CN113473598A

CN113473598A - Method and apparatus in a node used for wireless communication

Info

Publication number: CN113473598A
Application number: CN202010234068.1A
Authority: CN
Inventors: 张晓博
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Shanghai Langbo Communication Technology Co Ltd
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2021-10-01
Anticipated expiration: 2040-03-30
Also published as: CN113473598B; CN115633403A

Abstract

A method and apparatus in a node used for wireless communication is disclosed. The first node performs a channel sensing operation at the first sub-band; transmitting the first signal in the first sub-band or forgoing transmitting the first signal in the first sub-band. Wherein the channel sensing operation is used to determine whether to transmit the first signal in the first sub-band; the first signal has a spatial association relationship with a first reference signal, the first reference signal belongs to a first reference signal set, and the first reference signal set is used for determining a receiving parameter configuration of the channel sensing operation; a second time window comprises a set of time resources preceding the first time window, and whether there is a transmission of a second signal within the second time window is used to determine the length of the first time window. By the method, the size of the first window can be adjusted more accurately, and the method has smaller overhead.

Description

Method and apparatus in a node used for wireless communication

Technical Field

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

Background

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

One of the key technologies of NR is to support beam-based signal transmission, and its main application scenario is to enhance the coverage performance of NR devices operating in the millimeter wave frequency band (e.g., greater than 6 GHz). In addition, beam-based transmission techniques are also required to support large-scale antennas at low frequency bands (e.g., less than 6 GHz). Through the weighting process of the antenna array, the rf signal forms a stronger beam in a specific spatial direction, and the rf signal is weaker in other directions. After the operations of beam measurement, beam feedback and the like, the beams of the transmitter and the receiver can be accurately aligned to each other, so that signals are transmitted and received with stronger power, and the coverage performance is improved. 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. 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 used to avoid interference due to the significant directivity of beam-based signal transmission.

In the Cat 4LBT (LBT of the fourth type, see 3gpp tr36.889) procedure of LTE, a transmitter (base station or user equipment) performs backoff (backoff) after a certain delay period (deferrduration), the backoff time is counted by taking CCA (clear channel assessment) time slot period as a unit, and the number of backoff time slot periods is obtained by the transmitter randomly selecting in CWS (contention window size). For downlink transmission, the CWS is adjusted according to HARQ (Hybrid Automatic Repeat reQuest) feedback corresponding to data transmission in a previous reference time on the unlicensed spectrum. For uplink transmission, the CWS is adjusted according to whether new data is included in data in a previous reference subframe on the unlicensed spectrum. A similar mechanism is employed in NR. The Cat 4LBT is also called a Type 1downlink channel access procedure (Type 1downlink channel access procedure) or a Type 1uplink channel access procedure (Type 1uplink channel access procedure), and specific definition may refer to 3 gpppts37.213, and Cat 4LBT in this application is also used to refer to a Type 1downlink channel access procedure or a Type 1uplink channel access procedure.

Disclosure of Invention

The inventors have found through research that the directional LBT technique is beneficial to improve the spectrum multiplexing efficiency and transmission performance of NR systems operating on unlicensed spectrum. After a successful directional LBT, the transmission of signals can only be done in the beam direction in which the LBT was successful. The gNB or UE needs to determine the length of the CWS before starting a new cat 4LBT in a particular beam direction. Since both LBT and signal transmission are performed on a beam basis, how to select a reference time for adjusting the CWS and how to select data transmission within the reference time 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 networks, wireless local area networks, sidelink transmissions, 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 the present application are explained with reference to the definitions of the 3GPP specification protocol TS38 series.

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

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

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

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

transmitting a first signal in the first sub-band or forgoing transmission of the first signal in the first sub-band;

wherein the channel sensing operation comprises energy detection within a first time window, the energy detection being used to determine whether to transmit the first signal in the first sub-band; the first signal has a spatial correlation with a first reference signal, the first reference signal belongs to a first reference signal set, and the first reference signal set comprises a plurality of reference signals; the first set of reference signals is used to determine a receive parameter configuration for the channel sensing operation; a second time window comprises a set of time resources preceding the first time window, and whether or not there is a transmission of a second signal within the second time window is used to determine the length of the first time window, the second signal having a spatial association with a second reference signal, the second reference signal belonging to the first set of reference signals.

As an embodiment, the characteristics of the above method include: the channel sensing operation comprises cat 4LBT, the first time window comprises a length of time of an LBT contention window, the first signal is transmitted after LBT success and is not transmitted after LBT failure; the beam direction of the first signal is determined by the first reference signal; when the CWS is adjusted, selecting the transmission of a second signal as a reference, wherein the beam direction of the second signal and the beam direction of the first signal have an incidence relation; and, the second signal is used for CWS adjustment only if there is a transmission of the second signal within the second time window and is not used for CWS adjustment if the transmission of the second signal occurs outside the second time window.

As an example, the benefits of the above method include: when the CWS is adjusted, the beam direction of the signal transmission serving as the adjustment reference and the beam direction of the signal to be transmitted after the LBT is successful have a correlation relationship, so that the interference condition in the beam direction of the signal to be transmitted after the LBT is successful can be truly reflected, and the CWS adjustment is more accurate.

As an embodiment, the benefits of the above method further include: too long a signal transmission may not reflect the current true interference situation due to mobility, etc. When the signal transmission for the CWS adjustment is selected, only the signal transmission in the second time window is selected as a reference, so that the signal transmission too far away from the current time can be avoided, and the CWS can be accurately adjusted.

According to an aspect of the application, the above method is characterized in that the first set of reference signals comprises Q1 reference signal subsets, a first reference signal subset being one of the Q1 reference signal subsets, to which the first reference signal belongs; the first subset of reference signals is used to determine a receive parameter configuration for the channel sensing operation, Q1 being an integer greater than 1; the second reference signal belongs to one of the Q1 reference signal subsets.

According to an aspect of the application, the above method is characterized in that the Q1 reference signal subsets are respectively associated to Q1 spatial parameter sets, a first spatial parameter set being one of the Q1 spatial parameter sets corresponding to the first reference signal subset, the first spatial parameter set being used for determining the reception parameter configuration for the channel sensing operation.

As an embodiment, the characteristics of the above method include: each of the Q1 reference signal subsets corresponds to a data receive beam of one first node, and the Q1 reference signal subsets are respectively associated with data receive beams of Q1 first nodes. When the LBT employs a wide beam or multi-beam, the coverage of the receiving beam of the LBT may include the coverage of the receiving waves of the Q1 first nodes. The second reference signal and the first reference signal may belong to different reference signal subsets, i.e., different wireless signal transmissions associated with reference signals within different reference signal subsets within the same first reference signal set may be referenced to each other for CWS adjustment.

As an example, the benefits of the above method include: the first node uses a wide beam or a multi-beam to carry out LBT, and a plurality of corresponding data receiving beams can share the same CWS adjusting process, so that the complexity and the expense are reduced.

According to an aspect of the application, the above method is characterized in that when there is no transmission of the second signal within the second time window, a first preset value is used for determining the length of the first time window, the first preset value being one of a plurality of alternative integers.

As an embodiment, the characteristics of the above method include: when there is no reference signal transmission for CWS adjustment within the second time window (e.g. when the first node switches to a new beam), the length of the contention window is determined by a first preset value, which may be the minimum of all values to be selected.

As an example, the benefits of the above method include: when the first node selects a new beam and the beam is not used within the second time window, the first time window is reset to the minimum value, which is beneficial to reduce the overhead of LBT.

According to one aspect of the application, the above method is characterized in that, when there is a transmission of the second signal within the second time window, acknowledgement information associated with the second signal is used to determine the length of the first time window, the acknowledgement information associated with the second signal being used to determine whether the second signal was correctly received.

According to one aspect of the present application, the method above is characterized by further comprising transmitting the second signal and receiving a third signal; wherein the third signal is used to determine the acknowledgement information associated with the second signal.

