CN115225236A

CN115225236A - Method and apparatus in a node used for wireless communication

Info

Publication number: CN115225236A
Application number: CN202210644677.3A
Authority: CN
Inventors: 张晓博
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Shanghai Langbo Communication Technology Co Ltd
Priority date: 2020-04-14
Filing date: 2020-04-14
Publication date: 2022-10-21
Also published as: CN113541889B; CN113541889A

Abstract

A method and apparatus in a node used for wireless communication is disclosed. A first node receives a first signaling and a second signaling; performing a first channel sensing operation on the first sub-band; and transmitting the first wireless signal in the first time-frequency resource group of the first sub-band, or abandoning the transmission of the first wireless signal in the first time-frequency resource group of the first sub-band. Wherein the first signaling is used to determine a first set of reference signal resources, the first signaling being non-unicast; the second signaling indicates a second set of reference signal resources; the first set of reference signal resources is used in common with the second set of reference signal resources to determine a type of the first channel-aware operation from a first set of candidate types when the first set of time-frequency resources belongs to a first time window in the time domain. By the method, the type of the channel sensing operation can be determined according to the spatial parameters of the wireless signals, so that the transmission opportunity is increased, and the overhead is reduced.

Description

Method and apparatus in a node used for wireless communication

The application is a divisional application of the following original applications:

application date of the original application: 14/04/2020

- -application number of the original application: 202010289165.0

The invention of the original application is named: 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 air interface technology (NR) or Fifth Generation, 5G) is decided over 72 sessions of 3GPP (3 rd Generation Partner Project) RAN (Radio Access Network), and standardization of NR is started over 3GPP RAN #75 sessions over WI (work item) where NR passes.

One key technology for NR is to support beam-based signal transmission, and its main application scenario is to enhance the coverage 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. Beam measurement and feedback for NR systems operating in the millimeter wave band may be accomplished by a plurality of synchronized 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, and a User Equipment (UE) measures an SSB or CSI-RS sent by a gNB (next generation Node B) and feeds back an SSB index or a CSI-RS resource number to complete beam alignment.

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. The 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, directional LBT (Directional LBT) techniques are preferably employed to avoid interference because beam-based signal transmission has significant directivity.

In the Cat 4LBT (fourth type LBT, category 4LBT, see 3gpp tr36.889) procedure of LTE, a transmitter (base station or user equipment) first performs energy detection in a delay period (Defer Duration), and if the detection result is that the channel is idle, performs backoff (backoff) and performs energy detection in the backoff time. The backoff time is counted in CCA (Clear Channel Assessment) time slot periods, and the number of backoff time slot periods is obtained by the transmitter randomly selecting in a CWS (Contention Window Size). Thus, the duration of Cat 4LBT is uncertain. Cat 2LBT (second type of LBT, category 2LBT, see 3gpp tr36.889) is another type of LBT. The Cat 2LBT determines whether the channel is idle by evaluating the amount of energy over a particular period of time. Thus, the duration of Cat 2LBT is determined. A similar mechanism is employed in NR. The Cat 4LBT is also called Type 1downlink channel access procedure (Type 1downlink channel access procedure) or Type 1uplink channel access procedure (Type 1uplink channel access procedure); the Cat 2LBT is also called a Type 2downlink channel access procedure (Type 2downlink channel access procedure) or a Type 2uplink channel access procedure (Type 2uplink channel access procedure). The specific definition may refer to 3gpp ts37.213, cat 4LBT in this application is also used to indicate a type 1downlink channel access procedure or a type 1uplink channel access procedure, and Cat 2LBT in this application is also used to indicate a type 2downlink channel access procedure or a type 2uplink channel access procedure.

In NR unlicensed spectrum, the gNB or UE needs to use Cat 4LBT when starting a new COT (Channel Occupancy Time). After completing one successful Cat 4LBT, the gNB may determine one COT and inform the UE of the duration of the COT. In the COT acquired by the gNB, the UE may determine whether a channel is idle using Cat 2LBT before transmitting an uplink signal; and the UE may switch the original Cat 4LBT to Cat 2LBT inside the COT to reduce overhead.

Disclosure of Invention

The inventors found through research that the directional LBT technique is beneficial to improve the spectrum reuse efficiency and transmission performance of NR systems operating on unlicensed spectrum. Unlike omni-directional LBT, directional LBT can only be successfully followed by signal transmission in the beam direction where LBT was successful, while signal transmission in the direction where directional LBT was not performed or in the direction where directional LBT was not successful will be limited. Therefore, in the directional LBT scenario, what relationship the UE adopts between the type of LBT and the beam direction of uplink signal transmission is a problem to be solved.

In view of the above, the present application discloses a solution. It should be noted that, although the above description uses the scenario of air interface transmission between the cellular network gNB and the UE as an example, the present application is also applicable to other communication scenarios (e.g., a wireless local area network scenario, a sidelink transmission scenario between the UE and the UE, etc.), and achieves similar technical effects. Furthermore, the adoption of a unified solution for different scenarios (including but not limited to cellular network, wireless local area network, sidelink transmission, etc.) 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 this 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:

receiving a first signaling and a second signaling;

performing a first channel sensing operation on the first sub-band;

transmitting a first wireless signal in a first set of time-frequency resources of the first sub-band, or dropping transmitting a first wireless signal in the first set of time-frequency resources of the first sub-band;

wherein the first signaling is used to determine a first set of reference signal resources, the first signaling being non-unicast; the second signaling indicates a second set of reference signal resources; the first set of reference signal resources is used in combination with the second set of reference signal resources to determine a type of the first channel sensing operation from a first set of candidate types when the first set of time-frequency resources belongs to a first time window in the time domain, the type of the first channel sensing operation being independent of the second set of reference signal resources when the first set of time-frequency resources does not belong to the first time window in the time domain; the first set of candidate types includes a first type and a second type.

According to an aspect of the present application, the method is characterized in that the second signaling indicates the first set of time-frequency resources, and the first wireless signal has a spatial association relationship with the second set of reference signal resources.

As an embodiment, the characteristics of the above method include: the first time window is a duration of a COT determined by a second node in the present application after the second channel sensing operation is successful. The first signaling is sent after the start of COT, the first reference signal resource group is used for determining the successful beam direction of LBT corresponding to the COT, and the second reference signal resource group is used for determining the beam direction of the first wireless signal; the first set of candidate types comprises Cat 2LBT and Cat4 LBT; when a first wireless signal is located in a COT, the type of the first channel sensing operation is related to the beam direction of the first wireless signal and the beam direction of a successful LBT corresponding to the COT; when a first wireless signal is outside the COT, the type of the first channel sensing operation is independent of a beam direction of the first wireless signal.

As an embodiment, the benefits of the above method include: indicating a first reference signal resource group through a non-unicast first signaling, where the first reference signal resource group is used to determine a successful beam direction of LBT corresponding to the COT, and the signaling overhead is relatively small; and the first node determines the type of LBT according to the first reference signal resource group and the second reference signal resource group, so that on one hand, transmission opportunity loss caused by errors in LBT type selection can be avoided, and on the other hand, unsatisfactory LBT types can be prevented from being used in beam directions in which LBT is unsuccessful.

According to one aspect of the present application, the above method is characterized by further comprising:

receiving third signaling prior to receiving the second signaling, the third signaling indicating a third set of reference signal resources;

transmitting fourth signaling, the fourth signaling being used to determine whether the second signaling is correctly received;

wherein the third set of reference signal resources is used to determine spatial parameters of the first wireless signal when a time interval between the first set of time-frequency resources and the fourth signaling is less than a first threshold; the third set of reference signal resources is used for determining spatial parameters of the first wireless signal when a time interval between the first set of time-frequency resources and the fourth signaling is not less than a first threshold and the first set of time-frequency resources belongs to a first time window in a time domain; the second set of reference signal resources is used to determine spatial parameters of the first wireless signal when a time interval between the first set of time-frequency resources and the fourth signaling is not less than a first threshold and the first set of time-frequency resources does not belong to a first time window in the time domain.

As an embodiment, the characteristics of the above method include: the first wireless signal is a periodic signal, the third signaling being used to determine a beam of the periodic signal; the beams of the periodic signal may need to be updated after a period of time due to mobility, etc.; the second signaling is used to update a beam of the periodic signal; the first threshold is a signal processing delay.

As an example, the benefits of the above method include: when the time interval between the first time-frequency resource group and the fourth signaling is greater than the signal processing delay and the first time-frequency resource group is located inside the COT, if a new beam indicated by the second signaling does not have a spatial association relationship with a successful beam direction of the LBT corresponding to the COT, the new beam indicated by the second signaling is not used, and an old beam indicated in the third signaling is still used, which is beneficial to increasing the transmission opportunity of the first node inside the COT.

According to an aspect of the application, the above method is characterized in that the type of the first channel sensing operation is determined to be of a second type when the first set of time-frequency resources belongs to a first time window in the time domain and the first set of reference signal resources has a spatial association with the second set of reference signal resources.

According to one aspect of the present application, the above method is characterized in that, prior to receiving the first signaling, the type of the first channel sensing operation is determined to be a first type; the type of the first channel sensing operation is switched from the first type to the second type when the first set of time-frequency resources belongs to a first time window in a time domain and the first set of reference signal resources has a spatial association with the second set of reference signal resources.

