversion) to obtain the first wireless signal.

[0331] As an embodiment, the first wireless signal includes PUSCH (Physical Uplink Shared Channel) and DMRS (Demodulation Reference Signal).

[0332] As an embodiment, the first wireless signal only includes PUSCH (Physical Uplink Shared Channel).

[0333] Example 6

[0334] Embodiment 6 illustrates a wireless signal transmission flow chart according to another embodiment of the present application, as shown in the attached Figure 6 As shown in the attached Figure 6 In the example, the second communication node N3 is a maintenance base station of the service cell of the first communication node U4, and the steps in the dashed box are optional. In particular, the order in this example does not limit the signal transmission order and implementation order in this application.

[0335] for The second communication node N3 , receiving the first sequence in step S31, receiving the first wireless signal in step S32, sending the first information in step S33, sending the second information in step S34, receiving the second sequence in step S35, and receiving the second wireless signal in step S36.

[0336] for First communication node U4 , sending a first sequence in step S41, sending a first wireless signal in step S42, receiving first information in step S43, receiving second information in step S44, determining whether to send a second wireless signal in step S45, sending a second sequence in step S46, and sending a second wireless signal in step S47.

[0337] In Example 6, the first information is used to determine X alternative time lengths, where X is a positive integer greater than 1; the time interval between the sending time of the first sequence and the sending time of the second sequence is not less than the target time length; the first time length is equal to one of the X alternative time lengths, and the target time length is not greater than the first time length; if the first time length is greater than 0, the first communication node device randomly selects the target time length from the interval from 0 to the first time length; if the first time length is equal to 0, the target time length is equal to 0; whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths; the first sequence is used to indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal; the second sequence is used to indicate at least one of the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and the redundant version adopted by the second wireless signal; the first information and the second information are used to respectively determine the X alternative time lengths, where X is equal to 2.

[0338] As an embodiment, the above sentence "the second sequence is used to indicate at least one of the time-frequency resources occupied by the second wireless signal, the modulation and coding scheme adopted by the second wireless signal, and the redundant version adopted by the second wireless signal" includes the following meaning: the second sequence is used to indicate the time-frequency resources occupied by the second wireless signal, the modulation and coding scheme (MCS) adopted by the second wireless signal, and the redundant version adopted by the second wireless signal.

[0339] As an embodiment, the above sentence "the second sequence is used to indicate at least one of the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and the redundant version adopted by the second wireless signal" includes the following meaning: the second sequence is used to indicate the time-frequency resources occupied by the second wireless signal.

[0340] As an embodiment, the above sentence "the second sequence is used to indicate at least one of the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and the redundant version adopted by the second wireless signal" includes the following meaning: the second sequence is used to indicate the modulation and coding method adopted by the second wireless signal.

[0341] As an embodiment, the above sentence "the second sequence is used to indicate at least one of the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and the redundant version adopted by the second wireless signal" includes the following meaning: the second sequence is used to indicate the redundant version adopted by the second wireless signal.

[0342] As an embodiment, the above sentence "the second sequence is used to indicate at least one of the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and the redundant version adopted by the second wireless signal" includes the following meaning: the second sequence is used to indicate the modulation and coding method adopted by the second wireless signal and the redundant version adopted by the second wireless signal.

[0343] As an embodiment, the above sentence "the second sequence is used to indicate at least one of the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and the redundant version adopted by the second wireless signal" includes the following meaning: the second sequence is used to indicate the time-frequency resources occupied by the second wireless signal and the redundant version adopted by the second wireless signal.

[0344] As an embodiment, the above sentence "the second sequence is used to indicate at least one of the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and the redundant version adopted by the second wireless signal" includes the following meaning: the second sequence is used to indicate the time-frequency resources occupied by the second wireless signal and the modulation and coding method adopted by the first wireless signal.

[0345] As an embodiment, the above sentence "the second sequence is used to indicate at least one of the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and the redundant version adopted by the second wireless signal" includes the following meaning: the second sequence is associated with the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and one of the redundant versions adopted by the second wireless signal.

[0346] As an embodiment, the above sentence "the second sequence is used to indicate at least one of the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and the redundant version adopted by the second wireless signal" includes the following meaning: the second sequence and the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and one of the redundant versions adopted by the second wireless signal are bound according to a mapping relationship.

[0347] As an embodiment, the above sentence "the second sequence is used to indicate at least one of the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and the redundant version adopted by the second wireless signal" includes the following meaning: there is a mapping relationship between the second sequence and the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and one of the redundant versions adopted by the second wireless signal.

[0348] As an embodiment, the above sentence "the second sequence is used to indicate at least one of the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and the redundant version adopted by the second wireless signal" includes the following meaning: the second sequence is used to directly indicate at least one of the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and the redundant version adopted by the second wireless signal.

[0349] As an embodiment, the above sentence "the second sequence is used to indicate at least one of the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and the redundant version adopted by the second wireless signal" includes the following meaning: the second sequence is used to indirectly indicate at least one of the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and the redundant version adopted by the second wireless signal.

[0350] As an embodiment, the above sentence "the second sequence is used to indicate at least one of the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and the redundant version adopted by the second wireless signal" includes the following meaning: the second sequence is used to explicitly indicate at least one of the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and the redundant version adopted by the second wireless signal.

[0351] As an embodiment, the above sentence "the second sequence is used to indicate at least one of the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and the redundant version adopted by the second wireless signal" includes the following meaning: the second sequence is used to implicitly indicate at least one of the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and the redundant version adopted by the second wireless signal.

[0352] As an embodiment, the second sequence and the second wireless signal together constitute MsgA (message A).

[0353] As an embodiment, the second sequence and the second wireless signal both belong to MsgA (message A).

[0354] As an embodiment, the second sequence and the second wireless signal both belong to MsgA (Message A) in 2-Step random access.

[0355] As an embodiment, the high-layer information carried by the first wireless signal and the second wireless signal is the same.

[0356] As an embodiment, the high-layer information carried by the first wireless signal and the second wireless signal is different.

[0357] Example 7

[0358] Embodiment 7 illustrates a schematic diagram of the relationship between the target time length and the first time length according to an embodiment of the present application, as shown in the attached figure. Figure 7 As shown in the attached Figure 7 In the figure, the horizontal axis represents time, the rectangle filled with oblique lines represents the first sequence, the rectangle filled with cross lines represents the first information, the rectangle filled with cross lines represents the second sequence, and the rectangle with dotted lines represents the second wireless signal that may be transmitted.

[0359] In Example 7, the first communication node in the present application first sends a first sequence; then receives first information, the first information is used to determine X alternative time lengths, where X is a positive integer greater than 1; then sends a second sequence and determines whether to send a second wireless signal; wherein the time interval between the sending time of the first sequence and the sending time of the second sequence is not less than the target time length; the first time length is equal to one of the X alternative time lengths, and the target time length is not greater than the first time length; if the first time length is greater than 0, the first communication node randomly selects the target time length from the interval of 0 to the first time length; if the first time length is equal to 0, the target time length is equal to 0; whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths.

[0360] As an embodiment, the length of the time interval from the moment when the random access process using the first sequence as the preamble sequence is determined to be not completed to the moment when the random access process using the second sequence as the preamble sequence is initiated is not less than the target time length.

[0361] As an embodiment, the length of the time interval from the moment when the random access process using the first sequence as the leading sequence is determined to be not completed to the starting moment when the random access resource selection is initiated in the random access process using the second sequence as the leading sequence is not less than the target time length.

[0362] As an embodiment, the length of the time interval from the starting moment of initiating random access resource selection in the random access process using the first sequence as the leading sequence to the starting moment of initiating random access resource selection in the random access process using the second sequence as the leading sequence is not less than the target time length.

[0363] As an embodiment, the time interval from the deadline for sending the first information to the start time for sending the second sequence is not less than the target time length.

[0364] As an embodiment, the time domain resources occupied by the first information belong to a first time window, and the time interval from the end time of the first time window to the start time of sending the second sequence is not less than the target time length.

[0365] As an embodiment, the time domain resources occupied by the first information belong to a first time window, and the time interval from the start time of the first time window to the start time of sending the second sequence is not less than the target time length.

