CN113556826B

CN113556826B - Method and apparatus in a node used for wireless communication

Info

Publication number: CN113556826B
Application number: CN202010333080.8A
Authority: CN
Inventors: 张晓博
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Shanghai Langbo Communication Technology Co Ltd
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2022-07-01
Anticipated expiration: 2040-04-24
Also published as: CN113556826A

Abstract

A method and apparatus in a node used for wireless communication is disclosed. A first node monitors K wireless signals, wherein K is a positive integer greater than 1; transmitting a first random access signal in a first random access channel; receiving first signaling on a first control channel; wherein the K wireless signals respectively indicate K indexes, and any one of the K indexes is a candidate index in a first candidate index group; the first candidate index set is one of Q candidate index sets; the first candidate index set is used to determine the first random access channel from a first candidate channel set; a first wireless signal is used to determine a multi-antenna parameter of the first signaling, the first wireless signal being one of the K wireless signals. By the method, waste of cell discovery signals and random access opportunities caused by LBT failure of the unlicensed spectrum can be reduced.

Description

Method and apparatus in a node used for wireless communication

Technical Field

The present application relates to a transmission method and apparatus in a wireless communication system, and more particularly, to an unlicensed spectrum-related transmission scheme and apparatus in wireless communication.

Background

In the future, the application scenes of the wireless communication system are more and more diversified, and different application scenes put different performance requirements on the system. In order to meet different performance requirements of various application scenarios, research on New Radio interface (NR) technology (or fine Generation, 5G) is decided over 72 sessions of 3GPP (3rd Generation Partner Project) RAN (Radio Access Network), and standardization Work on NR is started over WI (Work Item) where NR passes through 75 sessions of 3GPP RAN.

One of the key technologies of NR is to support beam-based signal transmission, and its main application scenario is to enhance the coverage performance of NR devices operating in the millimeter wave frequency band (e.g., greater than 6 GHz). In addition, beam-based transmission techniques are also required to support large-scale antennas at low frequency bands (e.g., less than 6 GHz). Through the weighting process of the antenna array, the rf signal forms a stronger beam in a specific spatial direction, and the rf signal is weaker in other directions. After the operations of beam measurement, beam feedback and the like, the beams of the transmitter and the receiver can be accurately aligned to each other, so that signals are transmitted and received with stronger power, and the coverage performance is improved. The beam measurement and feedback of the NR system operating in the millimeter wave band may be accomplished by a plurality of synchronous broadcast Signal blocks (SS/PBCH blocks, SSBs) and Channel State Information Reference signals (CSI-RS). Different SSBs or CSI-RSs may use different beams for transmission, the SSBs with the same number have the same transmission beam, and a User Equipment (UE) measures the SSBs or CSI-RSs transmitted by a gNB (next generation Node B) and feeds back an SSB index or a CSI-RS resource number to complete beam alignment. In the Random Access process, the number of the SSB is associated with the Physical resource of a PRACH (Physical Random Access CHannel) CHannel, the UE determines the PRACH CHannel resource according to the selected number of the SSB, and since the gNB and the UE have already completed beam alignment on the SSB, beams at both ends of transmission and reception when transmitting the Random Access preamble are also aligned.

In conventional cellular systems, data transmission can only take place over licensed spectrum, however, with the dramatic increase in traffic, especially in some urban areas, licensed spectrum may be difficult to meet traffic demands. 3GPP Release 17 will consider extending the application of NR to unlicensed spectrum above 52.6 GHz. To ensure compatibility with access technologies on other unlicensed spectrum, LBT (Listen Before Talk) techniques are used to avoid interference due to multiple transmitters occupying the same frequency resources at the same time. For unlicensed spectrum above 52.6GHz, it is better to adopt directional lbt (directional lbt) technique to avoid interference because the beam-based signal transmission has obvious directivity.

Disclosure of Invention

The inventors have found through research that the directional LBT technique is beneficial to improve the spectrum multiplexing efficiency and transmission performance of NR systems operating on unlicensed spectrum. Since there is uncertainty about whether LBT succeeds or not and the length of time required for LBT, uncertainty will be generated about whether signals for cell measurement and synchronization (e.g., SSB and CSI-RS) are transmitted and the location of the transmitted resources. Therefore, a method is needed to determine the transmission resource location and the transmission beam of the SSB or CSI-RS after LBT is successful, and further determine the resource and beam of the random access signal, so that the gNB and the UE can accurately complete synchronization and beam alignment.

In view of the above, the present application discloses a solution. It should be noted that, although the above description uses the scenarios of cell discovery and random access in the directional LBT and NR systems as an example, the present application is also applicable to other communication scenarios (e.g., omni-directional LBT, node discovery and random access in the secondary link scenario), and achieves similar technical effects. Furthermore, employing a unified solution for different scenarios (including but not limited to NR system cell discovery and measurement and sidelink scenario node discovery and measurement) also helps to reduce hardware complexity and cost. Without conflict, embodiments and features in embodiments in a first node of the present application may be applied to a second node and vice versa. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

As an example, the term (telematics) in the present application is explained with reference to the definition of the specification protocol TS36 series of 3 GPP.

As an example, the terms in this application are explained with reference to the definitions of the 3GPP specification protocol TS38 series.

As an example, the terms in the present application are explained with reference to the definitions of the 3GPP specification protocol TS37 series.

As an example, the terms in the present application are explained with reference to the definition of the specification protocol of IEEE (Institute of Electrical and Electronics Engineers).

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

monitoring K wireless signals, wherein K is a positive integer greater than 1;

transmitting a first random access signal in a first random access channel;

receiving first signaling on a first control channel;

wherein the K wireless signals are broadcast, the K wireless signals respectively indicate K indexes, and any one of the K indexes is a candidate index in a first candidate index group; the first candidate index set is one of Q candidate index sets, Q being a positive integer greater than 1; the first candidate index set is used to determine the first random access channel from a first candidate channel set, the first candidate channel set comprising Q candidate channels, the first random access channel being one of the Q candidate channels; a first wireless signal is used to determine a multi-antenna parameter of the first signaling, the first wireless signal being one of the K wireless signals, the first wireless signal being self-selected by the first node.

As an embodiment, the characteristics of the above method include: the K wireless signals are sent to the first node by the second node, and the sending beams of the K wireless signals have strong correlation. When the first node transmits a first random access signal to a second node, the first node can receive with the same receiving beam no matter which wireless signal of K wireless signals is selected by the first node for transmission.

As an example, the benefits of the above method include: due to the uncertainty of LBT, when some SSBs associated in a candidate index group cannot be transmitted due to LBT failure, the first node only needs to receive any other SSB in the candidate index group to complete beam alignment in the initial access phase, thereby reducing the probability of beam alignment failure due to LBT failure.

According to one aspect of the present application, the above method is characterized by further comprising: transmitting a second random access signal; wherein the second random access signal indicates an index included in the first wireless signal.

According to one aspect of the present application, the above method is characterized by further comprising: performing a first channel sensing operation prior to transmitting the first random access signal; wherein the first random access signal is transmitted in response to the first channel sensing operation.

As an example, the benefits of the above method include: the first node may perform LBT in K beam directions simultaneously using multiple antenna parameters corresponding to K wireless signals, select one beam direction from the beam directions passed by the LBT, where a wireless signal associated with the beam direction is the first wireless signal, and send the first random access signal using the multiple antenna parameters of the first wireless signal. By the method, the first wireless signal can be flexibly selected according to the LBT result, and the probability that the random access signal cannot be transmitted due to the failure of LBT is reduced.

According to one aspect of the present application, the above method is characterized in that, for any one of the K wireless signals, which is monitored in K time units, K multiple antenna reception parameters are used for monitoring in the K time units, respectively; the K multiple antenna reception parameters are indicated by the K indices, respectively.

According to one aspect of the present application, the above method is characterized by further comprising: receiving a second signaling and a second wireless signal; wherein the second signaling comprises scheduling information of the second wireless signal, the second signaling indicating a first index; a first multi-antenna transmission parameter is used for transmission of the second wireless signal, the first index indicating the first multi-antenna transmission parameter.

According to an aspect of the present application, the method is characterized in that the first radio signal is used to indicate a system frame number of a radio frame to which the first radio signal belongs.

According to an aspect of the application, the method is characterized in that the K indices implicitly indicate the first set of candidate indices.

The application discloses a method in a second node used for wireless communication, characterized by comprising:

respectively sending K wireless signals by adopting K multi-antenna sending parameters, wherein K is a positive integer greater than 1;

receiving a first random access signal in a first random access channel;

wherein the K wireless signals are broadcast, the K wireless signals respectively indicate K indexes, and any index in the K indexes is a candidate index in a first candidate index group; the first candidate index set is one of Q candidate index sets, Q being a positive integer greater than 1; the first candidate index set is used to determine the first random access channel from a first candidate channel set, the first candidate channel set comprising Q candidate channels, the first random access channel being one of the Q candidate channels; the K multiple-antenna transmission parameters are collectively used to determine multiple-antenna reception parameters for the first random access signal.

