CN111416687B

CN111416687B - Method and apparatus in a communication device used for channel sensing

Info

Publication number: CN111416687B
Application number: CN201910007724.1A
Authority: CN
Inventors: 张晓博
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Shanghai Langbo Communication Technology Co Ltd
Priority date: 2019-01-04
Filing date: 2019-01-04
Publication date: 2022-11-01
Anticipated expiration: 2039-01-04
Also published as: CN111416687A

Abstract

A method and apparatus in a communication device used for channel sensing is disclosed. A first node transmits K wireless signals on a first sub-band; receiving K sets of parameters, the K sets of parameters being used to determine whether information blocks generating the K wireless signals are correctly received, respectively; performing channel sensing in Q1 time sub-pools of a first sub-band, respectively; wherein a starting time window occupied by a first wireless signal is a reference time window, a first set of parameters is used to determine whether the first wireless signal is correctly received, only the first set of parameters of the K sets of parameters is used to determine the Q1 time sub-pools; the first radio signal is the closest radio signal of the K radio signals that satisfies a target condition related to a frequency domain resource occupied by the initial transmission of the generated information block. The method and the device increase the channel access probability and improve the utilization rate of frequency spectrum resources.

Description

Method and apparatus in a communication device used for channel sensing

Technical Field

The present application relates to transmission methods and apparatus in wireless communication systems, and more particularly, to channel aware transmission schemes and apparatus.

Background

As a key technology for unlicensed spectrum communication, LBT (Listen Before Talk) is widely adopted. In LAA (Licensed Assisted Access) defined by 3GPP (3 rd Generation Partner Project), the adjustment of CWS (Contention Window Size) depends on HARQ-ACK received in the reference subframe.

In the future, the application scenes of the wireless communication system are more and more diversified, and different application scenes put different performance requirements on the system. In order to meet different performance requirements of various application scenarios, a research on a New air interface technology (NR, new Radio) (or 5G) is decided in #72 congregations of 3gpp ran (Radio Access Network), and standardization Work on the NR is started through a Work Item (WI) of the New air interface technology (NR, new Radio) in 3gpp ran #75 congregations.

In order to be able to adapt to various application scenarios and meet different requirements, a research project of access to Unlicensed Spectrum (Unlicensed Spectrum) under NR is also performed on the 3gpp ran #75 congress, which is expected to be completed in release R15, and then WI is started in release R16 to standardize the related technologies.

Disclosure of Invention

In LTE (Long Term Evolution ) LAA (licensed Assisted Access), an LTE base station (eNB) performs LBT (Listen Before Talk) on an unlicensed frequency domain Before downlink transmission in order to determine that an unlicensed spectrum is available. In the Cat 4LBT (third type LBT, see 3gpp tr36.889), a transmitter (i.e., a base station device in downlink) needs to perform backoff after a certain delay period (Defer Duration), the backoff time is counted by taking a CCA (Clear Channel Assessment) time slot as a unit, and the number of backoff time slots is obtained by randomly selecting the transmitter in a CWS (collision Window Size). The CWS is adjusted based on HARQ feedback in a previous transmission over the unlicensed spectrum.

A plurality of techniques introduced in the 5G NR, such as HARQ (Hybrid Automatic Repeat reQuest) -ACK (acknowledgement) based on Coding Block Group (CBG), narrowband (Narrow Band) LBT, etc., may cause performance degradation of the existing CWS adjustment scheme; therefore, new adjustment methods for CWS need to be designed.

It should be noted that although the present application is primarily directed to unlicensed spectrum communication, the present application is also applicable to communication over licensed spectrum, such as V2V (Vehicle to Vehicle) communication, grant Free (Grant Free) communication, and the like. Further, without conflict, the embodiments and features in the embodiments in the base station apparatus of the present application may be applied to the user equipment, and vice versa. Further, the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without conflict.

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

transmitting K wireless signals in a first time window set on a first sub-frequency band, wherein K is a positive integer, and the first time window set comprises positive integer time windows;

receiving K sets of parameters that are respectively used to determine whether an information block that generated the K wireless signals was received correctly;

respectively performing channel sensing in Q1 time sub-pools of a first sub-band to judge whether a channel is idle, wherein Q1 is a positive integer;

wherein a starting time window occupied by a first radio signal is a reference time window, the first radio signal is one of the K radio signals, and the reference time window belongs to the first set of time windows in a time domain; a first information block is used for generating the first wireless signal, a first set of parameters is used for determining whether the first information block is correctly received, the first set of parameters is one of the K sets of parameters; only the first one of the K sets of parameters is used to determine the Q1 sub-pools of time; the first wireless signal is the latest wireless signal among the K wireless signals, which satisfies a target condition related to a frequency domain resource occupied by the initial transmission of the generated information block corresponding to the wireless signal.

As an example, when a retransmission and an initial transmission of a generated information block occur in a second sub-band and the first sub-band, respectively, a HARQ-ACK associated to the retransmission may implicitly embody interference information on the second sub-band, and thus the HARQ-ACK associated to the retransmission is not used for CWS adjustment. The method can avoid introducing the interference of the frequency domain resources outside the first sub-band into the CWS adjustment of the first sub-band, and keeps the fairness of channel intervention.

Specifically, according to one aspect of the present application, the target condition includes: the frequency domain resources occupied by the initial transmission of at least part of the information bits in the generated information block overlap with the first sub-band.

As an embodiment, the above method ensures that the initial transmission of the generated information block corresponding to the first parameter set can represent the interference level on the first subband, avoids the influence of excessive interference outside the first subband on CWS adjustment, and maintains fairness of channel access.

As an embodiment, the frequency domain resources occupied by the initial transmission of the at least part of the information bits in the generated information block belong to the first subband.

As an embodiment, the target conditions include: the sub-band occupied by any HARQ retransmission in which at least part of the information bits in the generated information block have occurred is the first sub-band.

As an embodiment, the target conditions include: the sub-band occupied by the initial transmission of the generated information block is the first sub-band.

As an embodiment, the target conditions include: the sub-band occupied by any HARQ retransmission of the generated information block that has occurred is the first sub-band.

As an embodiment, the at least part of the information bits in the generated information block includes a CBG.

As one embodiment, the generated information block includes CRC (Cyclic Redundancy Check) bits for the at least part of the information bits in the generated information block.

Specifically, according to one aspect of the present application, the target condition includes: a ratio of REs (Resource elements, resource particles) occupied by the first transmission of the generated information block to the first sub-band exceeds a first threshold, and the first threshold is greater than 0 and not greater than 1.

As an embodiment, a portion of REs occupied by the first transmission of the generated information block is located outside the first sub-band.

As an embodiment, the above method ensures that as many HARQ-ACKs as possible are used for CWS adjustment, improving the accuracy of CWS adjustment.

As an embodiment, the above method ensures that the latest HARQ-ACK is used for CWS adjustment, improving the accuracy of CWS adjustment.

For one embodiment, the first threshold is configurable.

As an embodiment, the first threshold is a constant.

Specifically, according to an aspect of the present application, the method is characterized by comprising the following steps:

if the channel is judged to be idle, a second wireless signal is started to be sent at the first moment on the first sub-frequency band; otherwise, abandoning the wireless transmission at the first time on the first sub-frequency band;

as an embodiment, the first time instant is after the expiration time instant of the Q1 time subpools.

As an example, the first time is associated to a time position of the Q1 time sub-pools.

Specifically, according to one aspect of this application, characterized by, include:

generating a first integer according to the first parameter set;

initializing a first counter to Q2, said Q2 being uniform in distribution probability among all integers between 0 and said first integer;

wherein Q1 is greater than Q2 by 1.

Specifically, according to an aspect of the present application, the channel sensing performed in any one of Q2 time sub-pools includes:

judging whether the first counter is 0 or not; if yes, stopping energy detection; if not, updating the first counter to be minus 1, executing energy detection in any time sub-pool to judge whether any time sub-pool is idle, and if any time sub-pool is considered to be busy, executing energy detection until an extended time sub-pool is considered to be idle;

wherein, in the channel sensing performed in a first temporal sub-pool, a first temporal sub-pool is considered idle, the first temporal sub-pool being an earliest one of the Q1 temporal sub-pools; said Q2 is greater than 0; the Q2 temporal sub-pools are Q1-1 of the Q1 temporal sub-pools except for the first temporal sub-pool.

sending K control signaling in the first time window set on the first sub-band, the K control signaling indicating the frequency domain resources occupied by the K wireless signals from the first frequency band respectively

Wherein the first sub-band belongs to the first frequency band and the first frequency band comprises frequency domain resources outside the first sub-band.

