NR-u wideband enhancements

Abstract

An apparatus (UE, gNB) for broadband communication with one or more transceivers (UE, gNB) in a wireless communication system using one or more subbands of a predefined broadband is configured to perform an initial listen-before-speak (LBT) for each subband of the predefined broadband to determine one or more unoccupied subbands from the predefined broadband, wherein broadband communication is permitted on the one or more unoccupied subbands during a certain transmission time (COT); and during the certain transmission time (COT), to transmit to and / or receive from the transceivers using the unoccupied subbands. During the certain transmission time (COT), and if the initial LBT indicates that one or more subbands are occupied, the apparatus is configured to perform a further LBT on the one or more occupied subbands to determine that one or more of the initially occupied subbands are no longer occupied, and to transmit to and / or receive from the transceivers using the one or more unoccupied subbands in addition to the initially unoccupied subbands.

Description

Technical Field

[0001] This application relates to the field of wireless communication systems or networks, and more specifically to methods for conducting wireless communication between entities in a wireless communication system using broadband operation. Embodiments relate to NR-U broadband enhancement. Background Technology

[0002] Figures 1(a) and 1(b) are schematic representations of an example of a terrestrial wireless network 100. As shown in Figure 1(a), the terrestrial wireless network 100 includes a core network 102 and one or more radio access networks RAN1, RAN2…RAN N Figure 1(b) shows the Radio Access Network (RAN). n An illustrative representation of the example, the radio access network RAN n This includes one or more base stations gNB1 to gNB5, each serving a specific area around the base station (schematically represented by cells 1061 to 1065). Base stations are provided to serve users within the cell. The term base station (BS) refers to gNB in ​​a 5G network, eNB in ​​UMTS / LTE / LTE-A / LTE-A Pro, or simply BS in other mobile communication standards. Users can be fixed or mobile devices. Mobile or fixed IoT devices connected to base stations or users can also access the wireless communication system. Mobile or IoT devices can include physical devices, ground vehicles (e.g., robots or cars), aircraft (e.g., manned or unmanned aerial vehicles (UAVs), the latter also known as drones), buildings, and other items and devices embedded therein with electronics, software, sensors, actuators, etc., and network connections that enable these devices to collect and exchange data over existing network infrastructure. Figure 1(b) shows a schematic view of five cells; however, RAN n It can include more or fewer such cells, and RAN nAlternatively, only one base station may be included. Figure 1(b) shows two users, UE1 and UE2, also referred to as user equipment (UE), served by base station eNB2 in cell 1062. Another user, UE3, is shown in cell 1064, which is served by base station eNB4. Arrows 1081, 1082, and 1083 schematically represent uplink / downlink connections used for transmitting data from users UE1, UE2, and UE3 to base stations eNB2 and eNB4, or for transmitting data from base stations eNB2 and eNB4 to users UE1, UE2, and UE3. Furthermore, Figure 1(b) shows two IoT devices, 1101 and 1102, in cell 1064, which can be fixed or mobile devices. IoT device 1101 accesses the wireless communication system via base station eNB4 to receive and transmit data, as schematically indicated by arrow 1121. IoT device 1102 accesses the wireless communication system via user UE3, as schematically indicated by arrow 1123. Each of the respective base stations gNB1 to gNB5 can be connected to the core network 102, for example, via the S1 interface and via their respective backhaul links 1141 to 1145, as schematically indicated by arrows pointing to "core" in Figure 1(b). The core network 102 can be connected to one or more external networks. Furthermore, some or all of the respective base stations gNB1 to gNB5 can be connected to each other via the S1 or X2 interface or the XN interface in the NR, via their respective backhaul links 1161 to 1165 (as schematically indicated by arrows pointing to "gNBs" in Figure 1(b)).

[0003] For data transmission, a physical resource grid can be used. A physical resource grid can include a set of resource elements to which various physical channels and physical signals are mapped. For example, physical channels can include physical downlink, uplink and sidelink shared channels (PDSCH, PUSCH, PSSCH) carrying user-specific data (also known as downlink, uplink, and sidelink payload data), physical broadcast channels (PBCH) carrying, for example, Master Information Block (MIB) and System Information Block (SIB), and physical downlink, uplink and sidelink control channels (PDCCH, PUSCH, PSSCH) carrying, for example, downlink control information (DCI), uplink control information (UCI), and sidelink control information (SCI). For uplink, physical channels can also include physical random access channels (PRACH or RACH) used by the UE to access the network after synchronization and obtaining the MIB and SIB. Physical signals can include reference signals or symbols (RS), synchronization signals, etc. A resource grid can include frames or radio frames that have a certain duration in the time domain and a given bandwidth in the frequency domain. The frame can have a certain number of subframes with a predetermined length (e.g., 1 millisecond). Each subframe can include one or more time slots with 12 or 14 OFDM symbols, depending on the cyclic prefix (CP) length. For example, when using a shortened transmission time interval (sTTI) or a mini-slot / non-slot-based frame structure that includes only a few OFDM symbols, the frame can also consist of a smaller number of OFDM symbols.

[0004] The wireless communication system can be any single-frequency or multi-carrier system using frequency division multiplexing, such as orthogonal frequency division multiplexing (OFDM) systems, orthogonal frequency division multiple access (OFDMA) systems, or any other IFFT-based signal with or without CP, such as DFT-S-OFDM. Other waveforms, such as non-orthogonal waveforms used for multiplexing, can be used, for example, filter bank multicarrier (FBMC), generalized frequency division multiplexing (GFDM), or universal filtered multicarrier (UFMC). The wireless communication system can operate, for example, according to the LTE-Advanced pro standard or the 5G or NR (New Radio) standard.

[0005] The wireless network or communication system shown in Figures 1(a) and 1(b) can be a heterogeneous network with different overlapping networks, such as a macro cell network (each macro cell includes macro base stations, such as base stations gNB1 to gNB5) and a network of small cell base stations (such as femtocells or picocells) (not shown in Figures 1(a) and 1(b)).

[0006] In addition to the terrestrial wireless networks described above, there are also non-terrestrial wireless communication networks, including spaceborne transceivers (such as satellites) and / or airborne transceivers (such as unmanned aerial vehicle systems). Non-terrestrial wireless communication networks or systems can operate in a similar manner to the terrestrial systems described above with reference to Figures 1(a) and 1(b) (e.g., according to the LTE-Advanced Pro standard or the 5G or NR (New Radio) standard).

[0007] In mobile communication systems or networks (such as those described above with reference to Figures 1(a) and 1(b), e.g., in LTE or 5G / NR networks), various entities can communicate using broadband operation. In broadband operation, for example, a base station (gNB) and / or user equipment (UE) can transmit on multiple subbands. Subbands can have different bandwidths or the same bandwidth, such as 20 MHz. For broadband operation, the gNB and UE perform Listen-Before-Speak (LBT) separately for each subband, which can result in one or more subbands (also referred to as subsets of subbands) intended for broadband operation being busy or occupied due to transmissions or interference from one or more other public terrestrial mobile networks (PLMNs) or one or more other communication systems (e.g., systems operating according to the IEEE 802.11 specification) coexisting in the same frequency band.

[0008] Note that the information in the above sections is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to those skilled in the art.

[0009] Starting with the existing technology as described above, it may be necessary to improve wireless communication between entities in a wireless communication system using broadband operation. Attached Figure Description

[0010] Embodiments of the present invention will now be described in further detail with reference to the accompanying drawings:

[0011] Figures 1(a) and 1(b) show schematic representations of examples of wireless communication systems;

[0012] Figure 2 This demonstrates the distributed coordination function used in accordance with the IEEE 802.11 specification;

[0013] Figure 3 The LBT-based spectrum sharing mechanism according to the CCA mode is shown;

[0014] Figures 4(a) and 4(b) schematically illustrate broadband operation of NR-U, where Figure 4(a) shows, for example, downlink broadband transmission of gNB, and Figure 4(b) shows, for example, an embodiment transmitted by UE in the uplink.

[0015] Figure 5 It is a schematic representation of a wireless communication system that includes a transmitter (such as a base station) and one or more receivers (such as user equipment (UE));

[0016] Figure 6 An embodiment of the first aspect of the invention is shown, wherein a transmitter (such as a gNB) will perform broadband operation on a set of scheduled resources;

[0017] Figure 7 One embodiment is shown in which the reacquired sub-band has its own new COT, which is independent of the initial COT used for the sub-band during initial use;

[0018] Figure 8 It shows something similar to Figure 6 In some cases, the newly acquired subband is aligned with the initial COT, but the signaling of the availability of the new, no longer occupied subband occurs at different times on different initial subbands.

[0019] Figure 9 An embodiment of the first aspect of the invention is shown, illustrating reserved signaling at the start of a newly acquired subband;

[0020] Figures 10(a) to 10(d) An embodiment of the second aspect of the invention is shown, which is used to report LBT results in uplink signaling;

[0021] Figure 11 An embodiment of the third aspect of the invention is shown, and more specifically, a broadband configuration in an RRC and the corresponding DCI signaling or indication are shown;

[0022] Figures 12(a) to 12(c) An example is shown in which the UE prepares three different PUSCH sizes and selects one PUSCH size based on the LBT results;

[0023] Figures 13(a) to 13(b) An embodiment for attaching a punched portion of the transmission to one or more initially won sub-bands is shown;

[0024] Figures 14(a) to 14(b) An embodiment of the seventh aspect is shown, which operates according to: in response to receiving a transmission, rapidly sending information about a single subband that can be shared between different communication systems; and

[0025] Figure 15 An example of a computer system on which the units or modules described in the method according to the invention and the steps of the method are performed is shown. Detailed Implementation

[0026] Embodiments of the invention will now be described in more detail with reference to the accompanying drawings, wherein the same or similar elements have the same designated reference numerals.

[0027] As described above, in wireless communication systems or networks (such as those described above with reference to Figures 1(a) and 1(b)), various entities can communicate using broadband operation, where, for example, a gNB and a UE can transmit on multiple subbands (e.g., on multiple subbands with different bandwidths or the same bandwidth, such as 20 MHz). Listen-before-speak (LBT) is performed individually on each subband and may result in one or more subbands being busy or occupied due to interference from other communication systems coexisting in the same frequency band (such as other public terrestrial mobile networks (PLMNs) or systems operating according to the IEEE 802.11 specification). In this case, the transmitter (i.e., the gNB or UE transmitting) is only allowed to transmit on subbands that are detected as not busy (also referred to as idle or unoccupied subbands, determined by the LBT algorithm). In this situation, the receiver (e.g., UE) may waste energy because blind decoding is performed not only on all idle or unoccupied subbands (also known as won subbands) but also on busy or occupied subbands (also known as unwon subbands hereinafter).

[0028] Furthermore, spectral efficiency may be reduced because the channel occupancy of a transmitter (such as a gNB) during LBT may be only for a very short duration. For example, during a gNB performing LBT, there may be a short WiFi transmission that only occupies a portion of the transmission time allocated to this transmission (such as a portion of a frame), leaving the main part of the frame unused and thus reducing spectral efficiency.

[0029] As an example, consider the case where a subset of a subband is busy or occupied due to interference from a system operating according to the IEEE 802.11 specification. Figure 2 This illustrates the distributed coordination functions used according to the IEEE 802.11 specification, and more specifically, the inter-frame space, backoff window, and contention window used by the CSMA / CL algorithm of the IEEE 802.11 system, which are described in more detail in the link below:

[0030] [1]https: / / www.cisco.com / c / en / us / td / docs / solutions / Enterprise / Mobility / emob41dg / emob41dg-wrapper / ch5_QoS.html#wp1021972 ,

[0031] [2]https: / / www.tu-ilmenau.de / fileadmin / public / iks / files / lehre / mobicom / AN-10-IEEE_802_11.pdf

[0032] like Figure 2 As shown, DCF is used to send data frames conforming to the IEEE 802.11 standard. DCF consists of the following two main parts:

[0033] · Figure 2 The inter-frame spatial SIFS, PIFS, and DIFS described in the text, and

[0034] • Random backoff (contention window) DCF, used to manage access to RF media.

[0035] The three inter-frame spaces include the Short Inter-Frame Space (SIFS), which typically lasts 10 μs; the Point Coordination Function (PCF) Inter-Frame Space (PIFS), which consists of SCIFS plus one times the slot time (typically totaling 30 μs); and the DCF Inter-Frame Space (DIFS), which consists of SCIFS plus twice the 10 μs slot time, thus typically totaling 50 μs. The inter-frame spaces SCIFS, PIFS, and DIFS are provided to control which traffic first accesses the channel after carrier sensing declares the channel idle. Management frames and those frames that are not expected to compete (e.g., frames as part of a frame sequence) use SIFS, while data frames use DIFS. Figure 2 The diagram illustrates a scenario where, initially, the channel is found to be busy or occupied, thus access is delayed until t1 and the appropriate inter-frame space is applied. For example, when a data frame using DCF is ready to be transmitted, a random backoff number between zero and the minimum contention window is generated, and once the channel is idle for the DIFS interval, the random backoff number begins to decrease for each time slot (e.g., 20 μs) the channel remains idle. If the channel becomes busy during this time, for example, because the random backoff number of another base station becomes zero before the random backoff number of the current base station, the decreasing stops and these steps are repeated. On the other hand, as... Figure 2 As shown on the right-hand side, if the channel remains idle during the decrease of the random backoff number until the backoff number reaches zero, a frame is transmitted.

