CN116321449A

CN116321449A - User equipment, method and device in base station for wireless communication

Info

Publication number: CN116321449A
Application number: CN202310139453.1A
Authority: CN
Inventors: 张晓博; 杨林
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2018-06-22
Filing date: 2018-06-29
Publication date: 2023-06-23
Also published as: CN110636620B; CN110636620A

Abstract

A method and apparatus in a user equipment, base station, used for wireless communication are disclosed. As one embodiment, a first node receives a first wireless signal within a first time-frequency resource; judging whether first monitoring is needed or not according to the received power in the first time-frequency resource; if the first monitoring is judged not to be needed, a second wireless signal is sent in a second time-frequency resource; if the first monitoring is judged to be needed, discarding the wireless transmission in the second time-frequency resource and executing the first monitoring; wherein the first wireless signal is a useful signal for the first node. The method and the device ensure fairness and improve transmission efficiency and spectrum utilization rate.

Description

User equipment, method and device in base station for wireless communication

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

filing date of the original application: 2018, 06, 29 days

Number of the original application: 201810697927.3

-the name of the invention of the original application: user equipment, method and device in base station for wireless communication

Technical Field

The present application relates to transmission methods and apparatus in wireless communication systems, and more particularly to methods and apparatus for supporting communication over LBT (Listen Before Talk, post-snoop transmission).

Background

Future wireless communication systems have more and more diversified application scenes, and different application scenes have different performance requirements on the system. To meet different performance requirements of various application scenarios, a research project for access of unlicensed spectrum (Unlicensed Spectrum) under NR (New Radio) is fully developed in 3GPP (3 rd Generation Partner Project, third generation partnership project) RAN (Radio Access Network ) # 75.

In LAA (License Assisted Access, licensed assisted access) of LTE (Long Term Evolution ), a transmitter (base station or user equipment) needs to perform LBT (Listen Before Talk, listen before session) before transmitting data on the unlicensed spectrum to ensure that other wireless transmissions on the unlicensed spectrum are not interfered with. In Cat 4LBT (fourth type of LBT, see 3gpp tr 36.889), the transmitter also performs backoff (backoff) after a certain delay period (refer Duration), and the backoff time is counted in units of CCA (Clear Channel Assessment ) slot periods, and the number of the backoff slot periods is obtained by randomly selecting the transmitter within CWS (Contention Window Size, collision window size). For downlink transmission, the CWS is adjusted according to HARQ (Hybrid Automatic Repeat reQuest ) feedback corresponding to data in a reference sub-frame (reference sub-frame) of a previous transmission on the unlicensed spectrum. For uplink transmission, the CWS is adjusted according to whether new data is included in the data in a reference subframe preceding the unlicensed spectrum.

On 3gpp RAN1 (first working group of radio access networks) #93 conferences, the following consensus is reached for NR LAA:

in one gNB COT (Channel Occupation Time, channel occupancy time), no LBT (no-LBT) may be applied in LAA communication for a downlink to uplink or uplink to downlink time interval of less than 16us (micro second).

Disclosure of Invention

The above-mentioned consensus of NR LAA uses the radio signal transmitted by the target transmitter to occupy the air interface resource, and the target receiver can switch to the transmission state directly without performing LBT. The inventors found through research that: directly transmitting the wireless signal without performing LBT may cause unfairness. For example, a wireless signal transmitted by a target transmitter may not be able to prevent wireless transmissions by a neighboring transmitter of the target receiver; the direct switching of the target receiver to the transmitting state may cause interference to neighboring receivers (of the respective neighboring transmitters).

In view of the above findings, the present application discloses a solution. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be arbitrarily combined with each other. Further, while the present application is primarily directed to LAA communications, the methods and apparatus herein are also applicable to communications over licensed spectrum.

The application discloses a method used in a first node of wireless communication, comprising the following steps:

receiving a first wireless signal within a first time-frequency resource;

judging whether first monitoring is needed or not according to the received power in the first time-frequency resource;

if the first monitoring is judged not to be needed, a second wireless signal is sent in a second time-frequency resource; if the first monitoring is judged to be needed, discarding the wireless transmission in the second time-frequency resource and executing the first monitoring;

wherein the first wireless signal is a useful signal for the first node.

As an embodiment, the first radio signal occupies all REs (Resource elements) in the first time-frequency Resource.

As an embodiment, the first wireless signal occupies frequency domain resources that are a subset of frequency domain resources occupied by the first time-frequency resources.

As an embodiment, the first wireless signal occupies the same time domain resource as the first time frequency resource.

As an embodiment, the received power in the first time-frequency resource can be used to determine whether radio interference is present in the first time-frequency resource; if so, indicating that the first wireless signal fails to block the occurrence of wireless interference, the first node needs to perform the first listening to determine whether a channel is idle.

As one embodiment, the first radio signal includes W1 first radio sub-signals, where the W1 first radio sub-signals are sent by W1 transmitters respectively, W1 is a positive integer greater than 1, and any two transmitters in the W1 transmitters are non-co-located.

As an embodiment, the first node is a base station, and the W1 transmitters are W1 terminals, respectively.

As an embodiment, the above method is beneficial for the first node to determine whether there is a hidden node, so that on one hand, interference is avoided, and on the other hand, fairness is ensured.

As an embodiment, compared to LBT technology, the above aspect avoids occupying dedicated time domain resources, and improves transmission efficiency.

As an embodiment, the first radio signal occupies all REs (Resource elements) included in the first time-frequency Resource.

As an embodiment, the above embodiment avoids occupying additional REs and further saves resources compared to using zero-power CSI-RS (Channel Status Information Reference Signal, channel state information reference signal) for interference measurement (IM, interference Measurement).

As an embodiment, the above embodiment does not use partially idle REs for interference measurement, and avoids false alarms caused by ICI (Inter-Carrier Interference ). The above-mentioned false alarm ratio may be high considering that the received power of the first radio signal may be much larger than the threshold of LBT triggering (e.g., -72 dBm).

Specifically, according to one aspect of the present application, the method includes:

the amplitude of the increase of the received power in the first time-frequency resource compared with the reference power is lower than a first threshold value, and the first monitoring is judged not to be needed; or, the amplitude of the increase of the received power in the first time-frequency resource compared with the reference power exceeds a first threshold value, and the first monitoring is judged to be needed;

wherein the reference power is a received power of the first node in a reference time-frequency resource; the starting time of the reference time-frequency resource is before the starting time of the first time-frequency resource, or the time domain resource occupied by the first time-frequency resource comprises the time domain resource occupied by the reference time-frequency resource.

As an embodiment, the frequency domain resources occupied by the first time-frequency resource are a subset of the frequency domain resources occupied by the reference time-frequency resource.

As an embodiment, the frequency domain resource occupied by the first time-frequency resource is the same as the frequency domain resource occupied by the reference time-frequency resource.

As an embodiment, in the above aspect, if the transmission power of the first radio signal remains unchanged, the magnitude of the increase in the received power in the first time-frequency resource compared to the reference power implicitly indicates whether there is bursty radio interference in the first time-frequency resource.

As an embodiment, the method further comprises: or, the amplitude of the increase of the received power in the first time-frequency resource compared with the reference power is equal to the first threshold value, and the first monitoring is judged not to be needed.

As an embodiment, the method further comprises: or, the amplitude of the increase of the received power in the first time-frequency resource compared with the reference power is equal to the first threshold value, and the first monitoring is judged to be needed;

as an embodiment, the unit of the received power in the first time-frequency resource, the reference power and the first threshold value is dBm (milli decibel).

As an embodiment, the unit of the received power in the first time-frequency resource, the reference power and the first threshold value is mW (milliwatt).

the amplitude of the change of the received power in the first time-frequency resource is lower than a second threshold value, and the first monitoring is judged not to be needed; or, the amplitude of the change of the received power in the first time-frequency resource exceeds a second threshold value, and the first monitoring is judged to be needed.

As an embodiment, the unit of the received power in the first time-frequency resource, the reference power and the second threshold is dBm.

As an embodiment, the unit of the received power in the first time-frequency resource, the reference power and the second threshold value is mW.

As an embodiment, the magnitude of the change of the received power in the first time-frequency resource is equal to the second threshold, and it is determined that the first listening is not needed.

As one embodiment, the magnitude of the change of the received power in the first time-frequency resource is equal to the second threshold, and the first listening is determined to be needed.

if the channel is judged to be idle in the first monitoring, transmitting a third wireless signal in a third time-frequency resource; if the channel is judged not to be idle in the first monitoring, discarding wireless transmission in a third time-frequency resource;

wherein the first snoop is determined to be required.

As an embodiment, if it is determined that the first listening is not needed, a fourth wireless signal is transmitted in a third time-frequency resource.

As an embodiment, the third wireless signal and the fourth wireless signal are identical.

As an embodiment, the time domain resource occupied by the second time-frequency resource precedes the time domain resource occupied by the third time-frequency resource.