According to one aspect of the present application, the above method is characterized by further comprising: receiving a second random access signal; wherein the second random access signal indicates an index included in the first wireless signal.

According to one aspect of the application, the method described above is characterized by further comprising: performing a second channel sensing operation prior to transmitting the K wireless signals; wherein the K wireless signals are transmitted in response to the second channel sensing operation.

According to an aspect of the present application, the above method is characterized in that, for any one of the K wireless signals, which is transmitted in K time units, respectively, K multiple antenna transmission parameters are used for transmission in the K time units, respectively; the K multiple antenna transmission parameters are indicated by the K indices, respectively.

According to one aspect of the present application, the above method is characterized by further comprising: transmitting a second signaling and a second wireless signal; wherein the second signaling comprises scheduling information of the second wireless signal, the second signaling indicating a first index; a first multi-antenna transmission parameter is used for transmission of the second wireless signal, the first index indicating the first multi-antenna transmission parameter.

The application discloses a first node used for wireless communication, characterized by comprising:

a first receiver that monitors K wireless signals, K being a positive integer greater than 1;

a first transmitter for transmitting a first random access signal in a first random access channel;

the first receiver receives first signaling on a first control channel;

The present application discloses a second node for wireless communication, comprising:

a second transmitter, which transmits K wireless signals respectively by adopting K multi-antenna transmission parameters, wherein K is a positive integer greater than 1;

a second receiver receiving a first random access signal in a first random access channel;

As an embodiment, the present application has the following advantages:

by the method in this application, the gNB can perform LBT simultaneously using multiple wide beams, each corresponding to multiple indices in a candidate index set. The first successful wide beam of LBT, its corresponding multiple SSBs associated with multiple indices may be transmitted. Meanwhile, the diversity effect is brought by using a plurality of wide beams for LBT, the SSB sending opportunity loss caused by the long-time failure of LBT is avoided, and the expense is reduced;

the UE performs LBT simultaneously in multiple beam directions associated with multiple indexes in the same candidate index group before sending the random access preamble, and can flexibly select a beam according to the LBT result. The simultaneous use of multiple wide beams for LBT brings diversity effect, reducing the probability that random access signals cannot be transmitted due to failure of LBT.

Drawings

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

FIG. 1 illustrates a process flow diagram of a first node of one embodiment of the present application;

FIG. 2 shows a schematic diagram of a network architecture according to an embodiment of the present application;

figure 3 shows a schematic diagram of a radio protocol architecture of a user plane and a control plane according to an embodiment of the present application;

FIG. 4 shows a schematic diagram of a first communication device and a second communication device according to an embodiment of the present application;

FIG. 5 shows a wireless signal transmission flow diagram according to an embodiment of the present application;

fig. 6 shows a schematic diagram of time domain resources occupied by a first set of radio signals according to an embodiment of the present application;

fig. 7 is a diagram illustrating a relationship between time domain resources occupied by a plurality of wireless signal groups and a plurality of candidate channels, respectively, according to an embodiment of the present application;

fig. 8 shows a schematic diagram of time domain resources occupied by a second channel sensing operation and K wireless signals, respectively, according to an embodiment of the present application;

fig. 9 shows a schematic diagram of time domain resources occupied by a first channel sensing operation, a first channel access signal and a second channel access signal according to an embodiment of the present application;

FIG. 10 shows a schematic diagram of multi-antenna parameters for channel sensing operations and multi-antenna parameters for wireless signals according to one embodiment of the present application;

FIG. 11 shows a block diagram of a processing arrangement for use in the first node;

fig. 12 shows a block diagram of a processing means for use in the second node.

Detailed Description

The technical solutions of the present application will be further described in detail with reference to the accompanying drawings, and it should be noted that the embodiments and features of the embodiments of the present application can be arbitrarily combined with each other without conflict.

Example 1

Embodiment 1 illustrates a processing flow diagram of a first node according to an embodiment of the present application, as shown in fig. 1. In fig. 1, each block represents a step. In particular, the order of steps in blocks does not represent a particular chronological relationship between the various steps. In embodiment 1, a first node in the present application monitors K wireless signals in step 101, transmits a first random access signal in a first random access channel in step 102, and receives first signaling on a first control channel in step 103. In this embodiment, the K wireless signals are broadcast, the K wireless signals respectively indicate K indexes, and any one of the K indexes is one candidate index in the first candidate index group; the first candidate index set is one of Q candidate index sets, Q being a positive integer greater than 1; the first candidate index set is used to determine the first random access channel from a first candidate channel set, the first candidate channel set comprising Q candidate channels, the first random access channel being one of the Q candidate channels; a first wireless signal is used to determine a multi-antenna parameter of the first signaling, the first wireless signal being one of the K wireless signals, the first wireless signal being self-selected by the first node.

As an embodiment, the monitoring the K wireless signals includes performing blind detection on the K wireless signals, where the blind detection includes determining whether each of the K wireless signals is correctly detected.

As one embodiment, the monitoring the K wireless signals includes receiving the K wireless signals.

As an embodiment, the monitoring the K wireless signals includes performing blind detection on the K wireless signals and receiving all correctly detected wireless signals in the K wireless signals.

As one embodiment, any one of the K wireless signals is used to determine timing information including at least one of a symbol number, a slot number, a subframe number, and a frame number.

As an embodiment, any one of the K radio signals is used for channel quality measurement.

As an embodiment, any one of the K radio signals is used for neighbor cell channel quality measurement.

As an embodiment, any one of the K radio signals is used for current cell channel quality measurement.

As an embodiment, any one of the K wireless signals is used for beam quality measurement.

As an embodiment, any one of the K wireless signals is used for CSI (Channel Quality Information) measurement.

As an embodiment, any one of the K radio signals is used for interference strength measurement.

As an embodiment, any one of the K wireless signals is used to acquire frequency synchronization.

As an embodiment, any one of the K radio signals is used to obtain a cell physical identity.

As an embodiment, any one of the K radio signals is used to acquire cell broadcast information.

As one embodiment, any one of the K wireless signals includes a physical shared channel.

As one embodiment, any one of the K wireless signals includes a physical broadcast channel.

As one embodiment, any one of the K wireless signals includes a demodulation reference signal.

As one embodiment, any one of the K wireless signals includes an SSB.

As one embodiment, any one of the K wireless signals includes a PSS (Primary Synchronization Signal).

As one embodiment, any one of the K wireless signals includes SSS (Secondary Synchronization Signal).

As an embodiment, any one of the K wireless signals includes a PBCH (Physical Broadcast Channel).

As one embodiment, any one of the K wireless signals includes a DMRS (De-Modulation Reference Signal).

As an embodiment, any one of the K wireless signals includes a CSI-RS.

As an embodiment, any one of the K radio signals includes one CSI-RS resource.

As an embodiment, any one of the K radio signals comprises one CSI-RS port.

As an embodiment, any one of the K wireless signals includes a plurality of CSI-RS ports.

As one embodiment, any one of the K wireless signals is used to transmit MIB (Master Information Block).

As one embodiment, any one of the K wireless signals is used to transmit an SIB (System Information Block).

As an embodiment, time domain resources occupied by any two of the K wireless signals are orthogonal (i.e., do not overlap).

As an embodiment, the multi-antenna transmission parameters of any two of the K wireless signals are different.

As an embodiment, any two of the K wireless signals are not QCL (Quasi-co-located).

As one embodiment, the first signaling is unicast.

As an embodiment, the first signaling is broadcast.

As an embodiment, the first signaling is multicast.

As an embodiment, the first signaling comprises higher layer signaling.

For one embodiment, the first signaling includes rar (random Access response).

As an embodiment, the first signaling includes scheduling information of the RAR.

As an embodiment, the first signaling comprises a random access Msg4(Message 4 ).

As an embodiment, the first signaling includes scheduling information for random access to Msg 4.

As an embodiment, the first signaling comprises a random access MsgB (Message B).

As an embodiment, the first signaling includes scheduling information for random access to MsgB.

As one embodiment, the first signaling includes scheduling information of a SIB.

As one embodiment, the first signaling includes a SIB.

As one embodiment, the first signaling includes physical layer signaling.

As one embodiment, the first signaling includes PDSCH.

As an embodiment, the first signaling includes a psch.

As one embodiment, the first signaling includes a PDCCH.

As an embodiment, the first signaling comprises a PSCCH.

As an embodiment, the first signaling is an Uplink Grant (Uplink Grant) DCI.

As an embodiment, the first signaling is a Downlink Grant (Downlink Grant) DCI.

As one embodiment, the first wireless signal being used to determine the multiple antenna parameter of the first signaling comprises: the multi-antenna transmission parameters of the first wireless signal are the same as the multi-antenna transmission parameters of the first signaling.

As one embodiment, the first wireless signal being used to determine the multiple antenna parameter of the first signaling comprises: the first wireless signal is quasi co-located with the first signaling.