[0366] As an embodiment, the time domain resources occupied by the first information belong to a first time window, the first communication node assumes that the first information can only be received in the first time window, and the time interval from the end time of the first time window to the start time of sending the second sequence is not less than the target time length.

[0367] As an embodiment, the time domain resources occupied by the first information belong to the first time window, the first communication node assumes that the first information can only be received in the first time window, and the time interval from the start time of the first time window to the start time of sending the second sequence is not less than the target time length.

[0368] As an embodiment, the time domain resources occupied by the first information belong to a first time window, the first time window is a random access response time window (RAR Window), and the time interval from the start time of the first time window to the start time of sending the second sequence is not less than the target time length.

[0369] As an embodiment, the time domain resources occupied by the first information belong to a first time window, the first time window is a random access response time window (RAR Window), and the time interval from the end time of the first time window to the start time of sending the second sequence is not less than the target time length.

[0370] As an embodiment, the first information is a random access response (RAR or MsgB) for the first sequence, the random response time window (RAR Window or MsgB Monitoring Window) for the first sequence is a first time window, and the time interval from the end time of the first time window to the start time of sending the second sequence is not less than the target time length.

[0371] As an embodiment, the first information is a random access response (RAR or MsgB) for the first sequence, the random response time window (RAR Window or MsgB Monitoring Window) for the first sequence is a first time window, and the time interval from the start time of the first time window to the start time of sending the second sequence is not less than the target time length.

[0372] Example 8

[0373] Embodiment 8 illustrates a schematic diagram of a set of X time lengths in an embodiment of the present application, as shown in the attached figure. Figure 8 As shown in the attached Figure 8 In the figure, the first column from the left represents the index indicated by the first information, the second column from the left represents one time length set in the X time length sets, the third column from the left represents another time length set in the X time length sets, and the alternative time lengths in the X time length sets in the bold row with an index of 7 represent X alternative time lengths.

[0374] In Example 8, the X candidate time lengths in the present application belong to X time length sets respectively, and the first information in the present application is used to determine the X candidate time lengths from the X time length sets respectively; any one of the X time length sets includes a positive integer number of candidate time lengths greater than 1.

[0375] As an embodiment, each time length set in the X time length sets is predefined.

[0376] As an embodiment, each time length set in the X time length sets is fixed.

[0377] As an embodiment, one of the X time length sets is configurable.

[0378] As an embodiment, there are two different time length sets among the X time length sets.

[0379] As an embodiment, any two time length sets among the X time length sets are different.

[0380] As an embodiment, the candidate time lengths in any two time length sets in the X time length sets correspond one to one.

[0381] As an embodiment, there are candidate time lengths in two time length sets in one-to-one correspondence in the X time length sets.

[0382] As an embodiment, there is a one-to-one mapping relationship between the candidate time lengths in the X time length sets and the candidate time lengths in the two time length sets.

[0383] As an embodiment, the candidate time lengths in the X time length sets and the candidate time lengths in the two time length sets have a one-to-one functional operation relationship.

[0384] As an embodiment, the candidate time lengths in the X time length sets and the candidate time lengths in the two time length sets have a one-to-one corresponding proportional relationship.

[0385] As an embodiment, the candidate time lengths in any one of the X time length sets are indexed in sequence.

[0386] As an embodiment, the candidate time lengths in any one of the X time length sets are indexed in sequence, and the indexes of the X candidate time lengths in the time length sets to which they belong are equal.

[0387] As an embodiment, the X are any candidate time lengths in a time length set and are not less than 0.

[0388] As an embodiment, the above sentence "the first information is used to respectively determine the X alternative time lengths from the set of X time lengths" includes the following meaning: the first information is used by the first communication node to respectively determine the X alternative time lengths from the set of X time lengths.

[0389] As an embodiment, the above sentence "the first information is used to respectively determine the X candidate time lengths from the set of X time lengths" includes the following meaning: the first information is used to directly indicate the X candidate time lengths from the set of X time lengths.

[0390] As an embodiment, the above sentence "the first information is used to respectively determine the X candidate time lengths from the X time length sets" includes the following meaning: the first information is used to respectively indirectly indicate the X candidate time lengths from the X time length sets.

[0391] As an embodiment, the above sentence "the first information is used to respectively determine the X candidate time lengths from the set of X time lengths" includes the following meaning: the first information is used to implicitly indicate the X candidate time lengths from the set of X time lengths.

[0392] As an embodiment, the above sentence "the first information is used to respectively determine the X candidate time lengths from the set of X time lengths" includes the following meaning: the first information is used to explicitly indicate the X candidate time lengths from the set of X time lengths.

[0393] As an embodiment, the above sentence "the first information is used to respectively determine the X alternative time lengths from the X time length sets" includes the following meaning: the alternative time lengths in any one of the X time length sets are indexed in sequence, the indexes of the X alternative time lengths in the time length sets to which they belong are equal, and the first information indicates the indexes of the X alternative time lengths in the time length sets to which they belong.

[0394] As an embodiment, the above sentence "the first information is used to respectively determine the X alternative time lengths from the X time length sets" includes the following meaning: the alternative time lengths in any one of the X time length sets are indexed in sequence, and the indexes of the X alternative time lengths in the corresponding time length sets are respectively equal to the first index, and the first information indicates the first index.

[0395] As an embodiment, the above sentence "the first information is used to respectively determine the X candidate time lengths from the X time length sets" includes the following meaning: the candidate time lengths in any two time length sets in the X time length sets correspond one-to-one, and the first information indicates a third time length in the X candidate time lengths, and the third time length is an alternative time length in the X candidate time lengths; based on the one-to-one correspondence between the candidate time lengths in any two time length sets in the X time length sets, the first information is used to determine an alternative time length other than the third time length in the X candidate time lengths.

[0396] As an embodiment, one of the X time length sets is composed of backoff parameter values ​​(Backoff Parameter values) in Table 7.2-1 of Section 7.2 of 3GPP TS 38.321 (v15.3.0).

[0397] Example 9

[0398] Embodiment 9 illustrates a schematic diagram of Y air interface resource groups according to an embodiment of the present application, as shown in the attached figure. Fig. 9 As shown in the attached Fig. 9 In the figure, the horizontal axis represents the time domain, the horizontal axis represents the frequency domain, the vertical axis represents the code domain, the filled rectangle represents the first air interface resource block, each unfilled rectangle represents an air interface resource block other than the first air interface resource block in the Y air interface resource groups, and the numbers "1, 2, ..., f, ..., m, m+1, ..., Y" in the figure represent the indexes of the Y air interface resource groups.

[0399] In Example 9, the air interface resource occupied by the second sequence in the present application is the first air interface resource block, the first air interface resource block belongs to the first air interface resource group, the first air interface resource group is one of Y air interface resource groups, and Y is a positive integer greater than 1; whether the second wireless signal in the present application is sent is used to determine the first air interface resource group among the Y air interface resource groups.

[0400] As an embodiment, the first air interface resource block includes time-frequency resources and code domain resources.

[0401] As an embodiment, the first air interface resource block includes time-frequency resources.

[0402] As an embodiment, the first air interface resource block includes code domain resources.

[0403] As an embodiment, the first air interface resource block includes a characteristic sequence for generating the second sequence and a time-frequency resource for transmitting the second sequence.

[0404] As an embodiment, the first air interface resource block includes a characteristic sequence for generating the second sequence.

[0405] As an embodiment, the first air interface resource block includes the time-frequency resources occupied by the second sequence.

[0406] As an embodiment, the first air interface resource group includes a positive integer number of air interface resource blocks greater than 1.

[0407] As an embodiment, the first air interface resource group only includes the first air interface resource block.

[0408] As an embodiment, the first air interface resource group includes a positive integer number of air interface resource blocks greater than 1, and each air interface resource block included in the first air interface resource group includes time-frequency resources and code domain resources.

[0409] As an embodiment, the first air interface resource group includes a positive integer number of air interface resource blocks greater than 1, and each air interface resource block included in the first air interface resource group includes time-frequency resources.

[0410] As an embodiment, the first air interface resource group includes a positive integer number of air interface resource blocks greater than 1, and each air interface resource block included in the first air interface resource group includes a code domain resource.