According to one aspect of the present application, the method above is characterized by further comprising, transmitting a third signal, and receiving the second signal; wherein the second signal is used to determine acknowledgement information associated with the third signal, the acknowledgement information associated with the third signal being used to determine whether the third signal was received correctly.

According to one aspect of the present application, the above method is characterized in that the first time window comprises Q2 time sub-pools, the channel sensing operation comprises performing Q2 energy detections in the Q2 time sub-pools on the first sub-band, respectively, resulting in Q2 detection values, Q2 being a positive integer; the first signal is transmitted in the first sub-band if and only if all of the Q3 of the Q2 detection values are below a first threshold, a start transmission time of the first signal is no earlier than an end time of the first time window, and Q3 is a positive integer no greater than the Q2.

According to one aspect of the application, the above method is characterized in that whether there is a transmission of the second signal within the second time window is used to determine Q4 alternative integers, the Q2 is one of the Q4 alternative integers, and Q4 is a positive integer.

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

a first receiver performing a channel sensing operation at a first sub-band;

a first transmitter that transmits a first signal in the first sub-band or that abstains from transmitting the first signal in the first sub-band;

According to one aspect of the present application, the above method is characterized in that the first transmitter further transmits the second signal, and the first receiver further receives a third signal; wherein the third signal is used to determine the acknowledgement information associated with the second signal.

According to one aspect of the present application, the above method is characterized in that the first receiver further receives the second signal and the first transmitter further transmits a third signal; wherein the second signal is used to determine acknowledgement information associated with the third signal, the acknowledgement information associated with the third signal being used to determine whether the third signal was received correctly.

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

the beam direction of the signal transmission serving as a reference for CWS adjustment and the beam direction of the signal to be transmitted after LBT success have a correlation relationship, so that the interference situation in the beam direction of the signal to be transmitted after LBT success can be truly reflected, and CWS adjustment is more accurate.

Selecting a signal transmission that is a reference for CWS adjustment avoids selecting a signal transmission that is too long from the current time, which is beneficial for accurate adjustment of the CWS.

The first node performs LBT using a wide beam or multiple beams, and the LBT receiving beam may correspond to multiple data beams, which may share the same CWS adjustment procedure, thereby reducing complexity and overhead.

When the first node switches to a new beam and the beam is not used within the second time window, the first time window is reset to a minimum value, which is advantageous for reducing the overhead of LBT.

Drawings

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

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

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

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

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

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

FIG. 6 shows a wireless signal transmission flow diagram according to one embodiment of the present application;

fig. 7 shows a schematic diagram of spatial correlations of reference signals within a first set of reference signals and channel sensing operations according to an embodiment of the present application;

FIG. 8 illustrates a schematic diagram of spatial correlations of multiple reference signal subsets and channel sensing operations according to an embodiment of the present application;

FIG. 9 shows a schematic diagram of a first time window, a second time window, a temporal relationship between a first signal and a second signal according to an embodiment of the present application;

FIG. 10 shows a schematic diagram of a first time window, a second time window, a temporal relationship between a first signal and a second signal according to an embodiment of the present application;

FIG. 11 shows a schematic diagram of a process for performing Q2 energy detections in Q2 time sub-pools, respectively, according to an embodiment of the present application;

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

Detailed Description

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

Example 1

Embodiment 1 illustrates a processing flow diagram of a first node according to an embodiment of the present application, as shown in fig. 1. In fig. 1, each block represents a step. In particular, the order of steps in blocks does not represent a particular chronological relationship between the various steps. In embodiment 1, a first node in the present application performs a channel sensing operation in a first sub-band in step 101, transmits a first signal in the first sub-band in step 102, or abandons the transmission of the first signal in the first sub-band. In this embodiment, the channel sensing operation includes performing energy detection within a first time window, the energy detection being used to determine whether to transmit the first signal in the first sub-band; the first signal has a spatial correlation with a first reference signal, the first reference signal belongs to a first reference signal set, and the first reference signal set comprises a plurality of reference signals; the first set of reference signals is used to determine a receive parameter configuration for the channel sensing operation; a second time window comprises a set of time resources preceding the first time window, and whether or not there is a transmission of a second signal within the second time window is used to determine the length of the first time window, the second signal having a spatial association with a second reference signal, the second reference signal belonging to the first set of reference signals.

As an embodiment, the first node is a base station apparatus.

As an embodiment, the first node is a user equipment.

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

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

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

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

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

As one embodiment, the first signal is transmitted on a Backhaul link (Backhaul).

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

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

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

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

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

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

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

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

For one embodiment, the first signal includes control information.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

As an example, the second signal is transmitted on a Backhaul link (Backhaul).

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

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

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

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

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

As an embodiment, the second signal carries one TB.

As an embodiment, the second signal carries one CB.

As an embodiment, the second signal carries a CBG.

For one embodiment, the second signal includes control information.

For one embodiment, the second signal includes SCI.

For one embodiment, the second signal includes one or more fields in one SCI.

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

For one embodiment, the second signal includes UCI.

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

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

As one embodiment, the second signal includes DCI.

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

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

For one embodiment, the second signal includes a physical uplink shared channel.

For one embodiment, the second signal includes a physical uplink control channel.

As an embodiment, the second signal includes a physical downlink shared channel.

As an embodiment, the second signal includes a physical downlink control channel.

For one embodiment, the second signal includes a physical downlink broadcast channel.

For one embodiment, the second signal comprises a physical sidelink control channel.

For one embodiment, the second signal comprises a physical sidelink shared channel.

For one embodiment, the second signal comprises a physical sidelink feedback channel.

For one embodiment, the second signal comprises a physical sidelink broadcast channel.

For one embodiment, the second signal includes a reference signal.

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

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

As an embodiment, any one of the plurality of reference signals comprises a downlink reference signal.

As an embodiment, any one of the plurality of reference signals comprises an uplink reference signal.

As one embodiment, any one of the plurality of reference signals comprises a sidelink reference signal.

As one embodiment, any one of the plurality of Reference signals includes a CSI-RS (Channel State Information-Reference Signal).

As one embodiment, any one of the plurality of reference signals includes SS (Synchronization Signal).

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

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

For one embodiment, any one of the plurality of reference signals comprises an SSB (SS/PBCH block, synchronized broadcast signal block).

As an embodiment, any one of the plurality of Reference signals includes an SRS (Sounding Reference Signal).

As an embodiment, any one of the plurality of reference signals includes an SRS resource.

As an embodiment, any one of the plurality of Reference signals includes a DeModulation-Reference Signal (DM-RS).

As one embodiment, any one of the plurality of reference signals includes a CSI-RS resource.

As an embodiment, any one of the plurality of reference signals includes a CSI-IM (CSI-Interference Measurement) resource.

As one embodiment, any one of the plurality of reference signals includes an SSB resource.

As an embodiment, the first sub-band includes a frequency range occupied by a positive integer number of RBs (Resource Block).

As an embodiment, the first sub-band includes a frequency range occupied by a positive integer number of REs (Resource elements).

As an embodiment, the first sub-band comprises a BWP (bandwidth part).

For one embodiment, the first sub-band includes one carrier component cc (carrier component).

As an embodiment, the first sub-band comprises at least one LBT channel, which is the smallest frequency unit for LBT.

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

For one embodiment, the first time window includes a non-contiguous segment of time resources.

As an embodiment, the first time window comprises a positive integer number of sensing slot periods (sensing slot duration), the definition of which is determined by the specification 3gpp TS 37.213.

As an example, the first time window comprises a positive integer number of delay periods (defer duration), the definition of which is determined by the specification 3gpp TS 37.213.

As an embodiment, the first time window includes Q2 time sub-pools, and the channel sensing operation includes performing Q2 energy detections in the Q2 time sub-pools on the first sub-band, respectively, resulting in Q2 detection values, Q2 being a positive integer.