According to one aspect of the application, the method described above is characterized by further comprising: receiving a fifth signaling; wherein the fifth signaling comprises a transmission indication of the first wireless signal; the indication of the transmission of the first wireless signal is used to determine whether the first wireless signal is allowed to be transmitted when the first set of time-frequency resources belongs to a first time window in the time domain and the first set of reference signal resources is not spatially associated with the second set of reference signal resources.

As an example, the benefits of the above method include: when the first set of time-frequency resources is within a COT and a beam direction of the first wireless signal and a beam direction of an LBT success corresponding to the COT do not have a spatial association relationship, the fifth signaling is used to determine whether the first wireless signal is allowed to be transmitted. For example, when the second node may receive a signal in a beam direction of a first wireless signal, the first wireless signal may be allowed to be transmitted; otherwise, the first wireless signal is not allowed to be transmitted. If the first wireless signal is allowed to be transmitted, a Cat 4LBT is required before transmission. By the method, under the condition that the beam direction of the first wireless signal is different from the beam direction of the successful LBT corresponding to the COT, whether the first wireless signal is sent or not can be flexibly controlled, and the scheduling flexibility and the system performance are favorably improved.

According to an aspect of the application, the above method is characterized in that when the first group of time-frequency resources belongs to a first time window in the time domain, the channel access priority of the first wireless signal is used to determine the type of the first channel sensing operation.

The application discloses a method in a second node used for wireless communication, which is characterized by comprising the following steps:

sending a first signaling and a second signaling;

performing a second channel sensing operation on the first sub-band;

performing a first detection operation on a first set of time-frequency resources of the first sub-band, the first detection operation being used to determine whether a first wireless signal is received on the first set of time-frequency resources;

wherein the first signaling is used to determine a first set of reference signal resources, the first signaling being non-unicast; the second signaling indicates a second set of reference signal resources; the second channel sensing operation is used to determine a first time window; a first channel sensing operation is used to determine whether the first wireless signal is transmitted, an executor of the first channel sensing operation being a receiver of the second signaling; the first set of reference signal resources is used in combination with the second set of reference signal resources to determine a type of the first channel sensing operation from a first set of candidate types when the first set of time-frequency resources belongs to a first time window in the time domain, the type of the first channel sensing operation being independent of the second set of reference signal resources when the first set of time-frequency resources does not belong to the first time window in the time domain; the first set of candidate types includes a first type and a second type.

According to one aspect of the application, the method described above is characterized by further comprising:

transmitting third signaling before transmitting the second signaling, the third signaling indicating a third set of reference signal resources;

receiving fourth signaling, the fourth signaling being used to determine whether the second signaling is correctly received;

wherein the third set of reference signal resources is used to determine spatial parameters of the first wireless signal when a time interval between the first set of time-frequency resources and the fourth signaling is less than a first threshold; the third set of reference signal resources is used to determine spatial parameters of the first wireless signal when a time interval between the first set of time-frequency resources and the fourth signaling is not less than a first threshold and the first set of time-frequency resources belongs to a first time window in a time domain; the second set of reference signal resources is used for determining spatial parameters of the first wireless signal when a time interval between the first set of time-frequency resources and the fourth signaling is not less than a first threshold and the first set of time-frequency resources does not belong to a first time window in a time domain.

According to an aspect of the application, the above method is characterized in that the type of the first channel sensing operation is determined to be of a second type when the first set of time-frequency resources belongs to a first time window in a time domain and the first set of reference signal resources has a spatial association with the second set of reference signal resources.

According to one aspect of the present application, the above method is characterized in that, prior to sending the first signaling, the type of the first channel sensing operation is determined to be a first type; the type of the first channel-aware operation is switched from the first type to the second type when the first set of time-frequency resources belongs to a first time window in a time domain and the first set of reference signal resources has a spatial association with the second set of reference signal resources.

According to one aspect of the application, the method described above is characterized by further comprising: sending a fifth signaling; wherein the fifth signaling comprises a transmission indication of the first wireless signal; the indication of the transmission of the first wireless signal is used to determine whether the first wireless signal is allowed to be transmitted when the first set of time-frequency resources belongs to a first time window in the time domain and the first set of reference signal resources is not spatially associated with the second set of reference signal resources.

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

a first receiver which receives the first signaling and the second signaling;

a second receiver performing a first channel sensing operation on the first sub-band;

a first transmitter configured to transmit a first wireless signal in the first set of time-frequency resources of the first sub-band, or to refrain from transmitting the first wireless signal in the first set of time-frequency resources of the first sub-band;

wherein the first signaling is used to determine a first set of reference signal resources, the first signaling being non-unicast; the second signaling indicates a second set of reference signal resources; when the first group of time-frequency resources belongs to a first time window in the time domain, the first group of reference signal resources and the second group of reference signal resources are jointly used for determining the type of the first channel sensing operation from a first candidate type set, and when the first group of time-frequency resources does not belong to the first time window in the time domain, the type of the first channel sensing operation is independent of the second group of reference signal resources; the first set of candidate types includes a first type and a second type.

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

a second transmitter for transmitting the first signaling and the second signaling;

a third receiver performing a second channel sensing operation on the first sub-band;

a fourth receiver to perform a first detection operation on a first set of time-frequency resources of the first sub-band, the first detection operation being used to determine whether a first wireless signal is received on the first set of time-frequency resources;

wherein the first signaling is used to determine a first set of reference signal resources, the first signaling being non-unicast; the second signaling indicates a second set of reference signal resources; the second channel sensing operation is used to determine a first time window; a first channel sensing operation is used to determine whether the first wireless signal is transmitted, an executor of the first channel sensing operation being a receiver of the second signaling; when the first group of time-frequency resources belongs to a first time window in the time domain, the first group of reference signal resources and the second group of reference signal resources are jointly used for determining the type of the first channel sensing operation from a first candidate type set, and when the first group of time-frequency resources does not belong to the first time window in the time domain, the type of the first channel sensing operation is independent of the second group of reference signal resources; the first set of candidate types includes a first type and a second type.

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

within one COT, the UE may determine the LBT type of the uplink transmission according to the first reference signal resource group and the second reference signal resource group. When the beam direction of the first wireless signal and the successful beam direction of LBT corresponding to the COT have an association relationship, the UE may switch the first channel sensing operation from Cat 4LBT to Cat 2LBT, thereby reducing the time overhead of LBT and improving the transmission opportunity;

within a COT, if a new beam indicated for uplink transmission does not have an association relationship with a beam direction of successful LBT corresponding to the COT, the new beam may be deferred until the COT is finished and then enabled, which is beneficial to increase transmission opportunities within the COT;

in the case that the beam direction of the first wireless signal is different from the beam direction of the successful LBT corresponding to the COT, determining whether the first wireless signal can be transmitted after the successful Cat 4LBT through the transmission indication of the first wireless signal is beneficial to improving scheduling flexibility and system performance.

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 for 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 application;

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

fig. 6 is a schematic diagram illustrating time domain resources occupied by a first time window, a first signaling and a second channel sensing operation, respectively, according to an embodiment of the present application;

fig. 7 shows a schematic diagram of time domain resources occupied by a first wireless signal and time domain resources occupied by a first channel sensing operation according to an embodiment of the present application;

fig. 8 shows a schematic diagram of time domain resources occupied by a first wireless signal and time domain resources occupied by a first channel sensing operation according to an embodiment of the present application;

fig. 9 shows a schematic diagram of time resources occupied by the fourth signaling and time resources occupied by the first wireless signal according to an embodiment of the application;

FIG. 10 illustrates a schematic diagram of a first candidate channel sensing operation according to an 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 the blocks does not represent a specific temporal sequence between the various steps. In embodiment 1, a first node in the present application receives a first signaling and a second signaling in step 101, performs a first channel sensing operation on a first sub-band in step 102, and transmits a first wireless signal in a first time-frequency resource group of the first sub-band in step 103, or abandons the transmission of the first wireless signal in the first time-frequency resource group of the first sub-band. In this embodiment, the first signaling is used to determine a first set of reference signal resources, the first signaling being non-unicast; the second signaling indicates a second set of reference signal resources; when the first group of time-frequency resources belongs to a first time window in the time domain, the first group of reference signal resources and the second group of reference signal resources are jointly used for determining the type of the first channel sensing operation from a first candidate type set, and when the first group of time-frequency resources does not belong to the first time window in the time domain, the type of the first channel sensing operation is independent of the second group of reference signal resources; the first set of candidate types includes a first type and a second type.

As an embodiment, the first signaling is dynamic signaling.

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

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

As an embodiment, the first signaling does not include a reference signal.

As an embodiment, the first signaling comprises a reference signal.

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

As an embodiment, the first signaling is user group specific.

As an embodiment, the first signaling is Group Common (Group Common).

As an embodiment, the first signaling comprises all or part of a higher layer signaling.

As an embodiment, the first signaling comprises all or part of one RRC layer signaling.

As an embodiment, the first signaling includes one or more fields (fields) in an RRC IE.

As one embodiment, the first signaling includes one or more fields in one SIB.

As an embodiment, the first signaling comprises all or part of a MAC layer signaling.

As an embodiment, the first signaling includes one or more fields in one MAC CE.

For one embodiment, the first signaling comprises one or more fields in a PHY layer signaling.

As one embodiment, the first signaling is semi-statically configured.

As an embodiment, the first signaling is dynamically configured.