[0411] As an embodiment, the Y air interface resource groups are obtained by grouping (Partition) all air interface resources that can be used for PRACH (Physical Random Access Channel) transmission.

[0412] As an embodiment, the Y air interface resource groups are obtained by grouping (Partition) all code domain resources that can be used for PRACH (Physical Random Access Channel) transmission.

[0413] As an embodiment, the Y air interface resource groups are obtained by grouping (Partition) all configured preamble sequences (Preamble).

[0414] As an embodiment, any two air interface resource blocks in any two air interface resource groups among the Y air interface resource groups are orthogonal.

[0415] As an embodiment, any two air interface resource blocks in any two air interface resource groups in the Y air interface resource groups are non-overlapping.

[0416] As an embodiment, Y is equal to 2, and the air interface resource blocks in the Y air interface resource groups are used for 2-step random access and 4-step random access, respectively.

[0417] As an embodiment, Y is equal to 2, and the Y air interface resource groups are used for 2-step random access and 4-step random access respectively.

[0418] As an embodiment, the Y air interface resource groups are configurable.

[0419] As an embodiment, the Y air interface resource groups are predefined.

[0420] As an embodiment, the Y air interface resource groups are configured through a system information block (SIB, System Information Block).

[0421] As an embodiment, the first communication node device independently selects the first air interface resource in the first air interface resource group.

[0422] As an embodiment, the first communication node device randomly selects the first air interface resource in the first air interface resource group.

[0423] As an embodiment, the first communication node device randomly selects the first air interface resource in the first air interface resource group according to equal probability (Equal Probability).

[0424] As an embodiment, the above sentence "whether the second wireless signal is sent is used to determine the first air interface resource group among the Y air interface resource groups" includes the following meaning: whether the second wireless signal is sent is used by the first communication node to determine the first air interface resource group among the Y air interface resource groups.

[0425] As an embodiment, the above sentence "whether the second wireless signal is sent to determine the first air interface resource group among the Y air interface resource groups" includes the following meaning: whether the second wireless signal is sent to directly indicate the first air interface resource group among the Y air interface resource groups.

[0426] As an embodiment, the above sentence "whether the second wireless signal is sent to determine the first air interface resource group among the Y air interface resource groups" includes the following meaning: whether the second wireless signal is sent to indirectly indicate the first air interface resource group among the Y air interface resource groups.

[0427] As an embodiment, the above sentence "whether the second wireless signal is sent to determine the first air interface resource group among the Y air interface resource groups" includes the following meaning: whether the second wireless signal is sent to explicitly indicate the first air interface resource group among the Y air interface resource groups.

[0428] As an embodiment, the above sentence "whether the second wireless signal is sent and used to determine the first air interface resource group among the Y air interface resource groups" includes the following meaning: whether the second wireless signal is sent and used to implicitly indicate the first air interface resource group among the Y air interface resource groups.

[0429] As an embodiment, the above sentence "whether the second wireless signal is sent to determine the first air interface resource group among the Y air interface resource groups" includes the following meaning: whether the first communication node initiates two-step random access or initiates four-step random access to determine the first air interface resource group among the Y air interface resource groups.

[0430] As an embodiment, the above sentence "whether the second wireless signal is sent is used to determine the first air interface resource group among the Y air interface resource groups" includes the following meaning: only whether the second wireless signal is sent is used to determine the first air interface resource group among the Y air interface resource groups.

[0431] As an embodiment, the above sentence "whether the second wireless signal is sent is used to determine the first air interface resource group among the Y air interface resource groups" includes the following meaning: whether the second wireless signal is sent and other factors are used together to determine the first air interface resource group among the Y air interface resource groups.

[0432] As an embodiment, the above sentence "whether the second wireless signal is sent is used to determine the first air interface resource group among the Y air interface resource groups" includes the following meaning: Y is equal to 2, if the second wireless signal is sent, the first air interface resource group is one of the Y air interface resource groups, otherwise the first air interface resource group is another air interface resource group among the Y air interface resource groups.

[0433] As an embodiment, the above sentence "whether the second wireless signal is sent to determine the first air interface resource group among the Y air interface resource groups" includes the following meaning: Y is equal to 2, if the first communication node initiates two-step random access (2-Step RACH), the first air interface resource group is one of the Y air interface resource groups; if the first communication node initiates four-step random access (4-Step RACH), the first air interface resource group is another air interface resource group among the Y air interface resource groups.

[0434] As an embodiment, the above sentence "whether the second wireless signal is sent is used to determine the first air interface resource group among the Y air interface resource groups" includes the following meaning: whether the second wireless signal is sent and the state of the first communication node (RRC_IDLE, RRC_CONNECTED or RRC_INACTIVE) are used together to determine the first air interface resource group among the Y air interface resource groups.

[0435] As an embodiment, the above sentence "whether the second wireless signal is sent is used to determine the first air interface resource group among the Y air interface resource groups" includes the following meaning: whether the second wireless signal is sent and the triggering reason for sending the second sequence (beam failure recovery, handover or other) are used together to determine the first air interface resource group among the Y air interface resource groups.

[0436] Example 10

[0437] Embodiment 10 illustrates a schematic diagram of the relationship between the first time length and the second time length according to an embodiment of the present application, as shown in the attached figure. Fig.10 As shown in the attached Fig.10 In the figure, the first column from the left represents the index indicated by the first information, the second column from the left represents one of the X time length sets, the third column from the left represents another time length set in the X time length sets, the blackened item in the second column from the left (corresponding to index "6") is the second time length, the blackened item in the third column from the left (corresponding to index "6") is the first time length, and the first factor is equal to 32 / 80=0.4.

[0438] In Embodiment 10, the second time length is equal to an alternative time length other than the first time length in the present application among the X alternative time lengths in the present application, and the first time length is equal to the product of the second time length and a first factor; the first factor is fixed, or the first factor is configurable.

[0439] As an embodiment, the time length set in the X time length sets in the present application to which the first time length belongs is a first time length set, the time length set in the X time length sets in the present application to which the second time length belongs is a second time length set, the alternative time lengths in the first time length set and the alternative time lengths in the second time length set correspond one-to-one, and any alternative time length in the first time length set is equal to the product of the corresponding alternative time length in the second time length set and the first factor.

[0440] As an embodiment, the first time length is greater than the second time length.

[0441] As an embodiment, the first time length is equal to the second time length.

[0442] As an embodiment, the first time length is not equal to the second time length.

[0443] As an embodiment, the first time length is shorter than the second time length.

[0444] As an embodiment, the unit of the second time length is millisecond (ms).

[0445] As an embodiment, the second time length is expressed as the number of time slots.

[0446] As an embodiment, the second time length is expressed as the number of multi-carrier symbols (OFDM symbols).

[0447] As an embodiment, the second time length is expressed as the number of subframes.

[0448] As an embodiment, the first factor is greater than or equal to 0.

[0449] As an embodiment, the first factor is equal to 0.

[0450] As an embodiment, the first factor is less than 1.

[0451] As an embodiment, the first factor is equal to 1.

[0452] As an embodiment, the first factor is greater than 1.

[0453] As an embodiment, the first factor is greater than or equal to 1.

[0454] As an embodiment, the first factor is less than or equal to 1.

[0455] As an embodiment, the first factor is a non-negative real number.

[0456] As an embodiment, the above sentence “the first factor is fixed” includes the following meaning: the value of the first factor is unchanged.

[0457] As an embodiment, the above sentence “the first factor is fixed” includes the following meaning: the value of the first factor is predefined in the protocol.

[0458] As an embodiment, the above sentence “the first factor is fixed” includes the following meaning: the value of the first factor is hardcoded.

[0459] As an embodiment, the sentence “the first factor is configurable” includes the following meaning: the first receiver further receives third information, wherein the third information is used to indicate the first factor.

[0460] As an embodiment, the above sentence "the first factor is configurable" includes the following meaning: the first receiver also receives third information, wherein the third information is used to indicate the first factor, and the third information is a system information block (SIB, System Information Block).

[0461] As an embodiment, the sentence “the first factor is configurable” includes the following meaning: the first receiver also receives third information, wherein the third information is used to indicate the first factor, and the third information is high-level broadcast information.