As an embodiment, the starting time of the second time-frequency resource is before the starting time of the third time-frequency resource.

As a sub-embodiment of the above embodiment, the duration of the third time-frequency resource in the time domain is longer than the duration of the second time-frequency resource in the time domain.

operating the first control information;

wherein the first control information includes scheduling information corresponding to the first wireless signal; the first node is a user equipment and the operation is a reception, or the first node is a base station and the operation is a transmission.

As an embodiment, the scheduling information includes occupied frequency domain resources, MCS (Modulation and Coding Status, modulation coding scheme), RV (Redundancy Version ) and HARQ (Hybrid Automatic Repeat reQuest, hybrid automatic repeat request) Process Number (Process Number).

As an embodiment, the scheduling information includes NDI (New Data Indicator, new data indication).

As an embodiment, the scheduling information comprises occupied time domain resources.

Specifically, according to an aspect of the present application, the starting time of the second time-frequency resource is before the starting time of the third time-frequency resource.

As an embodiment, the frequency domain resource occupied by the second time-frequency resource is the same as the frequency domain resource occupied by the third time-frequency resource.

operating the second control information;

wherein the second control information indicates one type of LBT from among L1 types of LBTs, the L1 being a positive integer greater than 1; the L1 type of LBT comprises a first type of LBT, the L1 type of LBT comprising at least one of a single-transmitted LBT and a multiple-transmitted LBT; said determining whether a first snoop is required based on received power in said first time-frequency resource is performed only if said one type of LBT indicated by said second control information is said first type of LBT; the first node is a user equipment and the operation is a reception, or the first node is a base station and the operation is a transmission.

Specifically, according to an aspect of the present application, the first node is a base station device.

Specifically, according to an aspect of the present application, the first node is a user equipment.

The application discloses a method used in a second node of wireless communication, comprising the following steps:

transmitting a first wireless signal within a first time-frequency resource, wherein a received power within the first time-frequency resource is used to determine whether a first listening is required;

monitoring a second wireless signal within a second time-frequency resource;

wherein the first wireless signal is a useful signal for the first node; if the first listening is determined not to be needed, the second wireless signal is present in the second time-frequency resource; if the first listening is determined to be required, the second wireless signal is not present in the second time-frequency resource.

Specifically, according to an aspect of the present application, the magnitude of the increase in the received power in the first time-frequency resource compared to the reference power is lower than a first threshold, and the first listening is determined not to be needed; or the amplitude of the increase of the received power in the first time-frequency resource compared with the reference power exceeds a first threshold, and the first monitoring is judged as being needed; wherein the reference power is a received power of the first node in a reference time-frequency resource; the starting time of the reference time-frequency resource is before the starting time of the first time-frequency resource, or the time domain resource occupied by the first time-frequency resource comprises the time domain resource occupied by the reference time-frequency resource.

Specifically, according to an aspect of the present application, the amplitude of the change of the received power in the first time-frequency resource is lower than a second threshold, and the first listening is determined as not being needed; alternatively, the magnitude of the received power change within the first time-frequency resource exceeds a second threshold, and the first listening is determined to be required.

monitoring a third wireless signal in a third time-frequency resource;

wherein if the channel is determined to be idle in the first listening, the third wireless signal exists in the third time-frequency resource; if the channel is judged not to be idle in the first monitoring, the third wireless signal does not exist in the third time-frequency resource; the first snoop is determined to be required.

processing the first control information;

wherein the first control information includes scheduling information corresponding to the first wireless signal; the second node is a base station and the processing is transmitting, or the second node is a user equipment and the processing is receiving.

processing the second control information;

wherein the second control information indicates one type of LBT from among L1 types of LBTs, the L1 being a positive integer greater than 1; the L1 type of LBT comprises a first type of LBT, the L1 type of LBT comprising at least one of a single-transmitted LBT and a multiple-transmitted LBT; said determining whether a first snoop is required based on received power in said first time-frequency resource is performed only if said one type of LBT indicated by said second control information is said first type of LBT; the second node is a user equipment and the processing is receiving, or the second node is a base station and the processing is transmitting.

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

a first receiving module: receiving a first wireless signal within a first time-frequency resource;

a first judging module: judging whether first monitoring is needed or not according to the received power in the first time-frequency resource;

a first sending module: if the first monitoring is judged not to be needed, a second wireless signal is sent in a second time-frequency resource; if the first monitoring is judged to be needed, discarding the wireless transmission in the second time-frequency resource and executing the first monitoring;

wherein the first wireless signal is a useful signal for the first node.

As an embodiment, the first node used for wireless communication is characterized in that the first determining module determines that the first listening is not needed, and the magnitude of the increase in the received power in the first time-frequency resource compared to the reference power is lower than a first threshold; or the first judging module judges that the first monitoring is needed, and the amplitude of the increase of the received power in the first time-frequency resource compared with the reference power exceeds a first threshold; wherein the reference power is a received power of the first node in a reference time-frequency resource; the starting time of the reference time-frequency resource is before the starting time of the first time-frequency resource, or the time domain resource occupied by the first time-frequency resource comprises the time domain resource occupied by the reference time-frequency resource.

As an embodiment, the first node used for wireless communication is characterized in that the amplitude of the change of the received power in the first time-frequency resource is lower than a second threshold, and the first judging module judges that the first listening is not needed; or the amplitude of the change of the received power in the first time-frequency resource exceeds a second threshold, and the first judging module judges that the first monitoring is needed.

As an embodiment, the first node used for wireless communication is characterized in that the first transmitting module transmits a third wireless signal in a third time-frequency resource if a channel is determined to be idle in the first listening; if the channel is judged not to be idle in the first monitoring, the first transmitting module gives up wireless transmission in a third time-frequency resource; wherein the first snoop is determined to be required.

As an embodiment, the first node used for wireless communication is characterized in that the first receiving module receives first control information; wherein the first control information includes scheduling information corresponding to the first wireless signal; the first node is a user equipment.

As an embodiment, the first node used for wireless communication is characterized in that the first transmitting module transmits first control information; wherein the first control information includes scheduling information corresponding to the first wireless signal; the first node is a base station.

As an embodiment, the first node used for wireless communication is characterized in that the start time of the second time domain resource is before the start time of the third time domain resource.

As an embodiment, the first node used for wireless communication is characterized in that the first node is a base station device.

As an embodiment, the first node used for wireless communication is characterized in that the first node is a user equipment.

As an embodiment, the first node used for wireless communication is characterized in that the first receiving module receives second control information; wherein the second control information indicates one type of LBT from among L1 types of LBTs, the L1 being a positive integer greater than 1; the L1 type of LBT comprises a first type of LBT, the L1 type of LBT comprising at least one of a single-transmitted LBT and a multiple-transmitted LBT; said determining whether a first snoop is required based on received power in said first time-frequency resource is performed only if said one type of LBT indicated by said second control information is said first type of LBT; the first node is a user equipment.

As an embodiment, the first node used for wireless communication is characterized in that the first transmitting module transmits second control information; wherein the second control information indicates one type of LBT from among L1 types of LBTs, the L1 being a positive integer greater than 1; the L1 type of LBT comprises a first type of LBT, the L1 type of LBT comprising at least one of a single-transmitted LBT and a multiple-transmitted LBT; said determining whether a first snoop is required based on received power in said first time-frequency resource is performed only if said one type of LBT indicated by said second control information is said first type of LBT; the first node is a base station.

and a second sending module: transmitting a first wireless signal within a first time-frequency resource, wherein a received power within the first time-frequency resource is used to determine whether a first listening is required;

and a second receiving module: monitoring a second wireless signal within a second time-frequency resource;

As an embodiment, the second node used for wireless communication is characterized in that the magnitude of the increase in received power in the first time-frequency resource compared to a reference power is below a first threshold, the first listening being determined not to be needed; or the amplitude of the increase of the received power in the first time-frequency resource compared with the reference power exceeds a first threshold, and the first monitoring is judged as being needed; wherein the reference power is a received power of the first node in a reference time-frequency resource; the starting time of the reference time-frequency resource is before the starting time of the first time-frequency resource, or the time domain resource occupied by the first time-frequency resource comprises the time domain resource occupied by the reference time-frequency resource.

As an embodiment, the second node used for wireless communication is characterized in that the amplitude of the received power variation within the first time-frequency resource is below a second threshold, the first listening being determined not to be needed; alternatively, the magnitude of the received power change within the first time-frequency resource exceeds a second threshold, and the first listening is determined to be required.

As an embodiment, the second node used for wireless communication is characterized in that the second receiving module monitors a third wireless signal in a third time-frequency resource; wherein if the channel is determined to be idle in the first listening, the third wireless signal exists in the third time-frequency resource; if the channel is judged not to be idle in the first monitoring, the third wireless signal does not exist in the third time-frequency resource; the first snoop is determined to be required.