[0036] References [3] https: / / www.etsi.org / deliver / etsi_en / 301800_301899 / 301893 / 01.07.01_60 / en_301893v010701p.pdf This describes a high-performance wireless access system comprising radio LAN devices used in a wireless LAN. Such a network provides high-speed data communication between devices connected to a wireless infrastructure, and ad-hoc networking is described as allowing devices to communicate directly with each other. In such systems, load-based devices can implement LBT-based spectrum sharing mechanisms using energy detection as described in IEEE 802.11 based on the Space Channel Assessment (CAA) mode. Figure 3 This illustrates an LBT-based spectrum sharing mechanism based on the CCA mode. Before any transmission or burst transmission on the channel, the device performs a CCA check using energy detection, and the device observes the channel during the CCA observation period, which can be no less than 20 μs. This... Figure 3The left-hand side is shown, where the CCA observation time begins at time t0. The CCA observation time ends at t1. In this example, because the energy level detected in the channel exceeds a threshold, the channel is considered occupied or busy, and therefore the device does not transmit. Since the device finds the channel occupied, i.e., since there is no transmission at this time, the device performs extended CCA. During extended CCA, the duration of channel observation is a random factor N multiplied by the CCA observation time. N defines the number of empty idle time slots that need to be observed before initiating transmission, forming the total idle period. Figure 3 As shown in t2, the value N is stored in a counter, which is decremented whenever a CCA time slot is considered idle or unoccupied, and the device can transmit once the counter reaches zero.

[0037] For example, 5G New Radio (NR) technology supports operation in unlicensed frequency bands through a technology called NR-based Unlicensed Spectrum Access (NR-U). Unlicensed spectrum can include bands that coexist with potential IEEE 802.11 standards, such as the 5GHz and 6GHz bands. For example, due to regulatory requirements, NR-U may support bandwidths in integer multiples of 20MHz. Each 20MHz bandwidth channel is designed as a subband, and subband splitting is performed to minimize interference to coexisting systems (such as IEEE 802.11 systems) that can operate in one or more of the same frequency bands with the same nominal bandwidth channels (such as 20MHz channels). Other examples of coexisting systems can use frequency bands with different subband sizes and nominal frequencies than the aforementioned IEEE 802.11 systems. For example, unlicensed frequency bands such as the 24GHz or 60GHz bands can be used. Examples of such unlicensed frequency bands include internationally reserved Industrial, Scientific, and Medical (ISM) radio bands for the use of radio frequency energy for industrial, scientific, and medical purposes other than telecommunications.

[0038] Typically, during wideband operation (e.g., transmissions spanning more than 20 MHz in an unlicensed 5 GHz band), the transmitter (such as a gNB or UE) performs a separate LBT for each subband, and once the LBT results are available for each subband, the device (e.g., a gNB in ​​the downlink (DL) or a UE in the uplink (UL)) is allowed to transmit only on those subbands that are determined to be idle or unoccupied, i.e., on the won subbands. For example, in an unlicensed 5 GHz band, the number of 20 MHz subbands used for wideband operation could be four, resulting in a total bandwidth of 80 MHz, but the actual number of subbands used may differ.

[0039] Figures 4(a) and 4(b) schematically illustrate the broadband operation for NR-U as described above. For such broadband operation, a broadband configuration can be employed, specifying the total bandwidth of the broadband operation, the number of subbands, the corresponding bandwidth of the subbands, and the duration of the broadband operation over time (e.g., the number of symbols) (also known as Channel Occupancy Time (COT)). One or more such broadband configurations may exist in the system. In the presence of multiple broadband configurations, the transmitter can select the broadband configuration to be used from among the available options.

[0040] Figure 4(a) illustrates, for example, a downlink broadband transmission performed by a gNB. Depending on the broadband configuration to be used, a portion of bandwidth BWP 200 can be scheduled; that is, within the available resources, BWP 200 defines the number of subcarriers to be used for broadband operation. For example, BWP 200 may have a total bandwidth of 80 MHz, and the corresponding subbands (also referred to as LBT subbands 2001 to 2004) each have a bandwidth of 20 MHz. Before performing a transmission in the downlink, the gNB performs an LBT on each subband 2001 to 2004 to determine whether the corresponding subband is busy / occupied or idle / unoccupied. In the example shown in Figure 4(a), the LBT performed by the gNB results in: subbands 2001, 2003, and 2004 are idle, while subband 2002 is busy. Therefore, for broadband operation within BWP 200, the gNB wins subbands 2001, 2003, and 2004 for transmission, while subband 2002 is not won. Subband 2002 may be unavailable due to transmissions from coexisting systems such as the aforementioned IEEE 802.11 system. This is indicated by × (indicating LBT failure) in Figures 4(a) and 4(b). In response to the executed LBT algorithm, the gNB selects subbands 2001, 2003, and 2004 for transmitting data in the downlink as indicated by PDSCH#1 and PDSCH#2.

[0041] Figure 4(b) illustrates an example of a UE transmitting in the uplink. Depending on the bandwidth configuration to be used, the BWP 200 is scheduled for broadband operation of the UE, for example, again using 80MHz broadband operation in four LBT subbands 2001 to 2004. The UE initially performs LBT, which results in subband 2002 being busy or not idle and therefore unusable by the UE. Alternatively, assuming the UE prefers to transmit only in consecutive / adjacent subbands in the uplink, the UE in the example of Figure 4(b) selects subbands 2003 and 2004, which are idle according to the LBT algorithm, for transmission in the uplink as indicated by PUSCH#1. No transmission occurs in subband 2001; however, additional data can be transmitted in subband 2001 if discontinuous transmission is possible or necessary.

[0042] As described in, for example, RP-150271 (“Status Report to TSG: Study on Licensed-Assisted Access to Unlicensed Spectrum,” 3GPP RAN#67, March 2015), LBT schemes in 3GPP RAN can be categorized into four distinct classes:

[0043] • Category 1, CAT-1:

[0044] Without LBT,

[0045] Category 2, CAT-2:

[0046] LBT without random backoff (see) Figure 2 ),

[0047] Category 3, CAT-3:

[0048] LBT with random backoff, where the contention window is of a fixed size (see [link]). Figure 2 ),

[0049] Category 4, CAT-4:

[0050] LBT with random backoff, where the contention window is of variable size (see [link]). Figure 2 ).

[0051] In Figures 4(a) and 4(b), when performing broadband operation within a supported or configured BWP 200, for example, by initiating a Channel Occupied Time (COT) through CAT-4LBT. Within a COT initiated by the gNB (see Figure 4(a)), the UE can use the CAT-2LBT procedure to transmit PUCCH or PUSCH. Similarly, for a COT initiated by the UE using CAT-4LBT (see Figure 4(b)), the gNB can use CAT-2LBT to transmit PDCCH or PDSCH within the UE-initiated COT. In either case, the gNB or the UE can instruct the receiver to transmit PDCCH or PDSCH within the COT. gNB or COT UE The maximum time that can be sent within the specified period.

[0052] To save energy, receiving devices (such as UEs) can listen only to the actual transmissions made by their transmitters (such as gNBs) and share the COT subband with the receiver (such as UE). COT sharing (introduced for FeLAA (Further Enhanced Licensed Spectrum Access (LAA))) is a mechanism enabled, for example, by ETSI-BRAN (see reference [3]), in which one device acquires the COT using, for example, CAT-4-LBT if the transmission volume does not exceed the maximum COT limit for a given priority level, while another device shares this COT using a 25μs LBT with a certain interval. This mechanism allows for LAA concessions in the uplink, where the gNB can send a license to the UE before the UE can transmit on the uplink, and the delay between the license and the corresponding UL transmission is at least 4ms. The 4ms pause is not counted in the COT duration. This can also be used for Autonomous Uplink (AUL). Therefore, if the gNB acquires the COT and transmits on the DL without exhausting the full COT, it can indicate to all UEs via the PDCCH that there is still transmission time remaining, allowing the UE to transmit UL transmissions using only 25μs LBT within the configured COT period. Similarly, COT sharing between the UE and gNB is possible, and the UE can share its COT with the gNB, which can then use the 25μs gap and the 25μs LBT performed within that gap for transmission. The gNB transmission may be limited to two OFDM symbols and may include feedback to the UE's AUL transmission, which acquires the COT and transmits the AUL.

[0053] To conserve energy, a receiver (such as a UE) can disable PDCCH monitoring for unwon subbands (i.e., subbands that are occupied or busy as determined by the gNB), allowing blind PDCCH decoding to be performed only on those subbands actually used by the transmitter. For example, for downlink operations in unlicensed bands, a receiver (such as a UE) can perform one or more of the following operations to detect the presence / absence of indications to the gNB or transmitter COT on one or more subbands.

[0054] 1. DMRS detection:

[0055] The UE can search for a specific DMRS sequence on each subband, which indicates a certain gNB-COT acquired by the gNB for transmission to the UE.

[0056] 2. Blind decoding:

[0057] The UE can perform blind PDCCH decoding to detect indications for gNB-COT in downlink control messages. If no PDCCH is detected in a subband, the UE assumes that there is no COT obtained by the gNB for that subband.

[0058] 3. Explicit signaling:

[0059] For example, the gNB signals the actual subbands used by the UE in the Group Common (GC) PDCCH, and then the UE only monitors those active subbands (i.e., the subbands that are signaled) during the PDCCH monitoring period.

[0060] The present invention provides improvements or enhancements to wireless communication between entities using a broadband-operated wireless communication system (e.g., NR-U broadband enhancement), and provides several aspects for enhancing such broadband operation.

[0061] Embodiments of the present invention can be implemented in the wireless communication system shown in Figures 1(a) and 1(b), which includes a base station and users, such as mobile terminals or IoT devices. Figure 5 It includes a transmitter 300 (such as a base station) and one or more receivers 3021 to 302. n A schematic representation of a wireless communication system (such as user equipment (UE)). Transmitter 300 and receiver 302 can communicate via one or more wireless communication links or channels 304a, 304b, 304c (such as radio links). Transmitter 300 may include one or more antennas ANT. T It may include an antenna array having multiple antenna elements coupled to each other, a signal processor 300a, and a transceiver 300b. The receiver 302 may include one or more antennas (ANTs). R This may include an antenna array having multiple antennas coupled to each other, and signal processors 302a1, 302a. n and transceivers 302b1, 302b n Base station 300 and UE 302 can communicate via corresponding first wireless communication links 304a and 304b (e.g., radio links using Uu interfaces), while UE 302 can communicate with each other via a second wireless communication link 304c (e.g., radio links using PC 5 interfaces). When UEs are not served by the base station, are not connected to the base station (e.g., they are not in an RRC connection state), or more generally, when the base station does not provide SL resource allocation configuration or assistance, UEs can communicate with each other via sidelinks. The system, the one or more UEs 302, and the base station 300 can operate in accordance with the teachings of the invention described herein.

[0062] Network equipment, such as base stations or user equipment

[0063] First aspect - Sending a signal to notify the reacquired subband

[0064] The present invention provides (for example, see claim 1) an apparatus (UE, gNB) for performing broadband communication in a wireless communication system.

[0065] Specifically, for broadband communication using one or more subbands of a predefined broadband with one or more transceivers (UE, gNB) in the wireless communication system, the apparatus is configured to:

[0066] • An initial listen-before-tell (LBT) is performed on each subband of a predefined broadband to identify one or more unoccupied subbands from the predefined broadband, wherein broadband communication is permitted on said one or more unoccupied subbands during a certain transmission time (COT).

[0067] • During the specified transmission time (COT), use the unoccupied subband to send to and / or receive from the transceiver, and

[0068] Wherein, during the certain transmission time COT, and if one or more of the initial LBT indicator subbands are occupied, the device is configured to:

[0069] • Perform additional LBT on the one or more occupied subbands to determine that one or more of the initially occupied subbands are no longer occupied, and

[0070] • In addition to the initially unoccupied subbands, the transceiver is also used to send and / or receive data from the transceiver using one or more unoccupied subbands.

[0071] According to an embodiment (see, for example, claim 2), the apparatus is configured to transmit to and / or receive from the transceiver using one or more unoccupied subbands during the transmission time.

[0072] • Equal to the specified transmission time COT, or

[0073] • Longer than a certain transmission time COT, or

[0074] • Shorter than the specified transmission time COT.

[0075] According to an embodiment (see, for example, claim 3), the transmission time of the one or more subbands that are no longer occupied

[0076] • Basically aligned with the end of a certain transmission time COT; or

[0077] • Not aligned with the end of a certain transmission time (COT).

[0078] According to an embodiment (see, for example, claim 4), the device is configured to signal to the one or more transceivers that the subband that is no longer occupied is available.

[0079] According to an embodiment (see, for example, claim 5), the apparatus is configured to: use one or more subbands of the initially unoccupied subbands and / or one or more subbands of the no longer occupied subbands, and a control message indicating the no longer occupied subbands, to signal to the one or more transceivers the no longer occupied subbands.

[0080] According to an embodiment (see, for example, claim 6), control messages (DCI, UCI, RRC, OTT) are provided to the one or more transceivers, the control messages indicating the subband that is no longer occupied, wherein the control messages may be provided by the device, for example, via the core network using RRC signaling or L1 signaling, or over-the-top (OTT) signaling.