[0462] As an embodiment, the above sentence "the first factor is configurable" includes the following meaning: the first receiver also receives third information, wherein the third information is used to indicate the first factor, and the third information is all or part of an RRC (Radio Resource Control) signaling.

[0463] As an embodiment, the above sentence "the first factor is configurable" includes the following meaning: the first receiver also receives third information, wherein the third information is used to determine the number of preamble sequences (Preamble) available for 2-step random access and the number of preamble sequences (Preamble) available for 4-step random access, and the first factor is equal to the ratio of the number of preamble sequences (Preamble) available for the 2-step random access to the number of preamble sequences (Preamble) available for the 4-step random access.

[0464] As an embodiment, the above sentence "the first factor is configurable" includes the following meaning: the first receiver also receives third information, wherein the third information is used to determine the number of preamble sequences (Preamble) available for 2-step random access and the number of preamble sequences (Preamble) available for 4-step random access, and the first factor is proportional to the ratio of the number of preamble sequences (Preamble) available for 2-step random access and the number of preamble sequences (Preamble) available for 4-step random access.

[0465] As an embodiment, the above sentence "the first factor is configurable" includes the following meaning: the first receiver also receives third information, wherein the third information is used to determine the number of preamble sequences (Preamble) available for 2-step random access and the number of preamble sequences (Preamble) available for 4-step random access, and the first factor is inversely proportional to the ratio of the number of preamble sequences (Preamble) available for 2-step random access and the number of preamble sequences (Preamble) available for 4-step random access.

[0466] As an embodiment, the above sentence "the first factor is configurable" includes the following meaning: the first receiver also receives third information, wherein the second air interface resource group is an air interface resource group other than the first air interface resource group in the present application among the Y air interface resource groups in the present application, and the third information is used to determine the first air interface resource group and the second air interface resource group in the present application, and the first factor is equal to the ratio of the number of air interface resource blocks included in the first air interface resource group to the number of air interface resource blocks included in the second air interface resource.

[0467] As an embodiment, the above sentence "the first factor is configurable" includes the following meaning: the first receiver also receives third information, wherein the second air interface resource group is an air interface resource group other than the first air interface resource group in the present application among the Y air interface resource groups in the present application, and the third information is used to determine the first air interface resource group and the second air interface resource group in the present application, and the first factor is proportional to the ratio of the number of air interface resource blocks included in the first air interface resource group to the number of air interface resource blocks included in the second air interface resource.

[0468] As an embodiment, the above sentence "the first factor is configurable" includes the following meaning: the first receiver also receives third information, wherein the second air interface resource group is an air interface resource group other than the first air interface resource group in the present application among the Y air interface resource groups in the present application, and the third information is used to determine the first air interface resource group and the second air interface resource group in the present application, and the first factor is inversely proportional to the ratio of the number of air interface resource blocks included in the first air interface resource group to the number of air interface resource blocks included in the second air interface resource.

[0469] Embodiment 11

[0470] Embodiment 11 illustrates a schematic diagram of the relationship between the first information and the second information according to an embodiment of the present application, as shown in the attached figure. Fig.11 As shown in the attached Fig.11 In the figure, the first column from the left represents the index indicated by the first information, the second column from the left represents the time length set in the X time length sets corresponding to the first information, the third column from the left represents the index indicated by the second information, the fourth column from the left represents the time length set in the X time length sets corresponding to the second information, the black item in the second column from the left (corresponding to the index "7" indicated by the first information) is the alternative time length in the X alternative time lengths determined by the first information, and the black item in the fourth column from the left (corresponding to the index "5" indicated by the second information) is the alternative time length in the X alternative time lengths determined by the second information.

[0471] As an embodiment, the second information is transmitted via high-layer signaling.

[0472] As an embodiment, the second information is transmitted via physical layer signaling.

[0473] As an embodiment, the second information includes all or part of a high-layer signaling.

[0474] As an embodiment, the second information includes all or part of a physical layer signaling.

[0475] As an embodiment, the second information includes all or part of an IE (Information Element) in an RRC (Radio Resource Control) signaling.

[0476] As an embodiment, the second information includes all or part of a field in an IE (Information Element) in an RRC (Radio Resource Control) signaling.

[0477] As an embodiment, the second information includes all or part of a field in a MAC (Medium Access Control) layer signaling.

[0478] As an embodiment, the second information includes all or part of a MAC (Medium Access Control) CE (Control Element).

[0479] As an embodiment, the second information includes all or part of a MAC (Medium Access Control) header.

[0480] As an embodiment, the second information includes all or part of a MAC payload in a RAR (Random Access Response).

[0481] As an embodiment, the second information includes all or part of a MAC PDU (Protocol Data Unit) in a RAR (Random Access Response).

[0482] As an embodiment, the second information includes all or part of a subheader in a RAR (Random Access Response).

[0483] As an embodiment, the second information includes all or part of a MAC CE (Control Element) in a RAR (Random Access Response).

[0484] As an embodiment, the second information includes all or part of a Msg4 (message 4).

[0485] As an embodiment, the second information includes all or part of Msg4 in a 4-step random access.

[0486] As an embodiment, the second information includes all or part of MsgB (message B) in two-step random access (2-Step RACH).

[0487] As an embodiment, the second information includes all or part of the MAC payload in MsgB (message B) in two-step random access (2-Step RACH).

[0488] As an embodiment, the second information includes all or part of the MAC PDU (Protocol Data Unit) in MsgB (Message B) in two-step random access (2-Step RACH).

[0489] As an embodiment, the second information includes all or part of the MAC SDU (Service Data Unit) in MsgB (Message B) in two-step random access (2-Step RACH).

[0490] As an embodiment, the second information includes all or part of a subheader (Subheader) in MsgB (Message B) in two-step random access (2-Step RACH).

[0491] As an embodiment, the second information includes all or part of a MAC CE (Control Element) in MsgB (Message B) in two-step random access (2-Step RACH).

[0492] As an embodiment, the second information is transmitted via a DL-SCH (Downlink Shared Channel).

[0493] As an embodiment, the second information is transmitted via a PDSCH (Physical Downlink Shared Channel).

[0494] As an embodiment, the second information is transmitted via a PDSCH (Physical Downlink Shared Channel), and RA-RNTI (Random Access Radio Network Temporary Identity) is used to generate an initial value of a generator of a scrambling code sequence for the PDSCH carrying the second information.

[0495] As an embodiment, the second information is transmitted via a PDSCH (Physical Downlink Shared Channel), and TC-RNTI (Temporary Cell Radio Network Temporary Identity) is used to generate an initial value of a generator of a scrambling code sequence for the PDSCH carrying the second information.

[0496] As an embodiment, the second information is transmitted via a PDSCH (Physical Downlink Shared Channel), and an identifier other than RA-RNTI (Random Access Radio Network Temporary Identity) and TC-RNTI (Temporary Cell Radio Network Temporary Identity) is used to generate an initial value of a generator for a scrambling code sequence of the PDSCH carrying the second information.

[0497] As an embodiment, the second information is transmitted via a PDSCH (Physical Downlink Shared Channel), and MsgB-RNTI (Message B Radio Network Temporary Identifier) ​​is used to generate an initial value of a generator of a scrambling code sequence of the PDSCH carrying the second information.

[0498] As an embodiment, the second information is broadcast.

[0499] As an embodiment, the second information is unicast.

[0500] As an embodiment, the second information is multicast (Groupcast)

[0501] As an embodiment, the second information is cell specific (Cell Specific).

[0502] As an embodiment, the second information is user equipment-specific (UE-specific).

[0503] As an embodiment, the second information is user equipment group-specific (UE group-specific).

[0504] As an embodiment, the second information is transmitted via PDCCH (Physical Downlink Control Channel, narrowband physical downlink control channel).

[0505] As an embodiment, the second information includes all or part of a field (Field) of a DCI (Downlink Control Information) signaling.

[0506] As an embodiment, the first information and the second information in the present application are transmitted through the same PDSCH (Physical Downlink Shared Channel).

[0507] As an embodiment, the first information and the second information in the present application are transmitted through different PDSCHs (Physical Downlink Shared Channels).

[0508] As an embodiment, the first information and the second information in the present application are transmitted through the same MAC PDU.