As one embodiment, the first wireless signal being used to determine the multiple antenna parameter of the first signaling comprises: the first wireless signal is quasi co-located with a reference signal included in the first signaling.

As one embodiment, the first wireless signal being used to determine the multiple antenna parameter of the first signaling comprises: the multi-antenna transmission parameters of the first wireless signal can be used to infer the multi-antenna transmission parameters of the first signaling.

As one embodiment, the reception of the first wireless signal is used to determine a multi-antenna transmission parameter of the first random access signal.

As one embodiment, a multi-antenna reception parameter of the first wireless signal is used to determine a multi-antenna transmission parameter of the first random access signal.

As an embodiment, K multiple-antenna reception parameters are used for reception of the first wireless signal, respectively, and the multiple-antenna reception parameter of the first wireless signal is one of the K multiple-antenna reception parameters corresponding to the best reception quality of the first wireless signal.

For one embodiment, the multi-antenna reception parameters include a spatial domain filter (spatial domain filter).

For one embodiment, the multi-antenna transmission parameters include a spatial domain filter (spatial domain filter).

For one embodiment, the multi-antenna reception parameter includes a Spatial correlation (Spatial correlation) parameter.

For one embodiment, the multi-antenna transmission parameters include Spatial correlation (Spatial correlation) parameters.

For one embodiment, the multi-antenna reception parameters include QCL parameters.

For one embodiment, the multi-antenna transmission parameters include QCL parameters.

For one embodiment, the QCL parameters include a QCL type.

As an embodiment, the multi-antenna reception parameters include spatial reception parameters, and the multi-antenna transmission parameters include spatial transmission parameters.

As one embodiment, the multi-antenna reception parameters include a spatial domain reception filter, and the multi-antenna transmission parameters include a spatial domain transmission filter.

As an embodiment, the specific definition of QCL is seen in section 5.1.5 in 3GPP TS 38.214.

As an embodiment, the QCL association of one signal and another signal refers to: all or part of large-scale (properties) characteristics of a wireless signal transmitted on an antenna port corresponding to the other signal can be deduced from all or part of large-scale (properties) characteristics of a wireless signal transmitted on an antenna port corresponding to the one signal.

As an example, the large scale characteristics of a wireless signal include one or more of { delay spread (delay spread), Doppler spread (Doppler spread), Doppler shift (Doppler shift), path loss (path loss), average gain (average gain), average delay (average delay), and Spatial Rx parameters }.

As one embodiment, the Spatial Rx parameters (Spatial Rx parameters) include one or more of { receive beams, receive analog beamforming matrix, receive analog beamforming vector, receive Spatial filtering (Spatial filter), Spatial domain reception filtering (Spatial domain reception filter) }.

As an embodiment, the QCL association of one signal and another signal refers to: the one signal and the other signal have at least one same QCL parameter (QCL parameter).

As an embodiment, the QCL parameters include: { delay spread (delay spread), Doppler spread (Doppler spread), Doppler shift (Doppler shift), path loss (path loss), average gain (average gain), average delay (average delay), Spatial Rx parameters }.

As an embodiment, the QCL association of one signal and another signal refers to: at least one QCL parameter of the other signal can be inferred from the at least one QCL parameter of the one signal.

As an embodiment, the QCL type (QCL type) between one signal and another signal being QCL-type means: the Spatial Rx parameters (Spatial Rx parameters) of the wireless signal transmitted on the antenna port corresponding to the other signal can be inferred from the Spatial Rx parameters (Spatial Rx parameters) of the wireless signal transmitted on the antenna port corresponding to the one signal.

As an embodiment, the QCL type (QCL type) between one signal and another signal being QCL-type means: the one reference signal and the other reference signal can be received with the same Spatial Rx parameters (Spatial Rx parameters).

As an embodiment, the first Control Channel includes a PDCCH (Physical Downlink Control Channel).

As an embodiment, the first control Channel includes a PDSCH (Physical Downlink Shared Channel).

As an embodiment, the first Control Channel comprises a PSCCH (Physical Sidelink Control Channel).

As an embodiment, the first control Channel comprises a psch (Physical Sidelink Shared Channel).

As an embodiment, the first Control channel is a PDCCH, and the first Control channel is transmitted on a COREST (Control resource Set).

As an embodiment, the first control channel is a PDCCH and the first control channel is transmitted on one PDCCH opportunity included in one PDCCH search space.

As an embodiment, the first Control channel is configured with a plurality of TCIs (Transmission Configuration indicators) and is not activated by a MAC CE (Medium Access Control Layer Control Element).

As an embodiment, the TCI is used to indicate a QCL relationship of the DMRS contained by the first control channel and another reference signal, the other reference signal comprising a CSI-RS or an SSB.

For one embodiment, the first control channel is not configured with a TCI.

As an embodiment, the reception of a target wireless signal is used to determine the multi-antenna transmission parameter of the first random access signal, the target wireless signal being one of the K wireless signals and other than the first wireless signal.

As an embodiment, a multi-antenna reception parameter of the target wireless signal is used to determine a multi-antenna transmission parameter of the first random access signal.

As an embodiment, K multiple-antenna reception parameters are respectively used for reception of the target wireless signal, and the multiple-antenna reception parameter of the target wireless signal is one of the K multiple-antenna reception parameters corresponding to a best reception quality of the target wireless signal.

As one embodiment, the reception quality of the target wireless signal is lower than the reception quality of the first wireless signal.

In one embodiment, the K wireless signals respectively correspond to K multi-antenna transmission parameters, and any two multi-antenna transmission parameters of the K multi-antenna transmission parameters cannot be assumed to be QCL.

As an embodiment, two multi-antenna transmission parameters corresponding to any two indexes in the first candidate index set cannot be assumed to be QCLs.

As an embodiment, the first node selects one of the K wireless signals with the best reception quality as the first wireless signal.

As one embodiment, the channel quality comprises RSRP.

As one embodiment, the channel quality comprises RSRQ.

As an embodiment, the channel quality includes SINR.

As an embodiment, the first node randomly selects one from the K wireless signals as the first wireless signal.

As an example, how the first radio signal is selected is implementation dependent (i.e. no standardization is required).

As an example, how to select the first wireless signal is at the discretion of the manufacturer of the first node.

Example 2

Embodiment 2 illustrates a schematic diagram of a network architecture according to the present application, as shown in fig. 2.

Fig. 2 illustrates a diagram of a network architecture 200 for 5G NR, LTE (Long-Term Evolution), and LTE-a (Long-Term Evolution-enhanced) systems. The 5G NR or LTE network architecture 200 may be referred to as a 5GS (5G System )/EPS (Evolved Packet System) 200 or some other suitable terminology. The 5GS/EPS 200 may include one or more UEs (User Equipment) 201, NG-RANs (next generation radio access networks) 202, 5 GCs (5G Core networks )/EPCs (Evolved Packet cores) 210, HSS (Home Subscriber Server)/UDMs (Unified Data Management) 220, and internet services 230. The 5GS/EPS may interconnect with other access networks, but these entities/interfaces are not shown for simplicity. As shown, the 5GS/EPS provides packet switched services, however those skilled in the art will readily appreciate that the various concepts presented throughout this application may be extended to networks providing circuit switched services or other cellular networks. The NG-RAN includes NR node b (gNB)203 and other gnbs 204. The gNB203 provides user and control plane protocol termination towards the UE 201. The gnbs 203 may be connected to other gnbs 204 via an Xn interface (e.g., backhaul). The gNB203 may also be referred to as a base station, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a Basic Service Set (BSS), an Extended Service Set (ESS), a TRP (transmitting receiving node), or some other suitable terminology. The gNB203 provides the UE201 with an access point to the 5GC/EPC 210. Examples of the UE201 include a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a Personal Digital Assistant (PDA), a satellite radio, non-terrestrial base station communications, satellite mobile communications, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a game console, a drone, an aircraft, a narrowband internet of things device, a machine type communication device, a terrestrial vehicle, an automobile, a wearable device, or any other similar functioning device. Those skilled in the art may also refer to UE201 as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile 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 terminology. The gNB203 is connected to the 5GC/EPC210 through the S1/NG interface. The 5GC/EPC210 includes MME (Mobility Management Entity)/AMF (Authentication Management domain)/SMF (Session Management Function) 211, other MME/AMF/SMF214, S-GW (serving Gateway)/UPF (User Plane Function) 212, and P-GW (Packet data Network Gateway)/UPF 213. The MME/AMF/SMF211 is a control node that handles signaling between the UE201 and the 5GC/EPC 210. In general, the MME/AMF/SMF211 provides bearer and connection management. All user IP (Internet protocol) packets are transported through the S-GW/UPF212, which S-GW/UPF212 itself is connected to the P-GW/UPF 213. The P-GW provides UE IP address allocation as well as other functions. The P-GW/UPF213 is connected to the internet service 230. The internet service 230 includes an operator-corresponding internet protocol service, and may specifically include the internet, an intranet, an IMS (IP Multimedia Subsystem), and a packet-switched streaming service.