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

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

a first transmitter: transmitting K wireless signals in a first time window set on a first sub-frequency band, wherein K is a positive integer, and the first time window set comprises positive integer time windows;

the first receiver: receiving K sets of parameters, the K sets of parameters being used to determine whether information blocks generating the K wireless signals are correctly received, respectively;

a first processor: respectively performing channel sensing in Q1 time sub-pools of a first sub-band to judge whether a channel is idle, wherein Q1 is a positive integer;

wherein a starting time window occupied by a first radio signal is a reference time window, the first radio signal is one of the K radio signals, and the reference time window belongs to the first set of time windows in a time domain; a first information block is used to generate the first wireless signal, a first set of parameters is used to determine whether the first information block is correctly received, the first set of parameters is one of the K sets of parameters; only the first one of the K sets of parameters is used to determine the Q1 sub-pools of time; the first wireless signal is the latest wireless signal among the K wireless signals, which satisfies a target condition related to a frequency domain resource occupied by the initial transmission of the generated information block corresponding to the wireless signal.

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

-avoiding out-of-band interference affecting CWS adjustment, ensuring fairness of channel access;

-ensuring as much utilization of HARQ-ACK information as possible, improving the accuracy of CWS adjustment;

ensuring that the latest HARQ-ACK is used for CWS adjustment improves the accuracy of CWS adjustment.

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:

fig. 1 shows a flow diagram of wireless transmission according to an embodiment of the application;

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

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

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

FIG. 5 shows a flow diagram of communication between a first node and a second node according to an embodiment of the application;

FIG. 6 illustrates a flow diagram for performing channel sensing to determine whether a channel is idle according to one embodiment of the application;

FIG. 7 illustrates a flow diagram for energy detection in a target time sub-pool according to an embodiment of the present application;

FIG. 8 shows a schematic diagram of a plurality of wireless signals according to an embodiment of the present application;

FIG. 9 shows a schematic diagram of a wireless signal distributed over two sub-bands according to an embodiment of the present application;

FIG. 10 shows a schematic diagram of one of K parameter sets according to an embodiment of the present application;

FIG. 11 shows a schematic diagram of a time sub-pool according to an embodiment of the present application;

FIG. 12 shows a block diagram of a processing device in a first node according to an embodiment of the present application;

FIG. 13 illustrates a flow diagram for determining a first integer according to one embodiment of the present application;

fig. 14 shows a flowchart of determining whether to perform wireless transmission at a first time according to whether a channel is idle according to one embodiment of the present application.

Detailed Description

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

Example 1

Embodiment 1 illustrates a flow chart of wireless transmission, as shown in fig. 1.

In embodiment 1, a first node transmits K wireless signals in a first set of time windows on a first subband in step S100, where K is a positive integer and the first set of time windows includes a positive integer number of time windows; receiving K sets of parameters in step S101, the K sets of parameters being used to determine whether information blocks generating the K wireless signals are correctly received, respectively; in step S102, channel sensing is performed in Q1 time sub-pools of the first sub-band to determine whether the channel is idle, where Q1 is a positive integer.

In embodiment 1, a starting time window occupied by a first wireless signal is a reference time window, the first wireless signal is one of the K wireless signals, and the reference time window belongs to the first time window set in a time domain; a first information block is used to generate the first wireless signal, a first set of parameters is used to determine whether the first information block is correctly received, the first set of parameters is one of the K sets of parameters; only the first one of the K sets of parameters is used to determine the Q1 sub-pools of time; the first wireless signal is a closest wireless signal among the K wireless signals that satisfies a target condition related to a frequency domain resource occupied by a first transmission of a generation information block corresponding to the wireless signal.

As an embodiment, any one of the K parameter sets comprises a positive integer number of bits.

As a sub-embodiment of the above embodiment, each bit of the positive integer number of bits indicates whether a block of information bits is decoded correctly.

As an embodiment, the first set of parameters includes T bit fields, T being a positive integer greater than 1, each of the T bit fields including a positive integer number of bits, only 1 of the T bit fields indicating whether the first information block is correctly decoded.

As an embodiment, the wireless signal associated with at least one of the T bit-fields is transmitted on frequency-domain resources outside the first sub-band.

As an embodiment, K is greater than 1, and time domain resources occupied by any two wireless signals of the K wireless signals are orthogonal.

As an embodiment, K information blocks are used to generate the K wireless signals, respectively; each of the K information blocks includes a Cyclic Redundancy Check (CRC), and the first node determines whether the corresponding information block is correctly received according to the recovered CRC.

As an embodiment, any one of the K parameter sets comprises a positive integer number of HARQ-ACKs.

As a sub-embodiment of the foregoing embodiment, the first node is a UE (User Equipment).

As an embodiment, any one of the K parameter sets includes a positive integer number of NDIs (New Data Indicator).

As a sub-embodiment of the above embodiment, the first node is a base station apparatus.

As a sub-embodiment of the foregoing embodiment, the NDI indicates whether the corresponding generated information block is correctly received in a toggle manner.

As an embodiment, the K wireless signals are all transmitted on a physical layer channel.

For one embodiment, the initial transmission of the generated information block corresponding to the phrase wireless signal includes: a first physical layer channel occupied by an information block for generating the wireless signal, wherein the information block for generating the wireless signal occupies a plurality of physical layer channels, and time domain resources occupied by any two physical layer channels of the plurality of physical layer channels are orthogonal.

As an embodiment, the initial transmission of the generated information block corresponding to the phrase wireless signal refers to HARQ initial transmission of the generated information block corresponding to the wireless signal.

As an embodiment, no HARQ-ACK associated to said one information block is sent by the second node, which is the target recipient of said K radio signals, before the initial transmission of the corresponding generated information block of said radio signal.

As an embodiment, the second node, which is the intended recipient of the K wireless signals, does not send the NDI associated to the one information block prior to the initial transmission of the corresponding generated information block of the wireless signals.

As an embodiment, the first node is a base station apparatus, and the Physical layer Channel is a PDSCH (Physical Downlink Shared Channel).

As an embodiment, the first node is a base station device, and the Physical layer Channel is a short Physical Downlink Shared Channel (sPDSCH).

As an embodiment, the first node is a User Equipment (UE), and the Physical layer Channel is a PUSCH (Physical Uplink Shared Channel).

As an embodiment, the first node is a UE, and the Physical layer Channel is a short Physical Uplink Shared Channel (sPUSCH).

As an embodiment, the first node is a UE, and the Physical layer CHannel is a psch (Physical downlink Shared CHannel).

As an embodiment, for any of said K radio signals, if the first transmission of the corresponding information block occurs

As an embodiment, at least one of the K wireless signals is an HARQ retransmission, and a frequency domain resource occupied by the initial transmission of the information block of the at least one wireless signal is outside the first sub-band.

As an embodiment, the first set of time windows comprises a plurality of time windows, the reference time window being one of the plurality of time windows.

As an embodiment, the time durations of the plurality of time windows are the same.

As an embodiment, there are at least two of the plurality of time windows that are different in duration.

As an embodiment, a duration of any one of the plurality of time windows does not exceed 1 millisecond.

As one embodiment, a duration of any one of the plurality of time windows does not exceed 1 millisecond.

As an embodiment, the reference time window comprises 14 multicarrier symbols.

As an embodiment, the reference time window consists of 14 multicarrier symbols consecutive in the time domain.

As an embodiment, the reference time window consists of 7 multicarrier symbols consecutive in the time domain.

As an embodiment, the multicarrier symbol is an OFDM (Orthogonal Frequency Division Multiplexing) symbol.

As an embodiment, the multicarrier symbol is an SC-FDMA (Single Carrier Frequency Division Multiplexing Access) symbol.

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

As an embodiment, a duration of any one of the plurality of time windows is related to a Sub Carrier Spacing (SCS) corresponding to the first Sub-band.

As an embodiment, at least one of the K wireless signals is an HARQ retransmission, and a frequency domain resource occupied by the initial transmission of the generation information block of the at least one wireless signal is outside the first sub-band.

As an embodiment, only a first wireless signal of the K wireless signals is transmitted in a reference time window.

As an embodiment, at least one of the K wireless signals is transmitted in the reference time window in addition to the first wireless signal.