[0509] As an embodiment, the first information and the second information in the present application are transmitted through different MAC PDUs.

[0510] As an embodiment, the first information and the second information in the present application are in the same MAC subheader.

[0511] As an embodiment, the first information and the second information in the present application are in different MAC subheaders.

[0512] As an embodiment, one of the first information and the second information in the present application is carried by a MAC subheader, and the other is carried by a MAC CE.

[0513] As an embodiment, one of the first information and the second information in the present application is carried through a MAC subheader, and the other is carried through a MAC SDU.

[0514] As an embodiment, the above sentence "the first information and the second information are used to respectively determine the X alternative time lengths" includes the following meaning: the first information is used to determine one of the X alternative time lengths, and the second information is used to determine another alternative time length of the X alternative time lengths.

[0515] As an embodiment, the above sentence "the first information and the second information are used to respectively determine the X alternative time lengths" includes the following meaning: the first information and the second information are used by the first communication node device to respectively determine the X alternative time lengths.

[0516] As an embodiment, the above sentence "the first information and the second information are used to respectively determine the X candidate time lengths" includes the following meaning: the first information and the second information are used to directly indicate the X candidate time lengths respectively.

[0517] As an embodiment, the above sentence "the first information and the second information are used to respectively determine the X candidate time lengths" includes the following meaning: the first information and the second information are used to respectively indirectly indicate the X candidate time lengths.

[0518] As an embodiment, the above sentence "the first information and the second information are used to respectively determine the X candidate time lengths" includes the following meaning: the first information and the second information are used to respectively and explicitly indicate the X candidate time lengths.

[0519] As an embodiment, the above sentence "the first information and the second information are used to respectively determine the X candidate time lengths" includes the following meaning: the first information and the second information are used to respectively implicitly indicate the X candidate time lengths.

[0520] As an embodiment, the second information is transmitted via an air interface.

[0521] As an embodiment, the second information is transmitted via a wireless interface.

[0522] As an embodiment, the second information is transmitted via a wireless channel.

[0523] As an embodiment, the second information is transmitted via the Uu interface.

[0524] As an embodiment, the second information is transmitted through an interface between the second communication node and the first communication node in the present application.

[0525] Example 12

[0526] Embodiment 12 illustrates a structural block diagram of a processing device in a first communication node device, as shown in the attached figure. Fig.12 Attached Fig.12In the embodiment, the first communication node device processing device 1200 includes a first transmitter 1201, a first receiver 1202 and a second transmitter 1203. The first transmitter 1201 includes the Figure 4 The transmitter / receiver 456 (including the antenna 460), the transmission processor 455 and the controller / processor 490 in the first receiver 1202 include the attached application Figure 4 The transmitter / receiver 456 (including the antenna 460), the receiving processor 452 and the controller / processor 490 in the present application; the second transmitter 1203 includes the attached Figure 4 The transmitter / receiver 456 (including the antenna 460), the transmit processor 455 and the controller / processor 490.

[0527] In Example 12, a first transmitter 1201 sends a first sequence; a first receiver 1202 receives first information, and the first information is used to determine X alternative time lengths, where X is a positive integer greater than 1; a second transmitter 1203 sends a second sequence and determines whether to send a second wireless signal; wherein the time interval between the sending moment of the first sequence and the sending moment of the second sequence is not less than a target time length; a first time length is equal to one of the X alternative time lengths, and the target time length is not greater than the first time length; if the first time length is greater than 0, the first communication node device randomly selects the target time length from the interval from 0 to the first time length; if the first time length is equal to 0, the target time length is equal to 0; whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths.

[0528] As an embodiment, the first transmitter 1201 also sends a first wireless signal, and the first sequence is used to indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal.

[0529] As an embodiment, the X candidate time lengths belong to X time length sets respectively, and the first information is used to determine the X candidate time lengths respectively from the X time length sets; any one of the X time length sets includes a positive integer number of candidate time lengths greater than 1.

[0530] As an embodiment, the air interface resource occupied by the second sequence is a first air interface resource block, the first air interface resource block belongs to a first air interface resource group, the first air interface resource group is one of Y air interface resource groups, and Y is a positive integer greater than 1; whether the second wireless signal is sent is used to determine the first air interface resource group among the Y air interface resource groups.

[0531] As an embodiment, the second transmitter 1203 also sends a second wireless signal; the second sequence is used to indicate at least one of the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and the redundant version adopted by the second wireless signal.

[0532] As an embodiment, the second time length is equal to an alternative time length other than the first time length among the X alternative time lengths, and the first time length is equal to the product of the second time length and a first factor; the first factor is fixed, or the first factor is configurable.

[0533] As an embodiment, the first receiver 1202 further receives second information, where the first information and the second information are used to determine the X candidate time lengths respectively, where X is equal to 2.

[0534] Embodiment 13

[0535] Embodiment 13 illustrates a structural block diagram of a processing device in a second communication node device, as shown in the attached figure. Fig.13 As shown in the attached Fig.13 In the embodiment, the second communication node device processing device 1300 includes a second receiver 1301, a third transmitter 1302 and a third receiver 1303. The second receiver 1301 includes the attached Figure 4 The transmitter / receiver 416 (including the antenna 420), the receiving processor 412 and the controller / processor 440 in the present application; the third transmitter 1302 includes Figure 4 The transmitter / receiver 416 (including the antenna 420), the transmission processor 415 and the controller / processor 440 in the third receiver 1303 include the attached Figure 4 The transmitter / receiver 416 (including the antenna 420), the receiving processor 412 and the controller / processor 440 in the embodiment.

[0536] In Example 13, a second receiver 1301 receives a first sequence; a third transmitter 1302 sends a first information, and the first information is used to determine X alternative time lengths, where X is a positive integer greater than 1; a third receiver 1303 receives a second sequence and determines whether a second wireless signal is sent; wherein the time interval between the sending moment of the first sequence and the sending moment of the second sequence is not less than a target time length; the first time length is equal to one of the X alternative time lengths, and the target time length is not greater than the first time length; if the first time length is greater than 0, the sender of the first sequence randomly selects the target time length from the interval of 0 to the first time length; if the first time length is equal to 0, the target time length is equal to 0; whether the second wireless signal is sent is used to determine the first time length among the X alternative time lengths.

[0537] As an embodiment, the second receiver 1301 also receives a first wireless signal, and the first sequence is used to indicate at least one of the time-frequency resources occupied by the first wireless signal, the modulation and coding method adopted by the first wireless signal, and the redundant version adopted by the first wireless signal.

[0538] As an embodiment, the X candidate time lengths belong to X time length sets respectively, and the first information is used to determine the X candidate time lengths respectively from the X time length sets; any one of the X time length sets includes a positive integer number of candidate time lengths greater than 1.

[0539] As an embodiment, the air interface resource occupied by the second sequence is a first air interface resource block, the first air interface resource block belongs to a first air interface resource group, the first air interface resource group is one of Y air interface resource groups, and Y is a positive integer greater than 1; whether the second wireless signal is sent is used to determine the first air interface resource group among the Y air interface resource groups.

[0540] As an embodiment, the third receiver 1303 also receives a second wireless signal; the second sequence is used to indicate at least one of the time-frequency resources occupied by the second wireless signal, the modulation and coding method adopted by the second wireless signal, and the redundant version adopted by the second wireless signal.

[0541] As an embodiment, the second time length is equal to an alternative time length other than the first time length among the X alternative time lengths, and the first time length is equal to the product of the second time length and a first factor; the first factor is fixed, or the first factor is configurable.

[0542] As an embodiment, the third transmitter 1302 further sends second information, and the first information and the second information are used to determine the X candidate time lengths respectively, where X is equal to 2.

[0543] A person of ordinary skill in the art can understand that all or part of the steps in the above method can be completed by instructing the relevant hardware through a program, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a hard disk or an optical disk. Optionally, all or part of the steps in the above embodiment can also be implemented using one or more integrated circuits. Accordingly, each module unit in the above embodiment can be implemented in the form of hardware or in the form of a software function module, and the present application is not limited to any specific form of software and hardware combination. The first type of communication node device or UE or terminal in the present application includes but is not limited to mobile phones, tablet computers, notebooks, Internet cards, low-power devices, eMTC devices, NB-IoT devices, vehicle-mounted communication equipment, aircraft, airplanes, drones, remote-controlled aircraft and other wireless communication devices. The second type of communication node device or base station or network side device in the present application includes but is not limited to macrocellular base stations, microcellular base stations, home base stations, relay base stations, eNBs, gNBs, transmission and receiving nodes TRPs, relay satellites, satellite base stations, aerial base stations and other wireless communication devices.