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

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

For one embodiment, the second time window includes a positive integer number of consecutive time slots.

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

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

As an embodiment, the second time window comprises a time after a last CWS adjustment was made.

As an embodiment, the second time window includes a first time slot after a last CWS adjustment.

As an embodiment, the second time window comprises a first transmission burst (transmissionburst) after a last CWS adjustment.

As an embodiment, the second time window and the first time window are consecutive.

As one embodiment, the second time window and the first time window are discontinuous.

As an embodiment, any two reference signals in the first reference signal set do not have a quasi-co-location relationship therebetween.

As an embodiment, any two reference signals in the first reference signal set have a quasi-co-located relationship.

As an embodiment, any two reference signals in the first set of reference signals have a spatial correlation relationship therebetween.

As one embodiment, the first reference signal and the second reference signal are the same.

As one embodiment, the first reference signal and the second reference signal are different.

For one embodiment, the spatially associating the first signal with the first reference signal includes associating the first signal with the first reference signal by a QCL (Quasi-co-located).

As one embodiment, the first signal having a spatial association with the first reference signal includes the first signal and the first reference signal having a spatial relationship (spatial relationship), the spatial relationship being defined with reference to 3 gpppts38.213.

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 spatial association of the first signal and the first reference signal includes that the first signal and the first reference signal are indicated as having a spatial relationship by one downlink control signaling.

As a sub-embodiment of the foregoing embodiment, the downlink control signaling includes RRC layer signaling.

As a sub-embodiment of the foregoing embodiment, the downlink control signaling includes RRC layer signaling PUCCH-SpatialRelationInfo.

As a sub-embodiment of the foregoing embodiment, the downlink control signaling includes RRC layer signaling spatialrelalationinfo.

As an embodiment, the DMRS (De-modulation Reference Signal) included in the first Signal and the first Reference Signal have a QCL association relationship.

For one embodiment, the spatially correlating the second signal with the second reference signal includes correlating the second signal with the second reference signal by a QCL (Quasi-co-located).

As an embodiment, the DMRS (De-modulation Reference Signal) included in the second Signal and the second Reference Signal have a QCL association relationship.

As one embodiment, the second signal having a spatial relationship with a second reference signal includes the second signal having a spatial relationship with a second reference signal.

As an embodiment, the spatial association between the second signal and the second reference signal includes that the second signal and the second reference signal are indicated as having a spatial relationship by a downlink control signaling.

As an embodiment, the first signal and the first reference signal have the same spatial parameters.

As an embodiment, the second signal has the same spatial parameters as the second reference signal.

As an embodiment, the spatial parameter includes a TCI (Transmission Configuration Indicator) status.

As an embodiment, the spatial parameter includes a spatial relationship (spatial relationship), and the spatial relationship is indicated by a downlink control signaling.

For one embodiment, the TCI status is used to determine QCL parameters.

For one embodiment, the spatial parameters include QCL (Quasi-Colocation) parameters.

As one embodiment, the spatial parameters include transmit beam parameters.

As one embodiment, the spatial parameters include receive beam parameters.

As one embodiment, the spatial parameters include a transmit spatial filter.

As one embodiment, the spatial parameters include a receive spatial filter.

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

As an embodiment, the spatial parameters include a QCL type of QCL-typeD.

For one embodiment, the spatial parameters include a QCL association with a reference signal.

For one embodiment, the spatial parameters include QCL association with CSI-RS resources.

For one embodiment, the spatial parameters include QCL association with SSBs.

As an embodiment, any one of the Q1 spatial parameter sets in the present application includes a positive integer number of spatial parameters.

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

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

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

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

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

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

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

As an embodiment, the QCL type (QCL type) between one reference signal and another reference 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 reference 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 reference signal.

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

As one embodiment, the received parameter configuration for the channel sensing operation includes spatial parameters for the channel sensing operation.

As an embodiment, the receive parameter configuration of the channel sensing operation comprises spatial receive beams of the channel sensing operation.

As one embodiment, the receive parameter configuration of the channel sensing operation includes a spatial receive filter of the channel sensing operation.

As an embodiment, the receiving parameter configuration of the channel sensing operation includes a spatial correlation of the channel sensing operation and a reference signal.

Example 2

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

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

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

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

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

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

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

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

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

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

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

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

As an embodiment, the UE201 supports sidelink transmission.

As an embodiment, the UE201 supports a PC5 interface.

As an embodiment, the UE201 supports the Uu interface.

For one embodiment, the UE241 supports sidelink transmission.

As an embodiment, the UE241 supports a PC5 interface.

As an embodiment, the gNB203 supports the Uu interface.

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

As an embodiment, the gNB204 supports access backhaul integration.

Example 3

Embodiment 3 shows a schematic diagram of an embodiment of a radio protocol architecture for the user plane and the control plane according to the present application, as shown in fig. 3. Fig. 3 is a schematic diagram illustrating an embodiment of radio protocol architecture for the user plane 350 and the control plane 300, fig. 3 showing the radio protocol architecture for the first node (RSU in UE or V2X, car equipment or car communication module) and the second node (gNB, RSU in UE or V2X, car equipment or car communication module) or the control plane 300 between two UEs in three layers: layer 1, layer 2 and layer 3. Layer 1(L1 layer) is the lowest layer and implements various PHY (physical layer) signal processing functions. The L1 layer will be referred to herein as PHY 301. Layer 2(L2 layer) 305 is above the PHY301, and is responsible for the links between the first and second nodes and the two UEs through the PHY 301. The L2 layer 305 includes a MAC (Medium Access Control) sublayer 302, an RLC (Radio Link Control) sublayer 303, and a PDCP (Packet Data Convergence Protocol) sublayer 304, which terminate at the second node. The PDCP sublayer 304 provides data ciphering and integrity protection, and the PDCP sublayer 304 also provides handover support for a second node by a first node. The RLC sublayer 303 provides segmentation and reassembly of packets, retransmission of missing packets by ARQ, and the RLC sublayer 303 also provides duplicate packet detection and protocol error detection. The MAC sublayer 302 provides mapping between logical and transport channels and multiplexing of logical channels. The MAC sublayer 302 is also responsible for allocating the various radio resources (e.g., resource blocks) in one cell between the first nodes. The MAC sublayer 302 is also responsible for HARQ operations. The RRC (Radio Resource Control) sublayer 306 in layer 3 (layer L3) in the Control plane 300 is responsible for obtaining Radio resources (i.e., Radio bearers) and configuring the lower layers using RRC signaling between the second node and the first node. The radio protocol architecture of the user plane 350 includes layer 1(L1 layer) and layer 2(L2 layer), the radio protocol architecture in the user plane 350 for the first and second nodes is substantially the same for the physical layer 351, the PDCP sublayer 354 in the L2 layer 355, the RLC sublayer 353 in the L2 layer 355, and the MAC sublayer 352 in the L2 layer 355 as the corresponding layers and sublayers in the control plane 300, but the PDCP sublayer 354 also provides header compression for upper layer packets to reduce radio transmission overhead. The L2 layer 355 in the user plane 350 further includes an SDAP (Service Data Adaptation Protocol) sublayer 356, and the SDAP sublayer 356 is responsible for mapping between QoS streams and Data Radio Bearers (DRBs) to support diversity of services. Although not shown, the first node may have several upper layers above the L2 layer 355, including a network layer (e.g., IP layer) that terminates at the P-GW on the network side and an application layer that terminates at the other end of the connection (e.g., far end UE, server, etc.).

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

As an embodiment, the first signal in this application is generated in the PHY 351.

As an example, the first signal in this application is generated in the MAC 352.

As an example, the first signal in this application is generated in the PHY 301.

As an example, the first signal in this application is generated in the MAC 302.

As an embodiment, the first signal in this application is generated in the RRC 306.

As an embodiment, the second signal in this application is generated in the PHY 351.

As an example, the second signal in this application is generated in the MAC 352.