As one embodiment, the first node does not wirelessly transmit on the first subband in a first set of time windows, except for the K wireless signals.

As one embodiment, the target recipient of the K wireless signals is the second node.

As an embodiment, the K wireless signals are all scrambled by an identity of the second node.

As an embodiment, the K wireless signals all comprise an identity of the second node.

As an embodiment, the identity of the second node is used to generate RS (Reference Signal) sequences of DMRSs (DeModulation Reference signals) of the K wireless signals.

As one embodiment, the identity of the second node is used to generate a CRC (Cyclic Redundancy Check) for the K wireless signals.

As one embodiment, the first node does not wirelessly transmit for the second node on the first subband in a first set of time windows, except for the K wireless signals.

As an embodiment, for each of the K radio signals, the corresponding information Block includes a positive integer number of TBs (Transport blocks), and the corresponding parameter set indicates whether each of the positive integer number of TBs is correctly received.

As an embodiment, any given one of the K wireless signals comprises L wireless sub-signals, L being a positive integer; the information block used to generate any given radio signal includes L information sub-blocks, which are used to generate the L radio sub-signals, respectively.

As an embodiment, each of the L information subblocks includes a positive integer number of bits.

As an embodiment, each of the L information sub-blocks includes a Transport Block (TB).

As an embodiment, each of the L information subblocks includes a CBG (Code Block Group).

As an embodiment, any one of the K wireless signals 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), and wideband symbol Generation (Generation) sequentially performed by a corresponding bit block.

As an embodiment, any one of the K wireless signals is output after channel coding, scrambling, modulation mapper, layer mapper, precoding, resource element mapper, wideband symbol generation by a corresponding bit block.

As an embodiment, any one of the K wireless signals is output after channel coding, scrambling, modulation mapper, resource element mapper, and wideband symbol generation by a corresponding bit block.

As an embodiment, the first information block includes K1 information sub-blocks, the K1 being a positive integer.

As an embodiment, each of the K1 information blocks includes a positive integer number of bits.

As an embodiment, each of the K1 information blocks includes a Transport Block (TB).

As an embodiment, each of the K1 information blocks includes a CBG (Code Block Group).

As an embodiment, said determining that only said first set of parameters of said K sets of parameters of said sentence is used for said Q1 temporal sub-pools comprises: only the first set of parameters of the K sets of parameters is used to determine the Q1.

As an embodiment, said determining that only said first set of parameters of said K sets of parameters of said sentence is used for said Q1 temporal sub-pools comprises: only the first one of the K sets of parameters is used to determine the starting instant of the Q1 sub-pools of time.

As an embodiment, the determining that only the first set of parameters of the K sets of parameters of the sentence is used for the Q1 temporal sub-pools comprises: only the first one of the K sets of parameters is used to determine the starting instant of Q1 and the Q1 sub-pools of time.

As an example, the Q1 time sub-pools are contiguous in the time domain.

As an embodiment, any two of the Q1 time sub-pools do not overlap in time domain.

As an example, K1 is 1.

As an example, K1 is greater than 1.

As an embodiment, the first parameter set includes K1 bit fields, the K1 bit fields respectively indicating whether the K1 information blocks are correctly received, each bit field of the K1 bit fields including a positive integer number of bits.

As an embodiment, each bit field of the K1 bit fields includes K2 bits, each information block of the K1 information blocks includes K2 information sub-blocks, and K2 bits of each bit field of the K1 bit fields respectively indicate whether K2 information sub-blocks of the corresponding information block are correctly received.

As an embodiment, if there is one information block among the K1 information blocks that is not correctly received, the first parameter set indicates NACK; otherwise the first set of parameters indicates ACK.

As an embodiment, the Channel Sensing is based on Energy Detection (Energy Detection).

As an embodiment, the Channel Sensing (Channel Sensing) is based on the detection of signature sequences.

As an embodiment, the Channel Sensing (Channel Sensing) is based on CRC validation.

As an embodiment, the first sub-band is one Carrier (Carrier).

As an embodiment, the first sub-band is a BWP (Bandwidth Part).

As an embodiment, the first sub-band is composed of a positive integer number of subcarriers (subcarriers) consecutive in the frequency domain.

For one embodiment, the bandwidth of the first sub-band is equal to 20MHz.

For one embodiment, the bandwidth of the first sub-band is equal to 10MHz.

As an embodiment, the bandwidth of the first sub-band is equal to 2.16GHz.

As an embodiment, the first subband is composed of frequency domain resources occupied by a positive integer number of PRBs (Physical Resource blocks) in the frequency domain.

As an embodiment, the first subband portion belongs to unlicensed spectrum.

As an embodiment, the reference time window is one time Slot (Slot).

As an embodiment, the reference time window is one small slot (mini-slot).

Example 2

Embodiment 2 illustrates a schematic diagram of a network architecture according to the present application, as shown in fig. 2. Fig. 2 is a diagram illustrating a network architecture 200 of NR 5g, LTE (Long-Term Evolution, long Term Evolution) and LTE-a (Long-Term Evolution Advanced, enhanced Long Term Evolution) systems. The NR 5G or LTE network architecture 200 may be referred to as an EPS (Evolved Packet System) 200. The EPS 200 may include one or more UEs (User Equipment) 201, ng-RANs (next generation radio access networks) 202, epcs (Evolved Packet Core)/5G-CNs (5G-Core Network,5G Core Network) 210, hss (Home Subscriber Server) 220, and internet services 230. The EPS may interconnect with other access networks, but these entities/interfaces are not shown for simplicity. As shown, the EPS provides packet-switched services, however those skilled in the art will readily appreciate that the various concepts presented throughout this application may be extended to networks providing circuit-switched services or other cellular networks. The NG-RAN includes NR node bs (gnbs) 203 and other gnbs 204. The gNB203 provides user and control plane protocol termination towards the UE 201. The gnbs 203 may be connected to other gnbs 204 via an Xn interface (e.g., backhaul). The gNB203 may also be referred to as a base station, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a Basic Service Set (BSS), an Extended Service Set (ESS), a TRP (point of transmission reception), or some other suitable terminology. The gNB203 provides an access point for the UE201 to the EPC/5G-CN210. Examples of the UE201 include a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a Personal Digital Assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a gaming console, a drone, an aircraft, a narrowband physical network device, a machine type communication device, a terrestrial vehicle, an automobile, a wearable device, or any other similar functioning device. UE201 may also be referred to by those skilled in the art as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless communications 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 EPC/5G-CN210 via an S1/NG interface. The EPC/5G-CN210 includes an MME/AMF/UPF211, other MMEs/AMF/UPF 214, an S-GW (Service Gateway) 212, and a P-GW (Packet data Network Gateway) 213.MME/AMF/UPF211 is a control node that handles signaling between UE201 and EPC/5G-CN210. In general, the MME/AMF/UPF211 provides bearer and connection management. All user IP (Internet protocol) packets are transmitted through S-GW212, and S-GW212 itself is connected to P-GW213. The P-GW213 provides UE IP address allocation as well as other functions. The P-GW213 is connected to the internet service 230. The internet service 230 includes an operator-corresponding internet protocol service, and may specifically include the internet, an intranet, an IMS (IP Multimedia Subsystem), and a PS streaming service (PSs).

As an embodiment, the gNB203 corresponds to the first node in this application.

As one embodiment, the gNB203 supports transmissions over unlicensed spectrum.

As an embodiment, the UE201 corresponds to the first node in this application.

As an embodiment, the UE201 supports transmission on unlicensed spectrum.

Example 3

Embodiment 3 shows a schematic diagram of an embodiment of a radio protocol architecture for the user plane and the control plane according to the present application, as shown in fig. 3. Fig. 3 is a schematic diagram illustrating an embodiment of radio protocol architecture for the user plane and the control plane, fig. 3 showing the radio protocol architecture for the User Equipment (UE) and the base station equipment (gNB or eNB) in three layers: layer 1, layer 2 and layer 3. Layer 1 (L1 layer) is the lowest layer and implements various PHY (physical layer) signal processing functions. The L1 layer will be referred to herein as PHY301. Layer 2 (L2 layer) 305 is above 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) 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 upper layers above the L2 layer 305, including a network layer (e.g., IP layer) that terminates at the P-GW on the network side and an application layer that terminates at the other end of the connection (e.g., far end UE, server, etc.). 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. 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 without the header compression function for the control plane. The Control plane also includes a 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 configures the lower layers using RRC signaling between the gNB and the UE.