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

As an embodiment, the first signaling is transmitted on an UpLink (UpLink).

As one embodiment, the first signaling is transmitted on a downlink (UpLink).

As an embodiment, the first signaling is transmitted on a Backhaul link (Backhaul).

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

As an embodiment, the first signaling is transmitted over a PC5 interface.

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

As an embodiment, the first signaling is Broadcast (Broadcast) transmitted.

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

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

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

As an embodiment, the first signaling includes UCI (Uplink Control Information).

As an embodiment, the first signaling includes one or more fields in one UCI.

As an embodiment, the first signaling includes one or more fields in a UCI format.

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

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

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

As an embodiment, the first signaling includes one or more fields in a Group Common (Group Common) DCI, the Group Common DCI being defined with reference to 3gpp ts38.212.

As an embodiment, the first signaling includes one or more fields in DCI format2_0, and the DCI format2_0 is defined with reference to 3gpp ts38.212.

As an embodiment, the first signaling is sent on a Physical Uplink Shared Channel (PUSCH).

As an embodiment, the first signaling is sent on a Physical Uplink Control Channel (PUCCH).

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

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

As an embodiment, the first signaling is sent on a Physical downlink Broadcast Channel (PBCH).

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

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

As an embodiment, the first signaling is transmitted in a licensed spectrum.

As an embodiment, the first signaling is transmitted in an unlicensed spectrum.

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 does not include a reference signal.

As an embodiment, the second signaling includes a reference signal.

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

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

As an embodiment, the second signaling is Group Common (Group Common).

As an embodiment, the second signaling comprises all or part of a higher layer signaling.

As an embodiment, the second signaling comprises all or part of one RRC layer signaling.

As an embodiment, the second signaling includes one or more fields (fields) in an RRC IE.

For one embodiment, the second signaling includes one or more fields in a SIB.

As an embodiment, the second signaling comprises all or part of a MAC layer signaling.

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

For one embodiment, the second signaling comprises one or more fields in a PHY layer signaling.

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 transmitted on a SideLink (SideLink).

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

As one embodiment, the second signaling is transmitted on a downlink (UpLink).

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

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

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

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

As an embodiment, the second signaling is Broadcast (Broadcast) transmitted.

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 UCI (Uplink Control Information).

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

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

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

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

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

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

As an embodiment, the second signaling is sent on a Physical downlink Broadcast Channel (PBCH).

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

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

As an embodiment, the second signaling is transmitted in a licensed spectrum.

As an embodiment, the second signaling is transmitted in an unlicensed spectrum.

In one embodiment, the second signaling includes PUSCH resource indication information.

In one embodiment, the second signaling includes PUCCH resource indication information.

As an embodiment, the second signaling includes SRS (Sounding Reference Signal) resource indication information.

As an embodiment, the second signaling includes dynamic scheduling information of PUSCH.

As one embodiment, the second signaling includes semi-persistent scheduling information of PUSCH.

As one embodiment, the second signaling includes Configured Grant (Configured Grant) information of a PUSCH.

As an embodiment, the second signaling comprises a periodicity indication of a PUCCH.

As an embodiment, the second signaling includes a periodic indication of SRS.

As one embodiment, the second signaling indicates the first set of time-frequency resources.

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

As one embodiment, the first wireless signal comprises a wireless signal.

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

As one embodiment, the first wireless signal is transmitted on an UpLink (UpLink).

As one embodiment, the first wireless signal is transmitted on a downlink (UpLink).

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

As an embodiment, the first wireless signal is transmitted over a Uu interface.

As an embodiment, the first wireless signal is transmitted through a PC5 interface.

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

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

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

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

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

As an embodiment, the first wireless signal carries one CBG (Code Block Group).

For one embodiment, the first wireless signal includes control information.

As an embodiment, the first wireless signal includes SCI (Sidelink Control Information).

For one embodiment, the first wireless signal includes one or more fields in a SCI.

For one embodiment, the first wireless signal includes one or more fields in a SCI format.

As an embodiment, the first wireless signal includes UCI (Uplink Control Information).

For one embodiment, the first wireless signal includes one or more fields in a UCI.

As an embodiment, the first wireless signal includes one or more fields in a UCI format.

As an embodiment, the first wireless signal includes DCI (Downlink Control Information).

For one embodiment, the first wireless signal includes one or more fields in one DCI.

For one embodiment, the first wireless signal includes one or more fields in one DCI format.

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

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

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

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

As an embodiment, the first wireless signal includes a Physical downlink Broadcast Channel (PBCH).

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

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

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

As one embodiment, the first wireless signal includes a reference signal.

As one embodiment, the first wireless signal is transmitted in a licensed spectrum.

As one embodiment, the first wireless signal is transmitted in an unlicensed spectrum.

As one embodiment, the first wireless signal includes a reference signal.

For one embodiment, the first wireless signal includes an uplink reference signal.

For one embodiment, the first wireless signal includes a secondary link reference signal.

For one embodiment, the first wireless signal includes a downlink reference signal.

As one embodiment, the first wireless signal includes an SRS.

As one embodiment, the first wireless signal includes an uplink signal configured with a grant (configureddgrant).

For one embodiment, the first wireless signal includes a dynamically scheduled uplink signal.

For one embodiment, the first wireless signal includes a semi-statically scheduled uplink signal.

As one embodiment, the first wireless signal includes a PUSCH configured with a grant (configredgrant).

As one embodiment, the first wireless signal comprises a dynamically scheduled PUSCH.

As one embodiment, the first wireless signal includes a semi-statically scheduled PUSCH.

As one embodiment, the first signaling indicates the first set of reference signal resources.

As an embodiment, the first signaling includes a first information field indicating the first set of reference signal resources.

As an embodiment, a spatial parameter used for transmitting the first signaling is used for determining the first set of reference signal resources.

As an embodiment, a TCI status used for transmitting the first signaling is used to determine the first set of reference signal resources.

As one embodiment, QCL parameters used for transmitting the first signaling are used to determine the first set of reference signal resources.

As an embodiment, the first signaling and the first reference signal resource group have a spatial association relationship.

As an embodiment, the first signaling is transmitted through a PDCCH, and the first reference signal resource group is one or more reference signal resources associated with a TCI status of the PDCCH used to transmit the first signaling.

As an embodiment, the first signaling is transmitted through a PDCCH, and the first reference signal resource group is one or more reference signal resources associated with QCL parameters of a PDCCH used to transmit the first signaling.

For one embodiment, the first set of reference signal resources includes one reference signal resource.

For one embodiment, the first set of reference signal resources includes a plurality of reference signal resources.

As an embodiment, any reference signal resource in the first set of reference signal resources includes a downlink reference signal resource.

As an embodiment, any reference signal resource in the first set of reference signal resources comprises an uplink reference signal resource.

As one embodiment, any one of the first set of reference signal resources comprises a secondary link reference signal resource.

As one embodiment, any one of the Reference Signal resources in the first Reference Signal resource group includes a CSI-RS (Channel State Information-Reference Signal) resource.

As one embodiment, any one of the first set of reference Signal resources includes an SS (Synchronization Signal).

As an embodiment, any one of the first set of reference Signal resources includes a PSS (Primary Synchronization Signal).

As one embodiment, any one of the first set of reference Signal resources comprises SSS (Secondary Synchronization Signal).

For one embodiment, any one of the first set of reference signal resources comprises an SSB (SS/PBCH block).

As an embodiment, any one of the first set of reference signal resources includes an SRS resource.

As an embodiment, any one of the first set of reference signal resources comprises a set of SRS resources (SRS resource set).

As an embodiment, any one of the Reference Signal resources in the first Reference Signal resource group includes a DeModulation-Reference Signal (DM-RS).

As an embodiment, the first set of reference signal resources is used to determine the beam direction in the second channel sensing operation that is determined to be channel idle.

As an embodiment, the first set of reference signal resources is used to determine a set of available spatial parameters within the first time window.

For one embodiment, the first set of reference signal resources is used to determine a set of available spatial parameters for downlink transmission within the first time window.

For one embodiment, the first set of reference signal resources is used to determine a set of available spatial parameters for uplink transmission within the first time window.

As a sub-embodiment of the above-mentioned embodiments, the available spatial parameter includes a spatial association relationship with a reference signal resource.

As a sub-embodiment of the foregoing embodiment, the available spatial parameter set includes at least one spatial parameter, and all spatial parameters of downlink transmission in the first time window belong to the empty spatial parameter set.

As a sub-embodiment of the above embodiment, the set of available spatial parameters includes at least one spatial parameter, and if a second wireless signal is transmitted within the first time window, the spatial parameter of the second wireless signal belongs to the set of empty spatial parameters.

As a sub-embodiment of the above-mentioned embodiment, the second wireless signal includes a downlink signal.

As a sub-embodiment of the above-mentioned embodiment, the second wireless signal includes an uplink signal.

As a sub-embodiment of the above embodiment, the spatial parameter includes a spatial association relationship with a reference signal resource.

For one embodiment, the second set of reference signal resources includes one reference signal resource.

For one embodiment, the second set of reference signal resources includes a plurality of reference signal resources.

As an embodiment, any reference signal resource in the second set of reference signal resources includes a downlink reference signal resource.

As an embodiment, any reference signal resource in the second set of reference signal resources comprises an uplink reference signal resource.

As an embodiment, any one of the second set of reference signal resources comprises a secondary link reference signal resource.