As an embodiment, the second node used for wireless communication is characterized in that the second transmitting module transmits the first control information; the first control information includes scheduling information corresponding to the first wireless signal, and the second node is a base station.

As an embodiment, the second node used for wireless communication is characterized in that the second receiving module receives the first control information; the first control information includes scheduling information corresponding to the first wireless signal, and the second node is user equipment.

As an embodiment, the second node used for wireless communication is characterized in that a start time of the second time-frequency resource is before a start time of the third time-frequency resource.

As an embodiment, the second node used for wireless communication is characterized in that the second transmitting module transmits the second control information; wherein the second control information indicates one type of LBT from among L1 types of LBTs, the L1 being a positive integer greater than 1; the L1 type of LBT comprises a first type of LBT, the L1 type of LBT comprising at least one of a single-transmitted LBT and a multiple-transmitted LBT; said determining whether a first snoop is required based on received power in said first time-frequency resource is performed only if said one type of LBT indicated by said second control information is said first type of LBT; the second node is a base station.

As an embodiment, the second node used for wireless communication is characterized in that the second receiving module receives second control information; wherein the second control information indicates one type of LBT from among L1 types of LBTs, the L1 being a positive integer greater than 1; the L1 type of LBT comprises a first type of LBT, the L1 type of LBT comprising at least one of a single-transmitted LBT and a multiple-transmitted LBT; said determining whether a first snoop is required based on received power in said first time-frequency resource is performed only if said one type of LBT indicated by said second control information is said first type of LBT; the second node is a user equipment.

As an embodiment, the second node used for wireless communication is characterized in that the second node is a base station device.

As an embodiment, the second node used for wireless communication is characterized in that the second node is a user equipment.

As an example, compared to the conventional solution, the present application has the following advantages:

ensuring fairness of resource occupation;

reducing interference;

transmission efficiency is improved.

Drawings

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

FIG. 1 illustrates a flow chart of a first node side according to one embodiment of the present application;

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

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

fig. 4 shows a schematic diagram of an NR (New Radio) node and a UE according to an embodiment of the present application;

FIG. 5 illustrates a flow chart of communication between a first node and a second node according to one embodiment of the present application;

FIG. 6 illustrates a flow chart of a first listening of a single transmission according to one embodiment of the present application;

FIG. 7 illustrates a schematic diagram of a first threshold according to one embodiment of the present application;

FIG. 8 illustrates a schematic diagram of a second threshold according to one embodiment of the present application;

FIG. 9 illustrates a flow chart of a first listening of multiple transmissions according to one embodiment of the present application;

fig. 10 shows a schematic diagram of a first control signaling according to an embodiment of the present application;

FIG. 11 illustrates a schematic diagram of a first time-frequency resource according to one embodiment of the present application;

FIG. 12 illustrates a schematic diagram of a second time domain resource according to one embodiment of the present application;

FIG. 13 illustrates a schematic diagram of reference time-frequency resources and first time-frequency resources according to one embodiment of the present application;

FIG. 14 illustrates a block diagram of a processing device in a first node according to one embodiment of the present application;

fig. 15 shows a block diagram of the processing device in the second node according to an embodiment of the present application.

Detailed Description

Example 1

Embodiment 1 illustrates a flow chart of a first node side, as shown in fig. 1.

In embodiment 1, a first node receives a first wireless signal within a first time-frequency resource in step S01; in step S02, determining whether a first monitoring is required according to the received power in the first time-frequency resource; if it is determined that the first monitoring is not required, transmitting a second wireless signal in a second time-frequency resource in step S03; if it is determined that the first listening is required, discarding the transmission of the second wireless signal in the second time-frequency resource and performing the first listening in step S04;

In embodiment 1, the first wireless signal is a useful signal for the first node.

As an embodiment, the act of discarding the second wireless signal transmitted in the second time-frequency resource includes: and discarding the modulation symbol corresponding to the second wireless signal.

As an embodiment, the act of discarding the second wireless signal transmitted in the second time-frequency resource includes: and clearing the buffer memory occupied by the bits which are carried by the second wireless signal and are subjected to channel coding.

As an embodiment, the act of discarding the second wireless signal transmitted in the second time-frequency resource includes: deferring transmission of the second wireless signal.

As an embodiment, the act of discarding the second wireless signal transmitted in the second time-frequency resource includes: and punching (Puncture) a modulation symbol corresponding to the second wireless signal on a second time-frequency resource.

As an embodiment, the act of discarding the sending of the second wireless signal in the second time-frequency resource and performing the first listening in step S04 includes: and detecting the energy of the received signal in the target time-frequency Resource to judge whether a channel is idle, wherein at least one RE (Resource Element) exists and belongs to the target time-frequency Resource and the second time-frequency Resource simultaneously.

As an embodiment, the target time-frequency resource includes the second time-frequency resource.

As an embodiment, the first time-frequency resource and the second time-frequency resource respectively include a plurality of REs, one RE occupies one multi-carrier symbol in a time domain and one subcarrier in a frequency domain.

As an embodiment, the multi-carrier symbol is an OFDM (Orthogonal Frequency Division Multiplexing ) symbol.

As an embodiment, the multi-carrier symbol is an SC-FDMA (Single Carrier Frequency Division Multiplexing Access, single carrier frequency division multiple access) symbol.

As an embodiment, the multi-Carrier symbol is an FBMC (Filter Bank Multi-Carrier ) symbol.

As an embodiment, the received power in the first time-frequency resource includes a linear average of (sampled) total received power observed by the first node in all REs included in the first time-frequency resource, a unit of the total received power observed in all REs included in the first time-frequency resource is a watt (W), and the first time-frequency resource occupies the measurement bandwidth in a frequency domain.

As an embodiment, the first node is a UE, and the received power in the first time-frequency resource includes an RSSI (Received Signal Strength Indicator, received signal strength indication)

As an embodiment, the first time-frequency resource includes Q1 multi-carrier symbols in a time domain, Q1 is a positive integer, the received power in the first time-frequency resource includes a linear average of (sampled) total received power observed by the first node in a measurement bandwidth in the Q1 multi-carrier symbols, a unit of the total received power observed in the measurement bandwidth in the Q1 multi-carrier symbols is a watt (W), and the first time-frequency resource occupies the measurement bandwidth in a frequency domain.

As one embodiment, Q1 is 1.

As one embodiment, Q1 is greater than 1.

As an embodiment, the Reference point (Reference point) of the received power within the first time-frequency resource is an antenna connector (antenna connector) of the first node.

As an embodiment, the first node uses Receiver diversity (Receiver Diversity), the received power in the first time-frequency resource is not lower than the corresponding received power in the first time-frequency resource of any one Individual (Receiver branch).

As an embodiment, the first radio signal comprises a data signal and a corresponding demodulation reference signal (Demodulation Reference Signal).

As an embodiment, the first node is a base station, and the physical layer channel occupied by the data signal in the first wireless signal includes PUSCH (Physical Uplink Shared Channel ).

As an embodiment, the first node is a base station, and the physical layer channel occupied by the data signal in the first wireless signal includes a PUCCH (Physical Uplink Control Channel, physical uplink shared channel).

As an embodiment, the first node is a UE (User Equipment), and a physical layer channel occupied by a data signal in the first radio signal includes a PDSCH (Physical Downlink Shared Channel ).

As an embodiment, the first node is a UE, and the physical layer channel occupied by the data signal in the first radio signal includes a PDCCH (Physical Downlink Control Channel, physical downlink shared channel).

As an embodiment, the second radio signal comprises a data signal and a corresponding demodulation reference signal.

As an embodiment, the first node is a UE, and the physical layer channel occupied by the data signal in the second wireless signal includes a PUSCH.

As an embodiment, the first node is a UE, and the physical layer channel occupied by the data signal in the first wireless signal includes a PUCCH.

As an embodiment, the first node is a base station, and the physical layer channel occupied by the data signal in the first wireless signal includes PDSCH (Physical Downlink Shared Channel ).

As an embodiment, the first node is a base station, and the physical layer channel occupied by the data signal in the first wireless signal includes a PDCCH.

As an embodiment, the first node is a base station and the first radio signal comprises SRS (Sounding Reference Signal ).

As an embodiment, the first node is a UE and the first radio signal comprises a CSI-RS (Channel Status Information Reference Signal, channel state information reference signal).

As an embodiment, the first node is a base station and the second wireless signal comprises CSI-RS.

As an embodiment, the first node is a UE and the second wireless signal includes SRS.

As an embodiment, the first listening is used by the first node to determine whether a channel is idle.

As an embodiment, the first radio signal occupies all REs in the first time-frequency resource.

As an embodiment, the first radio signal occupies a part of REs in the first time-frequency resource.

As one embodiment, the first wireless signal being a useful signal for the first node comprises: the bit block carried by the first wireless signal is scrambled by adopting the identity (Identifier) of the first node.