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

As an embodiment, the K radio signals in this application are generated in the RRC306.

As an example, the K wireless signals in this application are generated in the MAC302.

As an example, the K wireless signals in this application are generated in the PHY301.

As an example, the K parameter sets in this application are generated in the PHY301.

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

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

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

Example 4

Embodiment 4 shows a schematic diagram of a base station device and a given user equipment according to the present application, as shown in fig. 4. Fig. 4 is a block diagram of a gNB410 in communication with a UE450 in an access network.

A controller/processor 440, memory 430, receive processor 412, transmitter/receiver 416, and transmit processor 415 may be included in the base station device (410), with the transmitter/receiver 416 including an antenna 420. The upper layer packets arrive at controller/processor 440, and controller/processor 440 provides packet header compression decompression, encryption decryption, packet segmentation concatenation and reordering, and multiplexing and demultiplexing between logical and transport channels to implement L2 layer protocols for the user plane and control plane. The upper layer packet may include data or control information, such as DL-SCH (DownLink Shared CHannel) or UL-SCH (UpLink Shared CHannel). The transmit processor 415 implements various signal transmit processing functions for the L1 layer (i.e., physical layer) including coding, interleaving, scrambling, modulation, power control/allocation, precoding, and physical layer control signaling (including PBCH (physical broadcast channel), PDCCH (physical downlink control channel), PHICH (physical HARQ indicator channel), reference signal generation, etc. Receive processor 412 performs various signal receive processing functions for the L1 layer (i.e., physical layer) including decoding, deinterleaving, descrambling, demodulation, depredialing, and physical layer control signaling extraction, among others.

Included in the user equipment (UE 450) are a controller/processor 490, a memory 480, a receive processor 452, a transmitter/receiver 456, a transmit processor 455, and a data source 467, the transmitter/receiver 456 including an antenna 460. A data source 467 provides upper layer packets, which may include data or control information such as DL-SCH or UL-SCH, to the controller/processor 490, the controller/processor 490 providing packet header compression decompression, encryption decryption, packet segmentation concatenation and reordering, and demultiplexing of the multiplex between logical and transport channels to implement L2 layer protocols for the user plane and the control plane. The transmit processor 455 implements various signal transmit processing functions for the L1 layer (i.e., physical layer) including coding, interleaving, scrambling, modulation, power control/allocation, precoding, and physical layer control signaling generation, among others.

As an embodiment, the first node in this application is the gNB410.

As a sub-embodiment of the above embodiment, the second node in this application is the UE450.

As a sub-embodiment of the foregoing embodiment, the K parameter sets in this application are K HARQ feedbacks, and the transmission of the K HARQ feedbacks is completed by the transmission processor 455. The receive processor 452 performs various signal receive processing functions for the L1 layer (i.e., physical layer) including decoding, deinterleaving, descrambling, demodulation, depredialing, and physical layer control signaling extraction, among others. The transmitter 456 is configured to convert baseband signals provided from the transmit processor 455 into radio frequency signals and transmit the radio frequency signals via the antenna 460, and the receiver 456 is configured to convert radio frequency signals received via the antenna 460 into baseband signals and provide the baseband signals to the receive processor 452.

As a sub-embodiment of the above embodiment, in DL (Downlink), the upper layer packet DL-SCH includes the K radio signals and the second radio signal in this application, and the upper layer packet DL-SCH is provided to the controller/processor 440. Controller/processor 440 implements the functions of the L2 layer. In the DL, the controller/processor 440 provides packet header compression, ciphering, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation to the UE450 based on various priority metrics. The controller/processor 440 is also responsible for HARQ operations, retransmission of lost packets, and signaling to the UE450. The transmit processor 415 implements various signal processing functions for the L1 layer (i.e., the physical layer). The signal processing functions include decoding and interleaving to facilitate Forward Error Correction (FEC) at the UE450 and modulation of the baseband signal based on various modulation schemes (e.g., binary Phase Shift Keying (BPSK), quadrature Phase Shift Keying (QPSK)), splitting the modulation symbols into parallel streams and mapping each stream to a respective multi-carrier subcarrier and/or multi-carrier symbol, which are then mapped to an antenna 420 by a transmit processor 415 via a transmitter 416 for transmission as a radio frequency signal. On the receive side, each receiver 456 receives a radio frequency signal through its respective antenna 460, and each receiver 456 recovers baseband information modulated onto a radio frequency carrier and provides the baseband information to a receive processor 452. The receive processor 452 implements various signal receive processing functions of the L1 layer. The signal reception processing function includes performing channel sensing in the Q1 time sub-pools, respectively; receiving the K parameter sets in the application; demodulation based on various modulation schemes (e.g., binary Phase Shift Keying (BPSK), quadrature Phase Shift Keying (QPSK)) is performed on the multicarrier symbols in the multicarrier symbol stream, which are then decoded and deinterleaved to recover the data or control transmitted by the gNB410 on the physical channels, which are then provided to the controller/processor 490. The controller/processor 490 implements the L2 layer. The controller/processor can be associated with a memory 480 that stores program codes and data. Memory 480 may be referred to as a computer-readable medium.

As a sub-embodiment of the above embodiment, the receiving of the K parameter sets in this application is performed by the receiving processor 412.

As a sub-embodiment of the above-described embodiment, the gNB410 apparatus 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 apparatus at least: transmitting K wireless signals in a first time window set on a first sub-frequency band, wherein K is a positive integer, and the first time window set comprises positive integer time windows; receiving K sets of parameters, the K sets of parameters being used to determine whether information blocks generating the K wireless signals are correctly received, respectively; respectively performing channel sensing in Q1 time sub-pools of a first sub-band to judge whether a channel is idle, wherein Q1 is a positive integer; wherein a starting time window occupied by a first wireless signal is a reference time window, the first wireless signal is one of the K wireless signals, and the reference time window belongs to the first time window set in a time domain; a first information block is used to generate the first wireless signal, a first set of parameters is used to determine whether the first information block is correctly received, the first set of parameters is one of the K sets of parameters; only the first one of the K sets of parameters is used to determine the Q1 sub-pools of time; the first wireless signal is the latest wireless signal among the K wireless signals, which satisfies a target condition related to a frequency domain resource occupied by the initial transmission of the generated information block corresponding to the wireless signal.

As a sub-embodiment of the above embodiment, the gNB410 includes: a memory storing a program of computer readable instructions that when executed by at least one processor result in actions comprising: transmitting K wireless signals in a first time window set on a first sub-frequency band, wherein K is a positive integer, and the first time window set comprises positive integer time windows; receiving K sets of parameters, the K sets of parameters being used to determine whether information blocks generating the K wireless signals are correctly received, respectively; respectively performing channel sensing in Q1 time sub-pools of a first sub-band to judge whether a channel is idle, wherein Q1 is a positive integer; wherein a starting time window occupied by a first wireless signal is a reference time window, the first wireless signal is one of the K wireless signals, and the reference time window belongs to the first time window set in a time domain; a first information block is used for generating the first wireless signal, a first set of parameters is used for determining whether the first information block is correctly received, the first set of parameters is one of the K sets of parameters; only the first one of the K sets of parameters is used to determine the Q1 sub-pools of time; the first wireless signal is the latest wireless signal among the K wireless signals, which satisfies a target condition related to a frequency domain resource occupied by the initial transmission of the generated information block corresponding to the wireless signal.

As a sub-embodiment of the above embodiment, the transmitter 416 (including the antenna 420), the transmit processor 415, and the controller/processor 440 are used to transmit the K wireless signals in this application.

As a sub-embodiment of the above embodiment, the transmitter 416 (including the antenna 420), the transmit processor 415, and the controller/processor 440 are used to transmit the second wireless signal in this application.

As a sub-embodiment of the above embodiment, the receiver 416 (including the antenna 420) and the receive processor 412 are used to receive the K1 HARQ feedbacks in this application.

As a sub-embodiment of the above, the receiver 416 (including the antenna 420), the receive processor 412, and the controller/processor 440 are used to perform channel sensing in each of the Q1 time sub-pools of the first sub-band.

As an embodiment, the first node in this application is the UE450.

As a sub-embodiment of the foregoing embodiment, the second node in this application is the gNB410.