As an example, the second signal in this application is generated in the PHY 301.

As an example, the second signal in this application is generated in the MAC 302.

As an embodiment, the second signal in this application is generated in the RRC 306.

As an embodiment, the third signal in this application is generated in the PHY 351.

As an example, the third signal in this application is generated in the MAC 352.

As an example, the third signal in this application is generated in the PHY 301.

As an example, the third signal in this application is generated in the MAC 302.

As an embodiment, the third signal in this application is generated in the RRC 306.

Example 4

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

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

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

In the transmission from the first communication device 410 to the second communication device 450, at the first communication device 410, upper layer data packets from the core network are provided to the controller/processor 475. The controller/processor 475 implements the functionality of layer L2. In transmissions from the first communications device 410 to the first communications device 450, the controller/processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation to the second communications device 450 based on various priority metrics. The controller/processor 475 is also responsible for retransmission of lost packets and signaling to the second communication device 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for the L1 layer (i.e., the physical layer). The transmit processor 416 implements coding and interleaving to facilitate Forward Error Correction (FEC) at the second communication device 450 and mapping of signal constellation based on various modulation schemes (e.g., Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The multi-antenna transmit processor 471 performs digital spatial precoding, including codebook-based precoding and non-codebook based precoding, and beamforming 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 that is provided to a receive processor 456. Receive processor 456 and multi-antenna receive processor 458 implement the various signal processing functions of the L1 layer. A multi-antenna receive processor 458 performs receive analog precoding/beamforming operations on the baseband multi-carrier symbol stream from the receiver 454. Receive processor 456 converts the baseband multicarrier symbol stream after the receive analog precoding/beamforming operation from the time domain to the frequency domain using a Fast Fourier Transform (FFT). In the frequency domain, the physical layer data signals and the reference signals to be used for channel estimation are demultiplexed by the receive processor 456, and the data signals are subjected to multi-antenna detection in the multi-antenna receive processor 458 to recover any spatial streams destined for the second communication device 450. The symbols on each spatial stream are demodulated and recovered at a receive processor 456 and soft decisions are generated. The receive processor 456 then decodes and deinterleaves the soft decisions to recover the upper layer data and control signals transmitted by the first communications device 410 on the physical channel. The upper layer data and control signals are then provided to a controller/processor 459. The controller/processor 459 implements the functionality of the L2 layer. The controller/processor 459 may be associated with a memory 460 that stores program codes and data. Memory 460 may be referred to as a computer-readable medium. In transmissions from the first communications device 410 to the second communications device 450, the controller/processor 459 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover upper layer packets from the core network. The upper layer packet is then provided to all protocol layers above the L2 layer. Various control signals may also be provided to L3 for L3 processing.

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

In a transmission from the second communication device 450 to the first communication device 410, the functionality at the first communication device 410 is similar to the receiving functionality at the second communication device 450 described in the transmission from the first communication device 410 to the second communication device 450. Each receiver 418 receives an rf signal through its respective antenna 420, converts the received rf signal to a baseband signal, and provides the baseband signal to a multi-antenna receive processor 472 and a receive processor 470. The receive processor 470 and the multiple antenna receive processor 472 collectively implement the functionality of the L1 layer. Controller/processor 475 implements the L2 layer functions. The controller/processor 475 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-described embodiment, the first communication device 410 includes: at least one controller/processor; the at least one controller/processor is responsible for HARQ operations.

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

As an embodiment, the second communication device 450 includes: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code are configured for use with the at least one processor. The second communication device 450 apparatus at least: performing a channel sensing operation at the first sub-band; transmitting a first signal in the first sub-band or forgoing transmission of the first signal in the first sub-band; wherein the channel sensing operation comprises energy detection within a first time window, the energy detection being used to determine whether to transmit the first signal in the first sub-band; the first signal has a spatial correlation with a first reference signal, the first reference signal belongs to a first reference signal set, and the first reference signal set comprises a plurality of reference signals; the first set of reference signals is used to determine a receive parameter configuration for the channel sensing operation; a second time window comprises a set of time resources preceding the first time window, and whether or not there is a transmission of a second signal within the second time window is used to determine the length of the first time window, the second signal having a spatial association with a second reference signal, the second reference signal belonging to the first set of reference signals.

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: performing a channel sensing operation at the first sub-band; transmitting a first signal in the first sub-band or forgoing transmission of the first signal in the first sub-band; wherein the channel sensing operation comprises energy detection within a first time window, the energy detection being used to determine whether to transmit the first signal in the first sub-band; the first signal has a spatial correlation with a first reference signal, the first reference signal belongs to a first reference signal set, and the first reference signal set comprises a plurality of reference signals; the first set of reference signals is used to determine a receive parameter configuration for the channel sensing operation; a second time window comprises a set of time resources preceding the first time window, and whether or not there is a transmission of a second signal within the second time window is used to determine the length of the first time window, the second signal having a spatial association with a second reference signal, the second reference signal belonging to the first set of reference signals.

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: performing a channel sensing operation at the first sub-band; transmitting a first signal in the first sub-band or forgoing transmission of the first signal in the first sub-band; wherein the channel sensing operation comprises energy detection within a first time window, the energy detection being used to determine whether to transmit the first signal in the first sub-band; the first signal has a spatial correlation with a first reference signal, the first reference signal belongs to a first reference signal set, and the first reference signal set comprises a plurality of reference signals; the first set of reference signals is used to determine a receive parameter configuration for the channel sensing operation; a second time window comprises a set of time resources preceding the first time window, and whether or not there is a transmission of a second signal within the second time window is used to determine the length of the first time window, the second signal having a spatial association with a second reference signal, the second reference signal belonging to the first set of reference signals.

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: performing a channel sensing operation at the first sub-band; transmitting a first signal in the first sub-band or forgoing transmission of the first signal in the first sub-band; wherein the channel sensing operation comprises energy detection within a first time window, the energy detection being used to determine whether to transmit the first signal in the first sub-band; the first signal has a spatial correlation with a first reference signal, the first reference signal belongs to a first reference signal set, and the first reference signal set comprises a plurality of reference signals; the first set of reference signals is used to determine a receive parameter configuration for the channel sensing operation; a second time window comprises a set of time resources preceding the first time window, and whether or not there is a transmission of a second signal within the second time window is used to determine the length of the first time window, the second signal having a spatial association with a second reference signal, the second reference signal belonging to the first set of reference signals.

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

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

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

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

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

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

Example 5

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

For the first node U1, a second signal is transmitted in step S11; receiving a third signal in step S12; performing a channel sensing operation at the first sub-band in step S13; the first signal is transmitted in step S14. For the second node U2, receiving a second signal in step S21; transmitting a third signal in step S22; the first signal is received in step S23. Wherein, step S11, step S21, step S22 and step S12 contained in the dashed line box F51 are optional; steps S14 and S23 contained within the dashed box F52 are also optional.

In embodiment 5, the channel sensing operation comprises energy detection within a first time window, the energy detection being used to determine whether to transmit the first signal in the first sub-band; the first signal has a spatial correlation with a first reference signal, the first reference signal belongs to a first reference signal set, and the first reference signal set comprises a plurality of reference signals; the first set of reference signals is used to determine a receive parameter configuration for the channel sensing operation; a second time window comprises a set of time resources preceding the first time window, and whether or not there is a transmission of a second signal within the second time window is used to determine the length of the first time window, the second signal having a spatial association with a second reference signal, the second reference signal belonging to the first set of reference signals. The third signal is used to determine the acknowledgement information associated with the second signal.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

As an embodiment, the first node is a base station device, the second signal includes a downlink signal, and the third signal includes uplink control information.

As an embodiment, the first node is a user equipment, the second signal includes an uplink signal, and the third signal includes downlink control information.

As one embodiment, the first node is a user equipment, the second signal includes a sidelink signal, and the third signal includes sidelink control information.