As one embodiment, any one of the second set of Reference Signal resources comprises a CSI-RS (Channel State Information-Reference Signal) resource.

As one embodiment, any one of the second set of reference Signal resources includes an SS (Synchronization Signal).

As an embodiment, any one of the second set of reference Signal resources includes a PSS (Primary Synchronization Signal).

As an embodiment, any reference Signal resource in the second set of reference Signal resources includes SSS (Secondary Synchronization Signal).

For one embodiment, any reference signal resource in the second set of reference signal resources comprises an SSB (SS/PBCH block).

As an embodiment, any reference signal resource in the second set of reference signal resources comprises an SRS resource.

As an embodiment, any one of the second set of reference signal resources comprises a set of SRS resources (SRS resource set).

As an embodiment, any one of the Reference Signal resources in the second set of Reference Signal resources includes a DM-RS (DeModulation-Reference Signal).

As an embodiment, the spatial parameter in this application includes a spatial association relationship with a reference signal resource.

As an embodiment, the spatial parameters in the present application include QCL parameters.

As one embodiment, the Spatial parameter in the present application includes a Spatial relationship (Spatial relationship).

As an embodiment, the spatial parameter in the present application includes a spatial transmit filter.

As an embodiment, the spatial parameter in the present application includes a spatial receiving filter.

For one embodiment, the first wireless signal has a spatial association relationship with the second set of reference signal resources.

For one embodiment, the first wireless signal has a spatial association relationship with any reference signal resource in the second set of reference signal resources.

As an embodiment, the first wireless signal having a spatial association with any reference signal resource in the second set of reference signal resources comprises the first wireless signal having a QCL (Quasi-co-located) association with any reference signal resource in the second set of reference signal resources.

As one embodiment, the first wireless signal having a spatial association with any one of the second set of reference signal resources includes the first wireless signal having a spatial relationship with any one of the second set of reference signal resources, the spatial relationship defined with reference to 3gpp ts38.213.

As an example, one signal and another signal have a spatial relationship, including that the one signal and the another signal may be transmitted using the same spatial filter.

As an example, one signal and another signal have a spatial relationship, including that the one signal and the another signal may be received with the same spatial filter.

As an example, one signal has a spatial relationship with another signal, including that a spatial filter used to receive the one signal may also be used to transmit the other signal.

As an embodiment, the first wireless signal having a spatial association with any reference signal resource in the second set of reference signal resources includes the first wireless signal including a reference signal having a QCL association with any reference signal resource in the second set of reference signal resources.

As an embodiment, the first wireless signal having a spatial association with any reference signal resource in the second set of reference signal resources includes the first wireless signal including a reference signal having a spatial association with any reference signal resource in the second set of reference signal resources.

As an example, the specific definition of QCL is described in section 5.1.5 of 3gpp ts38.214.

As an embodiment, the QCL association of one signal with 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 receive parameters (spatial rxparameters) 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 with another signal refers to: the one signal and the another signal have at least one same QCL parameter (QCLparameter).

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

As one embodiment, the performing a first channel sensing operation on a first subband comprises performing energy detection on the first subband.

As one embodiment, the first channel sensing operation is used to determine whether the first wireless signal is transmitted.

As one embodiment, the first channel sensing operation is used to determine whether the first sub-band is free.

As an embodiment, the first channel sensing operation is used to determine whether the first sub-band is idle, the first wireless signal being transmitted if the first sub-band is idle; the first wireless signal is not transmitted if the first sub-band is not idle.

As an embodiment, the first candidate type set includes at least one of { a first type of LBT (Category 1 LBT), a second type of LBT (Category 2 LBT), a third type of LBT (Category 3 LBT), and a fourth type of LBT (Category 4 LBT) }, where definitions of the Category 1LBT, category 2LBT, category 3LBT, and Category 4LBT refer to 3gpp tr38.889.

As an embodiment, the first candidate Type set includes at least one of a { Type 1uplink channel access procedure (Type 1UL channel access procedure), a Type 2uplink channel access procedure (Type 2 UL channel access procedure), a Type 2A uplink channel access procedure (Type 2AUL channel access procedure), a Type 2B uplink channel access procedure (Type 2B UL channel access procedure), a Type 2C uplink channel access procedure (Type 2C UL channel access procedure) }, and a Type 1uplink channel access procedure, a Type 2A uplink channel access procedure, a Type 2B uplink channel access procedure, and a Type 2C uplink channel access procedure, where the definitions of the Type 2B uplink channel access procedure and the Type 2C uplink channel access procedure refer to 3gpp ts37.213.

As an embodiment, the first candidate Type set includes at least one of a { Type 1downlink channel access procedure (Type 1DL channel access procedure), a Type 2downlink channel access procedure (Type 2 DL channel access procedure), a Type 2A downlink channel access procedure (Type 2ADL channel access procedure), a Type 2B downlink channel access procedure (Type 2B DL channel access procedure), and a Type 2C downlink channel access procedure (Type 2C DL channel access procedure) }, where the Type 1downlink channel access procedure, the Type 2A downlink channel access procedure, the Type 2B downlink channel access procedure, and the Type 2C downlink channel access procedure are defined with reference to 3gpp ts37.213.

As an embodiment, the second type comprises a fixed length of time LBT.

As an embodiment, the first type comprises LBT of a non-fixed length of time.

As one embodiment, the second type includes a second type of LBT (Cat 2 LBT).

As an embodiment, the second type comprises a first type of LBT (Cat 1 LBT).

As an embodiment, the first type comprises a fourth type of LBT (Cat 4 LBT).

As an embodiment, the first time window comprises a continuous period of time resources.

As an embodiment, the first time window comprises a positive integer number of consecutive multicarrier symbols.

As an embodiment, the first time window comprises a positive integer number of consecutive time slots.

As an embodiment, the first time window comprises a positive integer number of consecutive subframes.

As an embodiment, the first time window comprises a positive integer number of consecutive frames.

As an embodiment, the first time window is determined by a second node in the present application.

As an embodiment, the first time window is determined by a second node in the present application after the second channel sensing operation.

As one embodiment, the performing the second channel sensing operation on the first sub-band comprises performing energy detection on the first sub-band.

As an embodiment, the type of the second channel sensing operation includes at least one of { a first type of LBT (Category 1 LBT), a second type of LBT (Category 2 LBT), a third type of LBT (Category 3 LBT), a fourth type of LBT (Category 4 LBT) }.

As an embodiment, the time length of the first time window is related to a channel access priority.

As an embodiment, the first set of time-frequency resources includes a positive integer number of Resource Elements (REs) in a frequency domain.

As an embodiment, the first set of time-frequency resources includes a positive integer number of Resource Blocks (RBs) in a frequency domain.

As an embodiment, the first set of time-frequency resources includes a positive integer number of Resource Block Groups (RBGs) in a frequency domain.

As an embodiment, the first set of time-frequency resources includes a positive integer number of Control Channel Elements (CCEs) in a frequency domain.

As an embodiment, the first set of time-frequency resources comprises a positive integer number of multicarrier symbols in the time domain.

For one embodiment, the first set of time-frequency resources includes a positive integer number of time slots in the time domain.

As one embodiment, the first set of time-frequency resources includes a positive integer number of subframes in a time domain.

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 the 5g nr, LTE (Long-Term Evolution), and LTE-a (Long-Term Evolution Advanced) systems. The 5G NR or LTE network architecture 200 may be referred to as 5GS (5G System)/EPS (Evolved Packet System) 200 some other suitable terminology. The 5GS/EPS 200 may include one or more UE (User Equipment) 201, ng-RAN (next generation radio access network) 202,5gc (5G Core network )/EPC (Evolved Packet Core) 210, hss (Home Subscriber Server), home Subscriber Server)/UDM (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 bs (gnbs) 203 and other gnbs 204. The gNB203 provides user and control plane protocol termination towards the UE201. The gnbs 203 may connect 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/EPC210. Examples of UEs 201 include cellular phones, smart phones, session Initiation Protocol (SIP) phones, laptops, personal Digital Assistants (PDAs), satellite radios, non-terrestrial base station communications, satellite mobile communications, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, drones, aircraft, narrowband internet of things equipment, machine-type communication equipment, land vehicles, automobiles, wearable equipment, 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 via an 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/EPC210. 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/UPF213. 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 gNB203.

As an embodiment, the second node in this application includes the gNB203.

As an embodiment, the second node in this application includes the UE241.

As an embodiment, the first node in this application includes the UE241.

As an embodiment, the second node in this application includes the UE201.

As an embodiment, the second node in this application includes the gNB204.

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

As an embodiment, the UE241 is a UE in the present application.

As an embodiment, the base station apparatus in this application includes the gNB203.

As an embodiment, the base station device in this application includes the gNB204.

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.

As an embodiment, the UE241 supports sidelink transmission.

As an embodiment, the UE241 supports a PC5 interface.

As an embodiment, the gNB203 supports the Uu interface.

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, in-vehicle device or in-vehicle communication module) and the second node (gNB, RSU in UE or V2X, in-vehicle device or in-vehicle 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 PHY301. Layer 2 (L2 layer) 305 is above the PHY301, and is responsible for the link between the first and second nodes and the two UEs through the PHY301. The L2 layer 305 includes a MAC (Medium Access Control) sublayer 302, an RLC (Radio Link Control) sublayer 303, and a PDCP (Packet Data Convergence Protocol) sublayer 304, which terminate at the second 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. A RRC (Radio Resource Control) sublayer 306 in layer 3 (L3 layer) in the Control plane 300 is responsible for obtaining Radio resources (i.e., radio bearers) and configuring the lower 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), and the radio protocol architecture for the first and second nodes in the user plane 350 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 Service diversity. 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.