[0544] The above is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A first communication node device for wireless communication, characterized in that: include: A first transmitter sends a first sequence; A first receiver receives first information, where the first information is used to determine one candidate time length among X candidate time lengths, where X is a positive integer greater than 1, and one candidate time length among the X candidate time lengths is equal to 0; A second transmitter sends a second sequence and determines whether to initiate a 2-step random access or a 4-step random access, wherein the second sequence is a preamble sequence in re-initiating random access; Among them, the time interval from the moment when the random access process using the first sequence as the preamble sequence is determined to be incomplete to the starting moment when random access resource selection is initiated in the random access process using the second sequence as the preamble sequence is not less than the target time length, and the target time length is equal to a back-off time; the first time length is equal to one of the X alternative time lengths, and the target time length is not greater than the first time length; if the first time length is greater than 0, the first communication node device randomly selects the target time length from the interval of 0 to the first time length according to a uniform probability distribution; if the first time length is equal to 0, the target time length is equal to 0; the first sequence is the preamble sequence (Preamble) in MsgA (message A) in 2-step random access, and the random access process using the first sequence as the preamble sequence is not successful or not completed; if the first communication node initiates 2-step random access, the first time length is equal to one of the X alternative time lengths; if the first communication node initiates 4-step random access, the first time length is equal to another alternative time length among the X alternative time lengths.

2. The first communication node device according to claim 1, characterized in that: The first transmitter also sends a first wireless signal, and there is a mapping relationship between the first sequence and the time-frequency resources occupied by the first wireless signal; the first sequence and the first wireless signal both belong to MsgA in 2-step random access, and the first wireless signal includes PUSCH and DMRS.

3. The first communication node device according to claim 2, characterized in that: A transmission block is sequentially subjected to CRC addition, segmentation, coding block level CRC addition, channel coding, rate matching, concatenation, scrambling, modulation, layer mapping, precoding, mapping to virtual resource blocks, mapping from virtual resource blocks to physical resource blocks, OFDM baseband signal generation, modulation and up-conversion to obtain the first wireless signal; or a transmission block is sequentially subjected to CRC addition, segmentation, coding block level CRC addition, channel coding, rate matching, concatenation, scrambling, modulation, layer mapping, transform precoding, precoding, mapping to virtual resource blocks, mapping from virtual resource blocks to physical resource blocks, OFDM baseband signal generation, modulation and up-conversion to obtain the first wireless signal.

4. The first communication node device according to any one of claims 1 to 3, characterized in that: The air interface resource occupied by the second sequence is the first air interface resource block, the first air interface resource block belongs to the first air interface resource group, the first air interface resource group is one of Y air interface resource groups, Y is a positive integer greater than 1, and the Y air interface resource groups are configured through system information blocks; whether the first communication node initiates 2-step random access or 4-step random access is used to determine the first air interface resource group among the Y air interface resource groups.

5. The first communication node device according to claim 4, characterized in that: Whether the first communication node device initiates a 2-step random access or a 4-step random access and a triggering cause for sending the second sequence are used together to determine the first air interface resource group among the Y air interface resource groups.

6. The first communication node device according to claim 4 or 5, characterized in that: The first communication node device randomly selects the first air interface resource block in the first air interface resource group according to equal probability (Equal Probability).

7. The first communication node device according to any one of claims 4 to 6, characterized in that: The first air interface resource block includes a characteristic sequence for generating the second sequence and / or a time-frequency resource for transmitting the second sequence, and any two air interface resource blocks in any two air interface resource groups in the Y air interface resource groups are orthogonal.

8. The first communication node device according to any one of claims 1 to 7, characterized in that: The second transmitter also sends a second wireless signal; there is a mapping relationship between the time-frequency resources occupied by the second sequence and the second wireless signal; the second sequence and the second wireless signal both belong to MsgA in 2-step random access, and the second wireless signal includes PUSCH and DMRS; the time domain resources occupied by the first information belong to the first time window, and the time interval from the end time of the first time window to the start time of sending the second sequence is not less than the target time length.

9. The first communication node device according to claim 8, characterized in that: A transport block is sequentially subjected to CRC addition, segmentation, coding block-level CRC addition, channel coding, rate matching, concatenation, scrambling, modulation, layer mapping, precoding, mapping to a virtual resource block, mapping from a virtual resource block to a physical resource block, OFDM baseband signal generation, and modulation and up-conversion to obtain the second wireless signal; or a transport block is sequentially subjected to CRC addition, segmentation, coding block-level CRC addition, channel coding, rate matching, concatenation, scrambling, modulation, layer mapping, transform precoding, precoding, mapping to a virtual resource block, mapping from a virtual resource block to a physical resource block, OFDM baseband signal generation, and modulation and up-conversion to obtain the second wireless signal.

10. The first communication node device according to claim 8 or 9, characterized in that: The first information is MsgB for the first sequence, and the monitoring time window for MsgB of the first sequence is the first time window.

11. The first communication node device according to any one of claims 1 to 10, characterized in that: The first receiver also receives second information, where the first information and the second information are used to determine the X candidate time lengths respectively, where X is equal to 2; the second information includes all or part of the fields in an information unit in an RRC signaling.

12. The first communication node device according to any one of claims 1 to 11, characterized in that: The first information is transmitted via a PDSCH, and MsgB-RNTI is used to generate an initial value of a generator of a scrambling code sequence of the PDSCH carrying the first information.

13. The first communication node device according to any one of claims 1 to 12, characterized in that: The first communication node device is in an RRC connected state (RRC_CONNECTED), or the first communication node device is in an RRC inactive state (RRC_INACTIVE).

14. The first communication node device according to any one of claims 1 to 13, characterized in that: The first sequence is a Zadoff-Chu (ZC) sequence with a length of 839 or 139, and the first sequence is transmitted via PRACH; the second sequence is a Zadoff-Chu (ZC) sequence with a length of 839 or 139, and the second sequence is transmitted via PRACH.

15. The first communication node device according to any one of claims 1 to 14, characterized in that: The first information includes all or part of a subheader in MsgB (message B) in two-step random access, or the first information includes all or part of a field in an information unit in an RRC signaling.

16. A second communication node device used in wireless communication, characterized in that: include: A second receiver receives the first sequence; A third transmitter sends first information, where the first information is used to determine one candidate time length among X candidate time lengths, where X is a positive integer greater than 1, and one candidate time length among the X candidate time lengths is equal to 0; a third receiver, receiving a second sequence and determining whether it is a 2-step random access or a 4-step random access, wherein the second sequence is a preamble sequence in re-initiating random access; Among them, the time interval from the moment when the random access process using the first sequence as the preamble sequence is determined to be incomplete to the starting moment when random access resource selection is initiated in the random access process using the second sequence as the preamble sequence is not less than the target time length, and the target time length is equal to a back-off time; the first time length is equal to one of the X candidate time lengths, and the target time length is not greater than the first time length; if the first time length is greater than 0, the sender of the first sequence randomly selects the target time length from 0 to the first time length according to a uniform probability distribution; if the first time length is equal to 0, the target time length is equal to 0; the first sequence is a preamble sequence (Preamble) in MsgA (message A) in 2-step random access, and the random access process using the first sequence as the preamble sequence is not successful or not completed; whether the sender of the first sequence initiates 2-step random access or 4-step random access is used to determine the first time length in the X candidate time lengths.

17. The second communication node device according to claim 16, characterized in that: The second receiver receives a first wireless signal, and there is a mapping relationship between the first sequence and the time-frequency resources occupied by the first wireless signal; the first sequence and the first wireless signal both belong to MsgA in 2-step random access, and the first wireless signal includes PUSCH and DMRS.

18. The second communication node device according to claim 17, characterized in that: A transmission block is sequentially subjected to CRC addition, segmentation, coding block level CRC addition, channel coding, rate matching, concatenation, scrambling, modulation, layer mapping, precoding, mapping to virtual resource blocks, mapping from virtual resource blocks to physical resource blocks, OFDM baseband signal generation, modulation and up-conversion to obtain the first wireless signal; or a transmission block is sequentially subjected to CRC addition, segmentation, coding block level CRC addition, channel coding, rate matching, concatenation, scrambling, modulation, layer mapping, transform precoding, precoding, mapping to virtual resource blocks, mapping from virtual resource blocks to physical resource blocks, OFDM baseband signal generation, modulation and up-conversion to obtain the first wireless signal.

19. The second communication node device according to any one of claims 16 to 18, characterized in that: The air interface resource occupied by the second sequence is the first air interface resource block, the first air interface resource block belongs to the first air interface resource group, the first air interface resource group is one of Y air interface resource groups, Y is a positive integer greater than 1, and the Y air interface resource groups are configured through system information blocks; whether the sender of the first sequence initiates 2-step random access or 4-step random access is used to determine the first air interface resource group among the Y air interface resource groups.

20. The second communication node device according to claim 19, characterized in that: Whether the sender of the first sequence initiates 2-step random access or 4-step random access and the triggering cause for sending the second sequence are used together to determine the first air interface resource group among the Y air interface resource groups.

21. The second communication node device according to claim 19 or 20, characterized in that: The sender of the first sequence randomly selects the first air interface resource block in the first air interface resource group according to equal probability (Equal Probability).

22. The second communication node device according to any one of claims 19 to 21, characterized in that: The first air interface resource block includes a characteristic sequence for generating the second sequence and / or a time-frequency resource for transmitting the second sequence, and any two air interface resource blocks in any two air interface resource groups in the Y air interface resource groups are orthogonal.

23. The second communication node device according to any one of claims 16 to 22, characterized in that: The third receiver receives a second wireless signal; there is a mapping relationship between the time-frequency resources occupied by the second sequence and the second wireless signal; the second sequence and the second wireless signal both belong to MsgA in 2-step random access, and the second wireless signal includes PUSCH and DMRS; the time domain resources occupied by the first information belong to the first time window, and the time interval from the end time of the first time window to the start time of sending the second sequence is not less than the target time length.

24. The second communication node device according to claim 23, characterized in that: A transport block is sequentially subjected to CRC addition, segmentation, coding block-level CRC addition, channel coding, rate matching, concatenation, scrambling, modulation, layer mapping, precoding, mapping to a virtual resource block, mapping from a virtual resource block to a physical resource block, OFDM baseband signal generation, and modulation and up-conversion to obtain the second wireless signal; or a transport block is sequentially subjected to CRC addition, segmentation, coding block-level CRC addition, channel coding, rate matching, concatenation, scrambling, modulation, layer mapping, transform precoding, precoding, mapping to a virtual resource block, mapping from a virtual resource block to a physical resource block, OFDM baseband signal generation, and modulation and up-conversion to obtain the second wireless signal.

25. The second communication node device according to claim 23 or 24, characterized in that: The first information is MsgB for the first sequence, and the monitoring time window for MsgB of the first sequence is the first time window.

26. The second communication node device according to any one of claims 16 to 25, characterized in that: The third transmitter sends second information, where the first information and the second information are used to determine the X candidate time lengths respectively, where X is equal to 2; and the second information includes all or part of a field in an information unit in an RRC signaling.

27. The second communication node device according to any one of claims 16 to 26, characterized in that: The first information is transmitted via a PDSCH, and MsgB-RNTI is used to generate an initial value of a generator of a scrambling code sequence of the PDSCH carrying the first information.

28. The second communication node device according to any one of claims 16 to 27, characterized in that: The sender of the first sequence is in an RRC connected state (RRC_CONNECTED), or the sender of the first sequence is in an RRC inactive state (RRC_INACTIVE).

29. The second communication node device according to any one of claims 16 to 28, characterized in that: The first sequence is a Zadoff-Chu (ZC) sequence with a length of 839 or 139, and the first sequence is transmitted via PRACH; the second sequence is a Zadoff-Chu (ZC) sequence with a length of 839 or 139, and the second sequence is transmitted via PRACH.

30. The second communication node device according to any one of claims 16 to 29, characterized in that: The first information includes all or part of a subheader in MsgB (message B) in two-step random access, or the first information includes all or part of a field in an information unit in an RRC signaling.

31. A method in a first communication node in wireless communication, characterized in that: include: Send the first sequence; receiving first information, where the first information is used to determine one of X candidate time lengths, where X is a positive integer greater than 1, and one of the X candidate time lengths is equal to 0; sending a second sequence and determining whether to initiate a 2-step random access or a 4-step random access, wherein the second sequence is a preamble sequence in re-initiating random access; Among them, the time interval from the moment when the random access process with the first sequence as the preamble sequence is determined to be incomplete to the starting moment when random access resource selection is initiated in the random access process with the second sequence as the preamble sequence is not less than the target time length, and the target time length is equal to a back-off time; the first time length is equal to one of the X alternative time lengths, and the target time length is not greater than the first time length; if the first time length is greater than 0, the first communication node randomly selects the target time length from the interval of 0 to the first time length according to a uniform probability distribution; if the first time length is equal to 0, the target time length is equal to 0; the first sequence is the preamble sequence (Preamble) in MsgA (message A) in 2-step random access, and the random access process with the first sequence as the preamble sequence is not successful or not completed; whether the first communication node initiates 2-step random access or initiates 4-step random access is used to determine the first time length among the X alternative time lengths.

32. The method in the first communication node according to claim 31, characterized in that include: Sending a first wireless signal; There is a mapping relationship between the time-frequency resources occupied by the first sequence and the first wireless signal; the first sequence and the first wireless signal both belong to MsgA in 2-step random access, and the first wireless signal includes PUSCH and DMRS.

33. The method in the first communication node according to claim 32, characterized in that A transmission block is sequentially subjected to CRC addition, segmentation, coding block level CRC addition, channel coding, rate matching, concatenation, scrambling, modulation, layer mapping, precoding, mapping to virtual resource blocks, mapping from virtual resource blocks to physical resource blocks, OFDM baseband signal generation, modulation and up-conversion to obtain the first wireless signal; or a transmission block is sequentially subjected to CRC addition, segmentation, coding block level CRC addition, channel coding, rate matching, concatenation, scrambling, modulation, layer mapping, transform precoding, precoding, mapping to virtual resource blocks, mapping from virtual resource blocks to physical resource blocks, OFDM baseband signal generation, modulation and up-conversion to obtain the first wireless signal.

34. The method in the first communication node according to any one of claims 31 to 33, characterized in that: The air interface resource occupied by the second sequence is the first air interface resource block, the first air interface resource block belongs to the first air interface resource group, the first air interface resource group is one of Y air interface resource groups, Y is a positive integer greater than 1, and the Y air interface resource groups are configured through system information blocks; whether the first communication node initiates 2-step random access or 4-step random access is used to determine the first air interface resource group among the Y air interface resource groups.

35. The method in the first communication node according to claim 34, characterized in that Whether the first communication node device initiates a 2-step random access or a 4-step random access and a triggering cause for sending the second sequence are used together to determine the first air interface resource group among the Y air interface resource groups.

36. The method in the first communication node according to claim 34 or 35, characterized in that: The first communication node randomly selects the first air interface resource block in the first air interface resource group according to equal probability (Equal Probability).

37. The method in the first communication node according to any one of claims 34 to 36, characterized in that: The first air interface resource block includes a characteristic sequence for generating the second sequence and / or a time-frequency resource for transmitting the second sequence, and any two air interface resource blocks in any two air interface resource groups in the Y air interface resource groups are orthogonal.

38. The method in the first communication node according to any one of claims 31 to 37, characterized in that: include: sending a second wireless signal; Among them, there is a mapping relationship between the time-frequency resources occupied by the second sequence and the second wireless signal; the second sequence and the second wireless signal both belong to MsgA in 2-step random access, and the second wireless signal includes PUSCH and DMRS; the time domain resources occupied by the first information belong to the first time window, and the time interval from the end time of the first time window to the start time of sending the second sequence is not less than the target time length.

39. The method in the first communication node according to claim 38, characterized in that A transport block is sequentially subjected to CRC addition, segmentation, coding block-level CRC addition, channel coding, rate matching, concatenation, scrambling, modulation, layer mapping, precoding, mapping to a virtual resource block, mapping from a virtual resource block to a physical resource block, OFDM baseband signal generation, and modulation and up-conversion to obtain the second wireless signal; or a transport block is sequentially subjected to CRC addition, segmentation, coding block-level CRC addition, channel coding, rate matching, concatenation, scrambling, modulation, layer mapping, transform precoding, precoding, mapping to a virtual resource block, mapping from a virtual resource block to a physical resource block, OFDM baseband signal generation, and modulation and up-conversion to obtain the second wireless signal.

40. The method in the first communication node according to claim 38 or 39, characterized in that: The first information is MsgB for the first sequence, and the monitoring time window for MsgB of the first sequence is the first time window.

41. The method in the first communication node according to any one of claims 31 to 40, characterized in that: include: receiving second information; The first information and the second information are used to determine the X candidate time lengths respectively, where X is equal to 2; The second information includes all or part of the fields in an information unit in an RRC signaling.

42. The method in the first communication node according to any one of claims 31 to 41, characterized in that: The first information is transmitted via a PDSCH, and MsgB-RNTI is used to generate an initial value of a generator of a scrambling code sequence of the PDSCH carrying the first information.

43. The method in the first communication node according to any one of claims 31 to 42, characterized in that: The first communication node is in an RRC connected state (RRC_CONNECTED), or the first communication node is in an RRC inactive state (RRC_INACTIVE).

44. The method in the first communication node according to any one of claims 31 to 43, characterized in that: The first sequence is a Zadoff-Chu (ZC) sequence with a length of 839 or 139, and the first sequence is transmitted via PRACH; the second sequence is a Zadoff-Chu (ZC) sequence with a length of 839 or 139, and the second sequence is transmitted via PRACH.

45. The method in the first communication node according to any one of claims 31 to 44, characterized in that: The first information includes all or part of a subheader in MsgB (message B) in two-step random access, or the first information includes all or part of a field in an information unit in an RRC signaling.

46. ​​A method in a second communication node in wireless communication, characterized in that: include: receiving a first sequence; Sending first information, where the first information is used to determine one candidate time length among X candidate time lengths, where X is a positive integer greater than 1, and one candidate time length among the X candidate time lengths is equal to 0; receiving a second sequence and determining whether it is a 2-step random access or a 4-step random access, wherein the second sequence is a preamble sequence in re-initiating random access; Among them, the time interval from the moment when the random access process using the first sequence as the preamble sequence is determined to be incomplete to the starting moment when random access resource selection is initiated in the random access process using the second sequence as the preamble sequence is not less than the target time length, and the target time length is equal to a back-off time; the first time length is equal to one of the X candidate time lengths, and the target time length is not greater than the first time length; if the first time length is greater than 0, the sender of the first sequence randomly selects the target time length from 0 to the first time length according to a uniform probability distribution; if the first time length is equal to 0, the target time length is equal to 0; the first sequence is a preamble sequence (Preamble) in MsgA (message A) in 2-step random access, and the random access process using the first sequence as the preamble sequence is not successful or not completed; whether the sender of the first sequence initiates 2-step random access or 4-step random access is used to determine the first time length in the X candidate time lengths.

47. The method in the second communication node according to claim 46, characterized in that: include: receiving a first wireless signal; There is a mapping relationship between the time-frequency resources occupied by the first sequence and the first wireless signal; the first sequence and the first wireless signal both belong to MsgA in 2-step random access, and the first wireless signal includes PUSCH and DMRS.

48. The method in the second communication node according to claim 47, characterized in that: A transmission block is sequentially subjected to CRC addition, segmentation, coding block level CRC addition, channel coding, rate matching, concatenation, scrambling, modulation, layer mapping, precoding, mapping to virtual resource blocks, mapping from virtual resource blocks to physical resource blocks, OFDM baseband signal generation, modulation and up-conversion to obtain the first wireless signal; or a transmission block is sequentially subjected to CRC addition, segmentation, coding block level CRC addition, channel coding, rate matching, concatenation, scrambling, modulation, layer mapping, transform precoding, precoding, mapping to virtual resource blocks, mapping from virtual resource blocks to physical resource blocks, OFDM baseband signal generation, modulation and up-conversion to obtain the first wireless signal.

49. The method in the second communication node according to any one of claims 46 to 48, characterized in that: The air interface resource occupied by the second sequence is the first air interface resource block, the first air interface resource block belongs to the first air interface resource group, the first air interface resource group is one of Y air interface resource groups, Y is a positive integer greater than 1, and the Y air interface resource groups are configured through system information blocks; whether the sender of the first sequence initiates 2-step random access or 4-step random access is used to determine the first air interface resource group among the Y air interface resource groups.

50. The method in the second communication node according to claim 49, characterized in that: Whether the sender of the first sequence initiates 2-step random access or 4-step random access and the triggering cause for sending the second sequence are used together to determine the first air interface resource group among the Y air interface resource groups.

51. The method in the second communication node according to claim 49 or 50, characterized in that: The sender of the first sequence randomly selects the first air interface resource block in the first air interface resource group according to equal probability (Equal Probability).

52. The method in the second communication node according to any one of claims 49 to 51, characterized in that: The first air interface resource block includes a characteristic sequence for generating the second sequence and / or a time-frequency resource for transmitting the second sequence, and any two air interface resource blocks in any two air interface resource groups in the Y air interface resource groups are orthogonal.

53. The method in the second communication node according to any one of claims 46 to 52, characterized in that: include: receiving a second wireless signal; Among them, there is a mapping relationship between the time-frequency resources occupied by the second sequence and the second wireless signal; the second sequence and the second wireless signal both belong to MsgA in 2-step random access, and the second wireless signal includes PUSCH and DMRS; the time domain resources occupied by the first information belong to the first time window, and the time interval from the end time of the first time window to the start time of sending the second sequence is not less than the target time length.

54. The method in the second communication node according to claim 53, characterized in that: A transport block is sequentially subjected to CRC addition, segmentation, coding block-level CRC addition, channel coding, rate matching, concatenation, scrambling, modulation, layer mapping, precoding, mapping to a virtual resource block, mapping from a virtual resource block to a physical resource block, OFDM baseband signal generation, and modulation and up-conversion to obtain the second wireless signal; or a transport block is sequentially subjected to CRC addition, segmentation, coding block-level CRC addition, channel coding, rate matching, concatenation, scrambling, modulation, layer mapping, transform precoding, precoding, mapping to a virtual resource block, mapping from a virtual resource block to a physical resource block, OFDM baseband signal generation, and modulation and up-conversion to obtain the second wireless signal.

55. The method in the second communication node according to claim 53 or 54, characterized in that: The first information is MsgB for the first sequence, and the monitoring time window for MsgB of the first sequence is the first time window.

56. The method in the second communication node according to any one of claims 46 to 55, characterized in that: include: sending a second message; The first information and the second information are used to determine the X candidate time lengths respectively, where X is equal to 2; The second information includes all or part of the fields in an information unit in an RRC signaling.

57. The method in the second communication node according to any one of claims 46 to 56, characterized in that: The first information is transmitted via a PDSCH, and MsgB-RNTI is used to generate an initial value of a generator of a scrambling code sequence of the PDSCH carrying the first information.

58. The method in the second communication node according to any one of claims 46 to 57, characterized in that: The sender of the first sequence is in an RRC connected state (RRC_CONNECTED), or the sender of the first sequence is in an RRC inactive state (RRC_INACTIVE).

59. The method in the second communication node according to any one of claims 46 to 58, characterized in that: The first sequence is a Zadoff-Chu (ZC) sequence with a length of 839 or 139, and the first sequence is transmitted via PRACH; the second sequence is a Zadoff-Chu (ZC) sequence with a length of 839 or 139, and the second sequence is transmitted via PRACH.

60. The method in the second communication node according to any one of claims 46 to 59, characterized in that: The first information includes all or part of a subheader in MsgB (message B) in two-step random access, or the first information includes all or part of a field in an information unit in an RRC signaling.

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