Example 6

Embodiment 6 illustrates a wireless signal transmission flow chart according to an embodiment of the present application, as shown in fig. 6. In FIG. 6, communication between the first node U1 and the second node U2 is over an air interface. In fig. 6, the order of the steps in the blocks does not represent a specific chronological relationship between the individual steps.

For the first node U1, a third signal is transmitted in step S11; receiving a second signal in step S12; performing a channel sensing operation at the first sub-band in step S13; the first signal is transmitted in step S14. For the second node U2, a third signal is received in step S21; transmitting a second signal in step S22; the first signal is received in step S23. Here, step S11, step S21, step S22 and step S12 included in the broken-line frame F61 are optional, and step S14 and step S23 included in the broken-line frame F62 are also optional. .

In embodiment 5, the channel sensing operation comprises energy detection within a first time window, the energy detection being used to determine whether to transmit the first signal in the first sub-band; the first signal has a spatial correlation with a first reference signal, the first reference signal belongs to a first reference signal set, and the first reference signal set comprises a plurality of reference signals; the first set of reference signals is used to determine a receive parameter configuration for the channel sensing operation; a second time window comprises a set of time resources preceding the first time window, and whether or not there is a transmission of a second signal within the second time window is used to determine the length of the first time window, the second signal having a spatial association with a second reference signal, the second reference signal belonging to the first set of reference signals. The second signal is used to determine acknowledgement information associated with the third signal, which is used to determine whether the third signal was received correctly.

As an embodiment, the first node is a base station device, the third signal includes a downlink signal, and the second signal includes uplink control information.

As an embodiment, the first node is a user equipment, the third signal includes an uplink signal, and the second signal includes downlink control information.

As one embodiment, the first node is a user equipment, the third signal includes a sidelink signal, and the third signal includes sidelink control information.

Example 7

Embodiment 7 illustrates a schematic diagram of spatial correlations of reference signals and channel sensing operations within a first set of reference signals according to an embodiment of the present application, as shown in fig. 7. In fig. 7, a first set of reference signals comprising a plurality of reference signals is used to determine a receive parameter configuration for the channel sensing operation. In fig. 7, the receiving parameter configuration of the channel sensing operation includes spatial receiving filters of the channel sensing operation, and the reference signals in the first reference signal set are respectively associated with one spatial parameter.

As an embodiment, any one of the plurality of reference signals included in the first set of reference signals is associated with a spatial parameter, and the spatial parameter includes one of { QCL association with another reference signal, and spatial relationship (spatial relationship) of another reference signal, spatial transmit filter, spatial receive filter }.

As a sub-embodiment of the above embodiment, the spatial transmit filter is used to form a transmit beam.

As a sub-embodiment of the above embodiment, the spatial receive filter is used to form receive beams.

As one embodiment, the plurality of reference signals included in the first set of reference signals includes downlink reference signals and uplink reference signals.

As an embodiment, the plurality of reference signals included in the first set of reference signals includes CSI-RS resources, SSBs, and SRS.

As an embodiment, a receiver of the first reference signal in this application is a first node, and the spatial parameter associated with the first reference signal and the receiving parameter configuration of the channel sensing operation are the same.

As an embodiment, the receiver of the first reference signal in this application is a first node, and the spatial receiving filter of the first reference signal is the same as the spatial receiving filter of the channel sensing operation.

As an embodiment, a receiver of the first reference signal in this application is a first node, and a coverage of a receive beam of the first reference signal is included in a coverage of a receive beam of the channel sensing operation.

As an embodiment, the sender of the first reference signal in this application is a first node, and the spatial transmit filter of the first reference signal is also used as a spatial receive filter for the channel sensing operation.

As an embodiment, a sender of the first reference signal in this application is a first node, and a coverage of a transmission beam of the first reference signal is included in a coverage of a reception beam of the channel sensing operation.

As one embodiment, at least two reference signals in the first set of reference signals have a QCL association relationship therebetween.

As one embodiment, at least two reference signals in the first set of reference signals have a spatial relationship (spatial relationship) therebetween.

Example 8

Embodiment 8 illustrates a schematic diagram of spatial correlations of multiple reference signal subsets and channel sensing operations according to an embodiment of the present application, as shown in fig. 8. In fig. 8, the first reference signal subset and the second reference signal subset are both reference signal subsets of the Q1 reference signal subsets in the present application. The first and second subsets of reference signals are associated with channel aware spatial receive filter #1 and channel aware spatial receive filter #2, respectively. Wherein, the spatial receiving filter #1 for channel sensing operation and the spatial filter #2 for channel sensing operation are respectively determined by two spatial parameter sets of the Q1 spatial parameter sets in the present application.

As one embodiment, any one of the Q1 reference signal subsets includes a plurality of reference signals.

For one embodiment, any one of the Q1 reference signal subsets includes one reference signal.

As an embodiment, any one of the Q1 sets of spatial parameters includes a positive integer number of spatial parameters.

As an embodiment, the second signal belongs to a second subset of reference signals, the second subset of reference signals being different from the first subset of reference signals.

As an embodiment, the second signal belongs to a second subset of reference signals, the second subset of reference signals being the same as the first subset of reference signals.

As an embodiment, any reference signal in the first subset of reference signals and any reference signal in the second subset of reference signals do not have a spatial correlation.

As one embodiment, the second signal belongs to a first subset of reference signals.

As an embodiment, the Q1 sets of spatial parameters may be used simultaneously by the first node.

As an embodiment, the channel sensing operated spatial reception filter #1 and the channel sensing operated spatial reception filter #2 may be used by the first node for the channel sensing operation at the same time.

As an embodiment, the Q1 spatial parameter sets respectively include Q1 spatial filters, and the Q1 spatial filters may be used by the first node at the same time.

As an embodiment, the Q1 sets of spatial parameters respectively include Q1 spatial filters, and the Q1 spatial filters may be used by the first node for reception of channel sensing operations at the same time.

As an embodiment, the Q1 spatial parameter sets respectively include Q1 spatial receiving filters, and the Q1 spatial receiving filters may be used by the first node at the same time.

As an embodiment, the Q1 spatial parameter sets respectively include Q1 spatial receiving filters, and the coverage of the Q1 spatial receiving filters can be covered by one spatial receiving filter for the channel sensing operation.

Example 9

Embodiment 9 illustrates a schematic diagram of a first time window, a second time window, a time relationship between a first signal and a second signal according to an embodiment of the present application, as shown in fig. 9. In fig. 9, a white filled dashed box represents the time domain position of the first signal, wherein the dashed line represents that the transmission of the first signal is optional, i.e. the first signal is transmitted only after the channel sensing operation in the first time window determines that the channel is idle, otherwise the transmission is abandoned. The second time window in fig. 9 precedes the first time window, the second signal and the third signal are also optional, and the second signal precedes the third signal.

As an embodiment, when there is no transmission of the second signal within the second time window, a first preset value is used for determining the length of the first time window, the first preset value being one of a plurality of alternative integers.

As a sub-embodiment of the above embodiment, the plurality of alternative integers is determined by the channel access priority.

As a sub-embodiment of the foregoing embodiment, the first preset value is a smallest alternative integer among the multiple alternative integers.

As a sub-embodiment of the foregoing embodiment, the first preset value is a largest alternative integer among the multiple alternative integers.

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

As a sub-embodiment of the above embodiment, the first preset value is configured semi-statically.

As a sub-embodiment of the above embodiment, the first preset value is indicated by a higher layer signaling.

As a sub-embodiment of the foregoing embodiment, the first preset value is indicated by an RRC layer signaling.

As a sub-embodiment of the above embodiment, the first preset value is dynamically indicated.

As a sub-embodiment of the above-mentioned embodiment, the first preset value is indicated by physical layer signaling.

As a sub-embodiment of the above embodiment, the first preset value is Q4 in this application.

As a sub-embodiment of the above-mentioned embodiment, the first preset value is (Q4-1) in the present application.

As a sub-embodiment of the foregoing embodiment, the first preset value is CWp in this application, that is, the size of the contention window.

As an embodiment, the first preset value being used to determine the length of the first time window comprises the first preset value being used to determine a value of Q2.

As an embodiment, when there is a transmission of the second signal within the second time window, acknowledgement information associated with the second signal is used to determine the length of the first time window, the acknowledgement information associated with the second signal is used to determine whether the second signal was received correctly.

As a sub-implementation of the above-described embodiment, the sentence "acknowledgement information associated with the second signal is used to determine the length of the first time window" includes acknowledgement information associated with the second signal being used to determine a value of Q2.

As a sub-embodiment of the foregoing embodiment, the acknowledgement information associated with the second signal includes HARQ-ACK (Hybrid Automatic Repeat reQuest-acknowledgement) associated with the second signal.

As an embodiment, the first node transmits the second signal and receives a third signal; wherein the third signal is used to determine the acknowledgement information associated with the second signal.

As an embodiment, the time length of the second time window is predefined.

As an embodiment, the first node is a user equipment, and the time length of the second time window is determined by a first signaling sent by a base station device.

As a sub-embodiment of the above embodiment, the first signaling comprises higher layer signaling.

As a sub-embodiment of the above-mentioned embodiments, the first signaling comprises RRC layer signaling.

As a sub-embodiment of the above-mentioned embodiment, the first signaling comprises physical layer signaling.

As a sub-embodiment of the above-mentioned embodiments, the first signaling comprises DCI.

As an embodiment, the time length of the second time window is related to the mobility state of the first node.

As a sub-embodiment of the above-mentioned embodiment, the moving state of the first node includes one of { moving speed, rotation speed, in a stationary state or moving state } of the first node.

As an embodiment, the time length of the second time window is negatively related to the mobility state of the first node, a faster mobility speed corresponds to a shorter second time window, and a slower mobility speed corresponds to a longer second time window.

As an example, the time length of the second time window is negatively related to the rotational state of the first node, a faster rotational speed corresponds to a shorter second time window and a slower rotational speed corresponds to a longer second time window.

As an embodiment, the time length of the second time window is one of a plurality of candidate window lengths, which respectively correspond to a plurality of moving states.

As an embodiment, the first node is a base station device, the second signal is a PDSCH, the third signal is a PUCCH, and the third signal includes HARQ-ACK information associated with the second signal.

As an embodiment, the first node is a user equipment, the second signal is a PUSCH, the third signal is a PDCCH, and the third signal includes HARQ-ACK information associated with the second signal.

As an embodiment, the first node is a user equipment, the second signal is a psch, the third signal is a PSFCH, and the third signal includes HARQ-ACK information associated with the second signal.

Example 10

Embodiment 10 illustrates a schematic diagram of a first time window, a second time window, a time relationship between a first signal and a second signal according to an embodiment of the present application, as shown in fig. 10. In fig. 10, a white filled dashed box represents the time domain position of the first signal, wherein the dashed line represents the transmission of the first signal, which is optional, i.e., the first signal is transmitted only after the channel sensing operation in the first time window determines that the channel is idle, and is otherwise abandoned. The second time window in fig. 10 precedes the first time window, the second signal and the third signal are also optional, and the third signal precedes the second signal.

As an embodiment, the first node transmits a third signal and receives the second signal; wherein the second signal is used to determine acknowledgement information associated with the third signal, the acknowledgement information associated with the third signal being used to determine whether the third signal was received correctly.

As an embodiment, the sentence "the second signal has a spatial relationship with a second reference signal" includes that the second signal is used to determine the confirmation information with which the third signal is associated, and the third signal has a spatial relationship with the second reference signal.

As an embodiment, the sentence "the second signal has a spatial relationship with a second reference signal" includes that the second signal is used to determine the confirmation information associated with the third signal, and the third signal and the second reference signal have a QCL relationship.

As one embodiment, the sentence "the second signal has a spatial relationship with a second reference signal" includes that the second signal is used to determine confirmation information associated with the third signal, and the third signal and the second reference signal have a spatial relationship (spatialization).

As an embodiment, the first node is a base station device, the third signal includes a PDSCH, the second signal includes a PUCCH, and the second signal includes a HARQ-ACK (Hybrid Automatic Repeat reQuest-acknowledgement) associated with the third signal.

As an embodiment, the first node is a base station device, the third signal comprises a PDSCH, the second signal comprises a PUCCH, the second signal comprises a HARQ-ACK associated with the third signal, and the HARQ-ACK is ACK (ACKnowledgement) information indicating that the third signal was correctly received.

As an embodiment, the first node is a base station device, the third signal includes a PDSCH, the second signal includes a PUCCH, the second signal includes HARQ-ACK associated with the third signal, and the HARQ-ACK is NACK (Negative ACKnowledgement) information indicating that the third signal is not correctly received.

As an embodiment, the first node is a user equipment, the third signal comprises a PUSCH, the second signal comprises a PDCCH, and the second signal comprises a HARQ-ACK associated with the third signal.

As an embodiment, the first node is a user equipment, the third signal comprises a PUSCH, the second signal comprises a PDCCH, the second signal comprises HARQ-ACK associated with the third signal, and the HARQ-ACK is ACK information indicating that the third signal was correctly received.

As an embodiment, the first node is a user equipment, the third signal comprises a PUSCH, the second signal comprises a PDCCH, the second signal comprises HARQ-ACK associated with the third signal, and the HARQ-ACK is NACK information indicating that the third signal was not correctly received.

As one embodiment, the first node is a user equipment, the third signal includes a psch, the second signal includes a PSFCH, and the second signal includes HARQ-ACK information associated with the third signal.

As an embodiment, the first node is a user equipment, the third signal includes a PSSCH, the second signal includes a PSFCH, the second signal includes HARQ-ACK information associated with the third signal, and the HARQ-ACK is ACK information indicating that the third signal was correctly received.

As an embodiment, the first node is a user equipment, the third signal includes a psch, the second signal includes a PSFCH, the second signal includes HARQ-ACK information associated with the third signal, and the HARQ-ACK is NACK information indicating that the third signal was not correctly received.

Example 11

Embodiment 11 illustrates a schematic diagram of a process for performing Q2 energy detections in Q2 time sub-pools, respectively, according to an embodiment of the present application; as shown in fig. 11.

In embodiment 11, the first time window comprises Q2 time sub-pools, the channel sensing operation comprises performing Q2 energy detections in the Q2 time sub-pools, respectively, on the first sub-band, resulting in Q2 detection values, Q2 being a positive integer; the first signal is transmitted in the first sub-band if and only if all of the Q3 of the Q2 detection values are below a first threshold, a start transmission time of the first signal is no earlier than an end time of the first time window, and Q3 is a positive integer no greater than the Q2. The process of Q2 energy detections can be described by the flow chart in fig. 11.

In fig. 11, the first 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 (deferment) 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); in step S1009, it is determined whether the additional sensing time slot period is idle, and if so, the process proceeds to step S1010 to decrement the first counter by 1, and then returns to 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 one 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. 11.

As an embodiment, performing energy detection within a given time period refers to: performing energy detection in all sensing 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. 11.

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. 11.

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 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 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 performs energy detection on a time sub-pool included in the given sensing time slot period, and the obtained detection value is lower than the first threshold value; the temporal sub-pool belongs to the Q2 temporal sub-pools, 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. 11, 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: detection values obtained by energy detection of all time sub-pools included in the given time period are lower than the first threshold value; the given time period is any one of { all delay periods, all additional perceptual slot periods, all additional delay periods } included in fig. 11, 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, one delay period comprises M1+1 of the Q2 time sub-pools.

As a reference example of the foregoing sub-embodiments, the duration of the first time sub-pool in the M2+1 time sub-pools is not more than 16 microseconds, and the duration of the other M2 time sub-pools is not more than 9 microseconds.