The radio protocol architecture of fig. 3 applies to the second node in this application as an example.

As an embodiment, the first signaling in this application is generated in the PHY351.

As an embodiment, the first signaling in this application is generated in the MAC352.

As an embodiment, the first signaling in this application is generated in the PHY301.

As an embodiment, the first signaling in this application is generated in the MAC302.

As an embodiment, the first signaling in this application is generated in the RRC306.

As an embodiment, the second signaling in this application is generated in the PHY351.

As an embodiment, the second signaling in this application is generated in the MAC352.

As an embodiment, the second signaling in this application is generated in the PHY301.

As an embodiment, the second signaling in this application is generated in the MAC302.

As an embodiment, the second signaling in this application is generated in the RRC306.

As an embodiment, the first wireless signal in this application is generated in the PHY351.

As an example, the first wireless signal in this application is generated in the MAC352.

As an example, the first wireless signal in this application is generated in the PHY301.

As an example, the first wireless signal in this application is generated in the MAC302.

As an embodiment, the first radio signal in this application is generated in the RRC306.

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 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 a controller/processor 475. The controller/processor 475 implements the functionality of the L2 layer. 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 processing 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 transmit 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 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 received analog precoded/beamformed baseband multicarrier symbol stream 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 functions 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. The data source 467 represents all protocol layers above the L2 layer. Similar to the send 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 that is provided 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 rf signals through its respective antenna 420, converts the received rf signals to baseband signals, and provides the baseband signals 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 functions of the L1 layer. The controller/processor 475 implements L2 layer functions. The controller/processor 475 can 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-mentioned embodiments, the first communication device 410 comprises: 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: receiving a first signaling and a second signaling; performing a first channel sensing operation on the first sub-band; transmitting a first wireless signal in a first set of time-frequency resources of the first sub-band, or dropping transmitting a first wireless signal in the first set of time-frequency resources of the first sub-band; wherein the first signaling is used to determine a first set of reference signal resources, the first signaling being non-unicast; the second signaling indicates a second set of reference signal resources; the first set of reference signal resources is used in combination with the second set of reference signal resources to determine a type of the first channel sensing operation from a first set of candidate types when the first set of time-frequency resources belongs to a first time window in the time domain, the type of the first channel sensing operation being independent of the second set of reference signal resources when the first set of time-frequency resources does not belong to the first time window in the time domain; the first set of candidate types includes a first type and a second type.

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: receiving a first signaling and a second signaling; performing a first channel sensing operation on the first sub-band; transmitting a first wireless signal in a first set of time-frequency resources of the first sub-band, or, forgoing transmitting the first wireless signal in the first set of time-frequency resources of the first sub-band; wherein the first signaling is used to determine a first set of reference signal resources, the first signaling being non-unicast; the second signaling indicates a second set of reference signal resources; when the first group of time-frequency resources belongs to a first time window in the time domain, the first group of reference signal resources and the second group of reference signal resources are jointly used for determining the type of the first channel sensing operation from a first candidate type set, and when the first group of time-frequency resources does not belong to the first time window in the time domain, the type of the first channel sensing operation is independent of the second group of reference signal resources; the first set of candidate types includes a first type and a second type.

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: sending a first signaling and a second signaling; performing a second channel sensing operation on the first sub-band; performing a first detection operation on a first set of time-frequency resources of the first sub-band, the first detection operation being used to determine whether a first wireless signal is received on the first set of time-frequency resources; wherein the first signaling is used to determine a first set of reference signal resources, the first signaling being non-unicast; the second signaling indicates a second set of reference signal resources; the second channel sensing operation is used to determine a first time window; a first channel sensing operation is used to determine whether the first wireless signal is transmitted, the performer of the first channel sensing operation being a recipient of the second signaling; when the first group of time-frequency resources belongs to a first time window in the time domain, the first group of reference signal resources and the second group of reference signal resources are jointly used for determining the type of the first channel sensing operation from a first candidate type set, and when the first group of time-frequency resources does not belong to the first time window in the time domain, the type of the first channel sensing operation is independent of the second group of reference signal resources; the first set of candidate types includes a first type and a second type.

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: sending a first signaling and a second signaling; performing a second channel sensing operation on the first sub-band; performing a first detection operation on a first set of time-frequency resources of the first sub-band, the first detection operation being used to determine whether a first wireless signal is received on the first set of time-frequency resources; wherein the first signaling is used to determine a first set of reference signal resources, the first signaling being non-unicast; the second signaling indicates a second set of reference signal resources; the second channel sensing operation is used to determine a first time window; a first channel sensing operation is used to determine whether the first wireless signal is transmitted, an executor of the first channel sensing operation being a receiver of the second signaling; when the first group of time-frequency resources belongs to a first time window in the time domain, the first group of reference signal resources and the second group of reference signal resources are jointly used for determining the type of the first channel sensing operation from a first candidate type set, and when the first group of time-frequency resources does not belong to the first time window in the time domain, the type of the first channel sensing operation is independent of the second group of reference signal resources; the first set of candidate types includes a first type and a second type.

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 signaling in this application.

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, and the data source 467 is used for receiving the second signaling in this application.

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 wireless 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 to transmit the first signaling in this 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 second signaling 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 first wireless 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, the first node U1 and the second node U2 communicate with each other 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, the third signaling is received in step S11, the second signaling is received in step S12, the fourth signaling is sent in step S13, the first signaling is received in step S14, the fifth signaling is received in step S15, the first channel sensing operation is performed in the first sub-band in step S16, and the first wireless signal is sent in step S17. For the second node U2, a third signaling is sent in step S21, a second signaling is sent in step S22, a fourth signaling is received in step S23, a second channel sensing operation is performed in the first sub-band in step S24, a first signaling is sent in step S25, a fifth signaling is sent in step S26, a first detection operation is performed on the first set of time-frequency resources of the first sub-band in step S27. Here, steps S11 and S21 in the block F51 are optional, steps S13 and S23 in the block F52 are optional, steps S15 and S26 in the block F53 are optional, and step S17 in the block F54 is optional.

In embodiment 5, the first signaling is used to determine a first set of reference signal resources, the first signaling being non-unicast; the second signaling indicates a second set of reference signal resources; the second channel sensing operation is used to determine a first time window; a first channel sensing operation is used to determine whether the first wireless signal is transmitted, an executor of the first channel sensing operation being a receiver of the second signaling; the first set of reference signal resources is used in combination with the second set of reference signal resources to determine a type of the first channel sensing operation from a first set of candidate types when the first set of time-frequency resources belongs to a first time window in the time domain, the type of the first channel sensing operation being independent of the second set of reference signal resources when the first set of time-frequency resources does not belong to the first time window in the time domain; the first set of candidate types includes a first type and a second type. The third signaling indicates a third set of reference signal resources. The fourth signaling is used to determine whether the second signaling is received correctly. The fifth signaling includes a transmission indication of the first wireless signal.

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

As an embodiment, the air interface between the second node U2 and the first node U1 comprises a cellular link.

As an embodiment, the air interface between the second node U2 and the first node U1 comprises a radio interface between user equipment and user equipment.

As an embodiment, the air interface between the second node U2 and the first node U1 comprises a radio interface between a base station device and a user equipment.

Example 6

Embodiment 6 illustrates a schematic diagram of time domain resources occupied by the first time window, the first signaling and the second channel sensing operation, respectively, according to an embodiment of the present application, as shown in fig. 6. In fig. 6, the time domain resource of the first signaling is located within the first time window. The start time of the first time window is after the end of the second channel sensing operation.

As an embodiment, the first time window is a COT.

As an embodiment, the first time window is a COT acquired by a base station.

As an embodiment, the first time window comprises the entire time of one COT.

As an embodiment, the first time window comprises a fraction of time that is one COT.

As an embodiment, the time resource occupied by the first signaling belongs to a first time window.

As an embodiment, the time resource occupied by the first signaling is located before the first time window.

As an embodiment, the first time window includes a period of time that is continuous after a time domain resource occupied by the first signaling.

As an embodiment, the time resource occupied by the first signaling belongs to a COT, and the first time window includes a remaining time of the COT after the time domain resource occupied by the first signaling.

As an embodiment, the first signaling indicates a time length of the first time window.

As an embodiment, the first signaling indicates an end time of the first time window.

As an embodiment, the first signaling indicates frequency domain resources within the COT.

As one embodiment, the performing a second channel sensing operation on the first subband comprises performing energy detection on the first subband.

As one embodiment, the second channel sensing operation is used to determine whether the second node transmits wireless signals in the first sub-band.

As an embodiment, the second channel sensing operation is used to determine whether the first subband is free.

As an embodiment, the second channel sensing operation is used to determine the length of the first time window.

As an embodiment, the second channel sensing operation is used to determine a start time of the first time window.

As one embodiment, the second channel sensing operation is used to determine whether the first sub-band is idle, and if the first sub-band is idle, the second node transmits wireless signals in the first sub-band; the second node abandons transmitting wireless signals in the first sub-band if the first sub-band is not idle.