As an embodiment, the first node in this application includes the gNB 203.

As an embodiment, the second node in this application includes the gNB 203.

As an embodiment, the second node in this application includes the UE 241.

As an embodiment, the first node in this application includes the UE 241.

As an embodiment, the second node in the present application includes the UE 201.

As an embodiment, the second node in this application includes the gNB 204.

As an embodiment, the UE201 is included in the user equipment of the present application.

As an embodiment, the UE241 is included in the user equipment in this application.

As an embodiment, the base station apparatus in this application includes the gNB 203.

As an embodiment, the base station device in this application includes the gNB 204.

As an embodiment, the UE201 supports sidelink transmission.

As an embodiment, the UE201 supports a PC5 interface.

As an embodiment, the UE201 supports the Uu interface.

For one embodiment, the UE241 supports sidelink transmission.

As an embodiment, the UE241 supports a PC5 interface.

As an embodiment, the gNB203 supports the Uu interface.

As an example, the gNB203 supports Integrated Access and Backhaul (IAB).

As an embodiment, the gNB204 supports access backhaul integration.

Example 3

Embodiment 3 shows a schematic diagram of an embodiment of a radio protocol architecture for the user plane and the control plane according to the present application, as shown in fig. 3. Fig. 3 is a schematic diagram illustrating an embodiment of radio protocol architecture for the user plane 350 and the control plane 300, fig. 3 showing the radio protocol architecture for the first node (RSU in UE or V2X, car equipment or car communication module) and the second node (gNB, RSU in UE or V2X, car equipment or car communication module) or the control plane 300 between two UEs in three layers: layer 1, layer 2 and layer 3. Layer 1(L1 layer) is the lowest layer and implements various PHY (physical layer) signal processing functions. The L1 layer will be referred to herein as PHY 301. Layer 2(L2 layer) 305 is above the PHY301, and is responsible for the links between the first and second nodes and the two UEs through the PHY 301. 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 node. The PDCP sublayer 304 provides data ciphering and integrity protection, and the PDCP sublayer 304 also provides handover support for a second node by a first node. The RLC sublayer 303 provides segmentation and reassembly of packets, retransmission of missing packets by ARQ, and the RLC sublayer 303 also provides duplicate packet detection and protocol error detection. The MAC sublayer 302 provides mapping between logical and transport channels and multiplexing of logical channels. The MAC sublayer 302 is also responsible for allocating the various radio resources (e.g., resource blocks) in one cell between the first nodes. The MAC sublayer 302 is also responsible for HARQ operations. The RRC (Radio Resource Control) sublayer 306 in layer 3 (layer L3) in the Control plane 300 is responsible for obtaining Radio resources (i.e., Radio bearers) and configuring the lower layers using RRC signaling between the second node and the first node. The radio protocol architecture of the user plane 350 includes layer 1(L1 layer) and layer 2(L2 layer), the radio protocol architecture in the user plane 350 for the first and second nodes is substantially the same 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 as the corresponding layers and sublayers in the control plane 300, but the PDCP sublayer 354 also provides header compression for upper layer packets to reduce radio transmission overhead. The L2 layer 355 in the user plane 350 further includes a Service Data Adaptation Protocol (SDAP) sublayer 356, and the SDAP sublayer 356 is responsible for mapping between QoS streams and Data Radio Bearers (DRBs) to support diversity of services. Although not shown, the first node may have several upper layers above the L2 layer 355, including a network layer (e.g., IP layer) that terminates at the P-GW on the network side and an application layer that terminates at the other end of the connection (e.g., far end UE, server, etc.).

As an example, the wireless protocol architecture in fig. 3 is applicable to the first node in this application.

As an example, the radio protocol architecture in fig. 3 is applicable to the second node in this application.

Example 4

Embodiment 4 shows a schematic diagram of a first communication device and a second communication device according to the present application, as shown in fig. 4. Fig. 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.

The first communications device 410 includes a controller/processor 475, a memory 476, a receive processor 470, a transmit processor 416, a multiple antenna receive processor 472, a multiple antenna transmit processor 471, a transmitter/receiver 418, and an antenna 420.

The second communications 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.

In the 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 layer L2. In transmissions from the first communications device 410 to the first communications 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 communications 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 and mapping of signal constellation 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 on the coded and modulated symbols to generate one or more spatial streams. Transmit processor 416 then maps each spatial stream to subcarriers, multiplexes with reference signals (e.g., pilots) in the time and/or frequency domain, and then uses an Inverse Fast Fourier Transform (IFFT) to generate the physical channels carrying the time-domain multicarrier symbol streams. The multi-antenna transmit processor 471 then performs analog precoding/beamforming operations on the time domain multi-carrier symbol stream. Each transmitter 418 converts the baseband multicarrier symbol stream provided by the multi-antenna transmit processor 471 into a radio frequency stream that is then provided to a different antenna 420.

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

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

In a transmission from the second communication device 450 to the first communication device 410, the functionality at the first communication device 410 is similar to the receiving functionality 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 an rf signal through its respective antenna 420, converts the received rf signal to a baseband signal, and provides the baseband signal to a multi-antenna receive processor 472 and a receive processor 470. The receive processor 470 and the multiple antenna receive processor 472 collectively implement the functionality of the L1 layer. Controller/processor 475 implements the L2 layer functions. The controller/processor 475 may be associated with a memory 476 that stores program codes and data. Memory 476 may be referred to as a computer-readable medium. In transmissions from the second communications device 450 to the first communications device 410, the controller/processor 475 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover upper layer packets from the UE 450. Upper layer data packets from the controller/processor 475 may be provided to a core network.

As an embodiment, the first node in this application includes the second communication device 450, and the second node in this application includes the first communication device 410.

As an embodiment, the first node in this application includes the first communication device 410, and the second node in this application includes the second communication device 450.

As an embodiment, the first node in this application includes the second communication device 450, and the second node in this application includes the second communication device 450.

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

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

As a sub-embodiment of the above-described 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.

As an embodiment, the second communication device 450 includes: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code are configured for use with the at least one processor. The second communication device 450 apparatus at least: transmitting a first random access signal in a first random access channel; receiving first signaling on a first control channel; wherein the K wireless signals are broadcast, the K wireless signals respectively indicate K indexes, and any one of the K indexes is one candidate index in a first candidate index group; the first candidate index set is one of Q candidate index sets, Q being a positive integer greater than 1; the first candidate index set is used to determine the first random access channel from a first candidate channel set, the first candidate channel set comprising Q candidate channels, the first random access channel being one of the Q candidate channels; a first wireless signal is used to determine a multi-antenna parameter of the first signaling, the first wireless signal being one of the K wireless signals, the first wireless signal being self-selected by the first node.

As an embodiment, the second communication device 450 includes: a memory storing a program of computer readable instructions that when executed by at least one processor result in actions comprising: transmitting a first random access signal in a first random access channel; receiving first signaling on a first control channel; wherein the K wireless signals are broadcast, the K wireless signals respectively indicate K indexes, and any one of the K indexes is a candidate index in a first candidate index group; the first candidate index set is one of Q candidate index sets, Q being a positive integer greater than 1; the first candidate index set is used to determine the first random access channel from a first candidate channel set, the first candidate channel set comprising Q candidate channels, the first random access channel being one of the Q candidate channels; a first wireless signal is used to determine a multi-antenna parameter of the first signaling, the first wireless signal being one of the K wireless signals, the first wireless signal being self-selected by the first node.

As an embodiment, the first communication device 410 includes: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code are configured for use with the at least one processor. The first communication device 410 means at least: respectively sending K wireless signals by adopting K multi-antenna sending parameters, wherein K is a positive integer greater than 1; receiving a first random access signal in a first random access channel; wherein the K wireless signals are broadcast, the K wireless signals respectively indicate K indexes, and any index in the K indexes is a candidate index in a first candidate index group; the first candidate index group is one of Q candidate index groups, wherein Q is a positive integer greater than 1; the first candidate index set is used to determine the first random access channel from a first candidate channel set, the first candidate channel set comprising Q candidate channels, the first random access channel being one of the Q candidate channels; the K multiple-antenna transmission parameters are collectively used to determine multiple-antenna reception parameters for the first random access signal.

As an embodiment, the first communication device 410 includes: a memory storing a program of computer readable instructions that when executed by at least one processor result in actions comprising: respectively sending K wireless signals by adopting K multi-antenna sending parameters, wherein K is a positive integer greater than 1; receiving a first random access signal in a first random access channel; wherein the K wireless signals are broadcast, the K wireless signals respectively indicate K indexes, and any one of the K indexes is a candidate index in a first candidate index group; the first candidate index group is one of Q candidate index groups, wherein Q is a positive integer greater than 1; the first candidate index set is used to determine the first random access channel from a first candidate channel set, the first candidate channel set comprising Q candidate channels, the first random access channel being one of the Q candidate channels; the K multiple-antenna transmission parameters are collectively used to determine multiple-antenna reception parameters for the first random access signal.