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 referred to in 3GPP TS 37.213.

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

As one embodiment, one delay period includes a plurality of sensing slot periods.

As a sub-embodiment of the above embodiment, a first sensing slot period and a second sensing slot period in the plurality of sensing slot periods are discontinuous.

As a sub-embodiment of the above embodiment, a time interval between a first sensing slot period and a second sensing slot period of the plurality of sensing slot periods is 7 milliseconds.

As an example, the duration of one additional delay period is 16 microseconds plus M3 9 microseconds, the M3 being a positive integer.

As a sub-embodiment of the above embodiment, one additional delay period comprises M3+1 of the Q2 time sub-pools.

As a reference example of the foregoing sub-embodiments, the duration of the first time sub-pool in the M3+1 time sub-pools is not more than 16 microseconds, and the duration of the other M3 time sub-pools is not more than 9 microseconds.

As a sub-embodiment of the above embodiment, the priority corresponding to the first signal in this application is used to determine the M3.

As a sub-embodiment of the above embodiment, the M3 belongs to {1, 2, 3, 7 }.

As an embodiment, the duration of one delay period is equal to the duration of one additional delay period.

As one embodiment, the M2 is equal to the M3.

As an embodiment, one additional delay period comprises a plurality of sensing slot periods.

As an example, the duration of one sensing slot period is 9 microseconds.

As an embodiment, one sensing slot period includes 1 of the Q2 time sub-pools.

As a sub-embodiment of the above embodiment, the duration of each of the 1 time sub-pools is not more than 9 microseconds.

As an example, the duration of one additional sensing slot period is 9 microseconds.

As an embodiment, one additional sensing slot period comprises 1 of the Q2 time sub-pools.

As an embodiment, the Q2 energy detections respectively use the same receiving parameters related to multiple antennas.

For one embodiment, the Q2 energy checks are used to determine whether the first sub-band is Idle (Idle).

For one embodiment, the Q2 energy detections are used to determine whether the first sub-band can be used 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 tests are energy tests in LBT (Listen Before Talk ), and the specific definition and implementation of LBT are described in 3GPP TS 37.213.

As an embodiment, the Q2 energy detections are energy detections in CCA (clear channel assessment), and the specific definition and implementation of the CCA are referred to in 3gpp tr 36.889.

As an embodiment, any one of the Q2 energy detections is implemented by the method defined in 3GPP TS 37.213.

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

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

As an example, the Q2 test values are all in units of milliwatts (mW).

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

As one embodiment, the Q3 is less than the Q2.

As one example, the Q2 is greater than 1.

As an example, the first threshold value has a unit of dBm (decibels).

As one embodiment, the unit of the first threshold is milliwatts (mW).

As one embodiment, the unit of the first threshold is joule.

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

As an embodiment, the first threshold value is an arbitrary value equal to or smaller 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, said first threshold value is freely chosen by said first node under the condition of being equal to or smaller than a first given value.

As an embodiment, any one of the Q2 time sub-pools is contiguous in occupied time domain resources.

As an example, the Q2 time sub-pools are mutually orthogonal (non-overlapping) two by two in the time domain.

As an example, the duration of any one of the Q2 time sub-pools is one of {16 microseconds, 9 microseconds }.

As an embodiment, there are at least two of the Q2 time sub-pools that are not equal in duration.

As an example, any two of the Q2 time sub-pools may be equal in duration.

As an embodiment, the time domain resources occupied by the Q2 time sub-pools are contiguous.

In an embodiment, at least two of the Q2 time sub-pools occupy time-domain resources that are not contiguous.

As an embodiment, the time domain resources occupied by any two of the Q2 time sub-pools are discontinuous.

As an embodiment, any one of the Q2 time sub-pools is a perceptual slot period.

As an embodiment, any of the Q2 time sub-pools except the earliest one is a perceptual slot period.

As an embodiment, at least one of the Q2 time sub-pools has a duration of 16 microseconds.

As an embodiment, at least one of the Q2 time sub-pools has a duration of 9 microseconds.

As one example, the earliest of the Q2 time sub-pools has a duration of 16 microseconds.

As one example, the latest of the Q2 time sub-pools has a duration of 9 microseconds.

As an example, the Q2 time sub-pools include listen times in Cat4 (fourth type) LBT.

As an embodiment, the Q2 time sub-pools include listening time in Type 1 (first Type) downlink LBT, and the first node is a base station device.

As an embodiment, the Q2 time sub-pools include listening time in Type 1 (first Type) uplink LBT, and the first node is a user equipment.

As one embodiment, the Q2 time sub-pools include M1 sensing slot periods in the delay period in LBT and N1 sensing slot periods after the delay period, where the sum of M1 and N1 is Q2.

As an embodiment, the Q2 time sub-pools include all sensing slot periods after the delay period in LBT and before the end of LBT.

As a sub-embodiment of the above embodiment, the value of Q2 is related to the priority of channel access.

As an embodiment, the Q4 in this application belongs to a second set of alternative integers, which includes a plurality of alternative integers.

As an embodiment, any one of a plurality of alternative integers included in the second set of alternative integers belongs to {4,8,16,32,64,128,256,512,1024 }.

As an embodiment, whether there is a transmission of the second signal within the second time window is used to determine Q4 alternative integers, the Q2 is one of the Q4 alternative integers, and Q4 is a positive integer.

As an embodiment, the first node randomly chooses the value of Q2 among the Q4 alternative integers.

As an embodiment, the probabilities that the first node selects any one of the Q4 alternative integers as the value of Q2 are all equal.

As one example, the Q4 alternative integers are 0,1,2, …, Q4-1.

For an embodiment, the (Q4-1) is equal to CWp, the CWp is the size of a contention window (contention window), and the specific definition of the CWp is described in 3GPP TS 37.213.

As an embodiment, any one of the Q4 alternative integers is a non-negative integer.

As an embodiment, the Q4 alternative integers include 0.

As one embodiment, any two alternative integers of the Q4 alternative integers are not equal.

As an example, Q4 is a positive integer greater than 1.

As an example, the value of Q4 relates to the priority of channel access.

As an embodiment, the first signal is associated with a channel access priority.

As an embodiment, the first signal and the second signal are associated to the same channel access priority.

As an embodiment, the set of channel access priorities includes X1 channel access priorities, X1 is an integer greater than 1, any one of the X1 channel access priorities is associated with a second set of alternative integers, the second set of alternative integers includes a plurality of alternative integers, and one of the second set of alternative integers associated with the channel access priority associated with the first signal is used to determine the Q4.

For one embodiment, the Q4 is equal to the smallest value in the second set of alternative integers when there is no transmission of the second signal within the second time window.

For one embodiment, when there is a transmission of the second signal within the second time window and the acknowledgement information associated with the second signal is ACK, the Q4 is equal to the minimum value in the second set of alternative integers.

For one embodiment, Q4 is equal to the minimum value in the second set of alternative integers when there is a plurality of transmissions of wireless signals associated with the second signal space within the second time window and there is at least one ACK in a plurality of acknowledgements associated with the plurality of transmissions of wireless signals associated with the second signal space.

As an embodiment, when there is transmission of the second signal within the second time window and the acknowledgement information associated with the second signal is NACK, the value of Q4 is updated, and the updated Q4 is equal to the closest alternative integer in the second set of alternative integers and is not less than Q4 before updating.

As an example, when there are multiple transmissions of wireless signals associated with the second signal space within the second time window and there are no ACKs in the plurality of acknowledgement information associated with the multiple transmissions of wireless signals associated with the second signal space, the value of Q4 is updated, the updated Q4 is equal to the one of the second set of alternative integers that is closest to and not less than Q4 before the update.

For one embodiment, when there is transmission of the second signal within the second time window and the acknowledgement information associated with the third signal included in the second signal is ACK, the Q4 is equal to the minimum value in the second set of alternative integers.