As an embodiment, the type of the second channel sensing operation is Cat 4LBT.

Example 7

Embodiment 7 illustrates a schematic diagram of time domain resources occupied by a first wireless signal and time domain resources occupied by a first channel sensing operation according to an embodiment of the present application, as shown in fig. 7. In fig. 7, the time domain resources occupied by the first wireless signal are within the first time window, and the first channel sensing operation is performed before the time domain resources occupied by the first wireless signal. Wherein whether the first wireless signal is transmitted is optional. When the first sub-band is idle as a result of the first channel sensing operation, the first wireless signal is transmitted; the first wireless signal is not transmitted when the first sub-band is non-idle as a result of the first channel sensing operation. In fig. 7, the type of the first channel-aware operation is determined to be a second type when the first set of reference signal resources has a spatial association with the second set of reference signal resources; and, if the type of the first channel sensing operation is determined to be a first type prior to receiving the first signaling; the type of the first channel sensing operation is switched from the first type to the second type. In fig. 7, the first set of reference signal resources is used in conjunction with the second set of reference signal resources to determine the type of the first channel-aware operation from a first set of candidate types.

In one embodiment, the second signaling indicates a plurality of groups of time-frequency resources, and the first group of time-frequency resources is one of the plurality of groups of time-frequency resources.

In an embodiment, the second signaling indicates a plurality of time-frequency resource groups occupied by a plurality of signals of the first type, respectively, the first wireless signal is one of the plurality of signals of the first type, and the first time-frequency resource group is one of the plurality of time-frequency resource groups.

As an embodiment, the first type of signal comprises an unlicensed scheduled PUSCH.

As one embodiment, the first type of signal includes a semi-persistent scheduled PUSCH.

As an embodiment, the first type of signal comprises a configured grant (configured grant) PUSCH.

As an embodiment, the first type of signal comprises a periodic PUCCH.

For one embodiment, the first type of signal includes a periodic SRS.

For one embodiment, the first type of signal includes a semi-static SRS.

As an embodiment, the first type of signal comprises a semi-static PUCCH.

As a sub-embodiment of the above-mentioned embodiment, the default channel sensing type of the first type of signal is the first type.

As a sub-embodiment of the above embodiment, the default channel sensing type is a channel sensing type in which the first type of signal is predefined.

As a sub-embodiment of the above-mentioned embodiment, the default channel sensing type is a channel sensing type of the first type of signal indicated by the second signaling.

As an embodiment, the phrase "the type of the first channel sensing operation is determined to be of a first type before receiving the first signaling" includes that a default channel sensing type of the first type of signals is determined to be of a first type before receiving the first signaling.

As an embodiment, the fifth signaling in this application includes a transmission instruction of the first wireless signal; the indication of the transmission of the first wireless signal is used to determine whether the first wireless signal is allowed to be transmitted when the first set of time-frequency resources belongs to a first time window in the time domain and the first set of reference signal resources is not spatially associated with the second set of reference signal resources.

As an embodiment, the fifth signaling is a physical layer signaling.

As an embodiment, the fifth signaling is a higher layer signaling.

As an embodiment, the fifth signaling is an RRC layer signaling.

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

As an embodiment, the fifth signaling is non-unicast.

As an embodiment, the fifth signaling is unicast.

As an embodiment, the fifth signaling is sent through a group common physical layer control channel.

As an embodiment, the fifth signaling is sent through DCI format2_ 0.

As an embodiment, the fifth signaling and the first signaling are sent through the same DCI.

As one embodiment, the channel access priority of the first wireless signal is used to determine the type of the first channel sensing operation when the first set of time-frequency resources belongs to a first time window in the time domain.

As a sub-embodiment of the foregoing embodiment, when the first time-frequency resource group belongs to a first time window in a time domain and the first reference signal resource group is not in a spatial association with the second reference signal resource group, the channel access priority of the first wireless signal is used to determine whether the first wireless signal is allowed to be transmitted.

As a sub-embodiment of the above-mentioned embodiment, the sentence "the channel access priority of the first wireless signal is used for determining whether the first wireless signal is allowed to be transmitted" includes that, when the channel access priority of the first wireless signal belongs to a first priority subset, the first wireless signal is allowed to be transmitted; the first wireless signal is not allowed to be transmitted when the channel access priority of the first wireless signal belongs to a second priority subset.

As a sub-embodiment of the above-described embodiment, the sentence "the channel access priority of the first wireless signal is used to determine whether the first wireless signal is allowed to be transmitted" includes that the first wireless signal is allowed to be transmitted when the channel access priority of the first wireless signal is greater than a first specified priority; when the channel access priority of the first wireless signal is not greater than the first designated priority, the first wireless signal is not allowed to be transmitted.

As a sub-embodiment of the above-described embodiment, the sentence "the channel access priority of the first wireless signal is used to determine whether the first wireless signal is allowed to be transmitted" includes that, when the channel access priority of the first wireless signal is less than a first specified priority, the first wireless signal is allowed to be transmitted; the first wireless signal is not allowed to be transmitted when the channel access priority of the first wireless signal is not less than a first designated priority.

As a sub-embodiment of the foregoing embodiment, the set of channel access priorities includes K1 channel access priorities, K1 is an integer greater than 1, and the first priority subset includes K2 channel access priorities of the K1 channel access priorities; the second priority subset comprises K3 of the K1 channel access priorities that do not belong to the first priority subset; and both K2 and K3 are positive integers smaller than K1.

As a sub-embodiment of the foregoing embodiment, the set of channel access priorities includes K1 channel access priorities, K1 is an integer greater than 1, and the first designated priority is one of the K1 channel access priorities.

As one embodiment, the type of the first channel sensing operation is a first type if the first wireless signal is allowed to be transmitted.

As one embodiment, the type of the first channel sensing operation is Cat 4LBT if the first wireless signal is allowed to be transmitted.

As an embodiment, the first channel sensing operation is not performed if the first wireless signal is not allowed to be transmitted.

Example 8

Embodiment 8 illustrates a schematic diagram of time domain resources occupied by a first wireless signal and time domain resources occupied by a first channel sensing operation according to an embodiment of the present application, as shown in fig. 8. In fig. 8, the time domain resources occupied by the first wireless signal are after the first time window, and the first channel sensing operation is performed before the time domain resources occupied by the first wireless signal. Wherein whether the first wireless signal is transmitted is optional. When the first sub-band is idle as a result of the first channel sensing operation, the first wireless signal is transmitted; the first wireless signal is not transmitted when the first sub-band is non-idle as a result of the first channel sensing operation. In fig. 8, the type of the first channel sensing operation is independent of the second set of reference signal resources.

As an embodiment, when the first set of time-frequency resources does not belong to a first time window in the time domain, the type of the first channel sensing operation is the default channel sensing type.

As an embodiment, the type of the first channel sensing operation is determined by scheduling information of the first wireless signal when the first set of time-frequency resources does not belong to a first time window in a time domain.

Example 9

Embodiment 9 illustrates a schematic diagram of time resources occupied by the fourth signaling and time resources occupied by the first wireless signal according to an embodiment of the present application, as shown in fig. 9. In fig. 9 a, both the time domain resource occupied by the fourth signaling and the time domain resource occupied by the first wireless signal are located within a first time window. In fig. 9_b, the time domain resources occupied by the fourth signaling are located within a first time window, and the time domain resources occupied by the first wireless signal are located after the first time window. In fig. 9_aand 9_b, a time interval between a time resource occupied by the fourth signaling and a time domain resource occupied by the first wireless signal is denoted by T. In fig. 9, when T is less than a first threshold, a third set of reference signal resources is used to determine spatial parameters of the first wireless signal, the third set of reference signal resources being indicated by the third signaling; the third set of reference signal resources is used to determine spatial parameters of the first wireless signal when T is not less than a first threshold and the first set of time-frequency resources belongs to a first time window in the time domain; the second set of reference signal resources is used to determine spatial parameters of the first wireless signal when T is not less than a first threshold and the first set of time-frequency resources does not belong in a first time window in the time domain.

As one embodiment, the spatial parameters of the first wireless signal include QCL parameters of the first wireless signal.

As one embodiment, the spatial parameters of the first wireless signal include a QCL type of the first wireless signal.

As one embodiment, the spatial parameter of the first wireless signal includes a spatial relationship (spatial relationship) of the first wireless signal.

As one embodiment, the spatial parameter of the first wireless signal includes a TCI state of the first wireless signal.

As one embodiment, the spatial parameters of the first wireless signal include a spatial transmit filter of the first wireless signal.

As one embodiment, the spatial parameters of the first wireless signal include a spatial receive filter of the first wireless signal.

As an embodiment, the time interval between the first time-frequency resource group and the fourth signaling includes a time interval between a time slot in which the first time-frequency resource group is located and a time slot in which the fourth signaling is located.

As an embodiment, the time interval between the first time-frequency resource group and the fourth signaling includes the number of time slots between the time slot in which the first time-frequency resource group is located and the time slot in which the fourth signaling is located.

As an embodiment, the time interval between the first set of time-frequency resources and the fourth signaling comprises a number of multicarrier symbols between an end time of a last multicarrier symbol of the first set of time-frequency resources and a start time of a first multicarrier symbol of the fourth signaling.

As an embodiment, the fourth signaling includes HARQ-ACK (hybrid automatic Repeat Request acknowledgement) information of the second signaling.

As an embodiment, the fourth signaling is physical layer signaling.

As an embodiment, the fourth signaling is sent over a PUSCH.

As an embodiment, the fourth signaling is sent through a PUCCH.

As an embodiment, the fourth signaling is sent through a PSFCH.

As an embodiment, the second signaling is carried by a physical layer shared channel, and the fourth signaling includes HARQ-ACK information of the physical layer shared channel carrying the second signaling.

As an embodiment, the second signaling is carried by a PDSCH, and the fourth signaling includes HARQ-ACK information of the PDSCH carrying the second signaling.

As an embodiment, the third signaling is higher layer signaling, and the third signaling is used for indicating a spatial parameter of the first type of signal.

As an embodiment, the third signaling is MAC layer signaling.

As an embodiment, the third signaling is RRC layer signaling.

As an embodiment, the second signaling is higher layer signaling, and the second signaling is used for indicating a spatial parameter of the first type signal.

As an embodiment, the spatial parameters of the first wireless signal and the spatial parameters of the first type of signal are the same.

As an embodiment, the third signaling is sent before the second signaling, and the second signaling is used for updating the spatial parameters of the first type of signals indicated by the third signaling.

As an embodiment, the first threshold comprises a time length of a positive integer number of multicarrier symbols.

For one embodiment, the first threshold comprises a time length of a positive integer number of slots.

As one embodiment, the first threshold comprises a time length of a positive integer number of subframes.

As an embodiment, the first threshold comprises a time length of all subframes within 3 milliseconds.

As an example, the first threshold comprises a time length of all time slots within 3 milliseconds.

As an embodiment, the first threshold comprises a time length of all multicarrier symbols within 3 milliseconds.

Example 10

Embodiment 10 illustrates a schematic diagram of a first candidate channel sensing operation according to an embodiment of the present application, as shown in fig. 10.

In embodiment 10, the first candidate channel sensing operation comprises performing Q2 energy detections in the Q2 time sub-pools on the first sub-band, respectively, resulting in Q2 detected values, Q2 being a positive integer; a wireless signal is transmitted in the first sub-band if and only if Q3 of the Q2 detection values are all below a first perception threshold, and a starting transmission time of the wireless signal is no earlier than an ending time of the first time window, Q3 being a positive integer no greater than Q2. The process of Q2 energy detections can be described by the flow chart in fig. 10.

In fig. 10, the first node or the second node is in an idle state in step S1001, and determines whether transmission is required in step S1002; performing energy detection within one delay period (defer duration) in step 1003; in step S1004, determining whether all sensing slot periods (sensing slot periods) in the delay period are idle, if yes, proceeding to step S1005 to set a first counter equal to Q2; otherwise, returning to the step S1004; in step S1006, determining whether the first counter is 0, if yes, proceeding to step S1007 to transmit a wireless signal on the first subband in the present application; otherwise, go to step S1008 to perform energy detection in an additional sensing slot duration (additional sensing slot duration); judging whether the additional sensing time slot period is idle in the step S1009, if so, proceeding to the step S1010 to reduce the first counter by 1, and then returning to the step 1006; otherwise, the process proceeds to step S1011 to perform energy detection within an additional delay period (additional duration); in step S1012, determining whether all sensing time slot periods within the additional delay period are idle, if yes, proceeding to step S1010; otherwise, the process returns to step S1011.

As an embodiment, any one perceptual slot period within a given time period comprises one of the Q2 time sub-pools; the given time period is any one of { all delay periods, all additional sensing slot periods, all additional delay periods } included in fig. 10.

As an embodiment, performing energy detection within a given time period refers to: performing energy detection in all sensing time slot periods within the given time period; the given time period is any one of { all delay periods, all additional sensing slot periods, all additional delay periods } included in fig. 10.

As an embodiment, the determination as idle by energy detection at a given time period means: all perception time slot periods included in the given period are judged to be idle through energy detection; the given time period is any one of { all delay periods, all additional sensing slot periods, all additional delay periods } included in fig. 10.

As an embodiment, the determination that a given sensing slot period is idle through energy detection means: the first node senses (Sense) the power of all wireless signals in a given time unit on the first sub-band and averages over time, the received power obtained being lower than the first sensing threshold; the given time unit is a duration of time in the given perceptual slot period.

As a sub-embodiment of the above embodiment, the duration of the given time unit is not shorter than 4 microseconds.

As an embodiment, the determination that a given sensing slot period is idle through energy detection means: the first node senses (Sense) the energy of all wireless signals in a given time unit on the first sub-band and averages over time, the received energy obtained being below the first sensing threshold; the given time unit is a duration of time in the given perceptual slot period.

As an embodiment, the determination that a given sensing slot period is idle through energy detection means: the first node carries out energy detection on a time sub-pool included in the given sensing time slot period, and an obtained detection value is lower than the first sensing threshold value; the time sub-pool belongs to the Q2 time sub-pools, and the detection values belong to the Q2 detection values.

As an embodiment, performing energy detection within a given time period refers to: performing energy detection within all of the sub-pools of time within the given time period; the given time period is any one of { all delay periods, all additional sensing slot periods, all additional delay periods } included in fig. 10, and the all time sub-pools belong to the Q2 time sub-pools.

As an embodiment, the determination as idle by energy detection at a given time period means: detecting values obtained by energy detection of all time sub-pools included in the given time period are lower than the first perception threshold; the given time period is any one of { all delay periods, all additional sensing slot periods, all additional delay periods } included in fig. 10, the all time sub-pools belong to the Q2 time sub-pools, and the detection values belong to the Q2 detection values.

As an example, the duration of one delay period (defer duration) is 16 microseconds plus M2, 9 microseconds, where M2 is a positive integer.

As a sub-embodiment of the above embodiment, a delay period comprises M1+1 of the Q2 time sub-pools.

As a sub-embodiment of the above embodiment, the priority corresponding to the first signal in this application is used to determine the M1.

As a reference example of the above sub-embodiment, the Priority is a Channel Access Priority (Channel Access Priority Class), and the definition of the Channel Access Priority is described in 3gpp ts37.213.

As a sub-embodiment of the above embodiment, the M2 belongs to {1,2,3,7}.

As an embodiment, the reception parameters related to multiple antennas used for the Q2 energy detections are the same.

As an embodiment, the Q2 energy detections are used to determine whether the first subband is Idle (Idle).

For one embodiment, the Q2 energy detections are used to determine whether the first sub-band is usable by the first node to transmit wireless signals.

For one embodiment, the Q2 energy detections are used to determine whether the first sub-band is usable by the first node to transmit wireless signals spatially correlated with the Q2 energy detections.

As an embodiment, the Q2 energy detections are energy detections in LBT (Listen Before Talk, etc.), and the specific definition and implementation of LBT are described in 3gpp ts37.213.

As an embodiment, the Q2 energy detections are energy detections in CCA (clear channel assessment), and the specific definition and implementation of CCA are referred to in 3gpp tr36.889.

As an embodiment, any one of the Q2 energy detections is implemented by the method defined in 3gpp ts37.213.

As an embodiment, any one of the Q2 energy detections is implemented by an energy detection manner in WiFi.

As an embodiment, any one of the Q2 energy detections is implemented by measuring RSSI (Received Signal Strength Indication).

As an embodiment, any one of the Q2 energy detections is implemented by an energy detection manner in LTE LAA.

As an example, the Q2 detection values are all in dBm (decibels).

As an example, the Q2 measurements are all in milliwatts (mW).

As an example, the units of the Q2 detection values are joules.

As an embodiment, said Q3 is less than said Q2.

As an embodiment, Q2 is greater than 1.

As an embodiment, the first perceptual threshold has a unit of dBm (millidecibels).

As one embodiment, the first perception threshold is in units of milliwatts (mW).

As one embodiment, the unit of the first perceptual threshold is joules.

As one embodiment, the first perception threshold is equal to or less than-72 dBm.

As an embodiment, the first perception threshold is any value equal to or less than a first given value.

As a sub-embodiment of the above embodiment, the first given value is predefined.

As a sub-embodiment of the above embodiment, the first given value is configured by higher layer signaling, and the first node is a user equipment.

As an embodiment, the first type included in the first candidate type set in the present application includes the first candidate channel sensing operation.

As an embodiment, the second candidate channel sensing operation includes performing Q4 energy detections in a second time window on the first sub-band, respectively, resulting in Q4 detected values, Q4 being a positive integer; the first sub-band is used to transmit wireless signals if and only if all Q5 of the Q4 detection values are below a first perception threshold, Q5 being a positive integer no greater than Q4.

As a sub-embodiment of the above embodiment, the length of the second time window is predefined.

As a sub-embodiment of the above embodiment, the length of the second time window comprises one of {9 microseconds, 16 microseconds, 25 microseconds }.

As an embodiment, the second type included in the first candidate type set in the present application includes the second candidate channel sensing operation.

As an embodiment, the second channel sensing operation in this application is the first candidate channel sensing operation.

Example 11

Embodiment 11 illustrates a block diagram of a processing apparatus used in a first node, as shown in fig. 11. In embodiment 11, a first node 1100 includes a first receiver 1101, a second receiver 1102 and a first transmitter 1103.

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 second receiver 1102 may include 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, for example.

For one embodiment, the first transmitter 1103 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 of the present application.

