Method and apparatus in node used for wireless communication

Abstract

The invention discloses a method and an apparatus in a node used for wireless communication. A first receiver receiving at least one of the plurality of reference signals; selecting a first reference signal, wherein the first reference signal is one of the plurality of reference signals; the first transmitter determines a target PRACH opportunity group; a first random access lead code is sent in the target PRACH opportunity group; wherein the step of determining the target PRACH opportunity group comprises the following steps: determining a first element from a first set; the first set comprises a plurality of elements, and each element in the first set comprises at least one PRACH opportunity mapped to the first reference signal; the step of determining the target PRACH opportunity group comprises: randomly selecting a PRACH opportunity group from a first PRACH opportunity group set at an equal probability; each PRACH opportunity group in the first set of PRACH opportunity groups is mapped to the first reference signal, and each PRACH opportunity group in the first set of PRACH opportunity groups includes K PRACH opportunities.

Description

Technical Field

[0001] The present application relates to a transmission method and device in a wireless communication system, and in particular to a transmission method and device for wireless signals in a wireless communication system supporting a cellular network. Background Art

[0002] When a user equipment wants to communicate with the network but there are no uplink shared channels or control channel resources available for transmission, or the uplink transmission is in an unsynchronized state, PRACH (Physical random access channel) is used for random access; using multiple PRACH occasions to send random access preambles is an effective means to improve uplink coverage. Summary of the invention

[0003] For a UE configured with a PRACH opportunity group (each PRACH opportunity group includes multiple PRACH opportunities), how to determine the PRACH opportunity group used for PRACH transmission is a key problem that must be solved; the present application discloses a solution to the above problem. The present application can be applied to a variety of wireless communication scenarios, such as cellular networks, Internet of Vehicles, Internet of Things, satellite communication networks, etc., and achieve similar technical effects. In addition, the use of a unified solution for different scenarios (including but not limited to cellular networks, Internet of Vehicles, Internet of Things, satellite communication networks) can also help reduce hardware complexity and cost, or improve performance. In the absence of conflict, the embodiments and features in any node of the present application can be applied to any other node. In the absence of conflict, the embodiments and features in the embodiments of the present application can be arbitrarily combined with each other.

[0004] As an example, the interpretation of the terms in the present application refers to the definitions of the TS38 series of specification protocols of 3GPP.

[0005] As an example, the interpretation of the terms in the present application refers to the definitions of the TS37 series of specification protocols of 3GPP.

[0006] The present application discloses a method in a first node used for wireless communication, characterized by comprising:

[0007] receiving at least one of a plurality of reference signals; selecting a first reference signal, the first reference signal being one of the plurality of reference signals;

[0008] Determining a target PRACH opportunity group; sending a first random access preamble in the target PRACH opportunity group;

[0009] Among them, determining the target PRACH opportunity group includes: determining a first element from a first set; the first set includes multiple elements, and each element in the first set includes at least one PRACH opportunity mapped to the first reference signal; determining the target PRACH opportunity group includes: randomly selecting a PRACH opportunity group with medium probability from the first PRACH opportunity group set; each PRACH opportunity group in the first PRACH opportunity group set is mapped to the first reference signal, and each PRACH opportunity group in the first PRACH opportunity group set includes K PRACH opportunities, and K is a positive integer greater than 1; the first type of period includes multiple associated mode periods, and the first PRACH opportunity group set depends on the first type of period.

[0010] As an embodiment, the problem to be solved by the present application includes: how to optimize the determination of the target PRACH opportunity group.

[0011] As an embodiment, the problem to be solved by the present application includes: how to reduce the transmission delay or improve the transmission performance for PRACH transmission using the PRACH opportunity group.

[0012] As an embodiment, the benefits of the above method include: improving uplink coverage.

[0013] As an embodiment, the benefits of the above method include: reducing the delay of PRACH transmission using the PRACH opportunity group, or improving the success rate of PRACH transmission using the PRACH opportunity group.

[0014] As an embodiment, the benefits of the above method include: enhancing the selection of the PRACH opportunity group for sending the random access preamble by the first node, and improving the transmission performance of the PRACH.

[0015] As an embodiment, the benefits of the above method include: improving the utilization efficiency of PRACH resources.

[0016] According to one aspect of the present application, the above method is characterized in that:

[0017] The first PRACH opportunity group set is dependent on the first element.

[0018] According to one aspect of the present application, the above method is characterized in that:

[0019] Each element in the first set is a PRACH opportunity group, each PRACH opportunity group in the first set is mapped to the first reference signal, and each PRACH opportunity group in the first set includes K PRACH opportunities.

[0020] According to one aspect of the present application, the above method is characterized in that:

[0021] Each element in the first set is a PRACH opportunity, and each PRACH opportunity in the first set is mapped to the first reference signal; the PRACH opportunity groups in the first PRACH opportunity group set are all in the same first type period, and the starting PRACH opportunity of each PRACH opportunity group in the first PRACH opportunity group set is not earlier than the first element.

[0022] As an embodiment, the advantages of the above method include: small workload required for standardization and good compatibility.

[0023] As an embodiment, the benefits of the above method include: ensuring that the first node can obtain the uplink coverage gain brought by PRACH transmission using K PRACH opportunities.

[0024] According to one aspect of the present application, the above method is characterized in that:

[0025] The multiple reference signals are respectively multiple SSBs.

[0026] According to one aspect of the present application, the above method is characterized in that:

[0027] The target PRACH opportunity group is the one PRACH opportunity group selected from the first PRACH opportunity group set.

[0028] According to one aspect of the present application, the above method is characterized in that it includes:

[0029] receiving a first information block;

[0030] The first information block includes indication information of the PRACH mask index; the determination of the target PRACH opportunity group depends on the first information block, and each PRACH opportunity in the target PRACH opportunity group is a PRACH opportunity indicated by the first information block.

[0031] As an embodiment, the benefits of the above method include: using the existing 3GPP PRACH mask index indication signaling to implement the indication of the PRACH opportunity group, thereby simplifying the system design.

[0032] As an embodiment, the benefits of the above method include: being beneficial to improving the performance of non-contention random access.

[0033] The present application discloses a method used in a second node of wireless communication, characterized by comprising:

[0034] sending a plurality of reference signals;

[0035] Receiving a first random access preamble in a target PRACH opportunity group;

[0036] Among them, the transmitter of the first random access preamble code selects a first reference signal and determines the target PRACH opportunity group; the first reference signal is one of the multiple reference signals; the determination of the target PRACH opportunity group includes: determining a first element from a first set; the first set includes multiple elements, and each element in the first set includes at least one PRACH opportunity mapped to the first reference signal; the determination of the target PRACH opportunity group includes: randomly selecting a PRACH opportunity group with medium probability from the first PRACH opportunity group set; each PRACH opportunity group in the first PRACH opportunity group set is mapped to the first reference signal, and each PRACH opportunity group in the first PRACH opportunity group set includes K PRACH opportunities, and K is a positive integer greater than 1; the first type of period includes multiple associated mode periods, and the first PRACH opportunity group set depends on the first type of period.

[0037] According to one aspect of the present application, the above method is characterized in that:

[0038] The first PRACH opportunity group set is dependent on the first element.

[0039] According to one aspect of the present application, the above method is characterized in that:

[0040] Each element in the first set is a PRACH opportunity group, each PRACH opportunity group in the first set is mapped to the first reference signal, and each PRACH opportunity group in the first set includes K PRACH opportunities.

[0041] According to one aspect of the present application, the above method is characterized in that:

[0042] Each element in the first set is a PRACH opportunity, and each PRACH opportunity in the first set is mapped to the first reference signal; the PRACH opportunity groups in the first PRACH opportunity group set are all in the same first type period, and the starting PRACH opportunity of each PRACH opportunity group in the first PRACH opportunity group set is not earlier than the first element.

[0043] According to one aspect of the present application, the above method is characterized in that:

[0044] The multiple reference signals are respectively multiple SSBs.

[0045] According to one aspect of the present application, the above method is characterized in that:

[0046] The target PRACH opportunity group is the one PRACH opportunity group selected from the first PRACH opportunity group set.

[0047] According to one aspect of the present application, the above method is characterized in that it includes:

[0048] Sending a first information block;

[0049] The first information block includes indication information of the PRACH mask index; the determination of the target PRACH opportunity group depends on the first information block, and each PRACH opportunity in the target PRACH opportunity group is a PRACH opportunity indicated by the first information block.

[0050] The present application discloses a first node used for wireless communication, characterized in that it includes:

[0051] A first receiver receives at least one of a plurality of reference signals; selects a first reference signal, wherein the first reference signal is one of the plurality of reference signals;

[0052] A first transmitter determines a target PRACH opportunity group; and sends a first random access preamble in the target PRACH opportunity group;

[0053] Among them, determining the target PRACH opportunity group includes: determining a first element from a first set; the first set includes multiple elements, and each element in the first set includes at least one PRACH opportunity mapped to the first reference signal; determining the target PRACH opportunity group includes: randomly selecting a PRACH opportunity group with medium probability from the first PRACH opportunity group set; each PRACH opportunity group in the first PRACH opportunity group set is mapped to the first reference signal, and each PRACH opportunity group in the first PRACH opportunity group set includes K PRACH opportunities, and K is a positive integer greater than 1; the first type of period includes multiple associated mode periods, and the first PRACH opportunity group set depends on the first type of period.