As a sub-embodiment of the foregoing embodiment, the K parameter sets in the present application are K NDIs, and the transmission of the K NDIs is completed by the transmission processor 415. Receive processor 412 performs various signal receive processing functions for the L1 layer (i.e., physical layer) including decoding, deinterleaving, descrambling, demodulation, depredialing, and physical layer control signaling extraction, among others. The transmitter 416 is configured to convert the baseband signal provided by the transmit processor 455 into a radio frequency signal and transmit the radio frequency signal via the antenna 420, and the receiver 416 is configured to convert the radio frequency signal received by the antenna 420 into a baseband signal and provide the baseband signal to the receive processor 412.

As a sub-embodiment of the above embodiment, in UL (Uplink, downlink), the upper layer packet UL-SCH includes the K wireless signals and the second wireless signal in this application, and the upper layer packet UL-SCH is provided to the controller/processor 490. The controller/processor 490 performs the functions of the L2 layer. In the UL, the controller/processor 490 provides packet header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels; the controller/processor 490 is also responsible for HARQ operations, retransmission of lost packets. The transmit processor 455 implements various signal processing functions for the L1 layer (i.e., physical layer). The signal processing functions include decoding and interleaving to facilitate Forward Error Correction (FEC) at the gNB410 and modulation of the baseband signal based on various modulation schemes (e.g., binary Phase Shift Keying (BPSK), quadrature Phase Shift Keying (QPSK)), splitting the modulation symbols into parallel streams and mapping each stream to a respective multi-carrier subcarrier and/or multi-carrier symbol, which are then mapped to an antenna 460 by a transmit processor 455 via a transmitter 456 for transmission as a radio frequency signal. On the receiving end, controller/processor 440 allocates radio resources to UE450 and signals to UE450 based on various priority metrics; each receiver 416 receives a radio frequency signal through its respective antenna 420, each receiver 416 recovers baseband information modulated onto a radio frequency carrier, and provides the baseband information to the receive processor 412. The receive processor 412 implements various signal receive processing functions of the L1 layer. The signal reception processing function includes performing channel sensing in the Q1 time sub-pools, respectively; receiving the K parameter sets in the application; demodulation based on various modulation schemes (e.g., binary Phase Shift Keying (BPSK), quadrature Phase Shift Keying (QPSK)) is performed on the multicarrier symbols in the multicarrier symbol stream, followed by decoding and deinterleaving to recover the data or control transmitted by the UE450 on the physical channel, which is then provided to a controller/processor 440. Controller/processor 440 implements the L2 layer. The controller/processor can be associated with a memory 430 that stores program codes and data. The memory 430 may be referred to as a computer-readable medium.

As a sub-embodiment of the above embodiment, the receiving of the K parameter sets in this application is performed by the receiving processor 452.

As a sub-embodiment of the above-mentioned embodiments, the UE450 apparatus 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: transmitting K wireless signals in a first time window set on a first sub-frequency band, wherein K is a positive integer, and the first time window set comprises positive integer time windows; receiving K sets of parameters, the K sets of parameters being used to determine whether information blocks generating the K wireless signals are correctly received, respectively; respectively performing channel sensing in Q1 time sub-pools of a first sub-band to judge whether a channel is idle, wherein Q1 is a positive integer; wherein a starting time window occupied by a first wireless signal is a reference time window, the first wireless signal is one of the K wireless signals, and the reference time window belongs to the first time window set in a time domain; a first information block is used for generating the first wireless signal, a first set of parameters is used for determining whether the first information block is correctly received, the first set of parameters is one of the K sets of parameters; only the first one of the K sets of parameters is used to determine the Q1 sub-pools of time; the first wireless signal is the latest wireless signal among the K wireless signals, which satisfies a target condition related to a frequency domain resource occupied by the initial transmission of the generated information block corresponding to the wireless signal.

As a sub-embodiment of the above-mentioned embodiments, the UE450 includes: a memory storing a program of computer readable instructions that when executed by at least one processor result in actions comprising: transmitting K wireless signals in a first time window set on a first sub-frequency band, wherein K is a positive integer, and the first time window set comprises positive integer time windows; receiving K sets of parameters that are respectively used to determine whether an information block that generated the K wireless signals was received correctly; respectively performing channel sensing in Q1 time sub-pools of a first sub-band to judge whether a channel is idle, wherein Q1 is a positive integer; wherein a starting time window occupied by a first wireless signal is a reference time window, the first wireless signal is one of the K wireless signals, and the reference time window belongs to the first time window set in a time domain; a first information block is used for generating the first wireless signal, a first set of parameters is used for determining whether the first information block is correctly received, the first set of parameters is one of the K sets of parameters; only the first one of the K sets of parameters is used to determine the Q1 sub-pools of time; the first wireless signal is a closest wireless signal among the K wireless signals that satisfies a target condition related to a frequency domain resource occupied by a first transmission of a generation information block corresponding to the wireless signal.

As a sub-embodiment of the above embodiment, the transmitter 456 (including the antenna 460), the transmit processor 455, and the controller/processor 490 are used to transmit the K wireless signals in this application.

As a sub-embodiment of the above embodiment, the transmitter 456 (including the antenna 460), the transmit processor 455, and the controller/processor 490 are used to transmit the second wireless signal in this application.

As a sub-embodiment of the above embodiment, the receiver 456 (including the antenna 460) and the receive processor 452 are used to receive the K1 HARQ feedbacks in this application.

As a sub-embodiment of the above, receiver 456 (including antenna 460), receive processor 452, and controller/processor 490 are used to perform channel sensing in each of the Q1 time sub-pools for the first sub-band.

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. 5, the step in block F1 is optional.

For theFirst node N1In step S10, K control signaling are sent in a first time window set on a first frequency sub-band, where the K control signaling respectively indicate frequency domain resources occupied by K wireless signals from the first frequency band, and K is a positive integer; transmitting the K wireless signals in the first set of time windows on the first subband in step S11, the first set of time windows including a positive integer number of time windows; k sets of parameters are received in step S12,the K sets of parameters are used to determine whether information blocks generating the K wireless signals are correctly received, respectively; respectively performing channel sensing in Q1 time sub-pools of the first sub-band in step S13 to judge whether the channel is idle, wherein Q1 is a positive integer;

in embodiment 5, a starting time window occupied by a first wireless signal is a reference time window, the first wireless signal is one of the K wireless signals, and the reference time window belongs to the first set of time windows in a time domain; a first information block is used for generating the first wireless signal, a first set of parameters is used for determining whether the first information block is correctly received, the first set of parameters is one of the K sets of parameters; only the first one of the K sets of parameters is used to determine the Q1 sub-pools of time; the first wireless signal is the latest wireless signal among the K wireless signals, which satisfies a target condition related to a frequency domain resource occupied by the initial transmission of the generated information block corresponding to the wireless signal. The first frequency sub-band belongs to the first frequency band, and the first frequency band includes frequency domain resources outside the first frequency sub-band.

As one embodiment, the first frequency band includes a plurality of sub-bands, and the first sub-band is one of the plurality of sub-bands.

As an embodiment, there is no one subcarrier belonging to any two of the plurality of subbands at the same time.

As an embodiment, the plurality of sub-bands correspond to the same sub-carrier spacing.

As an embodiment, the first Band is a BWP (Band Width Part).

As an embodiment, the first frequency band is one carrier.

As an embodiment, the first frequency band is composed of a plurality of consecutive subcarriers, and the first frequency band is composed of a plurality of consecutive subcarriers.

As one embodiment, the bandwidth of the first sub-band is the smallest frequency domain unit in which LBT is performed.

As an embodiment, the bandwidth of the first sub-band is 20MHz (megahertz).

As an embodiment, the K Control signaling is K pieces of DCI (Downlink Control Information), respectively.

As an embodiment, the K Control signaling is sent on a PDCCH (Physical Downlink Control CHannel), the first node N1 is a base station device, and the second node N2 is a user equipment.

As an embodiment, the K wireless signals are transmitted on PDSCH, the first node N1 is a base station device, and the second node N2 is a user equipment.

As an embodiment, the K Control signaling is sent on a PUCCH (Physical Uplink Control CHannel), the first node is a user equipment, and the second node N2 is a base station device.

As an embodiment, the K wireless signals are transmitted on a PUSCH, the first node is a user equipment, and the second node N2 is a base station apparatus.

As one embodiment, the first node does not perform channel sensing on the first subband in the first time window.