In embodiment 11, the first receiver 1101 receives a first signaling and a second signaling; the second receiver 1102 performs a first channel sensing operation on a first sub-band; the first transmitter 1103 transmits the first wireless signal in the first set of time-frequency resources of the first sub-band, or abandons transmitting the first wireless signal in the first set of time-frequency resources of the first sub-band; wherein the first signaling is used to determine a first set of reference signal resources, the first signaling being non-unicast; the second signaling indicates a second set of reference signal resources; the first set of reference signal resources is used in combination with the second set of reference signal resources to determine a type of the first channel sensing operation from a first set of candidate types when the first set of time-frequency resources belongs to a first time window in the time domain, the type of the first channel sensing operation being independent of the second set of reference signal resources when the first set of time-frequency resources does not belong to the first time window in the time domain; the first set of candidate types includes a first type and a second type

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 illustrates a block diagram of a processing apparatus used in a first node, as shown in fig. 12. In embodiment 12, the first node 1200 comprises a second transmitter 1201, a third receiver 1202 and a fourth receiver 1203.

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 third receiver 1202 may comprise 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.

For one embodiment, the fourth receiver 1203 includes at least one of an antenna 452, a transmitter/receiver 454, a multi-antenna receive processor 458, a receive processor 456, a controller/processor 459, a memory 460, and a data source 467 of fig. 4, for example.

In embodiment 12, the second transmitter 1201 transmits a first signaling and a second signaling; the third receiver 1202 performing a second channel sensing operation on the first sub-band; the fourth receiver 1203 performs a first detection operation on a first set of time-frequency resources of the first sub-band, the first detection operation being used to determine whether a first wireless signal is received on the first set of time-frequency resources; wherein the first signaling is used to determine a first set of reference signal resources, the first signaling being non-unicast; the second signaling indicates a second set of reference signal resources; the second channel sensing operation is used to determine a first time window; a first channel sensing operation is used to determine whether the first wireless signal is transmitted, an executor of the first channel sensing operation being a receiver of the second signaling; the first set of reference signal resources is used in combination with the second set of reference signal resources to determine a type of the first channel sensing operation from a first set of candidate types when the first set of time-frequency resources belongs to a first time window in the time domain, the type of the first channel sensing operation being independent of the second set of reference signal resources when the first set of time-frequency resources does not belong to the first time window in the time domain; the first set of candidate types includes a first type and a second type.

As an embodiment, the second signaling indicates the first set of time-frequency resources, and the first wireless signal has a spatial association relationship with the second set of reference signal resources.

As an embodiment, further comprising: the second transmitter 1201 also transmits a third signaling before transmitting the second signaling, the third signaling indicating a third set of reference signal resources; the fourth receiver 1203 receives fourth signaling, which is used to determine whether the second signaling is correctly received; wherein the third set of reference signal resources is used to determine spatial parameters of the first wireless signal when a time interval between the first set of time-frequency resources and the fourth signaling is less than a first threshold; the third set of reference signal resources is used for determining spatial parameters of the first wireless signal when a time interval between the first set of time-frequency resources and the fourth signaling is not less than a first threshold and the first set of time-frequency resources belongs to a first time window in a time domain; the second set of reference signal resources is used for determining spatial parameters of the first wireless signal when a time interval between the first set of time-frequency resources and the fourth signaling is not less than a first threshold and the first set of time-frequency resources does not belong to a first time window in a time domain.

As one embodiment, the type of the first channel-aware operation is determined to be of a second type when the first set of time-frequency resources belongs to a first time window in the time domain and the first set of reference signal resources has a spatial association with the second set of reference signal resources.

As an embodiment, before the second transmitter 1201 transmits the first signaling, the type of the first channel sensing operation is determined to be a first type; the type of the first channel-aware operation is switched from the first type to the second type when the first set of time-frequency resources belongs to a first time window in a time domain and the first set of reference signal resources has a spatial association with the second set of reference signal resources.

As an embodiment, further comprising: the second transmitter 1201 transmits a fifth signaling; wherein the fifth signaling comprises a transmission indication of the first wireless signal; the indication of the transmission of the first wireless signal is used to determine whether the first wireless signal is allowed to be transmitted when the first set of time-frequency resources belongs to a first time window in the time domain and the first set of reference signal resources is not spatially associated with the second set of reference signal resources.

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

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

As an 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 apparatus supporting IAB.

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 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. The second 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, remote control plane. 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 telecontrolled 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:

a first receiver receiving a first signaling and a second signaling;

a first transmitter configured to transmit a first wireless signal in a first set of time-frequency resources of the first sub-band, or to refrain from transmitting the first wireless signal in the first set of time-frequency resources of the first sub-band;

wherein the first signaling is used to determine a first set of reference signal resources, the first signaling being non-unicast; the second signaling indicates a second set of reference signal resources; the second set of reference signal resources comprises one or more reference signal resources; any reference signal resource in the second reference signal resource group comprises one of a CSI-RS resource, an SSB or an SRS resource; when the first group of time-frequency resources belongs to a first time window in the time domain, the first group of reference signal resources and the second group of reference signal resources are jointly used for determining the type of the first channel sensing operation from a first candidate type set, and when the first group of time-frequency resources does not belong to the first time window in the time domain, the type of the first channel sensing operation is independent of the second group of reference signal resources; the first set of candidate types comprises a first type and a second type; the first time window is a COT, or the first signaling indicates an end time of the first time window.

2. The first node of claim 1, wherein the second signaling indicates the first set of time-frequency resources, and wherein the first wireless signal has a spatial association with the second set of reference signal resources.

3. The first node of claim 1, comprising:

the first receiver receiving third signaling before receiving the second signaling, the third signaling indicating a third set of reference signal resources;

the first transmitter, which transmits a fourth signaling, the fourth signaling being used to determine whether the second signaling is correctly received;

wherein the third set of reference signal resources is used to determine spatial parameters of the first wireless signal when a time interval between the first set of time-frequency resources and the fourth signaling is less than a first threshold; the third set of reference signal resources is used to determine spatial parameters of the first wireless signal when a time interval between the first set of time-frequency resources and the fourth signaling is not less than a first threshold and the first set of time-frequency resources belongs to a first time window in a time domain; the second set of reference signal resources is used to determine spatial parameters of the first wireless signal when a time interval between the first set of time-frequency resources and the fourth signaling is not less than a first threshold and the first set of time-frequency resources does not belong to a first time window in the time domain.

4. The first node of any of claims 1 to 3, wherein the type of the first channel sensing operation is determined to be of a second type when the first set of time-frequency resources belongs to a first time window in time domain and the first set of reference signal resources has a spatial association with the second set of reference signal resources.

5. The first node of any of claims 1-4, wherein the type of the first channel sensing operation is determined to be a first type before the first receiver receives the first signaling; the type of the first channel sensing operation is switched from the first type to the second type when the first set of time-frequency resources belongs to a first time window in a time domain and the first set of reference signal resources has a spatial association with the second set of reference signal resources.

6. The first node according to any of claims 1-5, further comprising: the first receiver further receives a fifth signaling; wherein the fifth signaling comprises a transmission indication of the first wireless signal; the indication of the transmission of the first wireless signal is used to determine whether the first wireless signal is allowed to be transmitted when the first set of time-frequency resources belongs to a first time window in the time domain and the first set of reference signal resources is not spatially associated with the second set of reference signal resources.

7. The first node of any of claims 1-6, wherein a channel access priority of the first wireless signal is used to determine the type of the first channel sensing operation when the first set of time-frequency resources belongs to a first time window in the time domain.

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

wherein the first signaling is used to determine a first set of reference signal resources, the first signaling being non-unicast; the second signaling indicates a second set of reference signal resources; the second set of reference signal resources comprises one or more reference signal resources; any reference signal resource in the second reference signal resource group comprises one of a CSI-RS resource, an SSB or an SRS resource; the second channel sensing operation is used to determine a first time window; a first channel sensing operation is used to determine whether the first wireless signal is transmitted, the performer of the first channel sensing operation being a recipient of the second signaling; when the first group of time-frequency resources belongs to a first time window in the time domain, the first group of reference signal resources and the second group of reference signal resources are jointly used for determining the type of the first channel sensing operation from a first candidate type set, and when the first group of time-frequency resources does not belong to the first time window in the time domain, the type of the first channel sensing operation is independent of the second group of reference signal resources; the first set of candidate types includes a first type and a second type.

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

receiving a first signaling and a second signaling;

performing a first channel sensing operation on the first sub-band;

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

sending a first signaling and a second signaling;

performing a second channel sensing operation on the first sub-band;

wherein the first signaling is used to determine a first set of reference signal resources, the first signaling being non-unicast; the second signaling indicates a second set of reference signal resources; the second set of reference signal resources comprises one or more reference signal resources; any reference signal resource in the second reference signal resource group comprises one of a CSI-RS resource, an SSB or an SRS resource; the second channel sensing operation is used to determine a first time window; a first channel sensing operation is used to determine whether the first wireless signal is transmitted, an executor of the first channel sensing operation being a receiver of the second signaling; when the first group of time-frequency resources belongs to a first time window in the time domain, the first group of reference signal resources and the second group of reference signal resources are jointly used for determining the type of the first channel sensing operation from a first candidate type set, and when the first group of time-frequency resources does not belong to the first time window in the time domain, the type of the first channel sensing operation is independent of the second group of reference signal resources; the first set of candidate types includes a first type and a second type.