[0054] The present application discloses a second node used for wireless communication, characterized in that it includes:

[0055] A second transmitter sends a plurality of reference signals;

[0056] A second receiver receives a first random access preamble in a target PRACH opportunity group;

[0057] Among them, the transmitter of the first random access preamble code selects a first reference signal and determines the target PRACH opportunity group; the first reference signal is one of the multiple reference signals; the determination of the target PRACH opportunity group includes: determining a first element from a first set; the first set includes multiple elements, and each element in the first set includes at least one PRACH opportunity mapped to the first reference signal; the determination of the target PRACH opportunity group includes: randomly selecting a PRACH opportunity group with medium probability from the first PRACH opportunity group set; each PRACH opportunity group in the first PRACH opportunity group set is mapped to the first reference signal, and each PRACH opportunity group in the first PRACH opportunity group set includes K PRACH opportunities, and K is a positive integer greater than 1; the first type of period includes multiple associated mode periods, and the first PRACH opportunity group set depends on the first type of period. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0059] Figure 1 A processing flow chart of a first node according to an embodiment of the present application is shown;

[0060] Figure 2 A schematic diagram of a network architecture according to an embodiment of the present application is shown;

[0061] 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;

[0062] Figure 4 A schematic diagram showing a first communication device and a second communication device according to an embodiment of the present application is shown;

[0063] Figure 5 A signal transmission flow chart according to an embodiment of the present application is shown;

[0064] Figure 6 A schematic diagram illustrating elements in a first set according to an embodiment of the present application is shown;

[0065] Figure 7 A schematic diagram showing the relationship between a first set, a first reference signal, a first PRACH opportunity group set, a first type of period, and a first element according to an embodiment of the present application;

[0066] Figure 8A schematic diagram for illustrating a first PRACH opportunity group set according to an embodiment of the present application is shown;

[0067] Fig. 9 A schematic diagram for illustrating a first PRACH opportunity group set according to an embodiment of the present application is shown;

[0068] Fig.10 A schematic diagram illustrating a first information block according to an embodiment of the present application is shown;

[0069] Fig.11 A structural block diagram of a processing device in a first node device according to an embodiment of the present application is shown;

[0070] Fig.12 A structural block diagram of a processing device in a second node device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0071] 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 combined with each other at will.

[0072] Example 1

[0073] Embodiment 1 illustrates a processing flow chart of a first node according to an embodiment of the present application, as shown in the attached Figure 1 shown.

[0074] In embodiment 1, the first node in the present application receives at least one of multiple reference signals in step 101; selects a first reference signal in step 102; determines a target PRACH opportunity group in step 103; and sends a first random access preamble code in the target PRACH opportunity group in step 104.

[0075] In embodiment 1, the first reference signal is one of the multiple reference signals; the determining the target PRACH opportunity group includes: determining a first element from a first set; the first set includes multiple elements, each element in the first set includes at least one PRACH opportunity mapped to the first reference signal; the determining the target PRACH opportunity group includes: randomly selecting a PRACH opportunity group with medium probability from the first PRACH opportunity group set; each PRACH opportunity group in the first PRACH opportunity group set is mapped to the first reference signal, each PRACH opportunity group in the first PRACH opportunity group set includes K PRACH opportunities, and K is a positive integer greater than 1; the first type of period includes multiple associated mode periods, and the first PRACH opportunity group set depends on the first type of period.

[0076] As an embodiment, the multiple reference signals are respectively multiple reference signals used for contention-based random access.

[0077] As an embodiment, the multiple reference signals are respectively multiple reference signals used for non-contention-free random access (contention-free Random Access).

[0078] As an embodiment, the multiple reference signals are respectively multiple reference signals used for beam failure recovery.

[0079] As an embodiment, the multiple reference signals are in a candidateBeamRSList.

[0080] As an embodiment, the multiple reference signals are multiple SSBs (Synchronization Signal Blocks).

[0081] As an embodiment, the multiple reference signals are multiple CSI-RS (Channel State Information Reference Signal, channel state information reference signal).

[0082] As an embodiment, the first node receives only a portion of the plurality of reference signals.

[0083] As an embodiment, the first node determines by itself which reference signals among the multiple reference signals to receive.

[0084] As an embodiment, the first node receives each reference signal of the multiple reference signals.

[0085] As an embodiment, the first node receives at least 2 reference signals among the multiple reference signals, and determines the first reference signal by itself from the at least 2 reference signals.

[0086] As an embodiment, the first node receives each reference signal among the multiple reference signals, and randomly selects the first reference signal with equal probability from the multiple reference signals.

[0087] As an embodiment, the selection of the first reference signal depends on an estimation of channel quality.

[0088] As an embodiment, the selection of the first reference signal depends on RSRP (Reference Signal Received Power).

[0089] As an embodiment, the multiple reference signals are multiple SSBs respectively; if there is at least one valid SSB whose corresponding SS-RSRP (Synchronization Signal-RSRP) is higher than a first threshold; the first reference signal is an SSB whose corresponding SS-RSRP is higher than the first threshold; otherwise, the first reference signal is an SSB determined by the first node itself; the first threshold is configurable.

[0090] As an embodiment, the RSRP of at least one reference signal among the multiple reference signals is higher than a first threshold; the first reference signal is a reference signal among the multiple reference signals whose corresponding RSRP is higher than the first threshold; the first threshold is configurable.

[0091] As a sub-embodiment of the above embodiment, the first reference signal is which reference signal among the multiple reference signals whose corresponding RSRP is higher than the first threshold is determined by the first node itself.

[0092] As a sub-embodiment of the above embodiment, the first node randomly selects the first reference signal from reference signals whose corresponding RSRPs are higher than the first threshold among the multiple reference signals.

[0093] As a sub-embodiment of the above embodiment, the first reference signal is a reference signal with the highest RSRP among the multiple reference signals.

[0094] As a sub-embodiment of the above embodiment, among the multiple reference signals, there is no reference signal whose corresponding RSRP is not higher than the RSRP of the first reference signal and whose corresponding RSRP is higher than the first threshold.

[0095] As an embodiment, the RSRPs of the multiple reference signals are all higher than a first threshold; and the first threshold is configurable.

[0096] As an embodiment, the first node receives the multiple reference signals; the multiple reference signals are respectively multiple SSBs, the SS-RSRP of the multiple reference signals are all higher than a first threshold and at least one of the multiple reference signals is available; the first threshold is configurable.

[0097] As an embodiment, the first reference signal is which reference signal among the multiple reference signals is determined by the first node itself.

[0098] As an embodiment, the first node randomly selects the first reference signal with equal probability from the multiple reference signals.

[0099] As an embodiment, the first reference signal is a reference signal with the highest SS-RSRP among the multiple reference signals.

[0100] As an embodiment, the first reference signal is a reference signal with the lowest SS-RSRP among the multiple reference signals.

[0101] As an embodiment, the first threshold is configured by RRC signaling.

[0102] As an embodiment, the first threshold is indicated by rsrp-ThresholdSSB.

[0103] As an embodiment, the first threshold is indicated by rsrp-ThresholdSSB-SUL.

[0104] As an embodiment, the first threshold is indicated by rsrp-ThresholdCSI-RS.

[0105] As an embodiment, the first threshold is configured by MAC CE (Medium Access Control layer Control Element, media access control layer control element).

[0106] As an embodiment, the first node receives at least one reference signal among the multiple reference signals and determines the first reference signal by itself.

[0107] As an embodiment, determining the target PRACH opportunity group includes: determining the K.

[0108] As an embodiment, K is one of 2, 4, and 8.

[0109] As an embodiment, K is no greater than 1024.

[0110] As an embodiment, the K is configurable.

[0111] As an embodiment, the K is indicated by RRC signaling.

[0112] As an embodiment, the K is indicated by the MAC CE.

[0113] As an embodiment, the first node determines K by itself.

[0114] As an embodiment, the first value range is predefined, and the first node determines the K from the first value range by itself.

[0115] As an embodiment, the first value range is configured by RRC signaling, and the first node determines the K from the first value range by itself.

[0116] As an embodiment, the determination of K depends on RSRP.

[0117] As an embodiment, multiple intervals are mapped one by one to multiple values ​​in a first value range, and the multiple intervals do not overlap with each other; when the RSRP of the first reference signal falls within an interval, K is the value mapped to the one interval in the first value range.

[0118] As an embodiment, the benefits of the above method include: utilizing RSRP to improve utilization of PRACH resources.

[0119] As an embodiment, the multiple intervals cover the value range of RSRP of the first reference signal.

[0120] As an embodiment, the multiple intervals are predefined.

[0121] As an embodiment, the multiple intervals are configured by RRC signaling.

[0122] As an embodiment, the first value range includes multiple positive integers.

[0123] As an embodiment, the first value range includes 2, 4, and 8.

[0124] As an embodiment, the first value range is predefined.

[0125] As an embodiment, the first value range is configured by RRC signaling.

[0126] As an embodiment, the first random access preamble is a random access preamble configured for sending a PRACH in a PRACH opportunity group including K PRACH opportunities.

[0127] As an embodiment, sending PRACH in a PRACH opportunity group means sending PRACH in each PRACH opportunity included in the PRACH opportunity group.

[0128] As an embodiment, the first node sends the first random access preamble code once in each PRACH opportunity in the target PRACH opportunity group.

[0129] As an embodiment, the first node sends a repetition of the first random access preamble code in each PRACH opportunity in the target PRACH opportunity group.

[0130] As an embodiment, the first node sends at least a portion of the first random access preamble code in each PRACH opportunity in the target PRACH opportunity group.

[0131] As an embodiment, according to a mapping relationship between a random access preamble (Random Access Preamble) and a reference signal, the first random access preamble is mapped to the first reference signal; the mapping relationship between the random access preamble and the reference signal is configurable.

[0132] As an embodiment, the first random access preamble code is configurable.

[0133] As an embodiment, the first random access preamble code is configured to perform non-contention random access when the first reference signal is selected.

[0134] As an embodiment, the first node determines the first random access preamble code by itself.

[0135] As an embodiment, the first node randomly selects the first random access preamble with medium probability from a plurality of random access preambles configured for PRACH transmission in a PRACH opportunity group including K PRACH opportunities and mapped to the first reference signal.

[0136] As an embodiment, the first node independently determines the first random access preamble from a plurality of random access preambles configured for PRACH transmission in a PRACH opportunity group including K PRACH opportunities and mapped to the first reference signal.

[0137] As an embodiment, the target PRACH opportunity group is reserved for the transmission of at least one random access preamble, and the at least one random access preamble includes the first random access preamble.

[0138] As an embodiment, each PRACH opportunity group in the first PRACH opportunity group set is reserved for the transmission of at least one random access preamble code, and the at least one random access preamble code includes the first random access preamble code.

[0139] As an embodiment, when a PRACH opportunity group is configured for the transmission of a random access preamble code, the one PRACH opportunity group is reserved for the transmission of the one random access preamble code.

[0140] As an embodiment, when a PRACH opportunity group is a candidate PRACH opportunity group when a random access preamble is selected for PRACH transmission, the PRACH opportunity group is reserved for the transmission of the random access preamble.

[0141] As an embodiment, when a PRACH opportunity is configured for the transmission of a random access preamble, the PRACH opportunity is reserved for the transmission of the random access preamble.