As an embodiment, the first time window belongs to a COT (channel occupancy time) of the first node on the first frequency band.

As an embodiment, the duration of the first time window does not exceed MCOT (Maximum COT).

As an embodiment, the target conditions include: the frequency domain resources occupied by the initial transmission of at least part of the information bits in the generated information block overlap with the first sub-band.

As an embodiment, the generated information block includes a TB (transport block), and the at least part of the information bits in the generated information block includes a CBG.

As an embodiment, the target conditions include: the frequency domain resources occupied by the initial transmission of all information bits in the generated information block overlap with the first sub-band.

As an embodiment, the target conditions include: the frequency domain resources occupied by any one transmission of at least part of the information bits in the generated information block before the reference time window are overlapped with the first sub-frequency band.

As an embodiment, the target conditions include: and the proportion of resource particles occupied by the primary transmission of the generated information block in the first sub-frequency band exceeds a first threshold, and the first threshold is greater than 0 and not greater than 1.

As one embodiment, the first threshold is 0.8.

As an embodiment, the first threshold is 0.5.

As an embodiment, the first node N1 is a base station device, the second node N2 is a user equipment, and the first node N1 is a maintaining base station of a serving cell of the second node N2.

As an embodiment, the first node N1 is a user equipment, the second node N2 is a base station equipment, and the second node N2 is a maintaining base station of a serving cell of the first node N1.

Example 6

Embodiment 6 illustrates a flow chart for performing channel sensing to determine whether a channel is idle, as shown in fig. 6.

The first node generates a first integer according to the first parameter set in step S61; initializing a first counter to Q2 in step S62, said Q2 being uniformly distributed across all integers between 0 and said first integer, said Q1 in this application being 1 greater than said Q2; in step S63, performing channel sensing in an extended time sub-pool, determining whether the extended time sub-pool is idle, and if not, continuing to perform channel sensing in an extended time sub-pool until an idle extended time sub-pool is found; if yes, judging whether the first counter is 0 or not in step S64; if the judgment in step S64 is yes, the channel is judged to be idle in step S66; if the determination result in step S64 is negative, updating the first counter to be minus 1 in step S65 (i.e. the value of the updated first counter = the value of the first counter before updating-1), and performing energy detection in one time sub-pool to determine whether the one time sub-pool is free; if the judgment result in the step S65 is yes, jumping to the step S64; if the judgment result in the step S65 is negative, jumping to the step S63, namely, performing energy detection until an extended time sub-pool is considered to be idle;

in embodiment 6, in the channel sensing performed in a first temporal sub-pool, the first temporal sub-pool is considered to be free, the first temporal sub-pool being an earliest one of the Q1 temporal sub-pools; said Q2 is greater than 0; the Q2 temporal sub-pools are Q1-1 of the Q1 temporal sub-pools except the first temporal sub-pool.

As one embodiment, a random number generator is used to initialize the first counter as Q2.

As an embodiment, the first node sequentially initializes the first counter to 0, 1, 2.

As an embodiment, the channel sensing comprises energy detection.

As one embodiment, the channel sensing includes coherent detection of a signature sequence.

As one embodiment, the channel sensing includes non-coherent detection of signature sequences.

As an embodiment, the duration of the extended time sub-pool is greater than the duration of any of the Q2 time sub-pools in the present application.

As an example, Q2 is greater than 1, and the durations of Q2 time subpools in this application are all the same.

As an embodiment, the duration of the extended time sub-pool is related to the subcarrier spacing of the first subband.

As an embodiment, a duration of any one of the Q2 time sub-pools is related to a subcarrier spacing of the first subband.

As an embodiment, the duration of the extended time sub-pool is equal to the duration of any of the Q2 time sub-pools in the present application.

As an embodiment, the extended time sub-pool has a duration of no more than 16 microseconds and any one of the Q2 time sub-pools has a duration of no more than 9 microseconds.

As an embodiment, the subcarrier spacing of the first sub-band is 15 kHz; the extended time sub-pool is 16 microseconds in duration and any one of the Q2 time sub-pools is 9 microseconds in duration.

As an example, the Q2 Time sub-pools are Back-off times (Back-off Times) in the LBT of Cat 4.

As an embodiment, the Q2 Time sub-pools are CCA (Clear Channel Assessment) slots respectively included in a Back-off Time (Back-off Time) in LBT of Cat 4.

As an embodiment, the Q2 time sub-pools include CCA slots in the last delay period.

As an embodiment, the first node determines that the channel is busy if the first node cannot determine that the channel is idle until the first time.

For one embodiment, the first node determines that the channel is busy if the first node cannot determine that the channel is idle in the second time window.

As an embodiment, the first time instant is configured by higher layer signaling.

As an embodiment, the first time instant is configured by physical layer signaling.

As an embodiment, the duration of the second time window is configurable.

As an embodiment, the first time instant is after the expiration time instant of the Q1 time sub-pools.

Example 7

Example 7 illustrates a flow chart for energy detection in a target time sub-pool, as shown in fig. 7.

The first node performs Energy Detection (Energy Detection) in one time slice in the target time sub-pool in step S701; determining whether the detected energy is less than a specific threshold in step S702; if yes, in step S703, it is determined that the time slice is idle; if not, it is determined in step S704 that the one time slice is busy.

As an example, the unit of the specific threshold is dBm (decibels).

As one example, the unit of the specific threshold is mW (milliwatt).

As an embodiment, the specific threshold value is related to a transmission power of the second wireless signal.

As one embodiment, the particular threshold is configurable.

As one embodiment, the specific threshold is a constant.

As an embodiment, the target time sub-pool comprises a plurality of consecutive time slices; the steps of fig. 7 are performed in each of the plurality of consecutive time slices; the target time sub-pool is considered to be free if all of the plurality of consecutive time slices are considered to be free, otherwise the target time sub-pool is considered to be busy.

As a sub-embodiment of the foregoing embodiment, the target time sub-pool is a first time sub-pool in the Q1 time sub-pools in this application.

As a sub-embodiment of the foregoing embodiment, the target time sub-pool is any one of the Q1 time sub-pools in the present application.

As a sub-embodiment of the foregoing embodiment, the target time sub-pool is the extended time sub-pool in this application.

As a sub-embodiment of the foregoing embodiment, the target time sub-pool is the first time sub-pool in this application.

As a sub-embodiment of the above embodiment, the duration of the target time sub-pool is 16 microseconds.

As a sub-embodiment of the above embodiment, the duration of the target time sub-pool is 9 microseconds.

As a sub-embodiment of the above embodiment, the duration of the time slice is 4 microseconds.

As an embodiment, the duration of the target time sub-pool exceeds the duration of one time slice; the steps of FIG. 7 are performed separately in each of at least one time slice in the target sub-pool of time; the target time sub-pool is considered to be free if each of the at least one time slice is considered to be free, otherwise the target time sub-pool is considered to be busy.

As a sub-embodiment of the foregoing embodiment, the target time sub-pool is any one of the Q2 time sub-pools in this application.

As one embodiment, the energy detection includes monitoring a received power.

As an embodiment, the energy detection conforms to the approach defined in section 15 of 3gpp ts 36.213.

As an embodiment, the energy detection is an energy detection in LBT (Listen Before transmit).

As an embodiment, the energy detection is implemented by an energy detection manner in WiFi.

As an embodiment, the energy detection comprises RSSI (Received Signal Strength Indication) measurements.

As an example, the detection result of the energy detection has a unit of dBm (decibel).

As one example, the detection result of the energy detection is in units of milliwatts.

As one example, the unit of the detection result of the energy detection is joule.

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

Example 8

Example 8 illustrates a schematic diagram of a plurality of wireless signals, as shown in fig. 8. In fig. 8, each wireless signal occupies multiple REs (Resource elements).

In embodiment 8, the first frequency band includes W sub-bands, i.e., the first sub-band, the second sub-band, the W sub-band in fig. 8, where W is a positive integer greater than 1; the first node transmits K wireless signals, namely a wireless signal #1, a wireless signal #2, a wireless signal #3 and a wireless signal #4, in a first set of time windows on a first sub-band, where K is 4; the four transport blocks are used to generate a radio signal #1, a radio signal #2, a radio signal #3, and a radio signal #4, respectively.