As an embodiment, the first node is a user equipment, and the identity of the first node is an RNTI.

As an embodiment, the first node is a base station and the identity of the first node is a PCI (Physical Cell Identifier, physical cell identity).

As one embodiment, the first wireless signal being a useful signal for the first node comprises: the identity of the first node is used to generate an RS sequence for a DMRS (DeModulation Reference Signal ) corresponding to the first radio signal.

As one embodiment, the first wireless signal being a useful signal for the first node comprises: the first node performs Channel Decoding (Channel Decoding) on the first wireless signal.

As one embodiment, the first wireless signal being a useful signal for the first node comprises: the first node performing channel coding on the first wireless signal; if the decoding is correct, the first node passes the decoded output to higher layers, and if the decoding is incorrect, the first node sends a NACK.

As an embodiment, the first snoop is one of X types of LBTs.

As one example, the X types of LBTs include a type 2 (Category 2) LBT.

As one example, the X types of LBTs include a type 4 (Category 4) LBT.

As an embodiment, the X types of LBTs include at least one single shot (one shot) LBT and one multiple shot (multiple shot) LBT.

Example 2

Embodiment 2 illustrates a schematic diagram of a network architecture, as shown in fig. 2.

Fig. 2 illustrates a network architecture 200 of LTE (Long-Term Evolution), LTE-a (Long-Term Evolution Advanced, enhanced Long-Term Evolution) and future 5G systems. The LTE network architecture 200 may be referred to as EPS (Evolved Packet System ) 200.EPS 200 may include one or more UEs (User Equipment) 201, e-UTRAN-NR (evolved UMTS terrestrial radio access network-new radio) 202,5G-CN (5G-CoreNetwork, 5G core)/EPC (Evolved Packet Core ) 210, hss (Home Subscriber Server, home subscriber server) 220, and internet service 230. Among them, UMTS corresponds to a universal mobile telecommunications service (Universal Mobile Telecommunications System). The EPS200 may interconnect with other access networks, but these entities/interfaces are not shown for simplicity. As shown in fig. 2, EPS200 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. E-UTRAN-NR202 includes NR (New Radio), node B (gNB) 203 and other gNBs 204. The gNB203 provides user and control plane protocol termination towards the UE 201. The gNB203 may be connected to other gnbs 204 via an X2 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), TRP (transmit-receive point), or some other suitable terminology. The gNB203 provides the UE201 with an access point to the 5G-CN/EPC210. Examples of UE201 include a cellular telephone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a Personal Digital Assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a game console, an drone, an aircraft, a narrowband physical network device, a machine-type communication device, a land vehicle, an automobile, a wearable device, or any other similar functional device. Those of skill in the art may also refer to the 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 5G-CN/EPC210 through an S1 interface. The 5G-CN/EPC210 includes an MME211, other MMEs 214, an S-GW (Service Gateway) 212, and a P-GW (Packet Date Network Gateway, packet data network Gateway) 213. The MME211 is a control node that handles signaling between the UE201 and the 5G-CN/EPC210. In general, the MME211 provides bearer and connection management. All user IP (Internet Protocal, internet protocol) packets are transported through the S-GW212, which S-GW212 itself is connected to P-GW213. The P-GW213 provides UE IP address assignment as well as other functions. The P-GW213 is connected to the internet service 230. The internet service 230 includes operator-corresponding internet protocol services, which may include, in particular, the internet, intranets, IMS (IP Multimedia Subsystem ) and PS streaming services (PSs).

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

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

As a sub-embodiment, the UE201 supports wireless communications over unlicensed spectrum.

As a sub-embodiment, the gNB203 supports wireless communications over unlicensed spectrum.

As a sub-embodiment, the UE201 supports LBT.

As a sub-embodiment, the gNB203 supports LBT.

Example 3

Embodiment 3 illustrates a schematic diagram of an embodiment of a radio protocol architecture for the user plane and the control plane, as shown in fig. 3.

Fig. 3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane and a control plane, fig. 3 shows the radio protocol architecture for a UE and a gNB with three layers: layer 1, layer 2 and layer 3. Layer 1 (L1 layer) is the lowest layer and implements various PHY (physical layer) signal processing functions. The L1 layer will be referred to herein as PHY301. Layer 2 (L2 layer) 305 is above PHY301 and is responsible for the link between the UE and the gNB through PHY301. In the user plane, the L2 layer 305 includes a MAC (Medium Access Control ) sublayer 302, an RLC (Radio Link Control, radio link layer control protocol) sublayer 303, and a PDCP (Packet Data Convergence Protocol ) sublayer 304, which terminate at the gNB on the network side. Although not shown, the UE may have several protocol layers above the L2 layer 305, including a network layer (e.g., IP layer) that terminates at the P-GW213 on the network side and an application layer that terminates at the other end of the connection (e.g., remote UE, server, etc.). The PDCP sublayer 304 provides multiplexing between different radio bearers and logical channels. The PDCP sublayer 304 also provides header compression for upper layer data packets to reduce radio transmission overhead, security by ciphering the data packets, and handover support for UEs between gnbs. The RLC sublayer 303 provides segmentation and reassembly of upper layer packets, retransmission of lost packets, and reordering of packets to compensate for out-of-order reception due to HARQ (Hybrid Automatic Repeat reQuest ). The MAC sublayer 302 provides multiplexing between logical and transport channels. The MAC sublayer 302 is also responsible for allocating the various radio resources (e.g., resource blocks) in one cell among the UEs. The MAC sublayer 302 is also responsible for HARQ operations. In the control plane, the radio protocol architecture for the UE and the gNB is substantially the same for the physical layer 301 and the L2 layer 305, but there is no header compression function for the control plane. The control plane also includes an RRC (Radio Resource Control ) sublayer 306 in layer 3 (L3 layer). The RRC sublayer 306 is responsible for obtaining radio resources (i.e., radio bearers) and configuring the lower layers using RRC signaling between the gNB and the UE.

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

As an embodiment, the wireless protocol architecture in fig. 3 is applicable to the second node in the present application.

As an embodiment, the first control information in the present application is generated in the PHY301.

As an embodiment, the second control information in the present application is generated in the PHY301.

As an embodiment, the first control information in the present application is generated in the MAC sublayer 302.

As an embodiment, the second control information in the present application is generated in the MAC sublayer 302.

As an embodiment, the first control information in the present application is generated in the RRC sublayer 306.

As an embodiment, the second control information in the present application is generated in the RRC sublayer 306.

Example 4

Embodiment 4 illustrates a schematic diagram of an NR node and a UE, as shown in fig. 4. Fig. 4 is a block diagram of a UE450 and a gNB410 communicating with each other in an access network.

The gNB410 includes a controller/processor 475, a memory 476, a receive processor 470, a transmit processor 416, a multi-antenna receive processor 472, a multi-antenna transmit processor 471, a transmitter/receiver 418, and an antenna 420.

UE450 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 DL (Downlink), at the gNB410, upper layer packets from the core network are provided to a controller/processor 475. The controller/processor 475 implements the functionality of the L2 layer. In DL, a controller/processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocations to UE450 based on various priority metrics. The controller/processor 475 is also responsible for HARQ operations, retransmission of lost packets, and signaling to the UE 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for the L1 layer (i.e., physical layer). The transmit processor 416 performs coding and interleaving to facilitate Forward Error Correction (FEC) at the UE450, as well as mapping of signal clusters 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/beamforming processing on the encoded and modulated symbols to generate one or more spatial streams. A transmit processor 416 then maps each spatial stream to a subcarrier, 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 a physical channel carrying the time domain multicarrier symbol stream. 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 multiple antenna transmit processor 471 to a radio frequency stream and then provides it to a different antenna 420.

In DL (Downlink), at the UE450, each receiver 454 receives signals 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 multicarrier symbol stream that is provided to a receive processor 456. The receive processor 456 and the multi-antenna receive processor 458 implement various signal processing functions for 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. The receive processor 456 converts the baseband multicarrier symbol stream after receiving the 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 signal and the reference signal are demultiplexed by the receive processor 456, where the reference signal is to be used for channel estimation, and the data signal is subjected to multi-antenna detection in the multi-antenna receive processor 458 to recover any spatial streams destined for the UE 450. The symbols on each spatial stream are demodulated and recovered in a receive processor 456 and soft decisions are generated. The soft decisions are then decoded and deinterleaved by a receive processor 456 to recover the upper layer data and control signals that were transmitted by the gNB410 on the physical channel. The upper layer data and control signals are then provided to the controller/processor 459. The controller/processor 459 implements the functions of the L2 layer. The controller/processor 459 may be associated with a memory 460 that stores program codes and data. Memory 460 may be referred to as a computer-readable medium. In DL, the controller/processor 459 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover upper layer data packets from the core network. The upper layer packets are then provided to all protocol layers above the L2 layer. Various control signals may also be provided to L3 for L3 processing. The controller/processor 459 is also responsible for error detection using Acknowledgement (ACK) and/or Negative Acknowledgement (NACK) protocols to support HARQ operations.