As one example, at least one of the antenna 452, the receiver 454, the multi-antenna receive processor 458, the receive processor 456, the controller/processor 459, the memory 460, the data source 467 may be utilized to receive the first signal as described herein.

As one example, at least one of the antenna 452, the receiver 454, the multi-antenna receive processor 458, the receive processor 456, the controller/processor 459, the memory 460, the data source 467 may be utilized to receive the second signal as described herein.

As one example, at least one of the antenna 452, the receiver 454, the multi-antenna receive processor 458, the receive processor 456, the controller/processor 459, the memory 460, the data source 467 may be utilized to receive the third signal as described herein.

As one example, at least one of { the antenna 420, the receiver 418, the multi-antenna reception processor 472, the reception processor 470, the controller/processor 475, the memory 476} is used for transmitting the first signal in the present application.

As one example, at least one of { the antenna 420, the receiver 418, the multi-antenna reception processor 472, the reception processor 470, the controller/processor 475, the memory 476} is used for transmitting the second signal in the present application.

As an example, at least one of { the antenna 420, the receiver 418, the multi-antenna reception processor 472, the reception processor 470, the controller/processor 475, the memory 476} is used for transmitting the third signal in the present application.

Example 5

Embodiment 5 illustrates a wireless signal transmission flow chart according to an embodiment of the present application, as shown in fig. 5. In FIG. 5, communication between the first node U1 and the second node U2 is over an air interface. In fig. 5, the order of the steps in the blocks does not represent a specific chronological relationship between the individual steps.

For the first node U1, monitoring K wireless signals in step S11; performing a second channel sensing operation in step S12; transmitting a first random access signal in step S13; receiving a first signaling in step S14; transmitting a second random access signal in step S15; the second signaling and the second wireless signal are received in step S16. For the second node U2, performing a second channel sensing operation in step S21; transmitting K wireless signals in step S22; receiving a first random access signal in step S23; transmitting a first signaling in step S24; receiving a second random access signal in step S25; the second signaling and the second wireless signal are transmitted in step S26. Wherein step S21 in block F51 is optional; step S12 in block F52 is optional; steps S15 and S25 in block F53 are optional; s26 and S16 in block F54 are optional.

In embodiment 5, the K wireless signals are broadcast, the K wireless signals respectively indicate K indexes, and any one of the K indexes is one candidate index in the first candidate index group; the first candidate index set is one of Q candidate index sets, Q being a positive integer greater than 1; the first candidate index set is used to determine the first random access channel from a first candidate channel set, the first candidate channel set comprising Q candidate channels, the first random access channel being one of the Q candidate channels; the K multiple-antenna transmission parameters are collectively used to determine multiple-antenna reception parameters for the first random access signal. The second channel sensing operation is used to determine whether the K wireless signals are transmitted. The second random access signal indicates an index included in the first wireless signal. The second signaling comprises scheduling information of the second wireless signal, the second signaling indicating a first index; a first multi-antenna transmission parameter is used for transmission of the second wireless signal, the first index indicating the first multi-antenna transmission parameter.

As an embodiment, the first multi-antenna reception parameter is one of the K multi-antenna reception parameters in the present application.

As one embodiment, the first index indicates one of the K indices.

For one embodiment, the first index indicates one of the Q candidate index groups.

As an embodiment, the second signaling is dynamic signaling.

As an embodiment, the second signaling is layer 1(L1) signaling.

As an embodiment, the second signaling is layer 1(L1) control signaling.

As an embodiment, the second signaling is transmitted on a SideLink (SideLink).

As an embodiment, the second signaling is transmitted through a PC5 interface.

As an embodiment, the second signaling is transmitted on a DownLink (DownLink).

As an embodiment, the second signaling is transmitted over a Uu interface.

As an embodiment, the second signaling is Unicast (Unicast) transmission.

As an embodiment, the second signaling is transmitted by multicast (Groupcast).

As an embodiment, the second signaling is transmitted in a broadcast (borradcast).

As an embodiment, the second signaling is cell-specific.

As an embodiment, the second signaling is user equipment specific.

For one embodiment, the second signaling includes one or more fields in a PHY (Physical layer) layer signaling.

As an embodiment, the second signaling includes SCI (Sidelink Control Information).

As an embodiment, the second signaling comprises one or more fields in one SCI.

As an embodiment, the second signaling includes one or more fields in an SCI format.

As an embodiment, the second signaling includes DCI (Downlink Control Information).

As an embodiment, the second signaling includes one or more fields in one DCI.

As an embodiment, the second signaling is semi-statically configured.

As an embodiment, the second signaling is dynamically configured.

As an embodiment, the second signaling is sent on a PDCCH (Physical Downlink Control Channel).

As an embodiment, the second signaling is sent on a PDSCH (Physical Downlink Shared Channel).

As an embodiment, the second signaling is sent on a psch (Physical Sidelink Shared Channel).

As an embodiment, the second signaling is sent on a PSCCH (Physical Sidelink Control Channel).

For one embodiment, the second wireless signal comprises a baseband signal.

As one embodiment, the second wireless signal is transmitted on a SideLink (SideLink).

As one embodiment, the second wireless signal is transmitted on a DownLink (DownLink).

For one embodiment, the second wireless signal is transmitted over a Backhaul link (Backhaul).

As an embodiment, the second radio signal is transmitted over a Uu interface.

As an example, the second wireless signal is transmitted through a PC5 interface.

As one embodiment, the second wireless signal is transmitted by Unicast (Unicast).

As an embodiment, the second wireless signal is transmitted by multicast (Groupcast).

As one embodiment, the second wireless signal is multicast (multicast) transmitted.

As one embodiment, the second wireless signal is Broadcast (Broadcast) transmitted.

As an embodiment, the second wireless signal carries a Transport Block (TB).

As an embodiment, the second wireless signal carries one CB (Code Block).

As an embodiment, the second wireless signal carries a CBG (Code Block Group).

As one embodiment, the second wireless signal includes a Physical Uplink Shared Channel (PUSCH).

As an embodiment, the second wireless signal includes a Physical Uplink Control Channel (PUCCH).

As one embodiment, the second wireless signal includes a Physical Sidelink Control Channel (PSCCH).

As one embodiment, the second wireless signal includes a Physical Sidelink Shared Channel (psch).

As an embodiment, the second wireless signal includes a Physical Sidelink Feedback Channel (PSFCH).

As one embodiment, the second wireless signal includes a Physical Sidelink Broadcast Channel (PSBCH).

For one embodiment, the second wireless signal is transmitted to a plurality of receiving nodes.

As one embodiment, the second wireless signal carries multicast data.

As one embodiment, the second wireless signal carries broadcast data.

As one embodiment, the second wireless signal is used to transmit a multicast transmission logical channel.

As one embodiment, the second wireless signal is used to transmit a broadcast transmission logical channel.

For one embodiment, the air interface between the second node U2 and the first node U1 includes a PC5 interface.

For one embodiment, the air interface between the second node U2 and the first node U1 includes a sidelink.

For one embodiment, the air interface between the second node U2 and the first node U1 includes a Uu interface.

For one embodiment, the air interface between the second node U2 and the first node U1 includes a cellular link.

For one embodiment, the air interface between the second node U2 and the first node U1 comprises a wireless interface between user equipment and user equipment.

For one embodiment, the air interface between the second node U2 and the first node U1 comprises a wireless interface between a base station device and a user equipment.

As an embodiment, the first node in this application is a terminal.

As an example, the first node in the present application is an automobile.

As an example, the first node in the present application is a vehicle.

As an example, the first node in this application is an RSU (Road Side Unit).

As an embodiment, the first node in this application is a base station.

As an embodiment, the second node in this application is a terminal.

As an example, the second node in the present application is an automobile.

As an example, the second node in this application is a vehicle.

As an embodiment, the second node in this application is an RSU.

As an embodiment, the second node in this application is a base station.

Example 6

Embodiment 6 illustrates a schematic diagram of time domain resources occupied by a first wireless signal group according to the present application, as shown in fig. 6. In fig. 6, the blocks represent the time domain resources occupied by a wireless signal. In fig. 6, the first wireless signal group includes a plurality of wireless signals, to which K wireless signals belong in the present application, which may be numbered with K integers of T1, T2, T3 … …, TK. Any wireless signal in the first set of wireless signals is associated with one candidate index in a first set of candidate indices in the present application.

As an embodiment, the number of candidate indexes included in any two candidate index groups of the Q candidate index groups is the same.

As one embodiment, any two candidate indexes in the Q candidate index groups are different.

As an embodiment, the candidate indexes in the Q candidate index groups are sequentially 0, 1, 2,.. multidot.q 2-1; the Q2 is the total number of candidate indices included in the Q candidate index groups.

As one example, the Q2 is 64.

As one example, the Q is related to the Q2.