As an example, the wireless signal # a, the wireless signal # c, the wireless signal # d, and the wireless signal # b are HARQ initial transmissions corresponding to the wireless signal #1, the wireless signal #2, the wireless signal #3, and the wireless signal #4, respectively; wherein the radio signal # c and the radio signal # b are not transmitted on the first sub-band, i.e. do not satisfy the target condition, and therefore neither the radio signal #2 nor the radio signal #4 satisfies the target condition that the frequency domain resources occupied by the first transmission of the generated information block corresponding to the radio signal are derived from the first sub-band; the wireless signal # a and the wireless signal # c are transmitted on the first sub-band, so the wireless signal #1 and the wireless signal #3 satisfy a target condition that "the frequency domain resource occupied by the first transmission of the generation information block corresponding to the wireless signal belongs to the first sub-band", wherein the time window occupied by the wireless signal # c is the latest one in the first time window set, which satisfies the target condition; the first radio signal in this application is the radio signal #3 and the reference time window in this application is the time window occupied by the radio signal # 3.

As an embodiment, the wireless signal # a corresponds to the HARQ initial transmission of the wireless signal #1, and the wireless signal # d, the wireless signal # b and the wireless signal #4 are the HARQ initial transmission, the second HARQ transmission and the third HARQ transmission of the same bit block, respectively; neither of the HARQ primary transmissions for radio signal #2 nor radio signal #3 is on the first subband. None of radio signal #2, radio signal #3 and radio signal #4 satisfies the target condition that the frequency domain resources occupied by all HARQ transmissions (including initial transmissions) that have occurred to generate an information block corresponding to the radio signal are derived from the first sub-band, and thus the first radio signal in this application is the radio signal #1, and the reference time window in this application is the time window occupied by the radio signal # 1.

As an embodiment, any one of the radio signal #1, the radio signal #2, the radio signal #3, and the radio signal #4 is transmitted in the same Slot (Slot) with an associated set of parameters.

As an embodiment, the HARQ retransmission uses CC (Chase Combining), i.e. the HARQ retransmission and the HARQ initial transmission carry the same coded bits (coded bits).

As an embodiment, the HARQ retransmission adopts IR (Incremental Redundancy), that is, the HARQ retransmission and the HARQ initial transmission can correspond to different RVs (Redundancy Version).

Example 9

Embodiment 9 illustrates a schematic diagram of a wireless signal distributed on two sub-bands, as shown in fig. 9.

In embodiment 9, the wireless signal corresponding to the first transmission of the generated information block includes a first wireless sub-signal and a second wireless sub-signal; the first and second wireless sub-signals are transmitted on first and second sub-bands, respectively.

As an embodiment, the first wireless sub-signal and the second wireless sub-signal occupy X1 REs and X2 REs, respectively, and the target condition in this application includes that X1/(X1 + X2) exceeds a first threshold, and the first threshold is greater than 0 and not greater than 1.

As one embodiment, the first threshold is 0.8.

Example 10

Example 10 illustrates a schematic diagram of one of K parameter sets, as shown in fig. 10.

In example 10, a parameter set includes s bit fields, i.e., bit field #1, bit field #2,. And bit field # s; the s is a positive integer, each of the s bit fields comprising a positive integer number of bits; if s is 1, the one parameter set consists of bit field # 1.

As an embodiment, one of the K wireless signals corresponding to the one parameter set includes s wireless sub-signals, and the s bit fields respectively indicate whether the s wireless sub-signals are correctly received.

As an embodiment, the s wireless sub-signals respectively comprise s CBGs.

As an embodiment, the s radio sub-signals respectively comprise s TBs.

As an embodiment, the s bit fields respectively indicate whether s wireless signals are correctly received; one of the K wireless signals corresponding to the one parameter set is one of the s wireless signals.

As an embodiment, the s radio signals are transmitted on s serving cells, respectively.

As an embodiment, the s radio signals are transmitted on s carriers, respectively.

As an embodiment, the s wireless signals are transmitted on s BWPs, respectively.

As an embodiment, each bit in the s bit field is a HARQ-ACK.

As an embodiment, each bit in the s bit fields is an NDI.

Example 11

Example 11 illustrates a schematic diagram of a time sub-pool, as shown in fig. 11. In fig. 11, a box marked by a bold line represents a time sub-pool, and a box filled with a horizontal line represents a time slice. The one time sub-pool includes a plurality of time slices.

As an embodiment, the duration of said one time sub-pool is not divisible by the duration of said time slices, i.e. said one time sub-pool cannot be exactly divided into positive integer number of time slices.

As an embodiment, the one time sub-pool is any one of the Q1 time sub-pools in the present application.

As an example, the duration of the one time sub-pool is 16 microseconds.

As an example, the duration of the one time sub-pool is 9 microseconds.

As an example, the duration of the one time slice is 4 microseconds.

Example 12

Embodiment 12 is a block diagram illustrating a configuration of a processing device in a first node, as shown in fig. 12. In fig. 12, the processing means 1200 in the first power saving consists essentially of a first transmitter 1201, a first receiver 1202 and a first processor 1203.

A first transmitter 1201 transmits K wireless signals in a first time window set on a first subband, where K is a positive integer and the first time window set includes positive integer number of time windows; first receiver 1202 receives K sets of parameters that are used to determine whether information blocks that generate the K wireless signals, respectively, were received correctly; the first processor 1203 respectively performs channel sensing in Q1 time sub-pools of the first sub-band to determine whether a channel is idle, where Q1 is a positive integer;

in embodiment 12, a starting time window occupied by a first wireless signal is a reference time window, the first wireless signal is one of the K wireless signals, and the reference time window belongs to the first set of time windows in a time domain; a first information block is used for generating the first wireless signal, a first set of parameters is used for determining whether the first information block is correctly received, the first set of parameters is one of the K sets of parameters; only the first one of the K sets of parameters is used to determine the Q1 sub-pools of time; the first wireless signal is the latest wireless signal among the K wireless signals, which satisfies a target condition related to a frequency domain resource occupied by the initial transmission of the generated information block corresponding to the wireless signal.

As an embodiment, the target conditions include: and the proportion of resource particles occupied by the primary transmission of the generated information block in the first sub-frequency band exceeds a second threshold, and the second threshold is greater than 0 and not greater than 1.

As an embodiment, if the channel is determined to be idle, the first transmitter 1201 transmits the second wireless signal at the first time on the first sub-band; otherwise, the first transmitter 1201 abandons the wireless transmission at the first time instant on the first sub-band.

As an embodiment, the first processor 1203 generates a first integer according to the first parameter set; initializing a first counter to Q2, said Q2 being uniform in distribution probability among all integers between 0 and said first integer; wherein Q1 is greater than Q2 by 1.

As an embodiment, the channel sensing performed in any one of Q2 time sub-pools comprises:

wherein, in the channel sensing performed in a first temporal sub-pool, the first temporal sub-pool is considered idle, the first temporal sub-pool being an earliest one of the Q1 temporal sub-pools; said Q2 is greater than 0; the Q2 temporal sub-pools are Q1-1 of the Q1 temporal sub-pools except the first temporal sub-pool.

As an embodiment, the first transmitter 1201 sends K control signaling in the first time window set on the first frequency sub-band, where the K control signaling indicates frequency domain resources occupied by the K wireless signals from the first frequency band, respectively; wherein the first sub-band belongs to the first frequency band, and the first frequency band includes frequency domain resources outside the first sub-band.

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

As a sub-embodiment of the foregoing embodiment, the transmission channel corresponding to the K wireless signals is a DL-SCH.

As a sub-embodiment of the above embodiment, the K parameter sets are transmitted on the PUCCH.

As a sub-embodiment of the above embodiment, each of the K parameter sets comprises HARQ-ACK.

As a sub-embodiment of the above embodiment, the first transmitter 1201 includes the transmitter 416 (including the antenna 420), the transmit processor 415, and the controller/processor 440 of fig. 4.

As a sub-embodiment of the above-described embodiment, the first receiver 1202 includes the receiver 416 (including the antenna 420) and the receive processor 412 of fig. 4 of the present application.

As a sub-embodiment of the above embodiment, the first receiver 1202 includes the controller/processor 440 of fig. 4 of the present application.

As a sub-embodiment of the foregoing embodiment, the first processor 1203 includes the receiver 416 (including the antenna 420) and the receiving processor 412 in fig. 4 of the present application.

As a sub-embodiment of the foregoing embodiment, the first processor 1203 includes the controller/processor 440 in fig. 4 of the present application.

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

As a sub-embodiment of the foregoing embodiment, the transmission channels corresponding to the K wireless signals are UL-SCH.