In UL (Uplink), a data source 467 is used at the UE450 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 gNB410 described in DL, the controller/processor 459 implements header compression, ciphering, packet segmentation and reordering, and multiplexing between logical and transport channels based on radio resource allocations of the gNB410, implementing L2 layer functions for the user and control planes. The controller/processor 459 is also responsible for HARQ operations, retransmission of lost packets, and signaling to the gNB 410. The transmit processor 468 performs modulation mapping, channel coding, and digital multi-antenna spatial precoding/beamforming, with the multi-antenna transmit processor 457 then modulating the resulting spatial stream into a multi-carrier/single-carrier symbol stream, which is analog precoded/beamformed in the multi-antenna transmit processor 457 before being provided to the various antennas 452 via the transmitter 454. 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 it to an antenna 452.

In UL (Uplink), the function at the gNB410 is similar to the reception function at the UE450 described in DL. Each receiver 418 receives radio frequency signals through its corresponding antenna 420, converts the received radio frequency signals to baseband signals, and provides the baseband signals to a multi-antenna receive processor 472 and a receive processor 470. The receive processor 470 and the multi-antenna receive processor 472 collectively implement the functions of the L1 layer. The controller/processor 475 implements L2 layer functions. The controller/processor 475 may be associated with a memory 476 that stores program codes and data. Memory 476 may be referred to as a computer-readable medium. In the UL, the controller/processor 475 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover upper layer data packets from the UE 450. Upper layer packets from the controller/processor 475 may be provided to the core network. The controller/processor 475 is also responsible for error detection using an ACK and/or NACK protocol to support HARQ operations.

As an embodiment, the UE450 corresponds to a first node in the present application, and the UE450 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 UE450 apparatus at least: receiving a first wireless signal within a first time-frequency resource; judging whether first monitoring is needed or not according to the received power in the first time-frequency resource; if the first monitoring is judged not to be needed, a second wireless signal is sent in a second time-frequency resource; if the first monitoring is judged to be needed, discarding the wireless transmission in the second time-frequency resource and executing the first monitoring; wherein the first wireless signal is a useful signal for the first node.

As an embodiment, the UE450 corresponds to a first node in the present application, and the UE450 includes: a memory storing a program of computer-readable instructions that, when executed by at least one processor, produce acts comprising: receiving a first wireless signal within a first time-frequency resource; judging whether first monitoring is needed or not according to the received power in the first time-frequency resource; if the first monitoring is judged not to be needed, a second wireless signal is sent in a second time-frequency resource; if the first monitoring is judged to be needed, discarding the wireless transmission in the second time-frequency resource and executing the first monitoring; wherein the first wireless signal is a useful signal for the first node.

As an embodiment, the gNB410 corresponds to a first node in the present application, and the gNB410 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 gNB410 means at least: receiving a first wireless signal within a first time-frequency resource; judging whether first monitoring is needed or not according to the received power in the first time-frequency resource; if the first monitoring is judged not to be needed, a second wireless signal is sent in a second time-frequency resource; if the first monitoring is judged to be needed, discarding the wireless transmission in the second time-frequency resource and executing the first monitoring; wherein the first wireless signal is a useful signal for the first node.

As an embodiment, the gNB410 corresponds to a first node in the present application, and the gNB410 includes: a memory storing a program of computer-readable instructions that, when executed by at least one processor, produce acts comprising: receiving a first wireless signal within a first time-frequency resource; judging whether first monitoring is needed or not according to the received power in the first time-frequency resource; if the first monitoring is judged not to be needed, a second wireless signal is sent in a second time-frequency resource; if the first monitoring is judged to be needed, discarding the wireless transmission in the second time-frequency resource and executing the first monitoring; wherein the first wireless signal is a useful signal for the first node.

As an embodiment, the UE450 corresponds to a first node in the present application, and the gNB410 corresponds to a second node in the present application.

As an embodiment, the UE450 corresponds to a second node in the present application, and the gNB410 corresponds to a first node in the present application.

As an embodiment, { the antenna 452, the receiver 454, the reception processor 456} is used to receive the first control information in the present application; { the antenna 420, the transmitter 418, the transmit processor 416} is used to transmit the first control information in the present application.

As an embodiment, at least one of the multi-antenna receive processor 458, the controller/processor 459 is configured to receive the first control information in the present application; { the multi-antenna transmit processor 471, at least one of the controller/processor 475} is used to transmit the first control information in the present application.

As an embodiment, { the antenna 452, the receiver 454, the reception processor 456} is used to receive the second control information in the present application; { the antenna 420, the transmitter 418, the transmit processor 416} is used to transmit the second control information in the present application.

As an embodiment, at least one of the multi-antenna receive processor 458, the controller/processor 459 is configured to receive the second control information in the present application; { the multi-antenna transmit processor 471, at least one of the controller/processor 475} is used to transmit the second control information in the present application.

As an embodiment, the gNB410 and the UE450 correspond to a first node and a second node in the present application, respectively; { the antenna 420, the receiver 418, the reception processor 470} is used to receive the first wireless signal in the present application; { the antenna 452, the transmitter 454, the transmission processor 468} is used to transmit the first wireless signal in the present application; { the antenna 452, the receiver 454, the reception processor 456} is used to receive the second wireless signal in the present application; { the antenna 420, the transmitter 418, the transmit processor 416} is used to transmit the second wireless signal in the present application.

As a sub-embodiment of the above embodiment, { the multi-antenna receive processor 472, at least one of the controller/processor 475} is used to receive the first wireless signal in the present application; { the multi-antenna transmit processor 457, at least one of the controller/processor 459} is used to transmit the first wireless signal in the present application.

As another sub-embodiment of the above embodiment, { the multi-antenna receive processor 458, at least one of the controller/processor 459} is used to receive the second wireless signal in the present application; { the multi-antenna transmit processor 471, at least one of the controller/processor 475} is used to transmit the second wireless signal in the present application.

Example 5

Embodiment 5 illustrates a flow chart of communication between a first node and a second node, as shown in fig. 5. In fig. 1, the steps in block F1 and the steps in block F2 are optional, respectively, and the steps in block F1 and the steps in block F2 cannot occur simultaneously.

For the first node N1, receiving a first wireless signal within a first time-frequency resource in step S11; in step S12, determining whether a first monitoring is required according to the received power in the first time-frequency resource; if it is determined in the step S12 that the first listening is not required, transmitting a second radio signal in a second time-frequency resource in a step S13 and a third radio signal in a third time-frequency resource in a step S14; if it is determined in the step S12 that the first listening is required, discarding the wireless transmission in the second time-frequency resource and performing the first listening in a step S15; if it is judged in the step S15 that the channel is idle, jumping to the step S14; if it is determined in the step S15 that the channel is not idle, discarding the radio transmission in the third time-frequency resource in the step S16;

For the second node N2, transmitting a first wireless signal within the first time-frequency resource in step S21; monitoring a second wireless signal within a second time-frequency resource in step S22; monitoring a third wireless signal within a third time-frequency resource in step S23;

in embodiment 5, the first wireless signal is a useful signal for the first node, among the useful signals for the first node; if the first listening is determined not to be needed in the step S12, the second wireless signal exists in the second time-frequency resource; if the first listening is determined to be required in the step S12, the second wireless signal is not present in the second time-frequency resource.

As one embodiment, a first block of bits is used to generate a first set of modulation symbols, the first set of modulation symbols is used to generate a combined wireless signal, the second wireless signal is a portion of the combined wireless signal mapped in the second time-frequency resource, and the third wireless signal is a portion of the combined wireless signal mapped in the third time-frequency resource.

An advantage of the above-described embodiment is that the modulation symbols comprised by the third wireless signal are unaffected, whether or not the second wireless signal is transmitted by the first node N1; the second node N2 is able to perform channel decoding for the first bit block.

As an embodiment, the first modulation symbol set is an output after the first bit block is sequentially subjected to Channel Coding (Channel Coding), scrambling (Scrambling), and modulation mapper (Modulation Mapper).

As an embodiment, the combined radio signal is output from the first modulation symbol set after passing through a Layer Mapper (Layer Mapper), a Precoding (Precoding), a resource element Mapper (Resource Element Mapper), and a wideband symbol Generation (Generation) in sequence.

As an embodiment, the combined radio signal is output by the first set of modulation symbols after passing through a resource element mapper (Resource Element Mapper) and wideband symbol Generation (Generation) in sequence.

As an embodiment, the first bit block is used to generate the third wireless signal, the second wireless signal being a reference signal.

As an embodiment, the first bit block is output after Channel Coding (Channel Coding), scrambling (Scrambling), modulation Mapper (Modulation Mapper), layer Mapper (Layer Mapper), precoding (Precoding), resource element Mapper (Resource Element Mapper), wideband symbol Generation (Generation) in sequence.