As an embodiment, the candidate indexes in the first candidate index group are sequentially 0, 1, ·, Q1-1; the Q1 is a number of candidate indices included in the first set of candidate indices, the Q1 is greater than or equal to the K.

As one example, Q1 is a positive integer power of 2.

As an embodiment, the candidate indexes in the first candidate index group are sequentially 0+ Q1 ×, 1+ Q1 ×, a., Q1-1+ Q1 ×; q1 is the number of candidate indexes included in a candidate index group, and Q is the index of the first candidate index group.

As an embodiment, the indexes of the Q candidate index groups are sequentially 0, 1.

As an embodiment, any one of the K indices is a physical index.

As one embodiment, any one of the K indices is a logical index.

As an embodiment, any one of the K indices is associated with a set of physical resources used for transmitting wireless signals.

As an embodiment, any one of the K indices is associated with one multi-antenna transmission parameter.

As an embodiment, any one of the K indices is associated with one multi-antenna reception parameter.

As an embodiment, any one of the Q candidate index sets is associated with a set of physical resources for transmitting wireless signals.

As an embodiment, any one of the Q candidate index sets is associated with one multi-antenna transmission parameter.

As an embodiment, any one of the Q candidate index sets is associated with one multi-antenna reception parameter.

As one embodiment, the K indices implicitly indicate the first set of candidate indices.

As an embodiment, the K indices are used to determine a group index, which is associated to the first candidate index group.

As one embodiment, the Q candidate index groups are respectively associated to Q group indexes.

Example 7

Embodiment 7 is a schematic diagram illustrating a relationship between time domain resources respectively occupied by a plurality of wireless signal groups and a plurality of candidate channels according to an embodiment of the present application, as shown in fig. 7. In fig. 7, the wireless signal group i and the wireless signal group j each include a plurality of wireless signals. The wireless signal group i and the wireless signal group j are respectively associated with one candidate index group of the Q candidate index groups. The candidate channel m and the candidate channel n are each one of the Q candidate channels. In this embodiment, the wireless signal group i is associated with the candidate channel m, and the wireless signal group j is associated with the candidate channel n.

As an embodiment, any of the Q candidate channels comprises one PRACH opportunity (PRACH opportunity) comprising time, frequency and code domain resources for transmission of one random access preamble.

As one embodiment, any of the Q candidate channels comprises a plurality of PRACH opportunities comprising time, frequency and code domain resources for transmission of one random access preamble.

As an embodiment, the first random access channel is one of the Q candidate channels, and the first random access channel includes K PRACH opportunities that are respectively associated with the K wireless signals.

As a sub-embodiment of the above embodiment, the first wireless signal is used to select a PRACH opportunity from the K PRACH opportunities for transmission of the first random access signal.

As an embodiment, any one of the Q candidate channels occupies a positive integer number of multicarrier symbols in the time domain.

As an embodiment, any one of the Q candidate channels occupies a positive integer number of REs (Resource elements) in a frequency domain.

As an embodiment, any one of the Q candidate channels occupies a positive integer number of RBs (Resource Block) in a frequency domain.

As an embodiment, any one of the Q candidate channels occupies a positive integer number of sequences in the code domain.

As an embodiment, any one of the Q candidate channels is associated with one of the Q candidate index sets.

As an embodiment, any one of the Q candidate channels is associated with multiple ones of the Q candidate index sets.

As an embodiment, the candidate index sets associated with any two of the Q candidate channels are different.

As an embodiment, the candidate index groups associated with any two candidate channels in the Q candidate channels are the same.

Example 8

Embodiment 8 illustrates a schematic diagram of time domain resources occupied by the second channel sensing operation and K wireless signals respectively according to an embodiment of the present application, as shown in fig. 8. In fig. 8, the second node performs a second channel sensing operation, and the K wireless signals are transmitted in response to the second channel sensing operation.

As one embodiment, the second channel sensing operation is LBT (Listen Before Talk).

As an embodiment, the second channel sensing operation is Cat 4LBT (Category 4LBT, type 4 LBT).

As an embodiment, the second channel sensing operation is Cat 2LBT (Category 2LBT, type 2 LBT).

For one embodiment, the second channel sensing operation includes energy detection.

For one embodiment, the second channel sensing operation includes a plurality of energy detections.

For one embodiment, the second channel sensing operation comprises sequence coherent detection.

For one embodiment, the second channel sensing operation comprises CRC detection.

As one embodiment, the second channel sensing operation is used to determine whether a channel is idle, the channel comprising a positive integer number of RBs.

As one embodiment, the second receiver performs the second channel sensing operation using a plurality of multi-antenna reception parameters.

As one embodiment, the second receiver performs the second channel sensing operation using one multi-antenna reception parameter.

As an embodiment, one multi-antenna reception parameter resulting from the second channel sensing operation as channel idle is used to determine multi-antenna transmission parameters for the K wireless signals.

As an embodiment, a plurality of multi-antenna reception parameters resulting from the second channel sensing operation that are channel idle are used to determine multi-antenna transmission parameters for the K wireless signals.

As an embodiment, the multi-antenna transmission parameters of the K wireless signals and the one multi-antenna reception parameter resulting from the second channel sensing operation as channel idle are spatially correlated.

As an embodiment, the multi-antenna transmit beams of the K wireless signals are included within a range of one multi-antenna receive beam for which a channel is idle as a result of the second channel sensing operation.

As one embodiment, prior to transmitting any of the K wireless signals, the second receiver performs a third channel sensing operation, which is used to determine whether any of the K wireless signals is transmitted.

As an embodiment, the third channel sensing operation and the second channel sensing operation are of the same type.

As one embodiment, the third channel sensing operation and the second channel sensing operation are of different types.

As one embodiment, the third channel sensing operation is LBT (Listen Before Talk).

As an example, the third channel sensing operation is Cat 2LBT (Category 2LBT, type 2 LBT).

As an example, the third channel sensing operation is Cat 4LBT (Category 4LBT, type 4 LBT).

As one embodiment, the third channel sensing operation includes energy detection.

As one embodiment, the third channel sensing operation includes a plurality of energy detections.

As one embodiment, the third channel sensing operation includes sequence coherent detection.

For one embodiment, the third channel sensing operation comprises CRC detection.

As an embodiment, the third channel sensing operation is used to determine whether a channel is idle, the channel comprising a positive integer number of RBs.

As one embodiment, the second receiver performs the third channel sensing operation using a plurality of multi-antenna reception parameters.

As one embodiment, the second receiver performs the third channel sensing operation using one multi-antenna reception parameter.

As an embodiment, for any one of the K wireless signals, which are respectively transmitted in K time units, K multiple antenna transmission parameters are respectively used for transmission in the K time units; the K multi-antenna transmission parameters are indicated by the K indices, respectively.

As an embodiment, any two multi-antenna transmission parameters of the K multi-antenna transmission parameters are different.

As an embodiment, two of the K multi-antenna transmission parameters are the same.

As an embodiment, the K multiple-antenna transmission parameters are determined by multiple-antenna reception parameters of the second channel sensing operation.

As an embodiment, the beam directions associated with the K multiple antenna transmission parameters can be received simultaneously by the second node.

As an embodiment, the beam directions associated with the K multi-antenna transmission parameters cannot be received simultaneously by the second node.

Example 9

Embodiment 9 illustrates a schematic diagram of time domain resources occupied by the first channel sensing operation, the first channel access signal and the second channel access signal according to an embodiment of the present application. In fig. 9, a first channel sensing operation is performed before the first random access signal is transmitted; wherein the first random access signal is transmitted in response to the first channel sensing operation. The second random access signal is transmitted after the first random access signal; wherein the second random access signal indicates an index included in the first wireless signal.

As one embodiment, the first random access signal is a random access procedure message 1(msg 1).

For one embodiment, the first random access signal is a random access procedure message a (msga).

As an embodiment, the first random access signal is used for a 4-step random access procedure (4-step RACH).

As an embodiment, the first random access signal is used for a 2-Step random access procedure (2Step RACH).

In one embodiment, the first random access signal is transmitted through a PRACH channel.

For one embodiment, the first random access signal includes a random access preamble.

As an example, the second random access signal is random access procedure message 3(msg 3).

As an embodiment, the second random access signal is a random access procedure message b (msgb).

As an embodiment, the second random access signal is used for a 4-step random access procedure (4-step RACH).

As an embodiment, the second random access signal is used for a 2-Step random access procedure (2Step RACH).

As an embodiment, the second random access signal is transmitted over a PUSCH.

As an embodiment, the second random access signal comprises a user temporary identity.

As an embodiment, the second random access signal is transmitted after the first random access signal.

As an embodiment, the first channel-aware operation is LBT (Listen Before Talk).

As an embodiment, the first channel sensing operation is Cat 4LBT (Category 4LBT, type 4 LBT).

As one embodiment, the first channel sensing operation includes energy detection.

As one embodiment, the first channel sensing operation includes a plurality of energy detections.

For one embodiment, the first channel sensing operation comprises sequence coherent detection.

For one embodiment, the first channel sensing operation comprises CRC detection.

As one embodiment, the first channel sensing operation is used to determine whether a channel is idle, the channel comprising a positive integer number of RBs.

As one embodiment, the second receiver performs the first channel sensing operation using a plurality of multi-antenna reception parameters.

As one embodiment, the second receiver performs the first channel sensing operation using one multi-antenna reception parameter.

As an embodiment, the first channel sensing operation comprises a first sub-operation and a second sub-operation; in the first sub-operation, the first assumed wireless signal is perceived, the multi-antenna transmission parameter corresponding to the first wireless signal is used for generating the first assumed wireless signal, and the first sub-operation indicates that the first random access channel is busy; in the second sub-operation, a target assumed wireless signal is perceived, a multi-antenna transmission parameter corresponding to the target wireless signal is used for generating the target assumed wireless signal, and the second sub-operation indicates that the first random access channel is idle.

As an example, the sentence "the first hypothetical wireless signal is perceived, the multi-antenna transmission parameters corresponding to the first wireless signal are used to generate the first hypothetical wireless signal" includes: and the first node executes channel perception by adopting the multi-antenna receiving parameters corresponding to the first wireless signal.

As an embodiment, the sentence "the first hypothetical wireless signal is perceived, the multi-antenna transmission parameters corresponding to the first wireless signal are used to generate the first hypothetical wireless signal" includes: and the multi-antenna receiving parameters adopted by the first node for executing channel sensing are quasi co-located with the multi-antenna receiving parameters corresponding to the first wireless signals.

As an embodiment, the sentence "the target hypothetical wireless signal is perceived, the multi-antenna transmission parameters corresponding to the target wireless signal are used to generate the target hypothetical wireless signal" includes: and the first node adopts the multi-antenna receiving parameters corresponding to the target wireless signal to execute channel sensing.

As an embodiment, the sentence "the target hypothetical wireless signal is perceived, the multi-antenna transmission parameters corresponding to the target wireless signal are used to generate the target hypothetical wireless signal" includes: and the multi-antenna receiving parameters adopted by the first node for executing channel sensing are quasi co-located with the multi-antenna receiving parameters corresponding to the target wireless signals.

As an embodiment, the first channel sensing operation is used to determine whether a first sub-band is free, the first channel sensing operation is used to select the first wireless signal from the K wireless signals, and the frequency domain resources occupied by the first random access signal belong to the first sub-band.

As one embodiment, the second random access signal indicates an index included in the first radio signal from the first candidate index set.

As one embodiment, the second random access signal indicates an index included in the first radio signal from among the Q candidate index groups.

Example 10

Embodiment 10 illustrates a diagram of multi-antenna parameters for channel sensing operations and multi-antenna parameters for wireless signals according to one embodiment of the present application. In fig. 10, the elliptical pattern represents the width of the beam. As an example, the channel sensing operation in fig. 10 includes a first channel sensing operation or a second channel sensing operation, the multiple antenna receiving parameter of the channel sensing operation is a wide beam, the Ki wireless signals and the Kj wireless signals respectively belong to two candidate wireless signal groups, the two candidate wireless signal groups are respectively associated to two candidate index groups in the Q candidate index groups in this application, and Ki and Kj are both positive integers.

As an embodiment, for any one of the K wireless signals, the any one wireless signal is monitored in K time units respectively, and K multiple antenna reception parameters are used for monitoring in the K time units respectively; the K multiple antenna reception parameters are indicated by the K indices, respectively.

As an embodiment, the K wireless signals respectively include MIB.

As one embodiment, the K wireless signals each include an SSB.

As an embodiment, a first block of bits is used for generating the first wireless signal, the first block of bits being transmitted once in the K time units, respectively.

As an embodiment, any two transmissions of the first bit block in the K time units cannot be considered as a QCL.

As one embodiment, the first bit block includes MIB.

As one embodiment, the behavior monitoring includes coherent detection of a signature sequence.

As one embodiment, the behavioral monitoring includes energy detection.

As one embodiment, the behavior monitoring includes CRC detection.

Example 11

Embodiment 11 is a block diagram illustrating a processing apparatus used in a first node, as shown in fig. 11. In embodiment 11, a first node 1100 comprises a first receiver 1101 and a first transmitter 1102.

For one embodiment, the first receiver 1101 includes at least one of the antenna 452, the transmitter/receiver 454, the multi-antenna receive processor 458, the receive processor 456, the controller/processor 459, the memory 460, and the data source 467 of fig. 4 of the present application.

For one embodiment, the first transmitter 1102 includes at least one of the antenna 420, the transmitter/receiver 418, the multi-antenna transmit processor 471, the transmit processor 416, the controller/processor 475, and the memory 476 of fig. 4.

In embodiment 11, the first receiver 1101 monitors K wireless signals, where K is a positive integer greater than 1; the first transmitter 1102 transmits a first random access signal in a first random access channel; the first receiver 1101, receiving first signaling on a first control channel; wherein the K wireless signals are broadcast, the K wireless signals respectively indicate K indexes, and any one of the K indexes is a candidate index in a first candidate index group; the first candidate index group is one of Q candidate index groups, wherein Q is a positive integer greater than 1; the first candidate index set is used to determine the first random access channel from a first candidate channel set, the first candidate channel set comprising Q candidate channels, the first random access channel being one of the Q candidate channels; a first wireless signal is used to determine a multi-antenna parameter of the first signaling, the first wireless signal being one of the K wireless signals, the first wireless signal being self-selected by the first node.

For one embodiment, the first node 1100 is a user equipment.

As an embodiment, the first node 1100 is a relay node.

For one embodiment, the first node 1100 is a base station.

As an example, the first node 1100 is a vehicle communication device.

For one embodiment, the first node 1100 is a user equipment supporting V2X communication.

As an embodiment, the first node 1100 is a relay node supporting V2X communication.

As an embodiment, the first node 1100 is a base station device supporting IAB.

Example 12

Embodiment 12 is a block diagram illustrating a processing apparatus used in a second node, as shown in fig. 12. In embodiment 12, the first node 1200 comprises a second transmitter 1201 and a second receiver 1202.

For one embodiment, second transmitter 1201 includes at least one of antenna 420, transmitter/receiver 418, multi-antenna transmit processor 471, transmit processor 416, controller/processor 475, and memory 476 of fig. 4.

For one embodiment, the second receiver 1202 includes at least one of the antenna 452, the transmitter/receiver 454, the multiple antenna receive processor 458, the receive processor 456, the controller/processor 459, the memory 460, and the data source 467 illustrated in fig. 4 and described herein.

In embodiment 12, the second transmitter 1201 transmits K wireless signals using K multiple-antenna transmission parameters, respectively, where K is a positive integer greater than 1; the second receiver 1202, receiving a first random access signal in a first random access channel; wherein the K wireless signals are broadcast, the K wireless signals respectively indicate K indexes, and any one of the K indexes is a candidate index in a first candidate index group; the first candidate index set is one of Q candidate index sets, Q being a positive integer greater than 1; the first candidate index set is used to determine the first random access channel from a first candidate channel set, the first candidate channel set comprising Q candidate channels, the first random access channel being one of the Q candidate channels; the K multiple-antenna transmission parameters are collectively used to determine multiple-antenna reception parameters for the first random access signal.

As an embodiment, the second node further comprises: the second receiver 1202 receives a second random access signal; wherein the second random access signal indicates an index included in the first wireless signal.

As an embodiment, the second node further comprises: prior to transmitting the K wireless signals, the second receiver 1202 performing a second channel sensing operation; wherein the K wireless signals are transmitted in response to the second channel sensing operation.

As an embodiment, the second node further comprises: the second transmitter 1201 transmits second signaling and a second wireless signal; wherein the second signaling comprises scheduling information of the second wireless signal, the second signaling indicating a first index; a first multi-antenna transmission parameter is used for transmission of the second wireless signal, the first index indicating the first multi-antenna transmission parameter.

As an embodiment, the first radio signal is used to indicate a system frame number of a radio frame to which the first radio signal belongs.

For one embodiment, the second node 1200 is a user equipment.

As an embodiment, the second node 1200 is a relay node.

For one embodiment, the second node 1200 is a base station.

As an example, the second node 1200 is a vehicle communication device.

As an embodiment, the second node 1200 is a user equipment supporting V2X communication.

As an embodiment, the second node 1200 is a relay node supporting V2X communication.

As an embodiment, the second node 1200 is a base station device supporting IAB.

As an embodiment, the sentence "the K multiple-antenna transmission parameters are collectively used for determining the multiple-antenna reception parameters of the first random access signal" includes that the multiple-antenna reception parameters of the first random access signal can receive a signal transmitted using any one of the K multiple-antenna transmission parameters.

As an embodiment, the sentence "the K multiple-antenna transmission parameters are collectively used for determining the multiple-antenna reception parameters of the first random access signal" includes that any one of the K multiple-antenna transmission parameters is used for determining the multiple-antenna reception parameters of the first random access signal.

As an embodiment, the sentence "the K multiple-antenna transmission parameters are commonly used for determining the multiple-antenna reception parameters of the first random access signal" includes that the transmission beam corresponding to any one of the K multiple-antenna transmission parameters can be received by the reception beam corresponding to the multiple-antenna reception parameter of the first random access signal.

It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may be implemented by using one or more integrated circuits. Accordingly, the module units in the foregoing embodiments may be implemented in the form of hardware, or may be implemented in the form of software functional modules, and the present application is not limited to any specific combination of software and hardware. The first node in this application includes but not limited to wireless communication devices such as cell-phone, panel computer, notebook, network card, low-power consumption equipment, eMTC equipment, NB-IoT equipment, vehicle communication equipment, aircraft, unmanned aerial vehicle, telecontrolled aircraft. The second node in this application includes but not limited to cell-phone, panel computer, notebook, network card, low-power consumption equipment, eMTC equipment, NB-IoT equipment, vehicle communication equipment, aircraft, unmanned aerial vehicle, wireless communication equipment such as telecontrolled aircraft. User equipment or UE or terminal in this application include but not limited to cell-phone, panel computer, notebook, network card, low-power consumption equipment, eMTC equipment, NB-IoT equipment, vehicle communication equipment, aircraft, unmanned aerial vehicle, wireless communication equipment such as remote control aircraft. The base station device, the base station or the network side device in the present application includes, but is not limited to, a macro cell base station, a micro cell base station, a home base station, a relay base station, an eNB, a gNB, a transmission and reception node TRP, a GNSS, a relay satellite, a satellite base station, an air base station, and other wireless communication devices.

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

Claims

1. A first node configured for wireless communication, comprising:

the first receiver receives first signaling on a first control channel;

wherein the K wireless signals are broadcast, the K wireless signals respectively indicate K indexes, and any one of the K indexes is a candidate index in a first candidate index group; the first candidate index set is one of Q candidate index sets, Q being a positive integer greater than 1; the first candidate index set is used to determine the first random access channel from a first candidate channel set, the first candidate channel set comprising Q candidate channels, the first random access channel being one of the Q candidate channels; a first wireless signal is used to determine a multi-antenna parameter of the first signaling, the first wireless signal being one of the K wireless signals, the first wireless signal being self-selected by the first node; any one of the K wireless signals includes a synchronization broadcast signal block, or a primary synchronization signal, or a secondary synchronization signal, or a physical broadcast channel, or a demodulation reference signal.

2. The first node of claim 1, comprising:

the first transmitter transmits a second random access signal;

wherein the second random access signal indicates an index included in the first wireless signal.

3. The first node according to claim 1 or 2, comprising:

the first receiver, before transmitting the first random access signal, performs a first channel sensing operation;

wherein the first random access signal is transmitted in response to the first channel sensing operation.

4. The first node according to any of claims 1 to 3, wherein for any of the K radio signals, which are monitored in K time units respectively, K multiple antenna reception parameters are used for monitoring in the K time units respectively; the K multiple antenna reception parameters are indicated by the K indices, respectively.

5. The first node according to any of claims 1 to 4, comprising:

the first receiver receives a second signaling and a second wireless signal;

wherein the second signaling comprises scheduling information of the second wireless signal, the second signaling indicating a first index; a first multi-antenna transmission parameter is used for transmission of the second wireless signal, the first index indicating the first multi-antenna transmission parameter.

6. The first node according to any of claims 1-5, wherein the first radio signal is used to indicate a system frame number of a radio frame to which the first radio signal belongs.

7. The first node of any of claims 1-6, wherein the K indices implicitly indicate the first set of candidate indices.

8. A second node configured for wireless communication, comprising:

wherein the K wireless signals are broadcast, the K wireless signals respectively indicate K indexes, and any index in the K indexes is a candidate index in a first candidate index group; the first candidate index set is one of Q candidate index sets, Q being a positive integer greater than 1; the first candidate index set is used to determine the first random access channel from a first candidate channel set, the first candidate channel set comprising Q candidate channels, the first random access channel being one of the Q candidate channels; the K multiple-antenna transmission parameters are collectively used to determine multiple-antenna reception parameters of the first random access signal; any one of the K wireless signals includes a synchronization broadcast signal block, or a primary synchronization signal, or a secondary synchronization signal, or a physical broadcast channel, or a demodulation reference signal.

9. The second node of claim 8, wherein the second receiver receives a second random access signal; wherein the second random access signal indicates an index included in a first wireless signal, the first wireless signal being one of the K wireless signals.

10. The second node according to claim 8 or 9, further comprising: prior to transmitting the K wireless signals, the second receiver performing a second channel sensing operation; wherein the K wireless signals are transmitted in response to the second channel sensing operation.

11. The second node according to any of claims 8 to 10, wherein for any of the K radio signals, which are transmitted in K time units, respectively, K multiple antenna transmission parameters are used for transmission in the K time units, respectively; the K multi-antenna transmission parameters are indicated by the K indices, respectively.

12. The second node according to any of claims 8-11, characterized in that the second node further comprises: the second transmitter transmits a second signaling and a second wireless signal; wherein the second signaling comprises scheduling information of the second wireless signal, the second signaling indicating a first index; a first multi-antenna transmission parameter is used for transmission of the second wireless signal, the first index indicating the first multi-antenna transmission parameter.

13. The second node of claim 9, wherein the first wireless signal is used to indicate a system frame number of a radio frame to which the first wireless signal belongs.

14. The second node according to any of claims 8 to 13, wherein said K indices implicitly indicate said first set of candidate indices.

15. A method of a first node used for wireless communication, comprising:

monitoring K wireless signals, wherein K is a positive integer greater than 1;

transmitting a first random access signal in a first random access channel;

receiving first signaling on a first control channel;

16. The method of the first node as recited in claim 15, further comprising: transmitting a second random access signal; wherein the second random access signal indicates an index included in the first wireless signal.

17. The method of the first node according to claim 15 or 16, further comprising: performing a first channel sensing operation prior to transmitting the first random access signal; wherein the first random access signal is transmitted in response to the first channel sensing operation.

18. The method of the first node according to any of claims 15 to 17, wherein for any of the K radio signals, which are monitored in K time units respectively, K multiple antenna reception parameters are used for monitoring in the K time units respectively; the K multiple antenna reception parameters are indicated by the K indices, respectively.

19. The method of the first node according to any of claims 15 to 18, further comprising: receiving a second signaling and a second wireless signal; wherein the second signaling comprises scheduling information of the second wireless signal, the second signaling indicating a first index; a first multi-antenna transmission parameter is used for transmission of the second wireless signal, the first index indicating the first multi-antenna transmission parameter.

20. The method of the first node according to any of claims 15-19, wherein the first radio signal is used to indicate a system frame number of a radio frame to which the first radio signal belongs.

21. The method of the first node according to any of claims 15 to 20, wherein said K indices implicitly indicate said first set of candidate indices.

22. A method of a second node used for wireless communication, comprising:

receiving a first random access signal in a first random access channel;

wherein the K wireless signals are broadcast, the K wireless signals respectively indicate K indexes, and any index in the K indexes is a candidate index in a first candidate index group; the first candidate index group is one of Q candidate index groups, wherein Q is a positive integer greater than 1; the first candidate index set is used to determine the first random access channel from a first candidate channel set, the first candidate channel set comprising Q candidate channels, the first random access channel being one of the Q candidate channels; the K multiple-antenna transmission parameters are collectively used to determine multiple-antenna reception parameters of the first random access signal; any one of the K wireless signals includes a synchronization broadcast signal block, or a primary synchronization signal, or a secondary synchronization signal, or a physical broadcast channel, or a demodulation reference signal.

23. The method of the second node of claim 22, further comprising: receiving a second random access signal; wherein the second random access signal indicates an index included in a first wireless signal, the first wireless signal being one of the K wireless signals.

24. The method of the second node according to claim 22 or 23, further comprising: performing a second channel sensing operation prior to transmitting the K wireless signals; wherein the K wireless signals are transmitted in response to the second channel sensing operation.

25. Method of a second node according to any of the claims 22-24, wherein for any of the K radio signals, which are transmitted in K time units, respectively, K multiple antenna transmission parameters are used for the transmission in the K time units, respectively; the K multi-antenna transmission parameters are indicated by the K indices, respectively.

26. The method of the second node according to any of claims 22 to 25, further comprising: transmitting a second signaling and a second wireless signal; wherein the second signaling comprises scheduling information of the second wireless signal, the second signaling indicating a first index; a first multi-antenna transmission parameter is used for transmission of the second wireless signal, the first index indicating the first multi-antenna transmission parameter.

27. The method of claim 23, wherein the first radio signal is used to indicate a system frame number of a radio frame to which the first radio signal belongs.

28. A method of a second node according to any of claims 22-27, wherein said K indices implicitly indicate said first set of candidate indices.