As a sub-embodiment of the above embodiment, the K parameter sets are transmitted on the PDCCH.

As a sub-embodiment of the above embodiment, each of the K parameter sets includes an NDI.

As an embodiment, the duration of the first time sub-pool is greater than the duration of any of the Q2 time sub-pools.

As an example, Q2 is greater than 1, and the Q2 time sub-pools are all the same duration.

As one embodiment, the channel sensing includes energy detection.

As an embodiment, the determining that only the first set of parameters of the K sets of parameters of the sentence is used for the Q1 temporal sub-pools comprises: only the first set of parameters of the K sets of parameters is used to determine the Q1.

As an embodiment, the determining that only the first set of parameters of the K sets of parameters of the sentence is used for the Q1 temporal sub-pools comprises: only the first set of parameters of the K sets of parameters is used to determine Q2, the Q1 being 1 greater than the Q2.

As an embodiment, said determining that only said first set of parameters of said K sets of parameters of said sentence is used for said Q1 temporal sub-pools comprises: said Q1 is independent of ones of said K parameter sets other than said first parameter set; the Q1 is related to whether a ratio of HARQ-NACK in the first set of parameters exceeds a second threshold.

As a sub-embodiment of the above embodiment, the first transmitter 1201 includes the transmitter 456 (including the antenna 460), the transmission processor 455, and the controller/processor 490 of fig. 4.

As a sub-embodiment of the above embodiment, the first receiver 1202 includes the receiver 456 (including the antenna 460) and the receiving processor 452 in fig. 4 of the present application.

As a sub-embodiment of the above embodiment, the first receiver 1202 includes the controller/processor 490 of fig. 4 of the present application.

As a sub-embodiment of the foregoing embodiment, the first processor 1203 includes the receiver 456 (including the antenna 460) and the receiving processor 452 in fig. 4 of the present application.

As a sub-embodiment of the above embodiment, the first processor 1203 includes the controller/processor 490 of fig. 4 of the present application.

Example 13

Embodiment 13 illustrates a flow chart for determining the first integer, as shown in fig. 13.

The first node determines in step S1301 whether the NACK proportion in the target parameter set is not less than a second threshold; if the judgment result in the step S1301 is negative, jumping to step S1305, that is, adjusting the first integer to be the allowed minimum value; if the judgment result of the step S1301 is yes, in step S1302, judging whether the first integer is smaller than the allowed maximum value; if the determination result in step S1302 is yes, in step S1303, the first integer is adjusted to a next allowable higher value; if the determination result in the step S1302 is negative, the first integer is maintained unchanged in step S1304.

As an embodiment, higher layer signaling is used to configure a set of integers consisting of allowed values.

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

As one embodiment, the second threshold is 0.8.

As an embodiment, the allowed value of the first integer is related to a Channel Access Priority Class (Channel Access Priority Class).

As an example, if the channel access priority level is 1, the allowed values include 3 and 7.

As an example, if the channel access priority level is 2, the allowed values include 7 and 15.

As an example, if the channel access priority level is 3, the allowed values include 15, 31, and 15.

As an example, if the channel access priority level is 4, the allowed values include 15, 31, 63, 127, 255, 511, and 1023.

Example 14

Embodiment 14 illustrates a flowchart of determining whether to perform wireless transmission at a first time according to whether a channel is idle, as shown in fig. 14.

The first node determines whether the channel is idle in step S1401; if so, the second wireless signal is started to be transmitted at the first time on the first sub-band in step S1402; if not, the wireless transmission at the first time on the first sub-band is abandoned in step S1403.

As an embodiment, the step S1403 includes: maintaining zero transmit power at the first time on the first sub-band.

As an embodiment, the step S1403 includes: and buffering the information bit corresponding to the second wireless signal to wait for the next transmission opportunity.

As an embodiment, the step S1403 includes: and continuing to perform channel sensing operation to determine time-frequency resources which can be used for transmitting information bits corresponding to the second wireless signal.

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

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

Claims

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

wherein a starting time window occupied by a first radio signal is a reference time window, the first radio signal is one of the K radio signals, and the reference time window belongs to the first set of time windows in a time domain; a first information block is used for generating the first wireless signal, a first set of parameters is used for determining whether the first information block is correctly received, the first set of parameters is one of the K sets of parameters; only the first one of the K sets of parameters is used to determine the Q1 sub-pools of time; the first wireless signal is the latest wireless signal meeting a target condition in the K wireless signals, and the target condition is related to frequency domain resources occupied by the initial transmission of a generated information block corresponding to the wireless signals; when a retransmission and an initial transmission of a generated information block occur in the second sub-band and the first sub-band, respectively, the HARQ-ACK associated to the retransmission is not used for CWS adjustment.

2. The method of claim 1, wherein the target conditions comprise: the frequency domain resources occupied by the initial transmission of at least part of the information bits in the generated information block overlap with the first sub-band.

3. The method of claim 1, wherein the target condition comprises: and the proportion of resource particles occupied by the primary transmission of the generated information block in the first sub-frequency band exceeds a first threshold, and the first threshold is greater than 0 and not greater than 1.

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

if the channel is judged to be idle, a second wireless signal is started to be sent at the first moment on the first sub-frequency band; otherwise, the wireless transmission at the first time on the first sub-band is abandoned.

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

generating a first integer according to the first parameter set;

initializing a first counter to Q2, said Q2 being uniform in distribution probability across all integers between 0 and said first integer;

wherein Q1 is greater than Q2 by 1.

6. The method of claim 5, wherein the channel sensing performed in any one of the Q2 temporal sub-pools comprises:

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

sending K control signaling in the first time window set on the first sub-band, where the K control signaling indicates frequency domain resources occupied by the K wireless signals from a first frequency band, respectively;

wherein the first sub-band belongs to the first frequency band, and the first frequency band includes frequency domain resources outside the first sub-band.

8. The method according to any of claims 1 to 4, wherein the first node is a base station device or the first node is a user equipment.

9. A first node for wireless communication, comprising:

wherein a starting time window occupied by a first radio signal is a reference time window, the first radio signal is one of the K radio signals, and the reference time window belongs to the first set of time windows in a time domain; a first information block is used to generate the first wireless signal, a first set of parameters is used to determine whether the first information block is correctly received, the first set of parameters is one of the K sets of parameters; only the first one of the K sets of parameters is used to determine the Q1 sub-pools of time; the first wireless signal is the latest wireless signal meeting a target condition in the K wireless signals, and the target condition is related to frequency domain resources occupied by the initial transmission of a generated information block corresponding to the wireless signals; when a retransmission and an initial transmission of a generated information block occur in the second sub-band and the first sub-band, respectively, the HARQ-ACK associated to the retransmission is not used for CWS adjustment.

10. The first node of claim 9, wherein the target condition comprises: the frequency domain resources occupied by the initial transmission of at least part of the information bits in the generated information block overlap with the first sub-band.

11. The first node of claim 9, wherein the target condition comprises: and the proportion of resource particles occupied by the primary transmission of the generated information block in the first sub-frequency band exceeds a first threshold, and the first threshold is greater than 0 and not greater than 1.

12. The first node according to any of claim 9, characterized by:

if the channel is judged to be idle, the first transmitter transmits a second wireless signal at the first moment on the first sub-band; otherwise, the first transmitter abandons the wireless transmission at the first time instant on the first sub-band.

13. The first node according to any of claims 9 to 12, characterized by:

the first processor generates a first integer according to the first parameter set; initializing a first counter to Q2, said Q2 being uniform in distribution probability among all integers between 0 and said first integer;

wherein Q1 is greater than Q2 by 1.

14. The first node of claim 13, wherein the channel sensing performed in any one of Q2 time sub-pools comprises:

wherein, in the channel sensing performed in a first temporal sub-pool, a first temporal sub-pool is considered idle, the first temporal sub-pool being an earliest one of the Q1 temporal sub-pools; said Q2 is greater than 0; the Q2 temporal sub-pools are Q1-1 of the Q1 temporal sub-pools except the first temporal sub-pool.

15. The first node according to any of claims 9 to 12, comprising:

a first transmitter transmits K control signaling in the first time window set on the first sub-band, wherein the K control signaling respectively indicates frequency domain resources occupied by the K wireless signals from a first frequency band;

16. The first node according to any of claims 9 to 12, wherein the first node is a base station device or the first node is a user equipment.