As an embodiment, the combined radio signal is output after the first bit block is sequentially subjected to Channel Coding (Channel Coding), scrambling (Scrambling), modulation mapper (Modulation Mapper), resource element mapper (Resource Element Mapper), and wideband symbol Generation.

As an embodiment, the first bit Block includes a TB (Transport Block).

As an embodiment, the first bit Block includes one or more CBGs (Code Block groups).

As an embodiment, the first node N1 and the second node N2 are a base station and a UE, respectively, the first node N1 transmits the first control signaling in step S10, and the first node N2 receives the first control signaling in step S20.

As an embodiment, the first node N1 and the second node N2 are a UE and a base station, respectively, the first node N1 receives the first control signaling in step S100, and the first node N2 transmits the first control signaling in step S200.

As a sub-embodiment of the above embodiment, the first control signaling is cell-common.

As an embodiment, the first control signaling is a DCI (Downlink Control Information ).

As an embodiment, the first control signaling includes first control information; the first control information includes scheduling information corresponding to the first wireless signal.

As an embodiment, the first control signaling includes second control information indicating one type of LBT from L1 types of LBTs, the L1 being a positive integer greater than 1; the L1 type of LBT comprises a first type of LBT, the L1 type of LBT comprising at least one of a single-transmitted LBT and a multiple-transmitted LBT; the step of determining whether the first listening is required is performed based on the received power in the first time-frequency resource only if the one type of LBT indicated by the second control information is the first type of LBT.

As an embodiment, the second control information includes scheduling information of the combined wireless signal.

As an embodiment, the second control information includes scheduling information of the second wireless signal.

As an embodiment, the scheduling information of the second radio signal is also applied to the third radio signal.

As one embodiment, the L1 type of LBT consists of the first type of LBT and X type of LBT, X being a positive integer, the L1 being greater than the X by 1.

As one example, the X types of LBTs include a type 2 (Category 2) LBT.

As one example, the X types of LBTs include a type 4 (Category 4) LBT.

As one embodiment, the first type of LBT is no LBT (no LBT).

As an embodiment, the scheduling information includes occupied frequency domain resources, and the occupied time domain resources.

As an example, the scheduling information includes MCS (Modulation and Coding Status, modulation coding scheme).

As an embodiment, the scheduling information includes RV (Redundancy Version ).

As an embodiment, the scheduling information includes HARQ (Hybrid Automatic Repeat reQuest ) Process Number (Process Number).

As an embodiment, the first node N1 and the second node N2 are a base station and a UE, respectively, and the first control information is DCI (Downlink Control Information ) for an uplink Grant (Downlink Grant).

As an embodiment, the first node N1 and the second node N2 are a base station and a UE, respectively, and the second control information is DCI (Downlink Control Information ) for a Downlink Grant (Downlink Grant).

As an embodiment, the first node N1 and the second node N2 are a UE and a base station, respectively, and the first control information is DCI (Downlink Control Information ) for a Downlink Grant (Downlink Grant).

As an embodiment, the first node N1 and the second node N2 are a UE and a base station, respectively, and the second control information is DCI (Downlink Control Information ) for an uplink Grant (Downlink Grant).

As an embodiment, the DCI for downlink grant includes a field (field) in an LTE (Long Term Evolution ) DCI format 2C.

As an embodiment, the DCI for downlink grant includes all fields in NR (New Radio) DCI format 1_0.

As an embodiment, the DCI for downlink grant includes a partial field in NR DCI format 1_0.

As an embodiment, the DCI for downlink grant includes all domains in NR DCI format 1_1.

As an embodiment, the DCI for downlink grant includes a partial field in NR DCI format 1_1.

As an embodiment, the DCI for the uplink grant includes a field (field) in LTE DCI format 0.

As one embodiment, the DCI for the uplink grant includes all fields in NR DCI format 0_0.

As an embodiment, the DCI for uplink grant includes a partial field in NR DCI format 0_0.

As one embodiment, the DCI for uplink grant includes all fields in NR DCI format 0_1.

As an embodiment, the DCI for uplink grant includes a partial field in NR DCI format 0_1.

As an embodiment, the frequency domain resources occupied by the first wireless signal, the second wireless signal and the third wireless signal all belong to the same carrier.

As an embodiment, the first control signaling is sent on the same carrier.

As an embodiment, the same carrier is deployed with unlicensed spectrum.

As an embodiment, in the step S22, the second node N2 determines whether the second wireless signal is transmitted according to the received power in the second time-frequency resource; if the received power in the second time-frequency resource is greater than a given threshold, the second node N2 determines that the second wireless signal is transmitted; otherwise, the second node N2 determines that the second wireless signal is not transmitted.

As an embodiment, in the step S22, the second node N2 determines that the second wireless signal is transmitted if it is verified by CRC (Cyclic Redundancy Check ) on the assumption that the second wireless signal is transmitted to perform channel decoding on the first bit block; if the CRC validation is not passed, the second node N2 assumes that the second wireless signal is not transmitted.

As an embodiment, in the step S22, the second node N2 determines whether the second wireless signal is transmitted according to whether a feature sequence is detected in the second time-frequency resource; if the characteristic sequence is detected in the second time-frequency resource, the second node N2 judges that the second wireless signal is sent; otherwise, the second node N2 determines that the second wireless signal is not transmitted.

As an embodiment, in the step S23, the second node N2 determines whether the third wireless signal is transmitted according to whether a feature sequence is detected in the third time-frequency resource.

As an embodiment, in the step S23, the second node N2 performs channel decoding on the radio signal received in the third time-frequency resource, and determines whether the third radio signal is transmitted according to whether the channel decoding passes CRC verification.

Example 6

Embodiment 6 illustrates a flow chart of a first snoop of a single snoop, as shown in FIG. 6.

In step S1102, the first node performs energy detection within one delay period (delay duration) of the target frequency band; in step S1103, it is judged whether or not all slot periods within this delay period are idle, and if so, the process proceeds to step S1104 to consider the channel to be idle; if not, proceed to step S1105 where the channel is deemed not to be idle.

As an embodiment, the duration of the delay period is 25 microseconds.

As an embodiment, the duration of the delay period does not exceed 25 microseconds.

As an embodiment, the duration of the delay period is not less than 16 microseconds.

As an embodiment, the duration of the delay period is fixed.

As an embodiment, each of the time slot periods in the delay period is 9 microseconds.

As an embodiment, each of the time slot periods in the delay period does not exceed 9 microseconds.

As an embodiment, each of the time slot periods in the delay period is not less than 4 microseconds.

As an embodiment, the duration of all of the slot periods in the delay period is the same.

As an embodiment, the delay period is divided sequentially from front to back into a positive integer number of the slot periods and a time slice having a duration smaller than the duration of the slot periods.

As one embodiment, the first wireless signal is transmitted on the target frequency band.

As an embodiment, the target frequency band is a BWP (BandWidth Part).

As an embodiment, the target frequency band is a carrier.

As an embodiment, in step S1103, for any slot period within the delay period, if the received power is greater than a specific threshold, the channel in the any slot period is considered not to be idle, and if the received power is not greater than the specific threshold, the channel in the any slot period is considered to be idle.

As an embodiment, in step S1103, for any slot period within the delay period, if the received power is not less than a specific threshold, the channel in the any slot period is considered not to be idle, and if the received power is less than a specific threshold, the channel in the any slot period is considered to be idle.

As an example, the specific threshold is-72 dBm.

As an embodiment, the specific threshold is configurable (i.e. related to downlink signaling).

As an embodiment, the specific threshold is related to a maximum transmit power of the first node.

As an embodiment, the second time-frequency resource belongs to the target frequency band in the frequency domain.

As an embodiment, the second time-frequency resource belongs to the delay period in the time domain.

Example 7

Example 7 illustrates a schematic diagram of a first threshold, as shown in fig. 7.

In embodiment 7, if the magnitude of the increase of the received power of the first node in the first time-frequency resource compared to the reference power is lower than a first threshold, it is determined that the first listening is not required; if the amplitude of the increase of the received power of the first node in the first time-frequency resource compared with the reference power exceeds a first threshold value, judging that the first monitoring is needed; wherein the reference power is a received power of the first node in a reference time-frequency resource.

The reference time domain resource in fig. 7 is a time domain resource occupied by the reference time frequency resource.

As an embodiment, the first candidate time domain resource in fig. 7 is a time domain resource occupied by the first time-frequency resource, that is, the starting time of the reference time-frequency resource is before the starting time of the first time-frequency resource.

As shown in fig. 7, in the above embodiment, the magnitude of the increase of the received power of the first node in the first time-frequency resource compared to the reference power exceeds the first threshold, so that it is determined that the first listening is required.

One advantage of the above embodiment is that: the first candidate time domain resource is closer to the switching point from receiving to transmitting of the first node, so that the amplitude of the increase of the received power in the first time frequency resource compared with the reference power can more accurately indicate whether a new interference source exists.