[0142] As an embodiment, when a PRACH opportunity is a candidate PRACH opportunity when a random access preamble is selected for PRACH transmission, the PRACH opportunity is reserved for the transmission of the random access preamble.

[0143] As an embodiment, when each PRACH opportunity in a PRACH opportunity group is reserved for the transmission of a random access preamble, the PRACH opportunity group is reserved for the transmission of the random access preamble.

[0144] As an embodiment, each element in the first set is reserved for the transmission of at least one random access preamble code, and the at least one random access preamble code includes the first random access preamble code.

[0145] As an embodiment, for each reference signal among the multiple reference signals, the first node is configured with at least one random access preamble code.

[0146] As an embodiment, for the index of each reference signal in the multiple reference signals, the first node is configured with at least one random access preamble code.

[0147] As an embodiment, when the first node is configured with a random access preamble code for the index of one reference signal among the multiple reference signals, the random access preamble code is a random access preamble code for the one reference signal among the multiple reference signals.

[0148] As an embodiment, the first random access preamble code is randomly selected with equal probability from more than one random access preamble codes configured for the first reference signal.

[0149] As an embodiment, random access preamble group B (Random Access Preambles group B) is not configured.

[0150] As an embodiment, the first random access preamble is a random access preamble in a random access preamble group A (Random Access Preambles group A).

[0151] As an embodiment, the first random access preamble is randomly selected with equal probability from more than one random access preamble associated with the first reference signal and random access preamble group A.

[0152] As an embodiment, the first random access preamble is randomly selected with equal probability from more than one random access preambles for the first reference signal and belonging to random access preamble group A.

[0153] As an embodiment, the first random access preamble is a random access preamble in random access preamble group B.

[0154] As an embodiment, the first random access preamble is randomly selected with equal probability from more than one random access preamble associated with the first reference signal and random access preamble group B.

[0155] As an embodiment, the first random access preamble is randomly selected with equal probability from more than one random access preamble for the first reference signal and belonging to random access preamble group B.

[0156] As an embodiment, the first element is determined by the first node itself from the first set.

[0157] As an embodiment, the first element is randomly selected by the first node from the first set.

[0158] As an embodiment, each element in the first set is a PRACH opportunity group including K PRACH opportunities.

[0159] As an embodiment, each element in the first set is a PRACH opportunity group including only K PRACH opportunities.

[0160] As an embodiment, each element in the first set is a PRACH opportunity.

[0161] As an embodiment, the first set is configurable.

[0162] As an embodiment, there are 2 elements in the first set that are respectively in different first-type periods.

[0163] As an embodiment, each of the multiple reference signals is configured to at least one PRACH opportunity by RRC signaling; the reference signal to which a PRACH opportunity is mapped refers to: the reference signal configured to this PRACH opportunity.

[0164] As an embodiment, the first reference signal is an SSB; when the index of the first reference signal is mapped to at least one PRACH opportunity, the at least one PRACH opportunity is mapped to the first reference signal.

[0165] As an embodiment, the multiple reference signals are multiple SSBs with different indexes; according to a predefined mapping order and the number of SSBs to which each PRACH opportunity is mapped configured by RRC signaling, the index of each reference signal in the multiple reference signals is mapped to at least one PRACH opportunity.

[0166] As an embodiment, the multiple reference signals are multiple SSBs with different indexes; the indexes of the SSBs are mapped to PRACH occasions in the following order:

[0167] First, map in ascending order of preamble code index within a single PRACH opportunity; second, map in ascending order of frequency resource index of frequency-multiplexed PRACH opportunity; third, map in ascending order of time resource index of time-division-multiplexed PRACH opportunity within PRACH time slot; finally, map in ascending order of PRACH time slot index.

[0168] As an embodiment, the PRACH transmitted in a PRACH opportunity and the reference signal mapped to the PRACH opportunity are quasi co-located in the spatial domain.

[0169] As an embodiment, the target PRACH opportunity group includes K PRACH opportunities.

[0170] As an embodiment, in the process of determining the target PRACH opportunity group: the first node first determines the first element from the first set, and then randomly selects a PRACH opportunity group from the first PRACH opportunity group set with medium probability.

[0171] As a sub-embodiment of the above embodiment, the target PRACH opportunity group is the one PRACH opportunity group selected from the first PRACH opportunity group set.

[0172] As an embodiment, the benefits of the above method include: reducing the algorithm complexity of determining the target PRACH opportunity group.

[0173] As an embodiment, in the process of determining the target PRACH opportunity group: the first node first randomly selects a PRACH opportunity group with medium probability from the first PRACH opportunity group set, and then determines the first element from the first set.

[0174] As a sub-embodiment of the above embodiment, the target PRACH opportunity group is the first element.

[0175] As a sub-embodiment of the above embodiment, each element in the first set is a PRACH opportunity group, and the first set includes the one PRACH opportunity group selected from the first PRACH opportunity group set.

[0176] As an embodiment, the first type of period is configurable.

[0177] As an embodiment, one first-type period includes 2 association mode periods.

[0178] As an embodiment, one of the first-type cycles includes 4 association mode cycles.

[0179] As an embodiment, one first-type cycle includes 8 association mode cycles.

[0180] As an embodiment, the number of association mode periods included in one first-type period is configurable.

[0181] As an embodiment, any two of the first-type periods include the same number of association mode periods.

[0182] As an embodiment, the durations occupied by any two of the first-type cycles are the same.

[0183] As an embodiment, an association mode period depends on a mapping relationship between multiple SS / PBCH (synchronization signals / physical broadcast channel) block indices and multiple PRACH opportunities.

[0184] As an embodiment, an association pattern period (associationpatternperiod) includes one or more association periods (associationperiod(s)) mapping between SS / PBCH block indices and PRACH opportunities.

[0185] As an embodiment, the mapping pattern between SS / PBCH block indexes and PRACH opportunities is repeated between different association pattern periods.

[0186] As an embodiment, the statement "the first PRACH opportunity group set depends on the first type of period" means that the PRACH opportunity groups in the first PRACH opportunity group set are all in the same first type of period.

[0187] As an embodiment, determination of the first PRACH opportunity group set depends on the first type of period, and the PRACH opportunity groups in the first PRACH opportunity group set are all in the same first type of period.

[0188] As an embodiment, there are 2 PRACH opportunities in the first PRACH opportunity set, which are respectively in 2 associated mode periods in the same first type period.

[0189] As an embodiment, the number of PRACH opportunities included in the first PRACH opportunity set is limited to be no greater than the number of PRACH opportunities mapped to the first reference signal in one first type period.

[0190] As an embodiment, the first PRACH opportunity group set depends on the first element.

[0191] As an embodiment, the first PRACH opportunity group set is related to the first type of period in which the first element is located.

[0192] As an embodiment, the first type period in which the first element is located is a first type period including all time domain resources occupied by the first element.

[0193] As an embodiment, the first type of period in which a PRACH opportunity is located is a first type of period including all time domain resources occupied by the one PRACH opportunity.

[0194] As an embodiment, the first type of period in which a PRACH opportunity group is located is a first type of period including all time domain resources occupied by each PRACH opportunity in the one PRACH opportunity group.

[0195] As an embodiment, the target period is the first type period where the first element is located, and the first type period where any PRACH opportunity group in the first PRACH opportunity group set is located is not earlier than the target period.

[0196] As an embodiment, the target period is the first type of period in which the first element is located, and the first PRACH opportunity group set includes the PRACH opportunity group in the target period.

[0197] As an embodiment, the target period is the first type of period in which the first element is located, and the first PRACH opportunity group set includes all available PRACH opportunity groups in the target period.

[0198] As an embodiment, the target period is the first type of period where the first element is located, and the first PRACH opportunity group set only includes a portion of available PRACH opportunity groups in the target period.

[0199] As an embodiment, the target period is the first type of period in which the first element is located, and each PRACH opportunity group in the first PRACH opportunity group set is an available PRACH opportunity group in the target period.

[0200] As an embodiment, the target period is the first type of period in which the first element is located, and each PRACH opportunity group in the first PRACH opportunity group set is a PRACH opportunity group in the target period.

[0201] As an embodiment, the benefits of the above method include: reducing the transmission delay of PRACH.

[0202] As an embodiment, the target period is the first first-type period after the first-type period in which the first element is located, and each PRACH opportunity group in the first PRACH opportunity group set is a PRACH opportunity group in the target period.

[0203] As an embodiment, all elements in the first set are in the same first-type period.

[0204] As an embodiment, for a PRACH opportunity group mapped to the first reference signal, each PRACH opportunity included therein is mapped to the first reference signal.

[0205] As an embodiment, when each PRACH opportunity included in a PRACH opportunity group is mapped to the first reference signal, the PRACH opportunity group is mapped to the first reference signal.

[0206] As an embodiment, there is at least one PRACH opportunity group (PRACH occasion group) including only K PRACH opportunities and at least one PRACH opportunity group including more than K PRACH opportunities in the first PRACH opportunity group set.

[0207] As an embodiment, the benefits of the above method include: improving the utilization efficiency of a PRACH opportunity group including more than K PRACH opportunities.

[0208] As an embodiment, the benefits of the above method include: taking into account both the uplink coverage effect and the utilization efficiency of PRACH resources.

[0209] As an embodiment, each PRACH opportunity group in the first PRACH opportunity group set is composed of K PRACH opportunities.

[0210] As an embodiment, the time-frequency resources occupied by a PRACH opportunity are configurable.

[0211] As an embodiment, the PRACH opportunity groups in the first PRACH opportunity group set are all in the same first type period.

[0212] As an embodiment, the first PRACH opportunity group set includes at least one PRACH opportunity group.

[0213] As an embodiment, the first PRACH opportunity group set includes multiple PRACH opportunity groups.

[0214] As an embodiment, when the first PRACH opportunity group set includes only one PRACH opportunity group, the statement "randomly select a PRACH opportunity group with medium probability from the first PRACH opportunity group set" means: the only PRACH opportunity group in the first PRACH opportunity group set is selected.

[0215] As an embodiment, which PRACH opportunities are included in a PRACH opportunity group is configurable.

[0216] As an embodiment, the time-frequency position of the starting PRACH opportunity of a PRACH opportunity group is configurable.

[0217] As an embodiment, all PRACH opportunities included in a PRACH opportunity group have the same index.

[0218] As an embodiment, all PRACH opportunities in a PRACH opportunity group are mapped to the same SSB.

[0219] As an embodiment, between the earliest PRACH opportunity and the latest PRACH opportunity in a PRACH opportunity group: there is no PRACH opportunity that does not overlap with the earliest PRACH opportunity and the latest PRACH opportunity in the PRACH opportunity group in the time domain, and is mapped to the SSB to which the PRACH opportunities in the PRACH opportunity group are mapped.

[0220] As an embodiment, a PRACH opportunity group may span multiple association mode periods.

[0221] Example 2

[0222] Embodiment 2 illustrates a schematic diagram of a network architecture according to the present application, as shown in the attached Figure 2 shown.

[0223] Attached Figure 2A diagram of a network architecture 200 for 5G NR, LTE (Long-Term Evolution) and LTE-A (Long-Term Evolution Advanced) systems is illustrated. The 5G NR or LTE network architecture 200 may be referred to as EPS (Evolved Packet System) 200 or some other suitable term. 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, 5G Core Network) 210, HSS (Home Subscriber Server) 220 and Internet Service 230. EPS may be interconnected with other access networks, but these entities / interfaces are not shown for simplicity. As shown, EPS provides packet switching services, but those skilled in the art will readily appreciate that the various concepts presented throughout this application may be extended to networks that provide circuit switching 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 towards 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. gNB 203 provides an access point to EPC / 5G-CN 210 for UE 201. Examples of UE 201 include cellular phones, smart phones, session initiation protocol (SIP) phones, laptop computers, personal digital assistants (PDAs), satellite radios, non-terrestrial base station communications, satellite mobile communications, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, drones, aircraft, narrowband Internet of Things devices, machine type communication devices, land vehicles, cars, wearable devices, or any other similar functional devices. Those skilled in the art may also refer to UE 201 as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable term. gNB 203 is connected to EPC / 5G-CN 210 via an S1 / NG interface.EPC / 5G-CN 210 includes MME (Mobility Management Entity) / AMF (Authentication Management Field) / UPF (User Plane Function) 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 handles signaling between UE201 and EPC / 5G-CN 210. 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. The Internet service 230 includes the operator's corresponding Internet protocol services, which may specifically include the Internet, intranet, IMS (IP Multimedia Subsystem) and packet switching streaming services.

[0224] As an embodiment, the UE201 corresponds to the first node in the present application.

[0225] As an embodiment, the gNB203 corresponds to the second node in this application.

[0226] As an embodiment, the UE201 corresponds to the first node in the present application, and the gNB203 corresponds to the second node in the present application.

[0227] As an embodiment, the gNB203 is a macrocellular base station.

[0228] As an embodiment, the gNB203 is a micro cell base station.

[0229] As an embodiment, the gNB203 is a picoCell base station.

[0230] As an embodiment, the gNB203 is a home base station (Femtocell).

[0231] As an embodiment, the gNB203 is a base station device that supports large delay difference.

[0232] As an embodiment, the gNB203 is a flying platform device.

[0233] As an embodiment, the gNB203 is a satellite device.

[0234] Example 3

[0235] Embodiment 3 shows a schematic diagram of an embodiment of a wireless protocol architecture of a user plane and a control plane according to the present application, as shown in the attached Figure 3 shown. Figure 3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane 350 and a control plane 300, Figure 3The radio protocol architecture of the control plane 300 for a first communication node device (UE, gNB or RSU in V2X) and a second communication node device (gNB, UE or RSU in V2X), or between two UEs is shown with 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 and the two UEs through PHY301. 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. The PDCP sublayer 304 provides multiplexing between different radio bearers and logical channels. The PDCP sublayer 304 also provides security by encrypting data packets, and provides support for inter-zone mobility of the first communication node device between the second communication node device. 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. The RRC (Radio Resource Control) sublayer 306 in layer 3 (L3 layer) in the control plane 300 is responsible for obtaining radio resources (i.e., radio bearers) and configuring the lower layer using RRC signaling between the second communication node device and the first communication node device. The radio protocol architecture of the user plane 350 includes layer 1 (L1 layer) and layer 2 (L2 layer). The radio protocol architecture used for the first communication node device and the second communication node device in the user plane 350 is substantially the same as the corresponding layers and sublayers in the control plane 300 for the physical layer 351, the PDCP sublayer 354 in the L2 layer 355, the RLC sublayer 353 in the L2 layer 355, and the MAC sublayer 352 in the L2 layer 355, but the PDCP sublayer 354 also provides header compression for upper layer data packets to reduce radio transmission overhead.The L2 layer 355 in the user plane 350 also includes a SDAP (Service Data Adaptation Protocol) sublayer 356, which is responsible for mapping between QoS flows and data radio bearers (DRBs) to support the diversity of services. Although not shown in the figure, the first communication node device may have several upper layers above the L2 layer 355, 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.).

[0236] As an example, Figure 3 The wireless protocol architecture in is applicable to the first node in this application.

[0237] As an example, Figure 3 The wireless protocol architecture in is applicable to the second node in this application.

[0238] As an embodiment, the first information block in the present application is generated in the RRC sublayer 306.

[0239] As an embodiment, the first random access preamble code in the present application is generated by the PHY301.

[0240] As an embodiment, the multiple reference signals in the present application are generated by the PHY301.

[0241] Example 4

[0242] Embodiment 4 shows a schematic diagram of a first communication device and a second communication device according to the present application, as shown in the attached figure. Figure 4 shown. Figure 4 is a block diagram of a first communication device 410 and a second communication device 450 communicating with each other in an access network.

[0243] The first communication device 410 includes a controller / processor 475 , a memory 476 , a receive processor 470 , a transmit processor 416 , a multi-antenna receive processor 472 , a multi-antenna transmit processor 471 , a transmitter / receiver 418 and an antenna 420 .

[0244] The second communication device 450 includes a controller / processor 459, a memory 460, a data source 467, a transmit processor 468, a receive processor 456, a multi-antenna transmit processor 457, a multi-antenna receive processor 458, a transmitter / receiver 454 and an antenna 452.

[0245] In transmission from the first communication device 410 to the second communication device 450, at the first communication device 410, upper layer data packets from the core network are provided to the controller / processor 475. The controller / processor 475 implements the functionality of the L2 layer. In transmission from the first communication device 410 to the first communication device 450, the controller / processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation to the second communication device 450 based on various priority metrics. The controller / processor 475 is also responsible for retransmission of lost packets and signaling to the second communication device 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for the L1 layer (i.e., the physical layer). The transmit processor 416 implements coding and interleaving to facilitate forward error correction (FEC) at the second communication device 450, as well as mapping of signal constellations based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The multi-antenna transmit processor 471 performs digital spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming processing on the coded and modulated symbols to generate one or more spatial streams. The transmit processor 416 then maps each spatial stream to a subcarrier, multiplexes with a reference signal (e.g., a pilot) in the time domain and / or frequency domain, and then uses an inverse fast Fourier transform (IFFT) to generate a physical channel carrying a time-domain multi-carrier symbol stream. The multi-antenna transmit processor 471 then performs a transmit analog precoding / beamforming operation on the time-domain multi-carrier symbol stream. Each transmitter 418 converts the baseband multi-carrier symbol stream provided by the multi-antenna transmit processor 471 into a radio frequency stream, and then provides it to a different antenna 420.

[0246] In the transmission from the first communication device 410 to the second communication device 450, at the second communication device 450, each receiver 454 receives a signal through its corresponding antenna 452. Each receiver 454 recovers the information modulated onto the RF carrier and converts the RF stream into a baseband multi-carrier symbol stream and provides it to the receiving processor 456. The receiving processor 456 and the multi-antenna receiving processor 458 implement various signal processing functions of the L1 layer. The multi-antenna receiving processor 458 performs a receiving analog precoding / beamforming operation on the baseband multi-carrier symbol stream from the receiver 454. The receiving processor 456 uses a fast Fourier transform (FFT) to convert the baseband multi-carrier symbol stream after the receiving analog precoding / beamforming operation from the time domain to the frequency domain. In the frequency domain, the physical layer data signal and the reference signal are demultiplexed by the receiving processor 456, wherein the reference signal will be used for channel estimation, and the data signal is recovered after multi-antenna detection in the multi-antenna receiving processor 458 to any spatial stream destined for the second communication device 450. The symbols on each spatial stream are demodulated and recovered in the receiving processor 456, and soft decisions are generated. The receiving processor 456 then decodes and deinterleaves the soft decisions to recover the upper layer data and control signals transmitted by the first communication device 410 on the physical channel. The upper layer data and control signals are then provided to the controller / processor 459. The controller / processor 459 implements the functions of the L2 layer. The controller / processor 459 may be associated with a memory 460 that stores program codes and data. The memory 460 may be referred to as a computer-readable medium. In the transmission from the first communication device 410 to the second communication device 450, the controller / processor 459 provides multiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover the upper layer data packets from the core network. The upper layer data packets are then provided to all protocol layers above the L2 layer. Various control signals may also be provided to L3 for L3 processing.

[0247] In the transmission from the second communication device 450 to the first communication device 410, at the second communication device 450, a data source 467 is used to provide upper layer data packets to the controller / processor 459. The data source 467 represents all protocol layers above the L2 layer. Similar to the transmission function at the first communication device 410 described in the transmission from the first communication device 410 to the second communication device 450, the controller / processor 459 implements header compression, encryption, packet segmentation and reordering, and multiplexing between logical and transport channels based on radio resource allocation, and implements L2 layer functions for user plane and control plane. The controller / processor 459 is also responsible for the retransmission of lost packets and signaling to the first communication device 410. The transmit processor 468 performs modulation mapping and channel coding processing, and the multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming processing. Then, the transmit processor 468 modulates the generated spatial stream into a multi-carrier / single-carrier symbol stream, which is then provided to different antennas 452 via the transmitter 454 after analog precoding / beamforming operations in the multi-antenna transmit processor 457. Each transmitter 454 first converts the baseband symbol stream provided by the multi-antenna transmit processor 457 into a radio frequency symbol stream, and then provides it to the antenna 452.

[0248] In the transmission from the second communication device 450 to the first communication device 410, the function at the first communication device 410 is similar to the reception function at the second communication device 450 described in the transmission from the first communication device 410 to the second communication device 450. Each receiver 418 receives a radio frequency signal through its corresponding antenna 420, converts the received radio frequency signal into a baseband signal, and provides the baseband signal to the multi-antenna reception processor 472 and the reception processor 470. The reception processor 470 and the multi-antenna reception processor 472 jointly implement the functions of the L1 layer. The controller / processor 475 implements the L2 layer functions. The controller / processor 475 can be associated with a memory 476 storing program codes and data. The memory 476 can be referred to as a computer-readable medium. In the transmission from the second communication device 450 to the first communication device 410, the controller / processor 475 provides multiplexing between transport and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover the upper layer data packets from the UE 450. Upper layer packets from controller / processor 475 may be provided to the core network.

[0249] As an embodiment, the first node in the present application includes the second communication device 450 , and the second node in the present application includes the first communication device 410 .

[0250] As a sub-embodiment of the above embodiment, the first node is a user equipment, and the second node is a relay node.

[0251] As a sub-embodiment of the above embodiment, the first node is a user equipment, and the second node is a base station device.

[0252] As a sub-embodiment of the above embodiment, the first node is a relay node, and the second node is a base station device.

[0253] As a sub-embodiment of the above embodiment, the second communication device 450 includes: at least one controller / processor; the at least one controller / processor is responsible for HARQ operation.

[0254] As a sub-embodiment of the above embodiment, the first communication device 410 includes: at least one controller / processor; the at least one controller / processor is responsible for HARQ operation.

[0255] As a sub-embodiment of the above embodiment, the first communication device 410 includes: at least one controller / processor; the at least one controller / processor is responsible for error detection using positive acknowledgement (ACK) and / or negative acknowledgement (NACK) protocols to support HARQ operations.

[0256] As an embodiment, the second communication device 450 includes: at least one processor and at least one memory, wherein the at least one memory includes computer program code; the at least one memory and the computer program code are configured to be used together with the at least one processor. The second communication device 450 device at least: receives at least one of multiple reference signals; selects a first reference signal, which is one of the multiple reference signals; determines a target PRACH opportunity group; and sends a first random access preamble code in the target PRACH opportunity group; wherein, determining the target PRACH opportunity group includes: determining a first element from a first set; the first set includes multiple elements, each element in the first set includes at least one PRACH opportunity mapped to the first reference signal; determining the target PRACH opportunity group includes: randomly selecting a PRACH opportunity group with medium probability from the first PRACH opportunity group set; each PRACH opportunity group in the first PRACH opportunity group set is mapped to the first reference signal, and each PRACH opportunity group in the first PRACH opportunity group set includes K PRACH opportunities, where K is a positive integer greater than 1; a first type of period includes multiple associated mode periods, and the first PRACH opportunity group set depends on the first type of period.

[0257] As a sub-embodiment of the above embodiment, the second communication device 450 corresponds to the first node in this application.

[0258] As an embodiment, the second communication device 450 includes: a memory storing a computer-readable instruction program, the computer-readable instruction program generates an action when executed by at least one processor, the action including: receiving at least one of a plurality of reference signals; selecting a first reference signal, the first reference signal being one of the plurality of reference signals; determining a target PRACH opportunity group; sending a first random access preamble in the target PRACH opportunity group; wherein, determining the target PRACH opportunity group includes: determining a first element from a first set; the first set includes a plurality of elements, each element in the first set includes at least one PRACH opportunity mapped to the first reference signal; determining the target PRACH opportunity group includes: randomly selecting a PRACH opportunity group with medium probability from the first PRACH opportunity group set; each PRACH opportunity group in the first PRACH opportunity group set is mapped to the first reference signal, each PRACH opportunity group in the first PRACH opportunity group set includes K PRACH opportunities, and K is a positive integer greater than 1; a first type of period includes a plurality of associated mode periods, and the first PRACH opportunity group set depends on the first type of period.

[0259] As a sub-embodiment of the above embodiment, the second communication device 450 corresponds to the first node in this application.

[0260] As an embodiment, the first communication device 410 includes: at least one processor and at least one memory, wherein the at least one memory includes computer program code; the at least one memory and the computer program code are configured to be used together with the at least one processor. The first communication device 410 device at least: sends multiple reference signals; receives a first random access preamble code in a target PRACH opportunity group; wherein the transmitter of the first random access preamble code selects a first reference signal and determines the target PRACH opportunity group; the first reference signal is one of the multiple reference signals; the determination of the target PRACH opportunity group includes: determining a first element from a first set; the first set includes multiple elements, each element in the first set includes at least one PRACH opportunity mapped to the first reference signal; the determination of the target PRACH opportunity group includes: randomly selecting a PRACH opportunity group with medium probability from the first PRACH opportunity group set; each PRACH opportunity group in the first PRACH opportunity group set is mapped to the first reference signal, and each PRACH opportunity group in the first PRACH opportunity group set includes K PRACH opportunities, and K is a positive integer greater than 1; the first type of period includes multiple associated mode periods, and the first PRACH opportunity group set depends on the first type of period.

[0261] As a sub-embodiment of the above embodiment, the first communication device 410 corresponds to the second node in this application.

[0262] As an embodiment, the first communication device 410 includes: a memory storing a computer-readable instruction program, the computer-readable instruction program generates an action when executed by at least one processor, the action including: sending multiple reference signals; receiving a first random access preamble in a target PRACH opportunity group; wherein the transmitter of the first random access preamble selects a first reference signal and determines the target PRACH opportunity group; the first reference signal is one of the multiple reference signals; the determining the target PRACH opportunity group includes: determining a first element from a first set; the first set includes multiple elements, the Each element in the first set includes at least one PRACH opportunity mapped to the first reference signal; the determining of the target PRACH opportunity group includes: randomly selecting a PRACH opportunity group with medium probability from the first PRACH opportunity group set; each PRACH opportunity group in the first PRACH opportunity group set is mapped to the first reference signal, and each PRACH opportunity group in the first PRACH opportunity group set includes K PRACH opportunities, and K is a positive integer greater than 1; the first type of period includes multiple associated mode periods, and the first PRACH opportunity group set depends on the first type of period.

[0263] As a sub-embodiment of the above embodiment, the first communication device 410 corresponds to the second node in this application.

[0264] As an embodiment, at least one of {the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456, the controller / processor 459, the memory 460, the data source 467} is used to receive the first information block in the present application.

[0265] As an embodiment, at least one of {the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416, the controller / processor 475, and the memory 476} is used to send the first information block in the present application.

[0266] As an embodiment, at least one of {the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456, the controller / processor 459, the memory 460, the data source 467} is used to receive at least one of the multiple reference signals in the present application.

[0267] As an embodiment, at least one of {the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416, the controller / processor 475, and the memory 476} is used to send the multiple reference signals in the present application.

[0268] As an embodiment, at least one of {the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456, the controller / processor 459, the memory 460, the data source 467} is used to select the first reference signal in the present application.

[0269] As an embodiment, at least one of {the antenna 452, the transmitter 454, the multi-antenna transmit processor 457, the transmit processor 468, the controller / processor 459, the memory 460, the data source 467} is used to determine the target PRACH opportunity group in the present application.

[0270] As an embodiment, at least one of {the antenna 452, the transmitter 454, the multi-antenna transmit processor 457, the transmit processor 468, the controller / processor 459, the memory 460, the data source 467} is used to send the first random access preamble code in the present application in the target PRACH opportunity group in the present application.

[0271] As an embodiment, at least one of {the antenna 420, the receiver 418, the multi-antenna receiving processor 472, the receiving processor 470, the controller / processor 475, and the memory 476} is used to receive the first random access preamble code in the present application in the target PRACH opportunity group in the present application.

[0272] Example 5

[0273] Embodiment 5 illustrates a 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 embodiment, the first node U1 and the second node U2 communicate with each other through the air interface. Figure 5 , the steps in the dashed box F1 are optional.

[0274] The first node U1 receives a first information block in step S510; receives at least one of a plurality of reference signals in step S511; selects a first reference signal in step S51A; determines a target PRACH opportunity group in step S51B; and sends a first random access preamble code in the target PRACH opportunity group in step S512.

[0275] The second node U2 sends a first information block in step S520; sends multiple reference signals in step S521; and receives a first random access preamble code in a target PRACH opportunity group in step S522.

[0276] In embodiment 5, the multiple reference signals are respectively multiple SSBs, and the first reference signal is one of the multiple reference signals; determining the target PRACH opportunity group includes: determining a first element from a first set; the first set includes multiple elements, and each element in the first set includes at least one PRACH opportunity mapped to the first reference signal; determining the target PRACH opportunity group includes: randomly selecting a PRACH opportunity group with medium probability from the first PRACH opportunity group set; each PRACH opportunity group in the first PRACH opportunity group set is mapped to the first reference signal, and each PRACH opportunity group in the first PRACH opportunity group set includes K PRACH opportunities, The K is a positive integer greater than 1; the first type of period includes multiple associated mode periods, and the first PRACH opportunity group set depends on the first type of period; the target PRACH opportunity group is the one PRACH opportunity group selected from the first PRACH opportunity group set; each element in the first set is a PRACH opportunity, and each PRACH opportunity in the first set is mapped to the first reference signal; the first PRACH opportunity group set depends on the first element; the PRACH opportunity groups in the first PRACH opportunity group set are all in the same first type of period, and the starting PRACH opportunity of each PRACH opportunity group in the first PRACH opportunity group set is not earlier than the first element.

[0277] As a sub-embodiment of Embodiment 5, the first information block includes indication information of the PRACH mask index; determination of the target PRACH opportunity group depends on the first information block, and each PRACH opportunity in the target PRACH opportunity group is a PRACH opportunity indicated by the first information block.

[0278] As an embodiment, the first node U1 is the first node in this application.

[0279] As an embodiment, the second node U2 is the second node in the present application.

[0280] As an embodiment, the first node U1 is a UE.

[0281] As an embodiment, the second node U2 is a base station.

[0282] As an embodiment, the air interface between the second node U2 and the first node U1 is a Uu interface.

[0283] As an embodiment, the air interface between the second node U2 and the first node U1 includes a cellular link.

[0284] As an embodiment, the air interface between the second node U2 and the first node U1 includes a wireless interface between a base station device and a user equipment.

[0285] As an embodiment, the air interface between the second node U2 and the first node U1 includes a wireless interface between a satellite device and a user equipment.

[0286] As an embodiment, the air interface between the second node U2 and the first node U1 includes a wireless interface between a relay device and a user equipment.

[0287] As an embodiment, the steps in the dashed box F1 exist.

[0288] As an embodiment, the steps in the dashed box F1 do not exist.

[0289] Example 6

[0290] Embodiment 6 illustrates a schematic diagram of the elements in the first set according to an embodiment of the present application, as shown in the attached figure. Figure 6 shown.

[0291] In Embodiment 6, each element in the first set is a PRACH opportunity group, each PRACH opportunity group in the first set is mapped to the first reference signal, and each PRACH opportunity group in the first set includes K PRACH opportunities.

[0292] As an embodiment, the statement "determine a first element from a first set" includes: the first element is a next available PRACH opportunity group in the first set.

[0293] As an embodiment, the first element is the next available PRACH opportunity group in the first set.

[0294] As an embodiment, the benefits of the above method include: reducing the transmission delay of PRACH.

[0295] As an embodiment, a starting PRACH opportunity of the next available PRACH opportunity group in the first set is no later than a starting PRACH opportunity of any available PRACH opportunity group in the first set.

[0296] As an embodiment, the starting PRACH opportunity of each PRACH opportunity group in the first PRACH opportunity group set is no earlier than the first element.

[0297] As an embodiment, the benefits of the above method include: ensuring that the first node can obtain the uplink coverage gain brought by PRACH transmission using K PRACH opportunities.

[0298] As an embodiment, the starting PRACH opportunity of a PRACH opportunity group is the first PRACH opportunity in the PRACH opportunity group.

[0299] As an embodiment, the starting PRACH opportunity of a PRACH opportunity group is the earliest PRACH opportunity in the PRACH opportunity group in terms of time domain resources occupied.

[0300] As an embodiment, the starting PRACH opportunity of a PRACH opportunity group is the PRACH opportunity with the earliest starting time in the PRACH opportunity group.

[0301] As an embodiment, the starting PRACH opportunity of a PRACH opportunity group is the PRACH opportunity with the earliest end time in the PRACH opportunity group.

[0302] As an embodiment, in the present application, any two PRACH opportunities in a PRACH opportunity group do not overlap in the time domain.

[0303] As an embodiment, the benefits of the above method include: reducing the complexity of system design.

[0304] As an embodiment, when the start time of one PRACH opportunity is not later than the start time of another PRACH opportunity, the one PRACH opportunity is not later than the other PRACH opportunity.

[0305] As an embodiment, when the end time of one PRACH opportunity is not later than the end time of another PRACH opportunity, the one PRACH opportunity is not later than the other PRACH opportunity.

[0306] As an embodiment, when the starting PRACH opportunity of a PRACH opportunity group including K PRACH opportunities is after the UE completes the preparation for sending PRACH, the PRACH opportunity group is an available PRACH opportunity group.

[0307] As an embodiment, when the start time of the earliest PRACH opportunity in a PRACH opportunity group including K PRACH opportunities is later than the end time when the UE completes preparation for sending PRACH, the PRACH opportunity group is an available PRACH opportunity group.

[0308] As an embodiment, the given PRACH opportunity group is any PRACH opportunity group in the first set; when the starting PRACH opportunity of the given PRACH opportunity group is after the UE completes preparation for sending PRACH, the given PRACH opportunity group is an available PRACH opportunity group.

[0309] As an embodiment, the given PRACH opportunity group is any PRACH opportunity group in the first set; when the start time of the earliest PRACH opportunity in the given PRACH opportunity group is later than the end time when the UE completes preparation for sending PRACH, the given PRACH opportunity group is an available PRACH opportunity group.

[0310] As an embodiment, when all K PRACH opportunities included in a PRACH opportunity group can be used to perform PRACH transmission, the PRACH opportunity group is an available PRACH opportunity group.

[0311] As an embodiment, the UE completes the preparation for sending PRACH including: selecting the first reference signal.

[0312] As an embodiment, the UE completes the preparation for sending PRACH including: selecting the first random access preamble code.

[0313] As an embodiment, the UE completes the preparation for sending PRACH including: selecting a random access preamble group A or B.

[0314] As an embodiment, the UE completes the preparation for sending PRACH including: determining the target PRACH opportunity group.

[0315] Example 7

[0316] Embodiment 7 illustrates a schematic diagram of the relationship between the first set, the first reference signal, the first PRACH opportunity group set, the first type of period, and the first element according to an embodiment of the present application, as shown in the attached figure. Figure 7 shown.

[0317] In embodiment 7, each element in the first set is a PRACH opportunity, and each PRACH opportunity in the first set is mapped to the first reference signal; the PRACH opportunity groups in the first PRACH opportunity group set are all in the same first type period, and the starting PRACH opportunity of each PRACH opportunity group in the first PRACH opportunity group set is not earlier than the first element.

[0318] As an embodiment, the first PRACH opportunity group set depends on the first element.

[0319] As an embodiment, when the start time of one PRACH opportunity is not earlier than the start time of another PRACH opportunity, the one PRACH opportunity is not earlier than the other PRACH opportunity.

[0320] As an embodiment, when the end time of one PRACH opportunity is not earlier than the end time of another PRACH opportunity, the one PRACH opportunity is not earlier than the other PRACH opportunity.

[0321] As an embodiment, each element in the first set is a PRACH opportunity, the first value is the sum of the index of the first element and the sorting index of the time slot occupied by the first element in a system frame, the second value is twice the index of the first element, and the first PRACH opportunity group set includes a PRACH opportunity group with an index of the first value and a PRACH opportunity group with an index of the second value in the 8th first type period after the first type period in which the first element is located.

[0322] As an embodiment, each element in the first set is a PRACH opportunity.

[0323] As an embodiment, the first element is the next available PRACH opportunity in the first set.

[0324] As an embodiment, the benefits of the above method include: reducing the transmission delay of PRACH.

[0325] As an embodiment, the next available PRACH opportunity in the first set is no later than any available PRACH opportunity in the first set.

[0326] As an embodiment, the starting PRACH opportunity of each PRACH opportunity group in the first PRACH opportunity group set is no earlier than the first element.

[0327] As an embodiment, the benefits of the above method include: ensuring the transmission performance of the first random access preamble code.

[0328] As an embodiment, the starting PRACH opportunity of a PRACH opportunity group is the first PRACH opportunity in the PRACH opportunity group.

[0329] As an embodiment, the starting PRACH opportunity of a PRACH opportunity group is the earliest PRACH opportunity in the PRACH opportunity group in terms of time domain resources occupied.

[0330] As an embodiment, the starting PRACH opportunity of a PRACH opportunity group is the PRACH opportunity with the earliest starting time in the PRACH opportunity group.

[0331] As an embodiment, the starting PRACH opportunity of a PRACH opportunity group is the PRACH opportunity with the earliest end time in the PRACH opportunity group.

[0332] As an embodiment, in the present application, any two PRACH opportunities in a PRACH opportunity group do not overlap in the time domain.

[0333] As an embodiment, the benefits of the above method include: reducing the complexity of system design.

[0334] As an embodiment, when the start time of one PRACH opportunity is not later than the start time of another PRACH opportunity, the one PRACH opportunity is not later than the other PRACH opportunity.

[0335] As an embodiment, when the end time of one PRACH opportunity is not later than the end time of another PRACH opportunity, the one PRACH opportunity is not later than the other PRACH opportunity.

[0336] As an embodiment, when a PRACH opportunity is after the UE completes preparation for sending a PRACH, the PRACH opportunity is an available PRACH opportunity.

[0337] As an embodiment, when the start time of a PRACH opportunity is later than the end time when the UE completes preparation for sending the PRACH, the PRACH opportunity is an available PRACH opportunity.

[0338] As an embodiment, the given PRACH opportunity is any PRACH opportunity in the first set; when the given PRACH opportunity is after the UE completes preparation for sending PRACH, the given PRACH opportunity is an available PRACH opportunity.

[0339] As an embodiment, the given PRACH opportunity is any PRACH opportunity in the first set; when the start time of the given PRACH opportunity is later than the end time when the UE completes preparation for sending PRACH, the given PRACH opportunity is an available PRACH opportunity.

[0340] As an embodiment, when a PRACH opportunity can be used to perform PRACH transmission, the PRACH opportunity is an available PRACH opportunity.

[0341] As an embodiment, the UE completes the preparation for sending PRACH including: selecting the first reference signal.

[0342] As an embodiment, the UE completes the preparation for sending PRACH including: selecting the first random access preamble code.

[0343] As an embodiment, the UE completes the preparation for sending PRACH including: selecting a random access preamble group A or B.

[0344] As an embodiment, the UE completes the preparation for sending PRACH including: determining the target PRACH opportunity group.

[0345] Example 8

[0346] Embodiment 8 illustrates a schematic diagram for illustrating a first PRACH opportunity group set according to an embodiment of the present application, as shown in the attached Figure 8 As shown in the attached Figure 8 In the figure, each box represents a PRACH opportunity; two gray filled boxes represent the first PRACH opportunity group, two blank boxes represent the second PRACH opportunity group, two slash filled boxes represent the third PRACH opportunity group, and two horizontal and vertical line filled boxes represent the fourth PRACH opportunity group; each box with a bold border represents the starting PRACH opportunity in the corresponding PRACH opportunity group.

[0347] In Embodiment 8, the K is equal to 2; any one of the first PRACH opportunity group, the second PRACH opportunity group, the third PRACH opportunity group and the fourth PRACH opportunity group includes 2 PRACH opportunities, and these 4 PRACH opportunity groups are in the same first type cycle; each element in the first set is a PRACH opportunity group, and the first element is determined to be the second PRACH opportunity group; the first PRACH opportunity group set includes the second PRACH opportunity group, the third PRACH opportunity group and the fourth PRACH opportunity group, but does not include the first PRACH opportunity group.

[0348] As an embodiment, the starting PRACH opportunity of each PRACH opportunity group in the first PRACH opportunity group set is no earlier than the first element.

[0349] Example 9

[0350] Embodiment 9 illustrates a schematic diagram for illustrating a first PRACH opportunity group set according to an embodiment of the present application, as shown in the attached Fig. 9 As shown in the attached Fig. 9 In the figure, each box represents a PRACH opportunity; 4 gray filled boxes represent the first PRACH opportunity group, 4 blank boxes represent the second PRACH opportunity group, 4 diagonal filled boxes represent the third PRACH opportunity group, and 4 horizontal and vertical line filled boxes represent the fourth PRACH opportunity group; each box with a bold border represents the starting PRACH opportunity in the corresponding PRACH opportunity group.

[0351] In Embodiment 9, the K is equal to 4; any one of the first PRACH opportunity group, the second PRACH opportunity group, the third PRACH opportunity group and the fourth PRACH opportunity group includes 4 PRACH opportunities, and these 4 PRACH opportunity groups are in the same first type cycle; each element in the first set is a PRACH opportunity, and the first element is determined as the starting PRACH opportunity of the fourth PRACH opportunity group; the first PRACH opportunity group set includes the third PRACH opportunity group and the fourth PRACH opportunity group, but does not include the first PRACH opportunity group and the second PRACH opportunity group.

[0352] As an embodiment, the starting PRACH opportunity of each PRACH opportunity group in the first PRACH opportunity group set is no earlier than the first element.

[0353] As an embodiment, each element in the first set is a PRACH opportunity; the target period is the first type period in which the first element is located; if there is no PRACH opportunity group in the target period whose starting PRACH opportunity is not earlier than the first element and includes K PRACH opportunities, then the first PRACH opportunity group set includes the PRACH opportunity group in the first first type period after the target period.

[0354] Example 10

[0355] Embodiment 10 illustrates a schematic diagram of a first information block according to an embodiment of the present application, as shown in the attached figure. Fig.10 shown.

[0356] In embodiment 10, the first node receives a first information block; wherein the first information block includes indication information of a PRACH mask index; and determination of the target PRACH opportunity group depends on the first information block.

[0357] As an embodiment, the benefits of the above method include: using the existing 3GPP PRACH mask index indication signaling to implement the indication of the PRACH opportunity group, thereby simplifying the system design.

[0358] As an embodiment, the benefits of the above method include: being beneficial to improving the performance of non-contention random access.

[0359] As an embodiment, the first information block includes RRC layer parameters.

[0360] As an embodiment, the first information block is ra-ssb-OccasionMaskIndex.

[0361] As an embodiment, the first information block includes a PDCCH (Physical downlink control channel) command (PDCCH order).

[0362] As an embodiment, each PRACH opportunity in the target PRACH opportunity group is a PRACH opportunity indicated by the first information block.

[0363] As an embodiment, the first set depends on the first information block.

[0364] As an embodiment, each element in the first set is a PRACH opportunity group, and each PRACH opportunity in each PRACH opportunity group in the first set is a PRACH opportunity indicated by the first information block.

[0365] As a sub-embodiment of the above embodiment, when at least one PRACH opportunity in a PRACH opportunity group is not a PRACH opportunity indicated by the first information block, the PRACH opportunity group does not belong to the first set.

[0366] As an embodiment, the first PRACH opportunity group set depends on the first information block.

[0367] As an embodiment, each PRACH opportunity in each PRACH opportunity group in the first PRACH opportunity group set is a PRACH opportunity indicated by the first information block.

[0368] As a sub-embodiment of the above embodiment, when at least one PRACH opportunity in a PRACH opportunity group is not a PRACH opportunity indicated by the first information block, the PRACH opportunity group does not belong to the first PRACH opportunity group set.

[0369] As an embodiment, a prerequisite for the first node to determine the target PRACH opportunity group is that each PRACH opportunity in the target PRACH opportunity group is a PRACH opportunity indicated by the first information block.

[0370] As an embodiment, the benefits of the above method include: improving the constraint effect of the indication signaling of the PRACH mask index on the selection of the PRACH opportunity group, which is beneficial to system optimization.

[0371] As an embodiment, at least one PRACH opportunity in the target PRACH opportunity group is a PRACH opportunity indicated by the first information block.

[0372] As an embodiment, the first set depends on the first information block.

[0373] As an embodiment, each element in the first set is a PRACH opportunity group, and at least one PRACH opportunity in each PRACH opportunity group in the first set is a PRACH opportunity indicated by the first information block.

[0374] As a sub-embodiment of the above embodiment, when each PRACH opportunity in a PRACH opportunity group is not a PRACH opportunity indicated by the first information block, the PRACH opportunity group does not belong to the first set.

[0375] As an embodiment, the first PRACH opportunity group set depends on the first information block.

[0376] As an embodiment, at least one PRACH opportunity in each PRACH opportunity group in the first PRACH opportunity group set is a PRACH opportunity indicated by the first information block.

[0377] As a sub-embodiment of the above embodiment, when each PRACH opportunity in a PRACH opportunity group is not a PRACH opportunity indicated by the first information block, the PRACH opportunity group does not belong to the first PRACH opportunity group set.

[0378] As an embodiment, a prerequisite for the first node to determine the target PRACH opportunity group is that at least one PRACH opportunity in the target PRACH opportunity group is a PRACH opportunity indicated by the first information block.

[0379] As an embodiment, the benefits of the above method include: improving the flexibility of the first node in selecting the PRACH opportunity group.

[0380] As an embodiment, the first information block indicates at least one PRACH opportunity, and the at least one PRACH opportunity is allowed to send PRACH.

[0381] Embodiment 11

[0382] Embodiment 11 illustrates a structural block diagram of a processing device in a first node device, as shown in the attached figure. Fig.11 As shown in the attached Fig.11 In the embodiment, the first node device processing apparatus A00 includes a first receiver A01 and a first transmitter A02.

[0383] As an embodiment, the first node device A00 is a user equipment.

[0384] As an embodiment, the first node device A00 is a relay node.

[0385] As an embodiment, the first node device A00 is a vehicle-mounted communication device.

[0386] As an embodiment, the first receiver A01 includes the attached Figure 4 At least one of the antenna 452, receiver 454, multi-antenna reception processor 458, reception processor 456, controller / processor 459, memory 460 and data source 467.

[0387] As an embodiment, the first receiver A01 includes the attached Figure 4At least the first five of the antenna 452, receiver 454, multi-antenna receive processor 458, receive processor 456, controller / processor 459, memory 460 and data source 467.

[0388] As an embodiment, the first receiver A01 includes the attached Figure 4 At least the first four of the antenna 452, receiver 454, multi-antenna receive processor 458, receive processor 456, controller / processor 459, memory 460 and data source 467.

[0389] As an embodiment, the first receiver A01 includes the attached Figure 4 At least the first three of the antenna 452, receiver 454, multi-antenna receive processor 458, receive processor 456, controller / processor 459, memory 460 and data source 467.

[0390] As an embodiment, the first receiver A01 includes the attached Figure 4 At least the first two of the antenna 452, receiver 454, multi-antenna receive processor 458, receive processor 456, controller / processor 459, memory 460 and data source 467.

[0391] As an embodiment, the first transmitter A02 includes the attached Figure 4 At least one of the antenna 452, transmitter 454, multi-antenna transmit processor 457, transmit processor 468, controller / processor 459, memory 460 and data source 467.

[0392] As an embodiment, the first transmitter A02 includes the attached Figure 4 At least the first five of the antenna 452, transmitter 454, multi-antenna transmit processor 457, transmit processor 468, controller / processor 459, memory 460 and data source 467.

[0393] As an embodiment, the first transmitter A02 includes the attached Figure 4 At least the first four of the antenna 452, transmitter 454, multi-antenna transmit processor 457, transmit processor 468, controller / processor 459, memory 460 and data source 467.

[0394] As an embodiment, the first transmitter A02 includes the attached Figure 4 At least the first three of the antenna 452, transmitter 454, multi-antenna transmit processor 457, transmit processor 468, controller / processor 459, memory 460 and data source 467.

[0395] As an embodiment, the first transmitter A02 includes the attached Figure 4 At least the first two of the antenna 452, transmitter 454, multi-antenna transmit processor 457, transmit processor 468, controller / processor 459, memory 460 and data source 467.

[0396] As an embodiment, the first receiver A01 receives at least one of a plurality of reference signals and selects a first reference signal, wherein the first reference signal is one of the plurality of reference signals; the first transmitter A02 determines a target PRACH opportunity group and sends a first random access preamble in the target PRACH opportunity group; wherein, determining the target PRACH opportunity group comprises: determining a first element from a first set; the first set comprises a plurality of elements, each element in the first set comprises at least one PRACH opportunity mapped to the first reference signal; determining the target PRACH opportunity group comprises: randomly selecting a PRACH opportunity group with medium probability from the first PRACH opportunity group set; each PRACH opportunity group in the first PRACH opportunity group set is mapped to the first reference signal, each PRACH opportunity group in the first PRACH opportunity group set comprises K PRACH opportunities, and K is a positive integer greater than 1; a first type of period comprises a plurality of associated mode periods, and the first PRACH opportunity group set depends on the first type of period.

[0397] As an embodiment, the first PRACH opportunity group set depends on the first element.

[0398] As an embodiment, each element in the first set is a PRACH opportunity group, each PRACH opportunity group in the first set is mapped to the first reference signal, and each PRACH opportunity group in the first set includes K PRACH opportunities.

[0399] As an embodiment, each element in the first set is a PRACH opportunity, and each PRACH opportunity in the first set is mapped to the first reference signal; the PRACH opportunity groups in the first PRACH opportunity group set are all in the same first type period, and the starting PRACH opportunity of each PRACH opportunity group in the first PRACH opportunity group set is not earlier than the first element.

[0400] As an embodiment, the multiple reference signals are multiple SSBs respectively.

[0401] As an embodiment, the target PRACH opportunity group is the one PRACH opportunity group selected from the first PRACH opportunity group set.

[0402] As an embodiment, the first receiver A01 receives a first information block; wherein the first information block includes indication information of a PRACH mask index; determination of the target PRACH opportunity group depends on the first information block, and each PRACH opportunity in the target PRACH opportunity group is a PRACH opportunity indicated by the first information block.

[0403] Example 12

[0404] Embodiment 12 illustrates a structural block diagram of a processing device in a second node device, as shown in the attached figure. Fig.12 As shown in the attached Fig.12 In the embodiment, the second node device processing apparatus B00 includes a second transmitter B01 and a second receiver B02.

[0405] As an embodiment, the second node device B00 is a base station.

[0406] As an embodiment, the second node device B00 is a satellite device.

[0407] As an embodiment, the second node device B00 is a relay node.

[0408] As an embodiment, the second node device B00 is one of a test device, a test equipment, and a test instrument.

[0409] As an embodiment, the second transmitter B01 includes the attached Figure 4 At least one of the antenna 420, transmitter 418, multi-antenna transmit processor 471, transmit processor 416, controller / processor 475 and memory 476.

[0410] As an embodiment, the second transmitter B01 includes the attached Figure 4 At least the first five of the antenna 420, transmitter 418, multi-antenna transmit processor 471, transmit processor 416, controller / processor 475 and memory 476.

[0411] As an embodiment, the second transmitter B01 includes the attached Figure 4 At least the first four of the antenna 420, transmitter 418, multi-antenna transmit processor 471, transmit processor 416, controller / processor 475 and memory 476.

[0412] As an embodiment, the second transmitter B01 includes the attached Figure 4At least the first three of the antenna 420, transmitter 418, multi-antenna transmit processor 471, transmit processor 416, controller / processor 475 and memory 476.

[0413] As an embodiment, the second transmitter B01 includes the attached Figure 4 At least the first two of the antenna 420, transmitter 418, multi-antenna transmit processor 471, transmit processor 416, controller / processor 475 and memory 476.

[0414] As an embodiment, the second receiver B02 includes the attached Figure 4 At least one of the antenna 420, the receiver 418, the multi-antenna reception processor 472, the reception processor 470, the controller / processor 475 and the memory 476.

[0415] As an embodiment, the second receiver B02 includes the attached Figure 4 At least the first five of the antenna 420, the receiver 418, the multi-antenna receive processor 472, the receive processor 470, the controller / processor 475 and the memory 476.

[0416] As an embodiment, the second receiver B02 includes the attached Figure 4 At least the first four of the antenna 420, the receiver 418, the multi-antenna receive processor 472, the receive processor 470, the controller / processor 475 and the memory 476.

[0417] As an embodiment, the second receiver B02 includes the attached Figure 4 At least the first three of the antenna 420, the receiver 418, the multi-antenna receive processor 472, the receive processor 470, the controller / processor 475 and the memory 476.

[0418] As an embodiment, the second receiver B02 includes the attached Figure 4 At least the first two of the antenna 420, the receiver 418, the multi-antenna reception processor 472, the reception processor 470, the controller / processor 475 and the memory 476.

[0419] As an embodiment, the second transmitter B01 sends multiple reference signals; the second receiver B02 receives a first random access preamble in a target PRACH opportunity group; wherein the transmitter of the first random access preamble selects a first reference signal and determines the target PRACH opportunity group; the first reference signal is one of the multiple reference signals; the determination of the target PRACH opportunity group includes: determining a first element from a first set; the first set includes multiple elements, each element in the first set includes at least one PRACH opportunity mapped to the first reference signal; the determination of the target PRACH opportunity group includes: randomly selecting a PRACH opportunity group with medium probability from the first PRACH opportunity group set; each PRACH opportunity group in the first PRACH opportunity group set is mapped to the first reference signal, and each PRACH opportunity group in the first PRACH opportunity group set includes K PRACH opportunities, and K is a positive integer greater than 1; the first type of period includes multiple associated mode periods, and the first PRACH opportunity group set depends on the first type of period.

[0420] As an embodiment, the first PRACH opportunity group set depends on the first element.

[0421] As an embodiment, each element in the first set is a PRACH opportunity group, each PRACH opportunity group in the first set is mapped to the first reference signal, and each PRACH opportunity group in the first set includes K PRACH opportunities.

[0422] As an embodiment, each element in the first set is a PRACH opportunity, and each PRACH opportunity in the first set is mapped to the first reference signal; the PRACH opportunity groups in the first PRACH opportunity group set are all in the same first type period, and the starting PRACH opportunity of each PRACH opportunity group in the first PRACH opportunity group set is not earlier than the first element.

[0423] As an embodiment, the multiple reference signals are multiple SSBs respectively.

[0424] As an embodiment, the target PRACH opportunity group is the one PRACH opportunity group selected from the first PRACH opportunity group set.

[0425] As an embodiment, the second transmitter B01 sends a first information block; wherein the first information block includes indication information of the PRACH mask index; the determination of the target PRACH opportunity group depends on the first information block, and each PRACH opportunity in the target PRACH opportunity group is the PRACH opportunity indicated by the first information block.

[0426] 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 node device 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 devices, aircraft, airplanes, drones, remote-controlled aircraft and other wireless communication devices. The second node device 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 devices, aircraft, airplanes, drones, remote-controlled aircraft and other wireless communication devices. The user equipment 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 devices, aircraft, airplanes, drones, remote-controlled aircraft and other wireless communication devices. The base station equipment or base station or network side equipment in this application includes but is not limited to macrocellular base stations, microcellular base stations, home base stations, relay base stations, eNB, gNB, transmission receiving node TRP, GNSS, relay satellite, satellite base station, aerial base station, test devices, test equipment, test instruments and other equipment.

[0427] It should be understood by those skilled in the art that the present invention may be implemented in other specified forms without departing from its core or essential features. Therefore, the embodiments disclosed herein should be considered illustrative rather than restrictive in any way. The scope of the invention is determined by the appended claims rather than the preceding description, and all modifications within their equivalent meanings and regions are considered to be included therein.

Claims

1. A first node used for wireless communication, characterized in that: include: A first receiver receives at least one of a plurality of reference signals; selecting a first reference signal, the first reference signal being one of the plurality of reference signals; A first transmitter determines a target PRACH opportunity group; and sends a first random access preamble in the target PRACH opportunity group; Among them, determining the target PRACH opportunity group includes: determining a first element from a first set; the first set includes multiple elements, and each element in the first set includes at least one PRACH opportunity mapped to the first reference signal; determining the target PRACH opportunity group includes: randomly selecting a PRACH opportunity group with medium probability from the first PRACH opportunity group set; each PRACH opportunity group in the first PRACH opportunity group set is mapped to the first reference signal, and each PRACH opportunity group in the first PRACH opportunity group set includes K PRACH opportunities, and K is a positive integer greater than 1; the first type of period includes multiple associated mode periods, and the first PRACH opportunity group set depends on the first type of period.

2. The first node according to claim 1, characterized in that: The first PRACH opportunity group set is dependent on the first element.

3. The first node according to claim 1 or 2, characterized in that: Each element in the first set is a PRACH opportunity group, each PRACH opportunity group in the first set is mapped to the first reference signal, and each PRACH opportunity group in the first set includes K PRACH opportunities.

4. The first node according to claim 1 or 2, characterized in that: Each element in the first set is a PRACH opportunity, and each PRACH opportunity in the first set is mapped to the first reference signal; the PRACH opportunity groups in the first PRACH opportunity group set are all in the same first type period, and the starting PRACH opportunity of each PRACH opportunity group in the first PRACH opportunity group set is not earlier than the first element.

5. The first node according to any one of claims 1 to 4, characterized in that: The multiple reference signals are respectively multiple SSBs.

6. The first node according to any one of claims 1 to 5, characterized in that: The target PRACH opportunity group is the one PRACH opportunity group selected from the first PRACH opportunity group set.

7. The first node according to any one of claims 1 to 6, characterized in that: include: The first receiver receives a first information block; The first information block includes indication information of the PRACH mask index; The determination of the target PRACH opportunity group depends on the first information block, and each PRACH opportunity in the target PRACH opportunity group is a PRACH opportunity indicated by the first information block.

8. A second node used for wireless communication, characterized in that: include: A second transmitter sends a plurality of reference signals; A second receiver receives a first random access preamble in a target PRACH opportunity group; Among them, the transmitter of the first random access preamble code selects a first reference signal and determines the target PRACH opportunity group; the first reference signal is one of the multiple reference signals; the determination of the target PRACH opportunity group includes: determining a first element from a first set; the first set includes multiple elements, and each element in the first set includes at least one PRACH opportunity mapped to the first reference signal; the determination of the target PRACH opportunity group includes: randomly selecting a PRACH opportunity group with medium probability from the first PRACH opportunity group set; each PRACH opportunity group in the first PRACH opportunity group set is mapped to the first reference signal, and each PRACH opportunity group in the first PRACH opportunity group set includes K PRACH opportunities, and K is a positive integer greater than 1; the first type of period includes multiple associated mode periods, and the first PRACH opportunity group set depends on the first type of period.

9. A method in a first node for wireless communication, characterized in that: include: receiving at least one of a plurality of reference signals; selecting a first reference signal, the first reference signal being one of the plurality of reference signals; Determining a target PRACH opportunity group; sending a first random access preamble in the target PRACH opportunity group; Among them, determining the target PRACH opportunity group includes: determining a first element from a first set; the first set includes multiple elements, and each element in the first set includes at least one PRACH opportunity mapped to the first reference signal; determining the target PRACH opportunity group includes: randomly selecting a PRACH opportunity group with medium probability from the first PRACH opportunity group set; each PRACH opportunity group in the first PRACH opportunity group set is mapped to the first reference signal, and each PRACH opportunity group in the first PRACH opportunity group set includes K PRACH opportunities, and K is a positive integer greater than 1; the first type of period includes multiple associated mode periods, and the first PRACH opportunity group set depends on the first type of period.

10. A method in a second node for wireless communication, characterized in that: include: sending a plurality of reference signals; Receiving a first random access preamble in a target PRACH opportunity group; Among them, the transmitter of the first random access preamble code selects a first reference signal and determines the target PRACH opportunity group; the first reference signal is one of the multiple reference signals; the determination of the target PRACH opportunity group includes: determining a first element from a first set; the first set includes multiple elements, and each element in the first set includes at least one PRACH opportunity mapped to the first reference signal; the determination of the target PRACH opportunity group includes: randomly selecting a PRACH opportunity group with medium probability from the first PRACH opportunity group set; each PRACH opportunity group in the first PRACH opportunity group set is mapped to the first reference signal, and each PRACH opportunity group in the first PRACH opportunity group set includes K PRACH opportunities, and K is a positive integer greater than 1; the first type of period includes multiple associated mode periods, and the first PRACH opportunity group set depends on the first type of period.

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