For one embodiment, Q4 is equal to the minimum value in the second set of alternative integers when there is a plurality of transmissions of wireless signals associated with the third signal space within the second time window and there is at least one ACK in a plurality of acknowledgements associated with the plurality of transmissions of wireless signals associated with the third signal space.

As an embodiment, when there is transmission of the second signal within the second time window and the acknowledgement information associated with the third signal included in the second signal is NACK, the value of Q4 is updated, and the updated Q4 is equal to the closest alternative integer in the second set of alternative integers and is not less than Q4 before updating.

As an example, when there are multiple transmissions of wireless signals associated with the third signal space within the second time window and there are no ACKs in the plurality of acknowledgement information associated with the multiple transmissions of wireless signals associated with the third signal space, the value of Q4 is updated, the updated Q4 is equal to the one of the second set of alternative integers that is closest to and not less than Q4 before the update.

For one embodiment, at least one of the Q2 detection values not belonging to the Q3 detection values is below the first threshold.

As one embodiment, at least one of the Q2 detection values not belonging to the Q3 detection values is not lower than the first threshold.

As one embodiment, any two of the Q3 time sub-pools are equal in duration.

As an embodiment, there are at least two of the Q3 time sub-pools that are not equal in duration.

As an embodiment, the Q3 time sub-pools include the latest time sub-pool of the Q2 time sub-pools.

As one embodiment, the Q3 time sub-pools include only perceptual slot periods in eCCA.

As a sub-embodiment of the above embodiment, the Q2 time sub-pools comprise the sensing slot period in the initial CCA.

As a sub-embodiment of the above embodiment, the positions of the Q2 time sub-pools in the Q2 time sub-pools are consecutive.

As a sub-embodiment of the foregoing embodiment, at least one of the Q2 time sub-pools has a corresponding detection value lower than the first threshold.

As a sub-embodiment of the foregoing embodiment, at least one of the Q2 time sub-pools has a corresponding detection value not lower than the first threshold.

As a sub-embodiment of the above embodiment, the Q2 time sub-pools include all sensing slot periods within all delay periods.

As a sub-embodiment of the above embodiment, the Q2 time sub-pools include all sensing slot periods within at least one additional delay period.

As a sub-embodiment of the above embodiment, the Q2 time sub-pools include at least one additional sensing slot period.

As a sub-embodiment of the above embodiment, the Q2 time sub-pools include all additional sensing slot periods judged to be non-idle by energy detection in fig. 11 and all sensing slot periods within all additional delay periods.

As an embodiment, the Q3 time sub-pools respectively belong to a Q3 sub-pool set, and any one of the Q3 sub-pool set comprises a positive integer number of the Q2 time sub-pools; and the detection value corresponding to any time sub-pool in the Q3 sub-pool set is lower than the first threshold value.

As a sub-embodiment of the foregoing embodiment, at least one of the Q3 sub-pool sets includes a number of time sub-pools equal to 1.

As a sub-embodiment of the foregoing embodiment, at least one of the Q3 sub-pool sets includes a number of time sub-pools, which is greater than 1.

As a sub-embodiment of the foregoing embodiment, at least two of the Q3 sub-pool sets include time sub-pools, and the number of the time sub-pools is not equal.

As a sub-embodiment of the foregoing embodiment, there is not one time sub-pool in the Q2 time sub-pools that belongs to two sub-pool sets in the Q3 sub-pool set at the same time.

As a sub-embodiment of the foregoing embodiment, all the time sub-pools in any one of the Q3 sub-pool sets belong to the same additional delay time period or additional sensing time slot period that is determined to be idle through energy detection.

As a sub-embodiment of the foregoing embodiment, at least one of the Q2 time sub-pools that do not belong to the Q3 sub-pool set has a corresponding detection value lower than the first threshold.

As a sub-embodiment of the foregoing embodiment, at least one of the time sub-pools in the Q2 time sub-pools that do not belong to the Q3 sub-pool set has a corresponding detection value that is not lower than the first threshold.

Example 12

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

For one embodiment, the first receiver 1201 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, for example.

For one embodiment, the first transmitter 1202 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 12, the first receiver 1201 performs a channel sensing operation in a first sub-band; the first transmitter 1202 transmitting the first signal in the first sub-band or dropping transmitting the first signal in the first sub-band; wherein the channel sensing operation comprises energy detection within a first time window, the energy detection being used to determine whether to transmit the first signal in the first sub-band; the first signal has a spatial correlation with a first reference signal, the first reference signal belongs to a first reference signal set, and the first reference signal set comprises a plurality of reference signals; the first set of reference signals is used to determine a receive parameter configuration for the channel sensing operation; a second time window comprises a set of time resources preceding the first time window, and whether or not there is a transmission of a second signal within the second time window is used to determine the length of the first time window, the second signal having a spatial association with a second reference signal, the second reference signal belonging to the first set of reference signals.

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

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

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

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

For one embodiment, the first node 1200 is a user equipment supporting V2X communication.

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

As an embodiment, the first node 1200 is a base station device 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 above embodiments may be implemented in a hardware form, or may be implemented in a form of software functional modules, and the present application is not limited to any specific form of combination of software and hardware. The first node in this application includes but not limited to wireless communication devices such as cell-phone, panel computer, notebook, network card, low-power consumption equipment, eMTC equipment, NB-IoT equipment, vehicle communication equipment, aircraft, unmanned aerial vehicle, telecontrolled aircraft. The second node in this application includes but not limited to 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 remote control aircraft. The base station device, the base station or the network side device in the present application includes, but is not limited to, a macro cell base station, a micro cell base station, a home base station, a relay base station, an eNB, a gNB, a transmission and reception node TRP, a GNSS, a relay satellite, a satellite base station, an air base station, and other wireless communication devices.

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

Claims

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

a first receiver performing a channel sensing operation at a first sub-band;

2. The first node of claim 1, wherein the first set of reference signals comprises Q1 reference signal subsets, a first reference signal subset being one of the Q1 reference signal subsets, the first reference signal belonging to the first reference signal subset; the first subset of reference signals is used to determine a receive parameter configuration for the channel sensing operation, Q1 being an integer greater than 1; the second reference signal belongs to one of the Q1 reference signal subsets.

3. The first node of claim 2, wherein the Q1 reference signal subsets are associated with Q1 spatial parameter sets, respectively, a first spatial parameter set being one of the Q1 spatial parameter sets corresponding to the first reference signal subset, the first spatial parameter set being used to determine the receive parameter configuration for the channel sensing operation.

4. The first node according to any of claims 1 to 3, wherein a first preset value is used for determining the length of the first time window when there is no transmission of the second signal within the second time window, the first preset value being one of a plurality of alternative integers.

5. The first node of any of claims 1 to 3, wherein acknowledgement information associated with the second signal is used to determine the length of the first time window when there is a transmission of the second signal within the second time window, the acknowledgement information associated with the second signal being used to determine whether the second signal was correctly received.

6. The first node of claim 5, wherein the first transmitter further transmits the second signal and the first receiver further receives a third signal; wherein the third signal is used to determine the acknowledgement information associated with the second signal.

7. The first node of any of claims 1 to 3, wherein the first receiver further receives the second signal and the first transmitter further transmits a third signal; wherein the second signal is used to determine acknowledgement information associated with the third signal, the acknowledgement information associated with the third signal being used to determine whether the third signal was received correctly.

8. The first node of any of claims 1-7, wherein the first time window comprises Q2 time sub-pools, and wherein the 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; the first signal is transmitted in the first sub-band if and only if all of the Q3 of the Q2 detection values are below a first threshold, a start transmission time of the first signal is no earlier than an end time of the first time window, and Q3 is a positive integer no greater than the Q2.

9. The first node of claim 8, wherein the presence or absence of transmission of the second signal within the second time window is used to determine Q4 alternative integers, wherein Q2 is one of the Q4 alternative integers, and wherein Q4 is a positive integer.

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

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