Another advantage of the above embodiment is that: if the duration of the reference time domain resource is shorter, the reference time domain resource is closer to the switching point where the first node switches from transmitting to receiving, so that the probability that a new interferer exists in the reference time domain resource is low (the transmission of the first node can block the reference time domain resource with a higher probability from being occupied by other interferers), and therefore the first candidate time domain resource does not need to include the reference time domain resource.

As an embodiment, the second candidate time domain resource in fig. 7 is a time domain resource occupied by the first time-frequency resource, that is, the time domain resource occupied by the first time-frequency resource includes a time domain resource occupied by the reference time-frequency resource.

As shown in fig. 7, in the above embodiment, although the magnitude of the increase in the received power of the first node in the first candidate time domain resource compared to the reference power exceeds the first threshold, if the magnitude of the increase in the received power of the first node in the second candidate time domain resource compared to the reference power is lower than the first threshold, the first listening is determined not to be needed.

Another advantage of the above embodiment is that: the method is suitable for scenes with longer duration of reference time domain resources; the transmission of the first node cannot block the reference time domain resource from being occupied by other interference sources.

As an embodiment, the reference time domain resource comprises and only comprises one multicarrier symbol.

As an embodiment, the first candidate time domain resource comprises and only comprises one multicarrier symbol.

As an embodiment, the larger the subcarrier spacing, the smaller the duration of the reference time domain resource.

As one embodiment, the unit of the received power in the first time-frequency resource is a watt, the unit of the reference power is a watt, and the unit of the first threshold is a watt; the magnitude of the increase in the received power in the first time-frequency resource compared to the reference power is equal to the difference of the received power in the first time-frequency resource minus the reference power.

As one embodiment, the unit of the received power within the first time-frequency resource is dBm (milli decibel), the unit of the reference power is dBm, and the unit of the first threshold is dB; the magnitude of the increase in the received power in the first time-frequency resource compared to the reference power is equal to the difference of the received power in the first time-frequency resource minus the reference power.

As an embodiment, if the magnitude of the increase in the received power in the first time-frequency resource compared to the reference power is equal to the first threshold, it is determined that the first listening is not required.

As one embodiment, if the magnitude of the increase in the received power in the first time-frequency resource compared to the reference power is equal to the first threshold, determining that the first listening is required;

as an embodiment, the reference time-frequency resource is the same as the first time-frequency resource in the frequency domain.

As an embodiment, the first time-frequency resource includes Q1 multi-carrier symbols in the time domain, the reference time-frequency resource includes Q2 multi-carrier symbols in the time domain, and Q1 and Q2 are positive integers, respectively.

As one embodiment, Q2 is 1.

As one embodiment, Q1 is greater than 1.

As one embodiment, the Q2 multicarrier symbols are Q2 preceding multicarrier symbols of the Q1 multicarrier symbols.

As an embodiment, the received power in the first time-frequency resource is an average value of Q1 received powers, and the Q1 received powers are the received powers of the first node on the Q1 multicarrier symbols, respectively.

As an embodiment, the received power in the first time-frequency resource is the maximum value of Q1 received powers, and the Q1 received powers are the received powers of the first node on the Q1 multicarrier symbols, respectively.

As an example, example 7 is an implementation of step S12 in example 5 above.

As an example, example 7 is an implementation of step S02 in example 1 described above.

Example 8

Example 8 illustrates a schematic diagram of the second threshold, as shown in fig. 8.

In embodiment 8, if the amplitude of the change of the received power of the first node in the first time-frequency resource is lower than a second threshold, the first node determines that the first listening is not needed; if the amplitude of the change of the received power of the first node in the first time-frequency resource exceeds a second threshold value, the first node judges that the first monitoring is needed.

As an embodiment, if the magnitude of the change in the received power in the first time-frequency resource is equal to the second threshold, it is determined that the first listening is not required.

As an embodiment, if the magnitude of the change in the received power in the first time-frequency resource is equal to the second threshold, it is determined that the first listening is required.

The first time domain resource in fig. 8 is a time domain resource occupied by the first time frequency resource, where the first time domain resource includes and only includes Q1 multi-carrier symbols, and Q1 is a positive integer greater than 1.

As one embodiment, the magnitude of the change in the received power in the first time-frequency resource is equal to the difference obtained by subtracting the minimum value from the maximum value of Q1 received powers; the Q1 received powers are the received powers of the first node on the Q1 multicarrier symbols, respectively.

As an embodiment, the unit of the received power in the first time-frequency resource is a watt, and the unit of the second threshold is a watt; the magnitude of the received power variation within the first time-frequency resource is equal to the difference of the maximum value minus the minimum value of the Q1 received powers.

As one embodiment, the unit of the received power within the first time-frequency resource is dBm (milli decibel), the unit of the reference power is dBm, and the unit of the second threshold is dB; the magnitude of the received power variation within the first time-frequency resource is equal to the difference of the maximum value minus the minimum value of the Q1 received powers.

As an example, example 8 is an implementation of step S12 in example 5 above.

As an example, example 8 is an implementation of step S02 in example 1 above.

Example 9

Embodiment 9 illustrates a flow chart of a first snoop of multiple transactions, as shown in fig. 9.

In step S2102, the first node performs energy detection within one delay period (delay duration) of the target frequency band; in step S2103, it is judged whether or not all slot periods within this delay period are idle, and if so, the process proceeds to step S2104 where the channel is considered to be idle; if not, proceeding to step S2105, performing energy detection for one delay period of the target frequency band; in step S2106, it is judged whether or not all slot periods within the one delay period are idle, and if so, the process proceeds to step S2107 where the first counter is set equal to R1; otherwise, returning to step S2105; in step S2108, it is determined whether the first counter is 0, and if so, the process proceeds to step S2104; if not, proceed to step S2109 to perform energy detection during one additional slot period of the target frequency band; in step S2110 it is determined whether this additional slot period is idle, and if so, it proceeds to step S2111 to decrement the first counter by 1, and then returns to step 2108; if not, go to step S2112 to perform energy detection for an additional delay period of the target frequency band; in step S2113, it is judged whether or not all slot periods within this additional delay period are idle, and if yes, the process proceeds to step S2111, and if no, the process returns to step S2112.

As an embodiment, if the above step S2104 cannot be performed until the start time of the third time-frequency resource, the first node determines that the channel is not idle.

As an embodiment, if the above step S2104 cannot be performed until the expiration time of the second time-frequency resource, the first node determines that the channel is not idle.

As an example, example 9 is an implementation of step S12 in example 5 above.

As an example, example 9 is an implementation of step S02 in example 1 above.

Example 10

Embodiment 10 illustrates a schematic diagram of the first control signaling, as shown in fig. 10.

In embodiment 10, the first control signaling includes a plurality of domains such as a first domain, a second domain, and a third domain; wherein each field has a positive integer number of bits.

As an embodiment, the first control signaling is a DCI.

As an embodiment, the first control signaling is an RRC IE (Information Element, resource element).

As an embodiment, the first control information in the present application is a field in the first control signaling.

As a sub-embodiment of the above embodiment, the first control signaling includes an MCS field, an HARQ process number field, an RV field, and an NDI field corresponding to the first radio signal.

As a sub-embodiment of the above embodiment, the first control signaling includes a time domain resource allocation domain and a frequency domain resource allocation domain corresponding to the first wireless signal.

As an embodiment, the second control information in the present application is a field in the first control signaling.

As a sub-embodiment of the above embodiment, the first control signaling includes an MCS field, an HARQ process number field, an RV field, and an NDI field corresponding to the second radio signal.

As a sub-embodiment of the above embodiment, the first control signaling includes a time domain resource allocation domain and a frequency domain resource allocation domain corresponding to the second wireless signal.

Example 11

Embodiment 11 illustrates a schematic diagram of a first time-frequency resource, as shown in fig. 11. In fig. 11, a small square identifies an RE, a small square filled with oblique lines identifies an RE belonging to the first time-frequency resource, and a small square with a thick line identifies an RE occupied by the reference signal.

In embodiment 11, the time domain resource indicated by the first control information includes 14 OFDM symbols, and the first time-frequency resource occupies one of the OFDM symbols.

As one embodiment, the first control information schedules a combined wireless signal, the combined wireless signal being mapped in the 14 OFDM symbols; wherein the portion mapped into the first time-frequency resource is a first wireless signal.

As an embodiment, one OFDM symbol occupied by the first time-frequency resource is one OFDM symbol with highest received power of the 14 OFDM symbols.

As an embodiment, the one OFDM symbol occupied by the first time-frequency resource is a last OFDM symbol of the 14 OFDM symbols.

Example 12

Embodiment 12 illustrates a schematic diagram of a second time domain resource, as shown in fig. 12.