[0081] According to an embodiment (see, for example, claim 7), the control message includes a subband field, which indicates which subbands of the predefined bandwidth are available, for example, by setting the corresponding bit of the subband field associated with the subband to a first value indicating an unoccupied state or a second value indicating an occupied state.

[0082] According to an embodiment (see, for example, claim 8), the apparatus is a base station gNB of the wireless communication system and is configured to signal to one or more user equipment UEs of the wireless communication system the unoccupied subband in the PDCCH, the PDCCH including DCI; or the apparatus is a user equipment UE of the wireless communication system and is configured to signal to one or more base stations gNB of the wireless communication system the unoccupied subband in the PUCCH, the PUCCH including UCI; or the apparatus is a user equipment UE of the wireless communication system and is configured to signal to one or more user equipment UEs of the wireless communication system the unoccupied subband in the PSCCH, the PSCCH including SCI.

[0083] According to an embodiment (see, for example, claim 9), the signaling notification indicates the frequency and / or bandwidth of a sub-band that is no longer occupied.

[0084] According to an embodiment (see, for example, claim 10), the apparatus is configured to wait for a certain period of time before transmitting using the no longer occupied subband, for example, to prepare for transmission on the no longer occupied subband, such as by performing a rate matching process.

[0085] According to an embodiment (see, for example, claim 11), the device includes a timer (T), which may be a pre-configured timer or a configured timer, after which the device transmits on the no longer occupied subband, wherein the timer may be started directly after an indication or signaling indicating the existence of the no longer occupied subband.

[0086] According to an embodiment (see, for example, claim 12), the apparatus is configured to send a reservation signaling at the beginning of the transmission time associated with the no longer occupied subband to reserve the subband.

[0087] Second aspect - LBT result report

[0088] The present invention provides (for example, see claim 13) an apparatus (UE, gNB) for performing broadband communication in a wireless communication system.

[0089] Specifically, for broadband communication using one or more subbands of a predefined broadband with one or more transceivers (UE, gNB) in the wireless communication system, the apparatus is configured to:

[0090] • Perform a Listen-Before-Speak (LBT) on each subband of the predefined broadband to determine unoccupied and occupied subbands from the predefined broadband, wherein broadband communication is permitted on the unoccupied subbands during a certain transmission time (COT), and broadband communication is not permitted on the occupied subbands during the same COT period.

[0091] • During the specified transmission time (COT), use the unoccupied subband to send to and / or receive from the transceiver, and

[0092] The device includes multiple predefined messages, each message associated with one or more LBT modes, wherein the LBT modes indicate the unoccupied and occupied subbands of the predefined bandwidth, and

[0093] In response to the LBT indicating a certain LBT mode, the device is configured to select a message associated with the certain LBT mode from the plurality of predefined messages, and signal the selected message to the one or more transceivers.

[0094] According to an embodiment (see, for example, claim 14), the LBT mode

[0095] • Only indicates the unoccupied and occupied subbands of the predefined bandwidth, or

[0096] In addition to the predefined unoccupied and occupied subbands of the broadband, it also indicates those used to send to and / or receive from the transceiver using unoccupied subbands to, for example, ensure the use of unoccupied subbands in UL, or

[0097] • Individually indicates the sub-bands actually used to send to and / or receive from the transceiver to, for example, ensure the use of continuous sub-bands in UL.

[0098] According to an embodiment (see, for example, claim 15), the apparatus is configured to transmit the selected message in one or more subbands of the unoccupied subbands at the beginning of the transmission time.

[0099] According to an embodiment (see, for example, claim 16), the predefined message includes a short PDCCH or PUCCH or PSCCH format with sequence-based encoding, such as PUCCH format 0.

[0100] According to an embodiment (see, for example, claim 17), the predefined message indicates a plurality of possible LBT modes, wherein LBT modes placed in the same state can be selected so as to be easily distinguished from each other, for example by utilizing power sensing, blind decoding or DMRS detection.

[0101] According to an embodiment (see, for example, claim 18), the predefined bandwidth includes four subbands, wherein multiple bits are used to signal the LBT mode, said multiple bits being, for example, bits of a subband field of a control message, and wherein a bit having a first value indicates an unoccupied state, while a bit having a second value indicates an occupied state, and

[0102] When using two bits, the LBT mode can be signaled as follows:

[0103]

[0104] or

[0105]

[0106] or

[0107]

[0108] Alternatively, when using three bits, the LBT mode can be signaled as follows:

[0109]

[0110] The third aspect - pre-configured licenses / allocation for broadband operations

[0111] The present invention provides (for example, see claim 19) an apparatus (UE, gNB) for performing broadband communication in a wireless communication system.

[0112] Specifically, for broadband communication using one or more subbands of a predefined broadband with one or more transceivers (gNB, UE) of the wireless communication system, the apparatus includes a set of broadband configurations.

[0113] Each broadband configuration is associated with a Listen-After-Talk (LBT) mode, which indicates unoccupied and occupied subbands for the predefined broadband. The LBT mode allows broadband communication on the unoccupied subbands during a Transmission Time of Occurrence (COT) and disallows broadband communication on the occupied subbands during the same COT. The LBT mode is obtained by the transceiver gNB and UE by performing LBT on each subband of the predefined broadband.

[0114] The device is configured as follows:

[0115] • Receive from the transceiver (gNB, UE) an indication of the broadband configuration to be used during the COT (Concurrent Transmission Time), and

[0116] • During the certain transmission time (COT), transmit to the transceiver using the broadband configuration indicated by the transceiver (gNB, UE).

[0117] According to an embodiment (see, for example, claim 20), the instruction for broadband configuration is received from the transceiver along with a DL allocation or UL license or a sidelink SL license.

[0118] According to an embodiment (see, for example, claim 21), the apparatus is configured to receive the set of broadband configurations from the transceiver (gNB, UE) using, for example, RRC or L1 signaling.

[0119] According to an embodiment (see, for example, claim 22), the apparatus is configured to receive control messages such as DCI or UCI from the transceiver (gNB, UE), the control messages including a broadband configuration to be used.

[0120] The present invention provides (for example, see claim 23) an apparatus (gNB, UE) for performing broadband communication in a wireless communication system.

[0121] Specifically, for broadband communication using one or more subbands of a predefined broadband with one or more transceivers (UE, gNB) of a wireless communication system, the apparatus is adapted to configure a set of broadband configurations for the transceivers.

[0122] Each broadband configuration is associated with a Listen-After-Speak (LBT) mode, which indicates unoccupied and occupied subbands for the predefined broadband. The LBT mode allows broadband communication on the unoccupied subbands during a Transmission Time of Occurrence (COT) and disallows broadband communication on the occupied subbands during the same COT. The LBT mode is obtained by the device gNB and UE by performing LBT on each subband of the predefined broadband.

[0123] The device is configured to send an instruction to the transceiver (gNB, UE) regarding the broadband configuration to be used during the transmission time (COT).

[0124] According to an embodiment (see, for example, claim 24), the instruction for broadband configuration is sent together with DL allocation or UL license or sidelink SL license.

[0125] According to an embodiment (see, for example, claim 25), the apparatus is configured to provide the set of broadband configurations to the transceiver (UE, gNB) using, for example, RRC or L1 signaling.

[0126] According to an embodiment (see, for example, claim 26), the apparatus is configured to send control messages such as DCI or UCI to the transceiver (UE, gNB), the control messages including the broadband configuration to be used.

[0127] Fourth aspect - Transmission preparation, such as PUSCH or PDSCH

[0128] The present invention provides (for example, see claim 27) an apparatus (UE, gNB) for performing broadband communication in a wireless communication system.

[0129] The device includes a set of broadband configurations for broadband communication with one or more transceivers (gNB, UE) of a wireless communication system using one or more subbands of a predefined broadband. Each broadband configuration indicates multiple subbands of the predefined broadband to be used for the broadband communication.

[0130] Upon receiving an implicit or explicit indication of the broadband configuration to be used and permission to transmit to the transceiver from the gNB and UE, the apparatus is configured to prepare multiple transmissions, each including a different number of subbands and / or different subband modes, depending on the indicated broadband configuration. For example, the different subband modes may also distinguish, for example, frequencies.

[0131] The device is configured as follows:

[0132] • Perform Listen-Before-Speak (LBT) to obtain an LBT mode, which indicates unoccupied and occupied subbands for the predefined bandwidth, wherein broadband communication is permitted on the unoccupied subbands during a certain transmission time (COT), and broadband communication is not permitted on the occupied subbands during the same COT. The bandwidth configuration may be full bandwidth or a configuration including a subset of subbands signaled by the transceiver.

[0133] • Select a prepared transmission that meets one or more criteria or is best suited to the LBT mode, and

[0134] • During the specified transmission time (COT), the selected transmission is sent to the transceiver (gNB, UE).

[0135] According to an embodiment (see, for example, claim 28), the apparatus is configured to receive, using, for example, RRC or L1 signaling, a set of transmissions to be prepared from the transceiver (gNB, UE).

[0136] According to an embodiment (see, for example, claim 29), one or more criteria include one or more of the following:

[0137] • Data rate exceeds predefined threshold

[0138] • The maximum transport block size (TBS) is suitable for the LBT mode.

[0139] • The maximum number of sub-bands is suitable for the LBT mode.

[0140] • Channel quality exceeds a predefined threshold.

[0141] • Priority of associated subband configurations.

[0142] According to an embodiment (see, for example, claim 30), the device is configured as follows:

[0143] • Prepare a transmission with a shorter transmission length, such as a subband, and, if available, transmit the transmission on other subbands to keep those other subbands busy, wherein the device is capable of indicating the number of subbands used, or

[0144] • Generate multiple transmissions with different transmission lengths, such as different numbers of sub-bands, and punch the transmissions to a size that is closest to the number of unoccupied sub-bands, where the size is the number of sub-bands. The device may indicate the number of sub-bands used.

[0145] • Generate multiple transmissions with different transmission lengths, such as different numbers of subbands, and select a transmission with a maximum length less than or equal to the number of unoccupied subbands, wherein the device can indicate the number of subbands used.

[0146] Fifth aspect – Control channel monitoring enables unwon subbands

[0147] The present invention provides (for example, see claim 31) an apparatus (UE, gNB) for performing broadband communication in a wireless communication system.

[0148] Specifically, for broadband communication using one or more subbands of a predefined broadband with one or more transceivers (UE, gNB) in the wireless communication system, the apparatus is configured to:

[0149] • Perform an initial listen-before-tell (LBT) on each subband of the predefined broadband to identify one or more unoccupied subbands from the predefined broadband, wherein broadband communication is permitted on the one or more unoccupied subbands during a certain transmission time (COT).

[0150] • During the specified transmission time (COT), use the unoccupied subband to send to and / or receive from the transceiver.

[0151] Wherein, during a certain transmission time (COT) and if one or more of the initial LBT indicated subbands are occupied, the device is adapted to configure the transceiver to monitor the occupied subbands.

[0152] According to an embodiment (see, for example, claim 32), the configuration uses, for example, RRC signaling or L1 signaling, or over-the-top OTT signaling, through the core network.

[0153] The present invention provides (for example, see claim 33) an apparatus (UE, gNB) for performing broadband communication in a wireless communication system.

[0154] Specifically, for broadband communication using one or more subbands of a predefined broadband with one or more transceivers (UE, gNB) in the wireless communication system, the apparatus is configured to:

[0155] • Receives from the transceiver an indication of unoccupied subbands of the predefined bandwidth, allowing broadband communication on the unoccupied subbands during a certain transmission time (COT). The unoccupied subbands are obtained by the transceiver (gNB, UE) through performing LBT on each subband of the predefined bandwidth.

[0156] • During the specified transmission time (COT), transmit to the transceiver using the unoccupied subband of the predefined bandwidth.

[0157] The device is configured as follows:

[0158] It also receives from the transceiver an indication of the occupied subband of the predefined bandwidth, and

[0159] • Monitor the occupied sub-bands.

[0160] According to an embodiment (see, for example, claim 34), the device is configured to monitor a subband by the core network using, for example, RRC signaling or L1 signaling, or over-the-top OTT signaling.

[0161] Sixth aspect - Additional details on the drilled portion

[0162] The present invention provides (for example, see claim 35) an apparatus (UE, gNB) for performing broadband communication in a wireless communication system.

[0163] Specifically, for broadband communication using one or more subbands of a predefined broadband with one or more transceivers (UE, gNB) in the wireless communication system, the apparatus is configured to:

[0164] • An initial listen-before-speak (LBT) is performed on each subband of the predefined broadband to identify one or more unoccupied subbands and occupied subbands from the predefined broadband, wherein broadband communication is permitted on the one or more unoccupied subbands during a certain transmission time (COT), and broadband communication is not permitted on the occupied subbands during the certain transmission time (COT).

[0165] The transmission includes one or more first portions associated with one or more unoccupied subbands, and one or more second portions associated with one or more occupied subbands.

[0166] The device is configured as follows:

[0167] • Using the one or more unoccupied sub-bands to send the one or more first portions of the transmission, and

[0168] • Attach the one or more second portions of the transmission to the one or more unoccupied subbands.

[0169] According to an embodiment (see, for example, claim 36), the device is configured to notify the transceiver during the certain transmission time (COT):

[0170] • The one or more second parts are sent, and

[0171] • Used to transmit the one or more unoccupied subbands of the one or more second parts.

[0172] According to an embodiment (see, for example, claim 37), the device is configured as follows:

[0173] • The indication indicates that a punch has occurred, and the indication indicates that one or more punched portions have been retransmitted, or

[0174] • Indicates that one or more punctured portions have been retransmitted, thereby notifying the transceiver that puncturing has occurred.

[0175] According to an embodiment (see, for example, claim 38), the device is configured to signal punching / retransmission at the beginning or end of the original transmission.

[0176] According to an embodiment (see, for example, claim 39), appending the one or more second portions of the transmission to the one or more unoccupied subbands includes:

[0177] • Initiate a new transmission time (COT), or

[0178] • Extend the current transmission time (COT).

[0179] According to an embodiment of the invention (see, for example, claim 40), in order to initiate a new transmission time (COT), the apparatus is configured to:

[0180] • At the end of the current transmission time (COT), for example by performing a CAT-4 or CAT-2 LBT, another LBT is performed on one or more subbands in the initially unoccupied subbands, and

[0181] • In response to the additional LBT indication that the initially unoccupied subband is not occupied, the one or more second portions are appended.

[0182] According to an embodiment (see, for example, claim 41), in order to extend the current transmission time (COT), the device is configured to:

[0183] • Perform the initial LBT such that, for example, by selecting a contention window size CWS for the LBT to obtain the maximum allowed COT duration, a transmission time COT sufficient to attach at least some of the second portions of the one or more second portions is obtained.

[0184] According to an embodiment (see, for example, claim 42), a possible transmission time COT is signaled within the original transmission using, for example, DCI or UCI.

[0185] Seventh aspect - Fast control of separate subcarrier spacing (SCS) without LBT

[0186] The present invention provides (for example, see claim 43) an apparatus (UE, gNB) for performing broadband communication in a wireless communication system.

[0187] Specifically, for communication using one or more subbands with one or more transceivers (UE, gNB) in the wireless communication system, the apparatus is configured to:

[0188] • An initial listen-before-tell (LBT) is performed on each subband of a predefined broadband to identify one or more unoccupied subbands from the predefined broadband, wherein broadband communication is permitted on said one or more unoccupied subbands during a certain transmission time (COT).

[0189] During a certain transmission time (COT), one or more subbands include a first portion and a second portion, wherein the means is configured to transmit to or receive from a transceiver in the first portion having a certain subcarrier interval, and to receive from or transmit to the transceiver in the second portion having a different subcarrier interval than the certain subcarrier interval.

[0190] According to an embodiment (see, for example, claim 44), the subcarrier interval in the first part includes a first subcarrier interval for transmission and a second subcarrier interval for reception, wherein the first subcarrier interval and the second subcarrier interval are different.

[0191] According to an embodiment (see, for example, claim 45)

[0192] • The other subcarrier spacing is higher than the first subcarrier spacing.

[0193] The first portion of the subband is used to send data to or receive data from the transceiver, and

[0194] The second portion of the subband is used for substantially real-time control transmissions to the transceiver, such as PDCCH, PUCCH, or PSCCH, without performing LBT, the substantially real-time control transmissions including, for example, HARQ feedback.

[0195] According to an embodiment (see, for example, claim 46), the second portion of the subband immediately follows the first portion, or follows the first portion with a gap less than the duration of the second portion, wherein the gap time can be 16 µs at the maximum gap time, and the SCS can be 60 kHz for another subcarrier spacing SCS used for short control, and wherein the second portion can be shorter than the duration of the shortest LBT listening window.

[0196] According to an embodiment (see, for example, claim 47), the other subcarrier spacing is configured using, for example, RRC, or is predefined.

[0197] Overview

[0198] According to an embodiment (see, for example, claim 48), the apparatus includes one or more of the following: a user equipment (UE), which includes a mobile terminal, a fixed terminal, a cellular IoT-UE, a vehicle-mounted UE, a vehicle-mounted group leader (GL) UE, an IoT or narrowband IoT (NB-IoT) device, a ground vehicle, an aircraft, a drone, a mobile base station, a roadside unit, a building, or any other item or device provided with a network connection, the network connection enabling the item / device to communicate using the wireless communication network, the item / device being, for example, a sensor or actuator; or the apparatus includes a base station, which includes a macro cell base station, a small cell base station, a central unit of a base station, a distributed unit of a base station, a roadside unit, a UE, a group leader (GL), a relay, a remote radio head, an AMF, an SMF, a core network entity, a mobile edge computing entity, a network slice in an NR or 5G core context, or any transmit / receive point (TRP) that enables the item or device to communicate using the wireless communication network, the item or device being provided with a network connection to communicate using the wireless communication network.

[0199] system

[0200] The present invention provides (see, for example, claim 49) a wireless communication system comprising a plurality of the devices of the present invention.

[0201] method

[0202] First aspect - Sending a signal to notify the reacquired subband

[0203] This invention provides (for example, see claim 50) a method for performing broadband communication in a wireless communication system, the method comprising:

[0204] For broadband communication using one or more subbands of a predefined broadband with one or more transceivers (UE, gNB) in the wireless communication system,

[0205] • Perform an initial listen-before-tell (LBT) on each subband of the predefined broadband to identify one or more unoccupied subbands from the predefined broadband, wherein broadband communication is permitted on the one or more unoccupied subbands during a certain transmission time (COT).

[0206] • During the specified transmission time (COT), use the unoccupied subband to send to and / or receive from the transceiver, and

[0207] During the specified transmission time (COT), and if one or more of the initial LBT indicator subbands are occupied,

[0208] • Perform additional LBT on the one or more occupied subbands to determine that one or more of the initially occupied subbands are no longer occupied, and

[0209] • In addition to the initially unoccupied subbands, the transceiver is also used to send and / or receive data from the transceiver using one or more unoccupied subbands.

[0210] Second aspect - LBT result report

[0211] The present invention provides (for example, see claim 51) a method for performing broadband communication in a wireless communication system, the method comprising:

[0212] For broadband communication using one or more subbands of a predefined broadband with one or more transceivers (UE, gNB) in the wireless communication system,

[0213] • Perform a Listen-Before-Speak (LBT) on each subband of the predefined broadband to determine unoccupied and occupied subbands from the predefined broadband, wherein broadband communication is permitted on the unoccupied subbands during a certain transmission time (COT), and broadband communication is not permitted on the occupied subbands during the same COT period.

[0214] • During the specified transmission time (COT), use the unoccupied subband to send to and / or receive from the transceiver, and

[0215] This includes providing multiple predefined messages, each associated with one or more LBT modes, where each LBT mode indicates the unoccupied and occupied subbands of the predefined bandwidth.

[0216] In response to the LBT indicating a certain LBT mode, a message associated with the certain LBT mode is selected from the plurality of predefined messages, and the selected message is signaled to the one or more transceivers.

[0217] The third aspect - pre-configured licenses / allocation for broadband operations

[0218] The present invention provides (for example, see claim 52) a method for performing broadband communication in a wireless communication system.

[0219] Specifically, for broadband communication between one or more subbands of the wireless communication system and one or more transceivers (gNB, UE) using predefined broadband, a set of bandwidth configurations is provided.

[0220] Each broadband configuration is associated with a Listen-After-Talk (LBT) mode, which indicates unoccupied and occupied subbands for the predefined broadband. The LBT mode allows broadband communication on the unoccupied subbands during a Transmission Time of Occurrence (COT) and disallows broadband communication on the occupied subbands during the same COT. The LBT mode is obtained by the transceiver gNB and UE by performing LBT on each subband of the predefined broadband.

[0221] The method includes:

[0222] • Receive from the transceiver (gNB, UE) an indication of the broadband configuration to be used during the COT (Concurrent Transmission Time), and

[0223] • During the certain transmission time (COT), transmit to the transceiver using the broadband configuration indicated by the transceiver (gNB, UE).

[0224] Fourth aspect - Transmission preparation, such as PUSCH or PDSCH

[0225] This invention provides (for example, see claim 53) a method for performing broadband communication in a wireless communication system, the method comprising:

[0226] A set of broadband configurations is provided for broadband communication with one or more transceivers (gNB, UE) of a wireless communication system using one or more subbands of a predefined broadband, each broadband configuration indicating multiple subbands of the predefined broadband to be used for the broadband communication.

[0227] After receiving implicit or explicit indications of the broadband configuration to be used and permission to transmit to the transceiver from the gNB and UE, multiple transmissions are prepared. Each transmission includes a different number of subbands and / or different subband modes, depending on the indicated broadband configuration. For example, the different subband modes also distinguish, for example, frequencies.

[0228] The Listen-Before-Speak (LBT) method is executed to obtain an LBT mode that indicates unoccupied and occupied subbands for the predefined bandwidth. This LBT mode allows broadband communication on the unoccupied subbands during a certain transmission time (COT) and disallows broadband communication on the occupied subbands during the same COT. The bandwidth configuration can be full bandwidth or a configuration including a subset of subbands signaled by the transceiver.

[0229] Select a prepared transmission that meets one or more criteria or is best suited to the LBT mode, and

[0230] During a certain transmission time (COT), the selected transmission is sent to the transceiver (gNB, UE).

[0231] Fifth aspect – Control channel monitoring enables unwon subbands

[0232] The present invention provides (for example, see claim 54) a method for performing broadband communication in a wireless communication system, the method comprising:

[0233] For broadband communication using one or more subbands of a predefined broadband with one or more transceivers (UE, gNB) in the wireless communication system,

[0234] • Perform an initial listen-before-tell (LBT) on each subband of the predefined broadband to identify one or more unoccupied subbands from the predefined broadband, wherein broadband communication is permitted on the one or more unoccupied subbands during a certain transmission time (COT).

[0235] • During the specified transmission time (COT), use the unoccupied subband to send to and / or receive from the transceiver.

[0236] During a certain transmission time (COT), and if one or more of the initial LBT indicated subbands are occupied, the transceiver is configured to monitor the occupied subbands.

[0237] This invention provides (for example, see claim 55) a method for performing broadband communication in a wireless communication system, the method comprising:

[0238] For broadband communication using one or more subbands of a predefined broadband with one or more transceivers (UE, gNB) in the wireless communication system,

[0239] • Receives from the transceiver an indication of unoccupied subbands of the predefined bandwidth, allowing broadband communication on the unoccupied subbands during a certain transmission time (COT). The unoccupied subbands are obtained by the transceiver (gNB, UE) through performing LBT on each subband of the predefined bandwidth.

[0240] • During the specified transmission time (COT), transmit to the transceiver using the unoccupied subband of the predefined bandwidth.

[0241] It also receives from the transceiver an indication of the occupied subband of the predefined bandwidth, and

[0242] Monitor the occupied sub-bands.

[0243] Sixth aspect - Additional details on the drilled portion

[0244] This invention provides (for example, see claim 56) a method for performing broadband communication in a wireless communication system, the method comprising:

[0245] For broadband communication using one or more subbands of a predefined broadband with one or more transceivers (UE, gNB) in the wireless communication system,

[0246] • An initial listen-before-speak (LBT) is performed on each subband of the predefined broadband to identify one or more unoccupied subbands and occupied subbands from the predefined broadband, wherein broadband communication is permitted on the one or more unoccupied subbands during a certain transmission time (COT), and broadband communication is not permitted on the occupied subbands during the certain transmission time (COT).

[0247] The transmission includes one or more first portions associated with one or more unoccupied subbands, and one or more second portions associated with one or more occupied subbands.

[0248] The one or more first portions of the transmission are sent using the one or more unoccupied sub-bands, and

[0249] The one or more second portions of the transmission are appended to the one or more unoccupied subbands.

[0250] Seventh aspect - Fast control of separate subcarrier spacing (SCS) without LBT

[0251] This invention provides (for example, see claim 57) a method for performing broadband communication in a wireless communication system, the method comprising:

[0252] For broadband communication using one or more subbands of a predefined broadband with one or more transceivers (UE, gNB) in the wireless communication system,

[0253] • Perform an initial listen-before-tell (LBT) on each subband of the predefined broadband to identify one or more unoccupied subbands from the predefined broadband, wherein broadband communication is permitted on the one or more unoccupied subbands during a certain transmission time (COT).

[0254] During a certain transmission time (COT), one or more subbands include a first portion and a second portion, wherein the method includes:

[0255] • To transmit to or receive from the transceiver in the first portion having a certain subcarrier spacing, and

[0256] • Receive from or transmit to the transceiver in the second portion of another subcarrier interval that is different from the aforementioned subcarrier interval.

[0257] Computer program products

[0258] The present invention provides a computer program product including instructions that, when executed by a computer, cause the computer to perform one or more methods according to the present invention.

[0259] First aspect - Sending a signal to notify the reacquired subband

[0260] According to this aspect, embodiments of the invention allow for the use of initially busy or occupied subbands, or unwon subbands, for broadband communication if they become available during the transmission time (COT) acquired by the transmitter. For example, communication by another communication system on a certain subband may end during the COT, making that band no longer occupied and available for broadband communication. If this occurs, the entity initiating the broadband communication (e.g., gNB or UE) can signal to the corresponding communication partner (e.g., UE or gNB or any other transceiver) that one or more initially occupied subbands have been reacquired, and that transmission can now occur on these reacquired subbands.

[0261] Figure 6An embodiment of the first aspect of the invention is illustrated, wherein a transmitter (such as a gNB) performs broadband operation on a set of scheduled resources (e.g., on a scheduled BWP 200 for a certain channel occupancy time (COT). Similar to Figures 4(a) and 4(b), the BWP 200 can span four subbands 2001 to 2004 (each with a certain bandwidth, e.g., 20 MHz), enabling broadband operation in an 80 MHz frequency band. Figure 6 As shown on the left-hand side, initially, the gNB performs the corresponding LBT for each subband 2001 to 2004. This corresponding LBT concludes that initially (i.e., at time t0), only subbands 2002 to 2004 are idle or unoccupied, i.e., they can be used for broadband transmission by the gNB. However, LBT1 performed on subband 2001 concludes that this subband is not idle or occupied at time t0, i.e., it cannot be used for transmission. According to the first aspect of the invention, with reference to the above... Figure 3 In the discussed manner, the gNB continues to perform LBT on the unwon subband 200, for example by performing an extended CCA check on band 2001, which, in an embodiment, concludes that subband 2001 is no longer occupied at time t1 and is therefore available for wideband operation of the gNB. In response to detecting that subband 2001 is available, the gNB can signal this to the receiver (e.g., UE) to which the wideband operation is directed, for example by providing corresponding information in a downlink control message transmitted on one or more initially idle subbands. Figure 6 In the embodiments, in each of the initial idle subbands 2002 to 2004, PDCCHs 2021 to 2023 may be transmitted to indicate to the receiver a corresponding resource in a subband 2001 that is no longer occupied (on which the receiver's data is also transmitted). This indication of the corresponding resource is schematically represented by corresponding arrows 2041 to 2043 (pointing from the corresponding PDCCH to the unoccupied subband 2001).

[0262] although Figure 6 An embodiment is shown where the transmitter is a base station or gNB; however, note that the same method can be applied when the transmitter is a user equipment (e.g., a UE transmitting to a gNB). In this case, the UE can provide appropriate information (e.g., ...) Figure 6 The method in the corresponding subband (2002 to 2004) signals to the gNB that the initially occupied subband is now available and data is being transmitted on the no longer occupied subband.

[0263] although Figure 6The transmission of corresponding information 2021 to 2023 in each initially unoccupied subband is illustrated; however, this information may only be transmitted in a subset of the initially available subbands. Furthermore, instead of indicating in the initially unoccupied subbands, resources in the no longer occupied subbands are now also used for the transmission. According to other embodiments, control messages 2021 to 2023 may only indicate to the receiver that the no longer occupied subband 2001 is also being monitored to obtain control messages, as indicated by PDCCH 2024 transmitted in the no longer occupied subband 2001.

[0264] Therefore, according to a first aspect of the invention, the transmitter (e.g., gNB) continues to perform LBT on unwon subbands (i.e., those subbands that the initial LBT indicated were occupied or busy) during gNB COT. If one or more new / additional subbands are won / acquired within gNB-COT (e.g. Figure 6 If a new subband (such as subband 2001) is identified as available, the gNB can also transmit on this / these newly acquired subbands. Once a new subband (such as subband 2001) is identified as available, the gNB will begin transmitting on the new subband, in addition to the subbands 2002 to 2004 that have already been acquired.

[0265] According to an embodiment, the gNB can transmit using one of the following two methods:

[0266] • End alignment COT:

[0267] Until the end of gNB COT, or

[0268] • Non-end-aligned COT:

[0269] Based on the LBT performed to obtain this subband, the new COT can last longer or shorter than the original COT.

[0270] Figure 6 An embodiment is shown in which the new subband 2001 ends with the gNB COT alignment of the original subbands 2002 to 2004.

[0271] Figure 7 An embodiment is shown in which the new subband 2001 has its own new gNB COT, which is independent of the other gNB COTs of the initially used subbands 2002 to 2004. Figure 7 In one embodiment, the COT on the newly acquired or no longer occupied subband 2001 is longer than the COT in the initial subband. More specifically, as... Figure 7 As shown, the initial or original gNB COT extends from t0 to t2, while the COT associated with the reacquired or no longer occupied subband 2001 continues from t1 to t3.

[0272] Based on existing implementations within a COT (e.g., COTs for subbands 2002 to 2004), for example, GC-PDCCH is used to indicate / signal to a receiver (such as a UE) (which is also operating on broadband): the new subband 2001 is now available for broadband operation. Such signaling can indicate a specific allocation or subband size, for example, where the subband size is not fixed at 20MHz (used in a 5GHz carrier band) as described above.

[0273] exist Figure 6 and Figure 7 The present invention has described an embodiment in which corresponding PDCCHs 2021 to 2023 are transmitted substantially simultaneously in the initially obtained subbands 2002 to 2004. However, the present invention is not limited to such an embodiment; rather, not all subbands in the corresponding initially obtained subbands may be used for transmitting PDCCHs. Furthermore, PDCCHs may be signaled at different times, such as... Figure 8 As illustrated in the diagram, a scene similar to... Figure 6 In this case, the newly acquired subband 2001 is aligned with the initial gNB-COT, but the signaling of the availability of new, no longer occupied subbands occurs at different times on different initial subbands 2002 to 2004. More specifically, as... Figure 8 As shown, once it has been determined that subband 2001 is now also available at time t1, the first PDCCH 2021 can be transmitted at the same time t1 or later in the first initially idle or unoccupied subband 2002. In other initially used subbands 2003 to 2004, transmission can be made at different times after the initial transmission of PDCCH 2021 (e.g., in subband 2003, at a later time t1). l Late time t l ', and in subband 2004, at a time t1'' longer than time t1 and t1', send the corresponding PDCCH 2022 and 2023.

[0274] about Figure 6 , Figure 7 and Figure 8 The above embodiments have been described in an environment where broadband operations occur between a transmitter (such as a gNB or UE) and a receiver (such as a UE and a gNB). However, the present invention is not limited to communication between a gNB or base station and a user equipment (such as a UE); rather, the above principles can also be applied to device-to-device communication, such as D2D, V2V, and V2X communication. In this case, communication occurs via a side link between the various devices. The transmitter is a first UE, and the receiver is a second UE.

[0275] According to an embodiment of the first aspect, a receiver for broadband communication from a transmitter can transmit a transmission from the receiver to the transmitter within the transmitter's COT (Content over Time). For example, when considering the case where the gNB is the transmitter, in Figures 6 to 8 Within the gNBCOT shown, a receiver (such as a UE) can transmit from the UE to the gNB on one or more subbands, such as feedback information about downlink transmissions. According to the first aspect, for such transmissions returning to the transmitter (such as uplink), a subband reacquisition timer for uplink reacquisition in broadband operation can be provided. More specifically, the receiver can wait for a certain period before transmitting on a reacquisitioned or no longer occupied subband, for example, to prepare for transmission on a no longer occupied subband, such as a rate matching process. For example, during connection establishment, the ability to transmit on a no longer occupied subband can be activated or deactivated through (pre)configuration, or this capability can be a UE capability of the receiver (indicated to the transmitter). For example, as referenced above... Figures 6 to 8 As explained, when the UE is a receiver in broadband operation, the UE may not transmit uplink transmissions (such as PUSCH) in the newly acquired subband 2001 immediately after the LBT indicates the subband's availability. The UE can wait for timer T (which can be a pre-configured timer or a timer configured by a DCI message, etc.) before transmitting on the newly acquired subband 2001. This situation occurs in... Figure 6 The middle is symbolically represented. Figure 6 A PUSCH 2061 for the reacquired subband 2001 is shown. This PUSCH 2061 is transmitted after a time period T following a period of time T after the UE or receiver receives an indication from the transmitter that the new subband 2001 is available. For example, the time T is indicated by the mentioned timer from the time PDCCH 2024 received in the reacquired subband 2001. Therefore, according to the embodiment, the timer starts directly after the indication or signaling of the existence of the reacquired subband 2001. Time T can be used to perform rate matching or to prepare for a longer broadband PUSCH, i.e., Figure 6 The PUSCH 2061 indicated therein can also span one or more of the initially available subbands 2002 to 2004.

[0276] According to other embodiments of the first aspect, control messages (such as...) Figure 6The PDCCH shown may include a DCI that signals, for example, an acquired subband (e.g., subband 2001) that is no longer occupied by setting corresponding bits in the subband field of the DCI. The DCI may also signal a maximum number of bits, which is used to signal the reacquired subband in the subband field. Subsequent tables indicate examples of signaling available subbands among multiple or a maximum number of subbands for broadband operation in the DCI. The first three tables use a two-bit subband field to indicate possible signaling, allowing the DCI to indicate a maximum of 2 bits for signaling subbands, and a certain bit combination indicated in the first three tables indicates a corresponding subband available for broadband communication. The fourth table indicates an example of signaling available subbands using three bits; that is, the DCI signals a maximum of three bits to be signaled, and signals available / unavailable subbands through corresponding combinations of the three bits indicated in the table.

[0277]

[0278] Table 1 shows exemplary LBT patterns reported, for example, in DL Control Information (DCI).

[0279]

[0280] Table 2 shows exemplary LBT patterns reported, for example, in DL Control Information (DCI).

[0281]

[0282] Table 3

[0283] An example LBT pattern reported, for example, in DL Control Information (DCI).

[0284]

[0285] Table 4

[0286] An example LBT pattern reported, for example, in DL Control Information (DCI):

[0287] According to other embodiments of the first aspect of the invention, the transmitter (e.g., gNB or UE) for the reacquisition of an initially occupied subband for broadband operation can send a reservation signal at the beginning of the transmission time associated with the no longer occupied subband to ensure that the subband is reserved for broadband operation. Figure 9 An embodiment of the first aspect of the invention is shown, illustrating reserved signaling at the beginning of a newly acquired subband. Figure 9 It shows the relationship with Figure 6Similar to the embodiments described above, in which the COT of the newly acquired sub-band 2001 is aligned with the COT of the originally used sub-bands 2002 to 2004. Figure 9 The diagram illustrates a reservation signaling message sent by a transmitter (such as a gNB) at point 208. This reservation signaling is sent precisely at the beginning of the COT of the newly acquired subband 2001 in the absence of a UE that can be initially scheduled, in order to reserve the subband. For example, in... Figure 9 In the scenario shown, through PDCCH 2021 to 2023, no scheduling of resources in the re-acquired subband 2001 for the UE occurs before time t1”” (a period of time after time t1 has been determined to be no longer occupied by the subband 2001). Therefore, data transmission to the UE only begins at time t1”””, and to avoid other coexisting communication systems also using subband 2001 performing transmissions on that subband, the gNB sends a reservation signaling, causing subband 2001 to be identified as busy or occupied by other communication systems from t1 onwards, so that the other communication systems do not transmit on that subband, and that subband can be used for the broadband operation of the gNB according to the method of the invention.

[0288] about Figure 9 It should be noted that the reserved signal can also be applied to the other embodiments described above, that is, in combination with Figure 6 , Figure 7 and Figure 8 Examples of implementations.

[0289] Second aspect - LBT result report

[0290] According to this aspect, embodiments of the present invention provide a method for improved reporting of the results of LBT initiated by a transmitter (e.g., a base station gNB or a user equipment UE). For example, in the case of a UE-initiated broadband operation using a certain COT, the LBT process may result in failure on a subset of LBT subbands (i.e., on one or more subbands that may be occupied or busy). As described above with reference to the first aspect, such failure will be signaled to the receiver in a corresponding control message. When considering a UE-initiated broadband operation, the receiver is the base station. An issue to consider for such a UE-initiated broadband operation is that preparing the PUSCCH or PUSCH requires some preparation time. Since no transmissions from the UE occur in the uplink during the preparation time, the subband newly won by the UE and which may also be used by the coexisting communication system appears idle or unoccupied to such coexisting systems, and therefore the time available for preparing such signaling is limited. The coexisting system may begin communication on the subband, which was initially won by the UE currently preparing to signal to the gNB (e.g., to indicate which subbands are used for broadband operation). Therefore, the transmitter (such as the UE) may not have enough time to prepare messages or signaling (such as PUCCH or PUSCH transmissions), including a single bit for signaling the availability of each subband in the originally configured or pre-configured number of subbands within the active BWP, which spans a wider bandwidth due to the excessive number of bits required. For example, in the case of four subbands configured, the transmitter would send four bits, each indicating the LBT result of the corresponding subband. This would require the use of a PUCCH format other than format zero, which requires even more preparation time.

[0291] To address this issue, according to an embodiment of the second aspect of the invention, instead of generating signaling after the LBT process is completed, the transmitter (e.g., UE) stores multiple predefined messages associated with the corresponding LBT mode, indicating occupied and unoccupied subbands in the broadband to be used for broadband operation. Therefore, once the LBT process is complete and the number of subbands available for communication in the entire broadband is known, the transmitter (e.g., UE) can select a suitable message from the predefined messages to immediately signal to the gNB which subbands the UE uses for uplink communication. According to an embodiment, a general broadband configuration (i.e., the number of subbands forming the broadband for broadband operation) can be configured or pre-configured in the system such that, according to an embodiment, the predefined messages can only indicate which subbands are occupied and which are unoccupied in the predefined broadband. In other embodiments, only those unoccupied subbands are signaled or indicated in the message; these unoccupied subbands are actually used for transmission to and / or reception from the transceiver (e.g., gNB). For example, in the case of uplink transmission from UE to gNB (preferably using consecutive subbands for transmission), a signal can be sent to indicate the subbands that are actually available and in use (see Figure 4(b)). According to yet another embodiment, for example again, in the case of uplink transmission using multiple consecutive subbands, the corresponding message can indicate the unused subbands and the used subbands, as well as those unused subbands actually used for transmission.

[0292] Figures 10(a) to 10(d) An embodiment of the second aspect of the invention is shown, which is used to report LBT results in uplink signaling (e.g., PUSCCH). Figures 10(a) to 10(d) Assuming the broadband operation has been initiated by the UE, i.e., the embodiment involves uplink communication from the UE to the gNB. Figures 6 to 9 Similarly, it is assumed that a pre-configured broadband operation is performed using a BWP 200, which includes, for example, four subbands 2001 to 2004 with the same bandwidth (e.g., 20 MHz).

[0293] Figure 10(a) illustrates an embodiment in which the UE performs the LBT algorithm for each of subbands 2001 to 2004. In the depicted embodiment, the algorithm concludes that LBT subbands 2003 and 2004 are not busy (i.e., idle or unoccupied) and that the channel occupancy time (COT) is within a certain range. UE This can be used for broadband communication to the gNB. Next, the LBT process occurs at time t0 (i.e., at COT). UEThe start of the control signaling (such as PUCCH 210) is used to notify the gNB. More specifically, for the available subbands shown in Figure 10(a), a suitable PUCCH 210 is selected from a plurality of predefined control messages and sent immediately after the LBT process to signal those subbands (i.e., subbands 2003 and 2004) used for uplink transmission PUSCH to the gNB. In the embodiment of Figure 10(a), subbands 2001 and 2002 are determined by the LBT process to be busy or occupied and therefore not used for uplink communication. As mentioned above, according to some embodiments, it may be desirable to use consecutive subbands for uplink communication. Therefore, Figure 10(a) also covers a scenario where, for example, LBT subband 2001 has also been found to be available (i.e., unoccupied), but due to the requirement of using consecutive subbands, only the available subbands shown in Figure 10(a) or the unoccupied subbands 2003 and 2004 are actually used for uplink communication to the gNB. In the embodiment of Figure 10(a), signaling regarding the LBT mode used by the UE for uplink is sent in a common message spanning the two available subbands 2003 and 2004.

[0294] Figure 10(b) illustrates an embodiment similar to the one in Figure 10(a), except that the signaling for LBT mode used by the UE for the uplink is only signaled by PUCCH 210 in one of the used or unused subbands, whereas in the embodiment described above, the signaling is only signaled in subband 2004. In other embodiments, instead of transmitting PUCCH 210 in subband 2004, it may be transmitted in subband 2003.

[0295] Figure 10(c) illustrates another embodiment, again similar to the embodiments of Figures 10(a) and 10(b). According to the embodiment of Figure 10(c), in each subband won or used for uplink communication (i.e., in each subband of subbands 2003 and 2004), as indicated by PUCCH 2101 and 2102, appropriate signaling selected from predefined messages is transmitted.

[0296] Figure 10(d) illustrates another embodiment, in which it is assumed that only subband 2002 is unavailable for UE-to-gNB broadband communication, and further, it is assumed that the uplink can also use non-contiguous subbands. According to this embodiment, uplink communication PUSCH is performed in each of the unoccupied subbands 2001, 2003, and 2004, while subband 2002 has been identified as occupied or busy by the LBT algorithm. As shown by PUCCH 2101 to 2103, in a manner similar to the embodiment of Figure 10(c), a corresponding PUCCH is selected for each subband and transmitted in each subband. Note that in the embodiment of Figure 10(d), the appropriate signaling message for signaling the actual LBT subband to be used can be selected from the aforementioned predefined multiple messages, so that the UE does not need to prepare a PUCCH, but instead selects one or more appropriate predefined messages to transmit. According to another embodiment, instead of transmitting a PUCCH in each subband, the method described with reference to Figures 10(a) and 10(b) can also be used.

[0297] Therefore, according to the above embodiments, the number of acquired subbands (i.e., unoccupied or idle subbands) or LBT mode is signaled using a predefined message. This predefined message may include a message with a short PUCCH length or format, for example, with sequence-based coding using PUCCH format 0. Sequence-based coding means that each possible signaling state is associated with a predefined signal sequence, and the encoder simply selects the predefined signal sequence based on the state to be signaled. On the other hand, non-sequence-based coding requires providing a generator matrix or parity matrix and codewords (i.e., output sequences) calculated based on the inputs, such that the possible output sequences themselves are unknown but must be calculated through some mathematical representation. This process takes more time than simply selecting a predefined message, and may therefore lead to the situation described above, where the initially acquired or obtained subbands do not receive any transmissions at time t0, and may thus be considered idle by the coexisting system, and then possibly used for transmission by this coexisting system. Using predefined messages avoids this situation and ensures that the UE or transmitter can start using the acquired or obtained subbands for broadband transmission immediately after the LBT process. As mentioned above, the UE can prepare signals in advance for some or all possible states and select their appropriate sequence after performing LBT, thereby avoiding waiting time after the LBT results are available.

[0298] According to other embodiments of the second aspect of the invention, LBT reporting (i.e., signaling the acquired subband, or signaling the LBT mode obtained from the LBT process) can utilize states that indicate multiple possible transmission modes. Modes can be associated with common states, for example, by utilizing power sensing or DMRS detection to make them easily distinguishable from each other. Furthermore, modes associated with common sense can also be associated with high-probability and low-probability outcomes. In this way, the number of actual states to be signaled is reduced, thereby reducing or minimizing the reporting burden on the UE or transmitter because fewer messages, such as sequences of fewer bits, need to be stored and prepared. According to embodiments, each mode can be indicated by multiple bits, for example by two or three bits representing certain predefined LBT modes.

[0299] The following table illustrates an embodiment for reporting LBT modes in control messages (e.g., UCI for uplink communication or DCI for downlink communication), where the receptive UCI / DCI includes, for example, a subband field of predefined bit length, and the settings of each bit are shown in the following tables. The first three tables use a two-bit subband field to indicate possible signaling, allowing the UCI to indicate a maximum of 2 bits for signaling the subband, and a specific bit combination indicated in the first three tables indicates a corresponding subband available for broadband communication. The fourth table indicates an example of using three bits to signal the availability of a subband; that is, the UCI signals a maximum of three bits for signaling, and the available / unavailable subband is signaled through the corresponding combination of three bits indicated in the table.

[0300]

[0301] Table 1 shows exemplary LBT patterns reported, for example, in UL Control Information (UCI).

[0302]

[0303] Table 2 shows exemplary LBT patterns reported, for example, in UL Control Information (UCI).

[0304]

[0305] Table 3 shows exemplary LBT modes reported, for example, in UL Control Information (UCI).

[0306]

[0307]

[0308] Table 4

[0309] An example LBT pattern reported, for instance, in UL Control Information (UCI):

[0310] Regarding the second aspect of the present invention, it should be noted that the above embodiments have been described primarily with reference to uplink communication from a user equipment (e.g., UE) to a base station (e.g., gNB). However, the present invention is not limited to such uplink communication; rather, the principles of the second aspect of the present invention can also be applied to downlink communication from a base station (e.g., gNB) to a user equipment (e.g., UE). Furthermore, as in the first aspect, this principle can be applied to communication between user equipments, such as D2D, V2V, and V2X communication using sidelink broadband communication on multiple subbands.

[0311] The third aspect - pre-configured licenses / allocation for broadband operations

[0312] According to this aspect, embodiments of the present invention provide broadband operation between a transmitter and a receiver, wherein the receiver includes a plurality of predefined broadband configurations, and during broadband operation, receives from the transmitter an indication of the actual broadband configuration to be used for broadband operation, and uses the indicated broadband configuration for transmission to the receiver.

[0313] For example, in a broadband operation initiated by the gNB, although a broadband operation is indicated, the UE can receive a broadband grant or allocation based on a pre-configured broadband operation from the gNB, and the UE expects these subbands to be used only on unoccupied subbands for PDCSH or PUSCH. The UE then performs puncturing or rate matching on the transmissions to be performed to the gNB based on the broadband configuration signaled using continuous or discontinuous frequency allocation. According to an embodiment, the gNB can configure a set of broadband configurations including corresponding subband modes to the UE, and for uplinks within the gNB COT, the gNB can explicitly indicate the PUSCH configuration to be used in the uplink grant to accommodate the fact that some subbands configured for broadband operation are essentially unavailable, i.e., already considered occupied by the gNB. The configuration indicated by the gNB does not include occupied subbands, which allows for dynamic allocation of different broadband uplink configurations, or in other words, the use of different broadband subband sizes.

[0314] Figure 11 An embodiment of the third aspect of the invention is shown, and more specifically, a broadband configuration in an RRC and the corresponding DCI signaling or indication are shown. Figure 11 The BWP 200 is shown on the right-hand side, which defines a pre-configured bandwidth in the manner described in the above embodiment. Naturally, other configurations are also possible. Figure 11In the scenario shown, assuming the gNB performs the LBT process for broadband operation, this results in subbands 2001, 2003, and 2004 being available or unoccupied, while subband 2002 is unavailable (i.e. busy). Therefore, subbands 2001, 2003, and 2004 are also referred to as subbands won by the gNB, while subband 2002 is unwon by the gNB.

[0315] The gNB can use RRC signaling (e.g., dedicated signaling to a specific UE or a group of UEs), or broadcast RRC signaling, which includes possible broadband configurations for uplink transmissions from the UE to the gNB during a COT initiated by the gNB. According to an embodiment, the RRC signaling may indicate the following corresponding configurations:

[0316] Wideband-PDSCH-Config::=SEQUENCE{

[0317] Wideband-PDSCH-Config-ID INTEGER(1..max_configs),

[0318] Configured-Subbands SEQUENCE(SIZE(1..max_subbands))OF INTEGER(1..max_nr_bands)

[0319] }

[0320] Wideband-PDSCH-Config-ID is an integer value between 1 and the maximum number of configurations. The ID indicates a wideband configuration among multiple configurations or a series of configurations signaled by RRC signaling. For each sequence, in addition to the actual ID indicated by wideband-PDSCH-Config-ID, the configured subbands are also indicated by Configured_Subbands, which is a sequence of length 1 to max_subbands (where max_subbands is the maximum number of subbands allowed for wideband operation). This sequence indicates the subband IDs to be used (1..max_nr_bands), where max_nr_bands is the total number of subbands.

[0321] During actual broadband configuration, the gNB can signal the allocation or granting of uplink resources to the UE using Layer 1 (L1) signaling, for example, by transmitting a DCI in the PDSCH. The DCI, in addition to scheduling broadband PDSCH allocation by indicating the time slot timing for the occurrence of the PDSCH (i.e., the occurrence of a downlink transmission from the gNB to the UE), also indicates the broadband configuration for the uplink from the UE to the gNB. Furthermore, modulation and coding schemes, as well as new data indicators, can be signaled.

[0322] Figure 11 The diagram illustrates a scenario where the gNB has won three subbands available for broadband communication as described above and sends a DCI signal to the UE. The DCI indicates Broadband Configuration 1, which tells the UE that, as scheduled by the DCI, subbands 2001, 2003, and 2004 can be used for uplink transmission to the gNB.

[0323] Note that the embodiments in the third aspect are primarily described for the case of gNB-initiated broadband operation; however, these principles also apply to UE-initiated broadband operation. In this case, the gNB includes several broadband configurations for downlink transmission during UE-initiated COT, and the actual broadband configuration for downlink is signaled in the UCI. Furthermore, this embodiment is not limited to communication using, for example, the Uu interface between a base station and a user equipment; instead, the principle can also be applied to sidelink communication, such as D2D, V2V, and V2X communication. In this case, the UE may initially be configured with multiple available broadband configurations, and during actual broadband operation, the transmitting UE signals the receiving UE to the actual broadband configuration to be used, based on the available or idle subbands using, for example, the sidelink control information (SCI).

[0324] Fourth aspect - Transmission preparation, such as PUSCH or PDSCH

[0325] According to this aspect, embodiments of the present invention provide a method in which a receiver in broadband operation stores multiple broadband configurations to be used and receives information from a transmitter regarding the actual broadband configuration to be applied and permission for transmissions from the receiver to the transmitter. The receiver prepares multiple transmissions, each including a different number of subbands or different subband modes. In response to determining the available / unavailable or occupied / unoccupied subbands in the overall broadband configuration (LBT), an appropriate transmission is selected from the prepared transmissions, for example, the transmission that meets one or more criteria or best matches the LBT mode. For example, when considering receiving a UE with a PUSCH-licensed DCI (see, for example...) Figure 11The UE can prepare several PUSCH transmissions for a wideband configuration or a fixed number of predefined subband subsets within a set of wideband configurations. Based on the LBT result performed by the UE, the UE can select a PUSCH transmission.

[0326] • Provide a data rate exceeding a predefined threshold, and / or

[0327] • Provide the maximum transport block size suitable for LBT mode, and / or

[0328] • Provide the maximum number of subbands conforming to LBT mode, and / or

[0329] • Provide channel quality exceeding a predefined threshold, and / or

[0330] • Has a certain priority regarding the configuration of available or associated subbands.

[0331] Figures 12(a) to 12(c) An embodiment is illustrated in which the UE prepares three different PUSCH sizes and selects one PUSCH size based on LBT results. Figure 12(a) indicates a broadband configuration typically used for broadband operation, which in the illustrated example is a broadband configuration spanning three subbands 2001 to 2003 on the BWP 200. The UE can receive an instruction from the gNB that the broadband configuration to be used for broadband operation between the gNB and the UE is the configuration shown in Figure 12(a). As shown in Figure 12(b), in response to this information, the UE creates multiple PUSCH transmissions, in this example three PUSCH transmissions 2061 to 2063, where the first PUSCH 2061 uses all subbands 2001 to 2003, the second PUSCH 2062 uses only subbands 2002 and 2003 without using subband 2001, and PUSCH 2063 uses subbands 2001 and 2002 without using subband 2003. As shown in Figures 12(b) and 12(c), in response to the UE performing LBT, the UE selects, for example, the transmission that best matches the result of the LBT algorithm from transmissions 2061 to 2063. The UE's PHY layer can report which PUSCH has been selected to the MAC layer of the same UE by, for example, reporting the selected transport block size or PUSCH-ID. As shown in Figure 12(c), in the example described, LBT can indicate that only subbands 2002 and 2003 are available among the available subbands 2001 to 2003 in the original broadband configuration 200 (Figure 12(a)), so that the UE selects the prepared transmission 2062 for the actual uplink transmission to the gNB.

[0332] According to other embodiments, for the broadband configuration shown in FIG12(a), the UE may, for example, prepare a first PUSCH using one subband, a second PUSCH using two subbands and a third PUSCH using three subbands (i.e., the maximum number of subbands), and the UE may then select the PUSCH that best suits the LBT result for actual transmission in response to the LBT result.

[0333] The broadband configuration shown in Figure 12(a) can be a broadband configuration signaled to the UE by the gNB, or the UE can be configured with multiple available broadband configurations of different numbers and sizes of subbands, and receive an indication from the gNB of which broadband configurations pre-stored at the UE are used for broadband operation. Signaling the broadband configuration to the UE can be RRC signaling, or dedicated signaling for the UE to which broadband operation applies, or it can be broadcast by the gNB to all UEs within its coverage area. RRC signaling can be as follows:

[0334] Wideband-PUSCH-Preparation-Config::=SEQUENCE{

[0335] Configured-Subbands SEQUENCE(SIZE(1..max_subbands))OF INTEGER(1..max_nr_bands)

[0336] }

[0337] The number and sequence of subbands can be signaled by Configured_Subbands, which is a sequence of length 1 to max_subbands (where max_subbands is the maximum number of subbands allowed for wideband operation). This sequence indicates the subband IDs to be used (1..max_nr_bands), where max_nr_bands is the total number of subbands.

[0338] Another RRC signaling method can be as follows:

[0339] Wideband-PUSCH-Preparation-Config::=SEQUENCE{

[0340] Configured-Subbands INTEGER(1..max_nr_bands)

[0341] }

[0342] The number and sequence of subbands can be signaled by Configured_Subbands, which is a number between 1 and max_subbands, where max_subbands is the maximum number of subbands that are allowed or (pre)configured for wideband operation.

[0343] According to other embodiments of the fourth aspect, the UE may prepare PUSCH transmissions differently to handle LBT failures on one or more subbands indicated in the broadband configuration available at the UE. For example, according to an embodiment, the UE may prepare only the shortest PUSCH length (e.g., only one subband), and if available, transmit only the minimum repeating size on other subbands in a manner shown, for example, in Figures 10(c) and 10(d), to keep the bands busy to avoid new forced LBTs. By providing corresponding bits or combinations of bits in the UCI to indicate the actual subband used for uplink communication, the UE may, for example, use UL signaling to indicate the number of subbands used, in a manner as described above. For example, the bit combinations indicated in the table shown above with reference to the third aspect may be used. The UE may also indicate repeating the PUSCH in the PUCCH. According to other embodiments, the UE may generate multiple possible subband sizes and punch the size closest to the number of available subbands, thereby reducing the size through punching. For example, assuming a broadband configuration has four subbands, only two of which are unused, and the nearest prepared transmission uses three subbands, the transmission can be punctured to remove one unused subband from the transmission. The UE can indicate the number of subbands used, for example, using the bit combinations indicated in the table shown above with reference to the third aspect, and by using puncturing the PUCCH.

[0344] Note that the fourth aspect of the embodiment has been described primarily for gNBs initiating broadband operations; however, these principles are equally applicable to broadband operations initiated by UEs. Furthermore, this embodiment is not limited to communication using, for example, the Uu interface between a base station and a user equipment; instead, the principles can also be applied to sidelink communications such as D2D, V2V, and V2X communications.

[0345] Fifth aspect – Control channel monitoring enables unwon subbands

[0346] According to this aspect, embodiments of the invention allow the UE or gNB to also monitor unacquired subbands, i.e., subbands indicated as busy or occupied by the LBT process. According to embodiments, for example, if the UE is switching PDCCH monitoring to a subband that was not detected or signaled to the gNB-COT within the configured broadband configuration (such as a configured BWP), the UE can be configured by the network to also monitor such subbands, i.e., subbands determined to be busy by the LBT. This aspect can be a UE capability indicated to the gNB, for example, during connection establishment. The advantage of this aspect is that a UE operating in this manner is in a situation where it receives transmissions from the gNB immediately after the subband has been reacquired (e.g., according to the first aspect above), without needing explicit awareness of the new subband. The UE is already prepared to process transmissions on the reacquired subband and does not require any indication from the gNB to do so. Therefore, except in embodiments of the first aspect, there is no need to signal that a subband has been reacquired. This approach is advantageous because it allows the start of COT for a reacquired subband to also be used for broadband operation.

[0347] Note that the embodiments of the fifth aspect are mainly described for communication between gNB and UE. However, the present invention is not limited to communication using, for example, the Uu interface between a base station and a user equipment. Instead, the principle can also be applied to sidelink communication, such as D2D, V2V, and V2X communication.

[0348] Sixth aspect - Additional details on the drilled portion

[0349] According to this aspect, embodiments of the invention allow the transmission of data initially associated with a subband, which is not used for broadband operation because it is occupied by other systems. For example, in the case where a subband for broadband transmission as defined by a broadband configuration (see, for example, FIG. 12(a)) cannot be won (i.e., it is not available for broadband operation), the transmitter (which may be a UE or gNB) may decide to punch a portion of the transmission to be sent in the unwon subband. This may degrade the decoding performance of the transmission at the receiver. To avoid this degradation, according to an embodiment of the sixth aspect, the transmitter (such as a UE or gNB) may append the untransmitted portion of the transmission to one or more subbands from the broadband configuration, which have been determined to be available for transmission, i.e., unoccupied or idle, in response to the LBT process.

[0350] Figures 13(a) to 13(b)An embodiment for appending a punctured portion of a transmission is illustrated. Figure 13(a) shows an embodiment in which the initial untransmitted portion of the transmission is appended by initiating a new COT using an LBT procedure. Figure 13(a) illustrates a broadband configuration using three subbands 2001 to 2003 for broadband communication initiated by a UE, for example, to a gNB or another UE, when applying sidelink communication. The LBT procedure performed by the UE results in the following: in the subbands, subband 2001 is occupied by another system (i.e., unavailable for transmission), while subbands 2002 and 2003 are idle or unoccupied. Therefore, after the LBT procedure, the original transmission is punctured (i.e., the portion of the transmission associated with the occupied subband 2001 is removed), and the initial transmission COT is appended. UE Only the portion of the transmission associated with available subbands 2002 and 2003 (i.e., PUSCH 206) is transmitted. The UE performing the puncturing transmits PUCCH 210 during PUSCH 206 to notify the receiver (i.e., the base station or other UE) that transmission 206 is only a part of the transmission (i.e., it has been punctured) and that in subsequent transmissions on subband 2003, the remaining portion of the original transmission, or the punctured portion 206', will be transmitted at subsequent transmission time COT. UE During transmission. In the example of Figure 13(a), to append the punched portion 206' of the original transmission, a new COT is initiated by performing an additional LBT procedure on one of the initially discovered unoccupied subbands. In the example of Figure 13(a), the additional LBT procedure is performed in subband 2003 using, for example, CAT-4 or CAT-2 LBT, and if subband 2003 is still available (i.e., not busy or occupied), the transmitter (e.g., UE) sends the lost portion 206' to the receiver. If subband 2003 is unavailable (i.e., occupied by another system), the lost portion may be discarded.

[0351] Figure 13(b) illustrates another embodiment of this aspect, where a new COT is not required (i.e., no additional LBT is performed), but the initial COT is extended. For example, the UE or gNB might consider extending the COT during channel access for the transmission itself, and it might select a CWS for the LBT such that the maximum allowed COT duration is sufficient to append some portion of the original transmission. If the transmitter initially acquires all subbands for broadband transmission (i.e., subbands not occupied in the broadband configuration to be used), the maximum COT time is not used, and only the actual transmission transmission 206 time is used. However, in the event of one or more subbands being lost, the UE / gNB can use the additional COT duration on one or more subbands that have been determined to be idle by the LBT process for the punctured portion of the transmission 206'. In Figure 13(b), the UE applies the maximum COT during the initial LBT process. However, for the original transmission 206, only the first part of the maximum COT is required. Thus, in the case illustrated in Figure 13(a) above (where subband 2001 is unavailable), the transmission associated with that subband can be appended to the available subband 2002 or 2003 in the second part of the COT.

[0352] Note that the sixth aspect embodiment has been described primarily for UEs initiating broadband operations; however, these principles are equally applicable to broadband operations initiated by gNBs. Furthermore, this embodiment is not limited to communication using, for example, the Uu interface between a base station and a user equipment; instead, the principles can also be applied to sidelink communications such as D2D, V2V, and V2X communications.

[0353] Seventh aspect - Fast control of separate subcarrier spacing (SCS) without LBT

[0354] According to this aspect, embodiments of the invention allow certain information (e.g., feedback information, etc.) to be sent directly after actual transmission without applying additional LBT. Embodiments of the seventh aspect can be used for both broadband and non-broadband operations (i.e., transmissions for performing LBT) to determine whether one or more subbands are available for transmission or are unavailable due to being occupied by another coexisting system.

[0355] Figures 14(a) to 14(b) An embodiment of the seventh aspect is shown, which is based on the operation of transmitting information on a single subband 2001 that can be shared between different communication systems.

[0356] Figure 14(a) illustrates an embodiment of uplink transmission from the UE to the gNB. Initially, the UE performs an LBT to determine whether subband 2001 is idle or unoccupied. If subband 2001 is idle, the UE performs uplink transmission PUSCH 206 after the LBT process, using, for example, a subcarrier spacing of 15 kHz, from time t0 to time t1. After uplink communication and after a gap from time t1 to time t2, starting from time t2, the UE receives control messages PDCCH 202 from the gNB in ​​a separate portion with a subcarrier spacing of 60 kHz.

[0357] Figure 14(b) shows a scenario similar to that described in reference 14(a), but for downlink communication from gNB to UE during time t0 to t1 and for uplink transmission from UE to gNB, it begins at time t2.

[0358] The same configuration can be used for sidelink communication between user equipment, so that the UE that is sending initially uses the first subcarrier interval to send and uses a higher second subcarrier interval to receive acknowledgments from the UE that is receiving, etc.

[0359] Because feedback is sent directly after the actual transmission is enabled, see the above reference. Figures 14(a) to 14(b) The described embodiments allow for the implementation of, for example, a HARQ feedback process similar to that in IEEE 802.11 in NR-U environments using single-subband or wideband communication, without requiring additional LBTs. In IEEE 802.11, this is feasible because the HARQ transmission itself is completed immediately after the initial transmission and is very short. To implement this approach according to NR-U, the transmission duration of subband 2001 during COT is pre-configured so that separate subcarrier intervals exist, one of which is used for the transmission, while a different, higher subcarrier interval is used for immediate control transmissions, optionally provided with small handover intervals to allow the UE to adapt to signal reception with different subcarrier intervals. This allows, for example, HARQ feedback to be sent from the UE to the gNB, from the gNB to the UE, or between UEs within COT at the end of the actual transmission, thus avoiding the need to perform new LBTs. Since OFDM symbols with higher SCS are shorter in time, the transmission of control data is also faster.

[0360] Note that the embodiments of the seventh aspect are mainly described for communication between gNB and UE. However, the present invention is not limited to communication using, for example, the Uu interface between a base station and a user equipment. Instead, the principle can also be applied to sidelink communication, such as D2D, V2V, and V2X communication.

[0361] Overview

[0362] Regarding the above embodiments of various aspects of the present invention, note that they have been described in an environment where communication takes place between a transmitter (such as a gNB or UE) and a receiver (such as a UE and a gNB). However, the present invention is not limited to such communication; rather, the above principles can also be applied to device-to-device communication, such as D2D, V2V, and V2X communication. In this case, communication occurs via a sidelink between the various devices. The transmitter is a first UE, and the receiver is a second UE that uses sidelink resources for communication.

[0363] Regarding the above embodiments concerning various aspects of the invention, note that they have been described in an environment using a BWP with four subbands having the same bandwidth. Naturally, the invention is not limited to this BWP, but can employ narrower or wider BWPs including more or fewer subbands of the same or different bandwidths.

[0364] The embodiments of the present invention have been described in detail above, and each embodiment and aspect can be implemented individually, or two or more embodiments or aspects can be combined.

[0365] The embodiments of the present invention have been described in detail above with reference to sidelink communication using the PC5 interface. However, the present invention is not limited to using the PC5 interface. Any other interface that allows direct communication between one or more UEs may be used, such as interfaces according to the IEEE 802.11p standard, the IEEE 802.15.4 standard (Zigbee), etc.

[0366] According to embodiments, a wireless communication system may include a terrestrial network, a non-terrestrial network, or a network or network segment that uses an airborne or spaceborne aircraft or a combination thereof as a receiver.

[0367] According to embodiments, the receiver may include one or more of a mobile or fixed terminal, an IoT device, a ground vehicle, an aircraft, a drone, a building, or any other item or device that provides network connectivity, enabling the item / device to communicate using a wireless communication system (such as a sensor or actuator). According to embodiments, the transmitter may include one or more of a macrocell base station, a small cell base station, a spaceborne aircraft (such as a satellite or space), an airborne aircraft (such as an unmanned aerial vehicle system (UAS), for example, a tethered UAS, a lighter-than-air UAS (LTA), a heavier-than-air UAS (HTA), and a high-altitude UAS platform (HAP)), or any transmit / receive point (TRP) that enables an item or device with network connectivity to communicate using a wireless communication system.

[0368] Although some aspects of the concept have been described in the context of the apparatus, it is clear that these aspects also represent a description of the corresponding method, where a block or device corresponds to a method step or a feature of a method step. Similarly, aspects described in the context of method steps also represent a description of the features of the corresponding block or item or the corresponding apparatus.

[0369] The various elements and features of this invention can be implemented in hardware or software using analog and / or digital circuitry, by executing instructions via one or more general-purpose or special-purpose processors, or as a combination of hardware and software. For example, embodiments of this invention can be implemented in a computer system or another processing system environment. Figure 15 An example of a computer system 500 is shown. These units or modules, and the steps of the methods performed by these units, can be executed on one or more computer systems 500. The computer system 500 includes one or more processors 502, such as dedicated or general-purpose digital signal processors. The processors 502 are connected to a communication infrastructure 504, such as a bus or network. The computer system 500 includes: main memory 506, such as random access memory (RAM); and secondary memory 508, such as hard disk drives and / or removable storage drives. The secondary memory 508 may allow computer programs or other instructions to be loaded into the computer system 500. The computer system 500 may also include a communication interface 510 to allow software and data to be transferred between the computer system 500 and external devices. Communication can be in the form of electrical, electromagnetic, optical, or other signals that can be processed by the communication interface. Communication can use wires or cables, optical fibers, telephone lines, cellular telephone links, RF links, and other communication channels 512.

[0370] The terms "computer program medium" and "computer-readable medium" are generally used to refer to tangible storage media, such as removable storage units or hard disks installed in hard disk drives. These computer program products are means for providing software to computer system 500. The computer program, also referred to as computer control logic, is stored in main memory 506 and / or auxiliary memory 508. The computer program can also be received via communication interface 510. When executed, the computer program enables computer system 500 to implement the present invention. In particular, when executed, the computer program enables processor 502 to implement the processes of the present invention, such as any of the methods described herein. Therefore, such a computer program can represent a controller of computer system 500. When the present disclosure is implemented using software, the software can be stored in a computer program product and loaded into computer system 500 using a removable storage drive or an interface (such as communication interface 510).

[0371] Digital storage media, such as cloud storage, floppy disks, DVDs, Blu-ray discs, CDs, ROMs, PROMs, EPROMs, EEPROMs, or FLASH memories, can be used to execute hardware or software implementations. These media store electronically readable control signals that cooperate with (or are capable of cooperating with) a programmable computer system to execute corresponding methods. Therefore, digital storage media can be computer-readable.

[0372] Some embodiments of the invention include a data carrier having electronically readable control signals, which is capable of cooperating with a programmable computer system to perform one of the methods described herein.

[0373] Typically, embodiments of the present invention can be implemented as a computer program product having program code operable to perform one of these methods when the computer program product is run on a computer. The program code may, for example, be stored on a machine-readable medium.

[0374] Other embodiments include a computer program stored on a machine-readable medium for performing one of the methods described herein. In other words, embodiments of the methods of the invention are therefore computer programs having program code for performing one of the methods described herein when the computer program is run on a computer.

[0375] Therefore, another embodiment of the method of the present invention is a data carrier (or digital storage medium or computer-readable medium) on which a computer program is recorded, the computer program being used to perform one of the methods described herein. Therefore, another embodiment of the method of the present invention is a data stream or signal sequence representing a computer program being used to perform one of the methods described herein. The data stream or signal sequence may, for example, be configured to be transmitted via a data communication connection (e.g., via the Internet). Another embodiment includes a processing device, such as a computer or programmable logic device, configured or adapted to perform one of the methods described herein. Another embodiment includes a computer on which a computer program is installed, the computer program being used to perform one of the methods described herein.

[0376] In some embodiments, a programmable logic device (e.g., a field-programmable gate array) may be used to perform some or all of the functions described herein. In some embodiments, the field-programmable gate array may cooperate with a microprocessor to perform one of the methods described herein. Generally, the methods are preferably performed by any hardware device.

[0377] The above embodiments are merely illustrative of the principles of the present invention. It should be understood that modifications and variations of the arrangements and details described herein will be apparent to those skilled in the art. Therefore, the invention is intended to be limited only by the scope of the appended claims and not by the specific details given by way of the description and explanation of the embodiments herein.

[0378] List of acronyms and symbols

[0379]

Claims

1. An apparatus for performing broadband communication in a wireless communication system. in, For broadband communication with one or more transceivers in the wireless communication system using one or more subbands of a predefined broadband, the apparatus is configured to: • Perform an initial listen-before-tell (LBT) on each subband of the predefined broadband to identify one or more unoccupied subbands from the predefined broadband, wherein broadband communication is permitted on the one or more unoccupied subbands during a certain transmission time (COT). • During the specified transmission time (COT), use the unoccupied subband to send to and / or receive from the transceiver, and During the specified transmission time (COT), and if one or more of the initial LBT indicator subbands are occupied, the device is configured to: • Perform additional LBT on the one or more occupied subbands to determine that one or more of the initially occupied subbands are no longer occupied, and • In addition to the initially unoccupied subbands, the transceiver also uses one or more unoccupied subbands to send and / or receive data from the transceiver. The device is configured to signal to the one or more transceivers that the no longer occupied subband is available. The device is configured to provide control messages to the one or more transceivers, the control messages indicating the subbands that are no longer occupied, and Specifically, for performing the additional LBT, the device is configured to: while using the one or more unoccupied subbands for transmission / reception, continue to perform the additional LBT on the one or more occupied subbands.

2. The apparatus according to claim 1, wherein, The device is configured to transmit to and / or receive from the transceiver using one or more unoccupied subbands during a transmission time, the transmission time... • Equal to the specified transmission time (COT), or • Longer than a certain transmission time (COT), or • Shorter than a certain transmission time (COT).

3. The apparatus according to claim 2, wherein, The transmission time of the one or more subbands that are no longer occupied • Basically aligned with the end of a certain transmission time (COT); or • Not aligned with the end of a certain transmission time (COT).

4. The apparatus according to claim 1, wherein, The device is configured to: use one or more subbands from the initially unoccupied subbands and / or one or more subbands from the unoccupied subbands, and a control message indicating the unoccupied subbands, to signal to the one or more transceivers that the unoccupied subbands are unaccounted for.

5. The apparatus according to claim 1, wherein, The control messages are provided by the device via the core network using RRC signaling, L1 signaling, or over-the-top OTT signaling.

6. The apparatus according to claim 1, wherein, The control message includes a subband field that indicates which subbands of the predefined bandwidth are available.

7. The apparatus according to claim 6, wherein, The subband field indicates which subbands of the predefined bandwidth are available by setting the corresponding bit associated with the subband to a first value indicating an unoccupied state or a second value indicating an occupied state.

8. The apparatus according to claim 1, wherein The device is a base station (gNB) of the wireless communication system and is configured to signal to one or more user equipments (UEs) of the wireless communication system the unoccupied subband in the PDCCH, the PDCCH including DCI, or The device is a user equipment (UE) of the wireless communication system and is configured to signal to one or more base stations (gNBs) of the wireless communication system the unoccupied subband in the PUCCH, the PUCCH including UCI, or The device is a user equipment (UE) of the wireless communication system and is configured to signal to one or more user equipments (UEs) of the wireless communication system the unoccupied subband in the PSCCH, the PSCCH including SCI.

9. The apparatus according to claim 1, wherein, The signal notification indicates the frequency and / or bandwidth of the sub-band that is no longer occupied.

10. The apparatus according to claim 1, wherein, The device is configured to wait for a certain period of time before transmitting using the no longer occupied subband.

11. The apparatus of claim 10, further comprising a timer (T), said timer (T) being a pre-configured timer or a configured timer, wherein the apparatus then transmits on the no longer occupied subband, wherein, The timer can be started directly after an indication or signaling that a subband that is no longer occupied is indicated.

12. The apparatus according to claim 1, wherein, The device is configured to send a reservation signaling at the beginning of the transmission time associated with the no longer occupied subband to reserve the subband.

13. The apparatus according to claim 1, in, The device includes a user equipment (UE), which may be a mobile terminal, a fixed terminal, a cellular IoT-UE, a vehicle-mounted UE, a vehicle-mounted group (GL) UE, an IoT or narrowband IoT (NB-IoT) device, a ground vehicle, an aircraft, a drone, a mobile base station, a roadside unit, a building, or any other item or device provided with a network connection, the network connection enabling the item / device to communicate using a wireless communication network, or The device includes a base station, which includes one or more of the following: a macro cell base station, or a small cell base station, or a central unit of a base station, or a distributed unit of a base station, or a roadside unit, or a UE, or a group leader (GL), or a relay, or a remote radio head, or an AMF, or an SMF, or a core network entity, or a mobile edge computing entity, or a network slice in an NR or 5G core context, or any transmit / receive point (TRP) that enables an item or device to communicate using the wireless communication network, wherein the item or device is provided with network connectivity to communicate using the wireless communication network.

14. A wireless communication system comprising a plurality of devices according to claim 1.

15. A method for performing broadband communication in a wireless communication system, the method comprising: For broadband communication using one or more subbands of a predefined bandwidth with one or more transceivers in the wireless communication system. • Perform an initial listen-before-tell (LBT) on each subband of the predefined broadband to identify one or more unoccupied subbands from the predefined broadband, wherein broadband communication is permitted on the one or more unoccupied subbands during a certain transmission time (COT). • During the specified transmission time (COT), use the unoccupied subband to send to and / or receive from the transceiver, and During the specified transmission time (COT), and if one or more of the initial LBT indicator subbands are occupied, • Perform additional LBT on the one or more occupied subbands to determine that one or more of the initially occupied subbands are no longer occupied, and • In addition to the initially unoccupied subbands, the transceiver also uses one or more unoccupied subbands to send and / or receive data from the transceiver. The method further includes: Signal the one or more transceivers to notify that the subband that is no longer in use is available. Specifically, a control message is provided to the one or more transceivers, the control message indicating the subband that is no longer occupied, and To perform the additional LBT, the method further includes: While transmitting / receiving using the one or more unoccupied subbands, the additional LBT continues to be performed on the one or more occupied subbands.

16. A non-transitory computer program product comprising a computer-readable medium storing instructions that, when executed on a computer, perform the method of claim 15.

17. An apparatus for performing broadband communication in a wireless communication system, comprising: One or more processors are configured to cause the device to perform the following operations: For broadband communication using one or more subbands of a predefined bandwidth with one or more transceivers in the wireless communication system. • Perform an initial listen-before-tell (LBT) on each subband of the predefined broadband to identify one or more unoccupied subbands from the predefined broadband, wherein broadband communication is permitted on the one or more unoccupied subbands during a certain transmission time (COT). • During the specified transmission time (COT), use the unoccupied subband to send to and / or receive from the transceiver, and During the specified transmission time (COT), and if one or more of the initial LBT indicator subbands are occupied, the one or more processors are further configured to cause the device to perform the following operations: • Perform additional LBT on the one or more occupied subbands to determine that one or more of the initially occupied subbands are no longer occupied, and • In addition to the initially unoccupied subbands, the transceiver also uses one or more unoccupied subbands to send and / or receive data from the transceiver. The one or more processors are further configured to cause the device to perform the following operations: Signal the one or more transceivers to notify that the subband that is no longer in use is available. Specifically, a control message is provided to the one or more transceivers, the control message indicating the subband that is no longer occupied, and In order to execute the additional LBT, the one or more processors are further configured to cause the device to perform the following operations: While transmitting / receiving using the one or more unoccupied subbands, the additional LBT continues to be performed on the one or more occupied subbands.

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