In embodiment 12, the time domain resource occupied by the first control information, the time domain resource occupied by the first wireless signal, the second time domain resource and the third time domain resource all belong to one gNB channel occupation time (COT, channel Occupation Time); the second time domain resource is a time domain resource occupied by a second time-frequency resource in the application, and the third time domain resource is a time domain resource occupied by a third time-frequency resource in the application; the starting time and the ending time of the second time domain resource are the first time and the second time respectively.

As an embodiment, if the second wireless signal is transmitted in the second time-frequency resource, the starting time and the ending time of the third time-domain resource are a second time and a third time, respectively; if the second wireless signal is not transmitted in the second time-frequency resource, the starting time and the ending time of the third time-domain resource are the second time and the fourth time respectively.

As an embodiment, the starting time and the ending time of the third time domain resource are the second time and the fourth time, respectively, irrespective of whether the second radio signal is transmitted in the second time frequency resource or not.

Example 13

Embodiment 13 illustrates a schematic diagram of a reference time-frequency resource and a first time-frequency resource, as shown in fig. 13.

In embodiment 13, the first time-frequency resource and the reference time-frequency resource occupy the first frequency domain resource and the second frequency domain resource in fig. 13, respectively. The reference time-frequency resource includes a time-frequency resource block #1, a frequency resource block #2 and a frequency resource block #3.

As an embodiment, the first time-frequency resource includes a time-frequency resource block #4.

As an embodiment, the first time-frequency resource includes a time-frequency resource block #4 and a frequency resource block #2.

Example 14

Embodiment 14 illustrates a block diagram of the processing means in the first node, as shown in fig. 14. In embodiment 14, the first node 1400 includes a first receiving module 1401, a first judging module 1402 and a first transmitting module 1403.

In embodiment 14, a first receiving module 1401 receives a first wireless signal within a first time-frequency resource; the first judging module 1402 judges whether a first monitor is required according to the received power in the first time-frequency resource; if it is determined that the first listening is not required, the first transmitting module 1403 transmits a second wireless signal in a second time-frequency resource; if it is determined that the first listening is required, the first transmission module 1403 discards the wireless transmission in the second time-frequency resource and performs the first listening;

in embodiment 14, the first wireless signal is a useful signal for the first node.

As an embodiment, if the magnitude of the increase in the received power in the first time-frequency resource compared to the reference power is lower than a first threshold, the first determining module 1402 determines that the first listening is not required; if the magnitude of the increase in the received power in the first time-frequency resource compared to the reference power exceeds a first threshold, the first determining module 1402 determines that the first listening is required; wherein the reference power is a received power of the first node in a reference time-frequency resource; the starting time of the reference time-frequency resource is before the starting time of the first time-frequency resource, or the time domain resource occupied by the first time-frequency resource comprises the time domain resource occupied by the reference time-frequency resource.

As an embodiment, if the magnitude of the received power variation in the first time-frequency resource is lower than a second threshold, the first determining module 1402 determines that the first listening is not needed; the first determining module 1402 determines that the first listening is required if the magnitude of the received power variation within the first time-frequency resource exceeds a second threshold.

As an embodiment, if the channel is determined to be idle in the first listening, the first transmitting module 1403 transmits a third wireless signal in a third time-frequency resource; if the channel is determined not to be idle in the first listening, the first transmission module 1403 discards the wireless transmission in the third time-frequency resource; wherein the first snoop is determined to be required.

As an embodiment, the first node 1400 is a UE, and the first receiving module 1401 includes { the antenna 452, the receiver 454, the receiving processor 456} in fig. 4.

As an embodiment, the first node 1400 is a UE, and the first receiving module 1401 includes at least one of { the multi-antenna receiving processor 458, the controller/processor 459} in fig. 4.

As an example, the first node 1400 is a UE, and the first determining module 1402 includes { the antenna 452, the receiver 454, the receiving processor 456} in fig. 4.

As an example, the first node 1400 is a UE, and the first determining module 1402 includes the multi-antenna receive processor 458 of fig. 4.

As an embodiment, the first node 1400 is a UE, and the first transmitting module 1403 includes { the antenna 452, the transmitter 454, the transmitting processor 468} in fig. 4.

As an embodiment, the first node 1400 is a UE, and the first transmitting module 1403 includes at least one of { the multi-antenna transmit processor 457, the controller/processor 459} in fig. 4.

As an example, the first node 1400 is a base station, and the first transmitting module 1403 includes the antenna 420 of fig. 4, the transmitter 418, and the transmitting processor 416.

As an example, the first node 1400 is a base station and the first transmitting module 1403 includes the multi-antenna transmit processor 471 and the controller/processor 475 of fig. 4.

As an example, the first node 1400 is a base station, and the first receiving module 1401 includes the antenna 420 in fig. 4, the receiver 418, and the receiving processor 470.

As an example, the first node 1400 is a base station, and the first receiving module 1401 includes the multi-antenna receiving processor 472 and the controller/processor 475 of fig. 4.

Example 15

Embodiment 15 illustrates a block diagram of the processing means in the second node, as shown in fig. 15. In embodiment 15, the second node 1500 includes a second transmitting module 1501 and a second receiving module 1502.

The second transmitting module 1501 transmits a first wireless signal in a first time-frequency resource, wherein a received power in the first time-frequency resource is used to determine whether a first listening is required; the second receiving module 1502 monitors a second wireless signal in a second time-frequency resource;

in embodiment 15, the first wireless signal is a useful signal for the first node; if the first listening is determined not to be needed, the second wireless signal is present in the second time-frequency resource; if the first listening is determined to be required, the second wireless signal is not present in the second time-frequency resource.

As an embodiment, the second node 1500 is a UE, and the second receiving module 1502 includes { the antenna 452, the receiver 454, the receiving processor 456} in fig. 4.

As an embodiment, the second node 1500 is a UE, and the second receiving module 1502 includes at least one of { the multi-antenna receiving processor 458, the controller/processor 459} in fig. 4.

As an embodiment, the second node 1500 is a UE, and the second transmitting module 1501 includes { the antenna 452, the transmitter 454, the transmission processor 468} in fig. 4.

As an embodiment, the second node 1500 is a UE, and the second transmitting module 1501 includes at least one of { the multi-antenna transmit processor 457, the controller/processor 459} in fig. 4.

As an example, the second node 1500 is a base station and the second transmitting module 1501 includes the antenna 420 in fig. 4, the transmitter 418 and the transmitting processor 416.

As an example, the second node 1500 is a base station and the second transmitting module 1501 includes the multi-antenna transmit processor 471 and the controller/processor 475 of fig. 4.

As an example, the second node 1500 is a base station, and the second receiving module 1502 includes the antenna 420 in fig. 4, the receiver 418, and the receiving processor 470.

As an example, the second node 1500 is a base station, and the second receiving module 1502 includes the multi-antenna receiving processor 472 and the controller/processor 475 of fig. 4.

Those of ordinary skill in the art will appreciate that all or a portion of the steps of the above-described methods may be implemented by a program that instructs associated hardware, and the program may be stored on 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 using one or more integrated circuits. Accordingly, each module unit in the above embodiment may be implemented in a hardware form or may be implemented in a software functional module form, and the application is not limited to any specific combination of software and hardware. User equipment, terminals and UEs in the present application include, but are not limited to, unmanned aerial vehicles, communication modules on unmanned aerial vehicles, remote control airplanes, aircraft, mini-planes, mobile phones, tablet computers, notebooks, vehicle-mounted communication devices, wireless sensors, network cards, internet of things terminals, RFID terminals, NB-IOT terminals, MTC (Machine Type Communication ) terminals, eMTC (enhanced MTC) terminals, data cards, network cards, vehicle-mounted communication devices, low cost mobile phones, low cost tablet computers, and the like. The base station 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, a gNB (NR node B), a TRP (Transmitter Receiver Point, transmitting and receiving node), and other wireless communication devices.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the scope of the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application are intended to be included within the scope of the present application.

Claims

1. A method in a first node for wireless communication, comprising:

receiving a first wireless signal within a first time-frequency resource;

wherein the first wireless signal is a useful signal for the first node.

2. The method according to claim 1, characterized in that it comprises:

3. The method according to claim 1, characterized in that it comprises:

4. A method according to any one of claims 1 to 3, comprising:

wherein the first snoop is determined to be required.

5. The method according to any one of claims 1 to 4, comprising:

Operating the first control information;

6. The method of claim 4, wherein a start time of the second time-frequency resource is before a start time of the third time-frequency resource.

7. The method according to any one of claims 1 to 6, comprising:

operating the second control information;

8. The method according to any of claims 1 to 7, wherein the first node is a base station device or the first node is a user equipment.

9. A method in a second node for wireless communication, comprising:

monitoring a second wireless signal within a second time-frequency resource;

10. A first node for wireless communication, comprising:

Wherein the first wireless signal is a useful signal for the first node.

11. A second node for wireless communication, comprising: